From 4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Tue, 9 Apr 2024 15:34:27 +0200
Subject: Adding upstream version 1:2.43.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 contrib/completion/.gitattributes      |    1 +
 contrib/completion/git-completion.bash | 3661 ++++++++++++++++++++++++++++++++
 contrib/completion/git-completion.tcsh |  127 ++
 contrib/completion/git-completion.zsh  |  294 +++
 contrib/completion/git-prompt.sh       |  594 ++++++
 5 files changed, 4677 insertions(+)
 create mode 100644 contrib/completion/.gitattributes
 create mode 100644 contrib/completion/git-completion.bash
 create mode 100644 contrib/completion/git-completion.tcsh
 create mode 100644 contrib/completion/git-completion.zsh
 create mode 100644 contrib/completion/git-prompt.sh

(limited to 'contrib/completion')

diff --git a/contrib/completion/.gitattributes b/contrib/completion/.gitattributes
new file mode 100644
index 0000000..1911694
--- /dev/null
+++ b/contrib/completion/.gitattributes
@@ -0,0 +1 @@
+*.bash eol=lf
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
new file mode 100644
index 0000000..13a39eb
--- /dev/null
+++ b/contrib/completion/git-completion.bash
@@ -0,0 +1,3661 @@
+# bash/zsh completion support for core Git.
+#
+# Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
+# Conceptually based on gitcompletion (http://gitweb.hawaga.org.uk/).
+# Distributed under the GNU General Public License, version 2.0.
+#
+# The contained completion routines provide support for completing:
+#
+#    *) local and remote branch names
+#    *) local and remote tag names
+#    *) .git/remotes file names
+#    *) git 'subcommands'
+#    *) git email aliases for git-send-email
+#    *) tree paths within 'ref:path/to/file' expressions
+#    *) file paths within current working directory and index
+#    *) common --long-options
+#
+# To use these routines:
+#
+#    1) Copy this file to somewhere (e.g. ~/.git-completion.bash).
+#    2) Add the following line to your .bashrc/.zshrc:
+#        source ~/.git-completion.bash
+#    3) Consider changing your PS1 to also show the current branch,
+#       see git-prompt.sh for details.
+#
+# If you use complex aliases of form '!f() { ... }; f', you can use the null
+# command ':' as the first command in the function body to declare the desired
+# completion style.  For example '!f() { : git commit ; ... }; f' will
+# tell the completion to use commit completion.  This also works with aliases
+# of form "!sh -c '...'".  For example, "!sh -c ': git commit ; ... '".
+# Note that "git" is optional --- '!f() { : commit; ...}; f' would complete
+# just like the 'git commit' command.
+#
+# If you have a command that is not part of git, but you would still
+# like completion, you can use __git_complete:
+#
+#   __git_complete gl git_log
+#
+# Or if it's a main command (i.e. git or gitk):
+#
+#   __git_complete gk gitk
+#
+# Compatible with bash 3.2.57.
+#
+# You can set the following environment variables to influence the behavior of
+# the completion routines:
+#
+#   GIT_COMPLETION_CHECKOUT_NO_GUESS
+#
+#     When set to "1", do not include "DWIM" suggestions in git-checkout
+#     and git-switch completion (e.g., completing "foo" when "origin/foo"
+#     exists).
+#
+#   GIT_COMPLETION_SHOW_ALL_COMMANDS
+#
+#     When set to "1" suggest all commands, including plumbing commands
+#     which are hidden by default (e.g. "cat-file" on "git ca<TAB>").
+#
+#   GIT_COMPLETION_SHOW_ALL
+#
+#     When set to "1" suggest all options, including options which are
+#     typically hidden (e.g. '--allow-empty' for 'git commit').
+#
+#   GIT_COMPLETION_IGNORE_CASE
+#
+#     When set, uses for-each-ref '--ignore-case' to find refs that match
+#     case insensitively, even on systems with case sensitive file systems
+#     (e.g., completing tag name "FOO" on "git checkout f<TAB>").
+
+case "$COMP_WORDBREAKS" in
+*:*) : great ;;
+*)   COMP_WORDBREAKS="$COMP_WORDBREAKS:"
+esac
+
+# Discovers the path to the git repository taking any '--git-dir=<path>' and
+# '-C <path>' options into account and stores it in the $__git_repo_path
+# variable.
+__git_find_repo_path ()
+{
+	if [ -n "${__git_repo_path-}" ]; then
+		# we already know where it is
+		return
+	fi
+
+	if [ -n "${__git_C_args-}" ]; then
+		__git_repo_path="$(git "${__git_C_args[@]}" \
+			${__git_dir:+--git-dir="$__git_dir"} \
+			rev-parse --absolute-git-dir 2>/dev/null)"
+	elif [ -n "${__git_dir-}" ]; then
+		test -d "$__git_dir" &&
+		__git_repo_path="$__git_dir"
+	elif [ -n "${GIT_DIR-}" ]; then
+		test -d "$GIT_DIR" &&
+		__git_repo_path="$GIT_DIR"
+	elif [ -d .git ]; then
+		__git_repo_path=.git
+	else
+		__git_repo_path="$(git rev-parse --git-dir 2>/dev/null)"
+	fi
+}
+
+# Deprecated: use __git_find_repo_path() and $__git_repo_path instead
+# __gitdir accepts 0 or 1 arguments (i.e., location)
+# returns location of .git repo
+__gitdir ()
+{
+	if [ -z "${1-}" ]; then
+		__git_find_repo_path || return 1
+		echo "$__git_repo_path"
+	elif [ -d "$1/.git" ]; then
+		echo "$1/.git"
+	else
+		echo "$1"
+	fi
+}
+
+# Runs git with all the options given as argument, respecting any
+# '--git-dir=<path>' and '-C <path>' options present on the command line
+__git ()
+{
+	git ${__git_C_args:+"${__git_C_args[@]}"} \
+		${__git_dir:+--git-dir="$__git_dir"} "$@" 2>/dev/null
+}
+
+# Removes backslash escaping, single quotes and double quotes from a word,
+# stores the result in the variable $dequoted_word.
+# 1: The word to dequote.
+__git_dequote ()
+{
+	local rest="$1" len ch
+
+	dequoted_word=""
+
+	while test -n "$rest"; do
+		len=${#dequoted_word}
+		dequoted_word="$dequoted_word${rest%%[\\\'\"]*}"
+		rest="${rest:$((${#dequoted_word}-$len))}"
+
+		case "${rest:0:1}" in
+		\\)
+			ch="${rest:1:1}"
+			case "$ch" in
+			$'\n')
+				;;
+			*)
+				dequoted_word="$dequoted_word$ch"
+				;;
+			esac
+			rest="${rest:2}"
+			;;
+		\')
+			rest="${rest:1}"
+			len=${#dequoted_word}
+			dequoted_word="$dequoted_word${rest%%\'*}"
+			rest="${rest:$((${#dequoted_word}-$len+1))}"
+			;;
+		\")
+			rest="${rest:1}"
+			while test -n "$rest" ; do
+				len=${#dequoted_word}
+				dequoted_word="$dequoted_word${rest%%[\\\"]*}"
+				rest="${rest:$((${#dequoted_word}-$len))}"
+				case "${rest:0:1}" in
+				\\)
+					ch="${rest:1:1}"
+					case "$ch" in
+					\"|\\|\$|\`)
+						dequoted_word="$dequoted_word$ch"
+						;;
+					$'\n')
+						;;
+					*)
+						dequoted_word="$dequoted_word\\$ch"
+						;;
+					esac
+					rest="${rest:2}"
+					;;
+				\")
+					rest="${rest:1}"
+					break
+					;;
+				esac
+			done
+			;;
+		esac
+	done
+}
+
+# The following function is based on code from:
+#
+#   bash_completion - programmable completion functions for bash 3.2+
+#
+#   Copyright © 2006-2008, Ian Macdonald <ian@caliban.org>
+#             © 2009-2010, Bash Completion Maintainers
+#                     <bash-completion-devel@lists.alioth.debian.org>
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2, or (at your option)
+#   any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program; if not, see <http://www.gnu.org/licenses/>.
+#
+#   The latest version of this software can be obtained here:
+#
+#   http://bash-completion.alioth.debian.org/
+#
+#   RELEASE: 2.x
+
+# This function can be used to access a tokenized list of words
+# on the command line:
+#
+#	__git_reassemble_comp_words_by_ref '=:'
+#	if test "${words_[cword_-1]}" = -w
+#	then
+#		...
+#	fi
+#
+# The argument should be a collection of characters from the list of
+# word completion separators (COMP_WORDBREAKS) to treat as ordinary
+# characters.
+#
+# This is roughly equivalent to going back in time and setting
+# COMP_WORDBREAKS to exclude those characters.  The intent is to
+# make option types like --date=<type> and <rev>:<path> easy to
+# recognize by treating each shell word as a single token.
+#
+# It is best not to set COMP_WORDBREAKS directly because the value is
+# shared with other completion scripts.  By the time the completion
+# function gets called, COMP_WORDS has already been populated so local
+# changes to COMP_WORDBREAKS have no effect.
+#
+# Output: words_, cword_, cur_.
+
+__git_reassemble_comp_words_by_ref()
+{
+	local exclude i j first
+	# Which word separators to exclude?
+	exclude="${1//[^$COMP_WORDBREAKS]}"
+	cword_=$COMP_CWORD
+	if [ -z "$exclude" ]; then
+		words_=("${COMP_WORDS[@]}")
+		return
+	fi
+	# List of word completion separators has shrunk;
+	# re-assemble words to complete.
+	for ((i=0, j=0; i < ${#COMP_WORDS[@]}; i++, j++)); do
+		# Append each nonempty word consisting of just
+		# word separator characters to the current word.
+		first=t
+		while
+			[ $i -gt 0 ] &&
+			[ -n "${COMP_WORDS[$i]}" ] &&
+			# word consists of excluded word separators
+			[ "${COMP_WORDS[$i]//[^$exclude]}" = "${COMP_WORDS[$i]}" ]
+		do
+			# Attach to the previous token,
+			# unless the previous token is the command name.
+			if [ $j -ge 2 ] && [ -n "$first" ]; then
+				((j--))
+			fi
+			first=
+			words_[$j]=${words_[j]}${COMP_WORDS[i]}
+			if [ $i = $COMP_CWORD ]; then
+				cword_=$j
+			fi
+			if (($i < ${#COMP_WORDS[@]} - 1)); then
+				((i++))
+			else
+				# Done.
+				return
+			fi
+		done
+		words_[$j]=${words_[j]}${COMP_WORDS[i]}
+		if [ $i = $COMP_CWORD ]; then
+			cword_=$j
+		fi
+	done
+}
+
+if ! type _get_comp_words_by_ref >/dev/null 2>&1; then
+_get_comp_words_by_ref ()
+{
+	local exclude cur_ words_ cword_
+	if [ "$1" = "-n" ]; then
+		exclude=$2
+		shift 2
+	fi
+	__git_reassemble_comp_words_by_ref "$exclude"
+	cur_=${words_[cword_]}
+	while [ $# -gt 0 ]; do
+		case "$1" in
+		cur)
+			cur=$cur_
+			;;
+		prev)
+			prev=${words_[$cword_-1]}
+			;;
+		words)
+			words=("${words_[@]}")
+			;;
+		cword)
+			cword=$cword_
+			;;
+		esac
+		shift
+	done
+}
+fi
+
+# Fills the COMPREPLY array with prefiltered words without any additional
+# processing.
+# Callers must take care of providing only words that match the current word
+# to be completed and adding any prefix and/or suffix (trailing space!), if
+# necessary.
+# 1: List of newline-separated matching completion words, complete with
+#    prefix and suffix.
+__gitcomp_direct ()
+{
+	local IFS=$'\n'
+
+	COMPREPLY=($1)
+}
+
+# Similar to __gitcomp_direct, but appends to COMPREPLY instead.
+# Callers must take care of providing only words that match the current word
+# to be completed and adding any prefix and/or suffix (trailing space!), if
+# necessary.
+# 1: List of newline-separated matching completion words, complete with
+#    prefix and suffix.
+__gitcomp_direct_append ()
+{
+	local IFS=$'\n'
+
+	COMPREPLY+=($1)
+}
+
+__gitcompappend ()
+{
+	local x i=${#COMPREPLY[@]}
+	for x in $1; do
+		if [[ "$x" == "$3"* ]]; then
+			COMPREPLY[i++]="$2$x$4"
+		fi
+	done
+}
+
+__gitcompadd ()
+{
+	COMPREPLY=()
+	__gitcompappend "$@"
+}
+
+# Generates completion reply, appending a space to possible completion words,
+# if necessary.
+# It accepts 1 to 4 arguments:
+# 1: List of possible completion words.
+# 2: A prefix to be added to each possible completion word (optional).
+# 3: Generate possible completion matches for this word (optional).
+# 4: A suffix to be appended to each possible completion word (optional).
+__gitcomp ()
+{
+	local cur_="${3-$cur}"
+
+	case "$cur_" in
+	*=)
+		;;
+	--no-*)
+		local c i=0 IFS=$' \t\n'
+		for c in $1; do
+			if [[ $c == "--" ]]; then
+				continue
+			fi
+			c="$c${4-}"
+			if [[ $c == "$cur_"* ]]; then
+				case $c in
+				--*=|*.) ;;
+				*) c="$c " ;;
+				esac
+				COMPREPLY[i++]="${2-}$c"
+			fi
+		done
+		;;
+	*)
+		local c i=0 IFS=$' \t\n'
+		for c in $1; do
+			if [[ $c == "--" ]]; then
+				c="--no-...${4-}"
+				if [[ $c == "$cur_"* ]]; then
+					COMPREPLY[i++]="${2-}$c "
+				fi
+				break
+			fi
+			c="$c${4-}"
+			if [[ $c == "$cur_"* ]]; then
+				case $c in
+				*=|*.) ;;
+				*) c="$c " ;;
+				esac
+				COMPREPLY[i++]="${2-}$c"
+			fi
+		done
+		;;
+	esac
+}
+
+# Clear the variables caching builtins' options when (re-)sourcing
+# the completion script.
+if [[ -n ${ZSH_VERSION-} ]]; then
+	unset ${(M)${(k)parameters[@]}:#__gitcomp_builtin_*} 2>/dev/null
+else
+	unset $(compgen -v __gitcomp_builtin_)
+fi
+
+# This function is equivalent to
+#
+#    __gitcomp "$(git xxx --git-completion-helper) ..."
+#
+# except that the output is cached. Accept 1-3 arguments:
+# 1: the git command to execute, this is also the cache key
+# 2: extra options to be added on top (e.g. negative forms)
+# 3: options to be excluded
+__gitcomp_builtin ()
+{
+	# spaces must be replaced with underscore for multi-word
+	# commands, e.g. "git remote add" becomes remote_add.
+	local cmd="$1"
+	local incl="${2-}"
+	local excl="${3-}"
+
+	local var=__gitcomp_builtin_"${cmd//-/_}"
+	local options
+	eval "options=\${$var-}"
+
+	if [ -z "$options" ]; then
+		local completion_helper
+		if [ "${GIT_COMPLETION_SHOW_ALL-}" = "1" ]; then
+			completion_helper="--git-completion-helper-all"
+		else
+			completion_helper="--git-completion-helper"
+		fi
+		# leading and trailing spaces are significant to make
+		# option removal work correctly.
+		options=" $incl $(__git ${cmd/_/ } $completion_helper) " || return
+
+		for i in $excl; do
+			options="${options/ $i / }"
+		done
+		eval "$var=\"$options\""
+	fi
+
+	__gitcomp "$options"
+}
+
+# Variation of __gitcomp_nl () that appends to the existing list of
+# completion candidates, COMPREPLY.
+__gitcomp_nl_append ()
+{
+	local IFS=$'\n'
+	__gitcompappend "$1" "${2-}" "${3-$cur}" "${4- }"
+}
+
+# Generates completion reply from newline-separated possible completion words
+# by appending a space to all of them.
+# It accepts 1 to 4 arguments:
+# 1: List of possible completion words, separated by a single newline.
+# 2: A prefix to be added to each possible completion word (optional).
+# 3: Generate possible completion matches for this word (optional).
+# 4: A suffix to be appended to each possible completion word instead of
+#    the default space (optional).  If specified but empty, nothing is
+#    appended.
+__gitcomp_nl ()
+{
+	COMPREPLY=()
+	__gitcomp_nl_append "$@"
+}
+
+# Fills the COMPREPLY array with prefiltered paths without any additional
+# processing.
+# Callers must take care of providing only paths that match the current path
+# to be completed and adding any prefix path components, if necessary.
+# 1: List of newline-separated matching paths, complete with all prefix
+#    path components.
+__gitcomp_file_direct ()
+{
+	local IFS=$'\n'
+
+	COMPREPLY=($1)
+
+	# use a hack to enable file mode in bash < 4
+	compopt -o filenames +o nospace 2>/dev/null ||
+	compgen -f /non-existing-dir/ >/dev/null ||
+	true
+}
+
+# Generates completion reply with compgen from newline-separated possible
+# completion filenames.
+# It accepts 1 to 3 arguments:
+# 1: List of possible completion filenames, separated by a single newline.
+# 2: A directory prefix to be added to each possible completion filename
+#    (optional).
+# 3: Generate possible completion matches for this word (optional).
+__gitcomp_file ()
+{
+	local IFS=$'\n'
+
+	# XXX does not work when the directory prefix contains a tilde,
+	# since tilde expansion is not applied.
+	# This means that COMPREPLY will be empty and Bash default
+	# completion will be used.
+	__gitcompadd "$1" "${2-}" "${3-$cur}" ""
+
+	# use a hack to enable file mode in bash < 4
+	compopt -o filenames +o nospace 2>/dev/null ||
+	compgen -f /non-existing-dir/ >/dev/null ||
+	true
+}
+
+# Execute 'git ls-files', unless the --committable option is specified, in
+# which case it runs 'git diff-index' to find out the files that can be
+# committed.  It return paths relative to the directory specified in the first
+# argument, and using the options specified in the second argument.
+__git_ls_files_helper ()
+{
+	if [ "$2" = "--committable" ]; then
+		__git -C "$1" -c core.quotePath=false diff-index \
+			--name-only --relative HEAD -- "${3//\\/\\\\}*"
+	else
+		# NOTE: $2 is not quoted in order to support multiple options
+		__git -C "$1" -c core.quotePath=false ls-files \
+			--exclude-standard $2 -- "${3//\\/\\\\}*"
+	fi
+}
+
+
+# __git_index_files accepts 1 or 2 arguments:
+# 1: Options to pass to ls-files (required).
+# 2: A directory path (optional).
+#    If provided, only files within the specified directory are listed.
+#    Sub directories are never recursed.  Path must have a trailing
+#    slash.
+# 3: List only paths matching this path component (optional).
+__git_index_files ()
+{
+	local root="$2" match="$3"
+
+	__git_ls_files_helper "$root" "$1" "${match:-?}" |
+	awk -F / -v pfx="${2//\\/\\\\}" '{
+		paths[$1] = 1
+	}
+	END {
+		for (p in paths) {
+			if (substr(p, 1, 1) != "\"") {
+				# No special characters, easy!
+				print pfx p
+				continue
+			}
+
+			# The path is quoted.
+			p = dequote(p)
+			if (p == "")
+				continue
+
+			# Even when a directory name itself does not contain
+			# any special characters, it will still be quoted if
+			# any of its (stripped) trailing path components do.
+			# Because of this we may have seen the same directory
+			# both quoted and unquoted.
+			if (p in paths)
+				# We have seen the same directory unquoted,
+				# skip it.
+				continue
+			else
+				print pfx p
+		}
+	}
+	function dequote(p,    bs_idx, out, esc, esc_idx, dec) {
+		# Skip opening double quote.
+		p = substr(p, 2)
+
+		# Interpret backslash escape sequences.
+		while ((bs_idx = index(p, "\\")) != 0) {
+			out = out substr(p, 1, bs_idx - 1)
+			esc = substr(p, bs_idx + 1, 1)
+			p = substr(p, bs_idx + 2)
+
+			if ((esc_idx = index("abtvfr\"\\", esc)) != 0) {
+				# C-style one-character escape sequence.
+				out = out substr("\a\b\t\v\f\r\"\\",
+						 esc_idx, 1)
+			} else if (esc == "n") {
+				# Uh-oh, a newline character.
+				# We cannot reliably put a pathname
+				# containing a newline into COMPREPLY,
+				# and the newline would create a mess.
+				# Skip this path.
+				return ""
+			} else {
+				# Must be a \nnn octal value, then.
+				dec = esc             * 64 + \
+				      substr(p, 1, 1) * 8  + \
+				      substr(p, 2, 1)
+				out = out sprintf("%c", dec)
+				p = substr(p, 3)
+			}
+		}
+		# Drop closing double quote, if there is one.
+		# (There is not any if this is a directory, as it was
+		# already stripped with the trailing path components.)
+		if (substr(p, length(p), 1) == "\"")
+			out = out substr(p, 1, length(p) - 1)
+		else
+			out = out p
+
+		return out
+	}'
+}
+
+# __git_complete_index_file requires 1 argument:
+# 1: the options to pass to ls-file
+#
+# The exception is --committable, which finds the files appropriate commit.
+__git_complete_index_file ()
+{
+	local dequoted_word pfx="" cur_
+
+	__git_dequote "$cur"
+
+	case "$dequoted_word" in
+	?*/*)
+		pfx="${dequoted_word%/*}/"
+		cur_="${dequoted_word##*/}"
+		;;
+	*)
+		cur_="$dequoted_word"
+	esac
+
+	__gitcomp_file_direct "$(__git_index_files "$1" "$pfx" "$cur_")"
+}
+
+# Lists branches from the local repository.
+# 1: A prefix to be added to each listed branch (optional).
+# 2: List only branches matching this word (optional; list all branches if
+#    unset or empty).
+# 3: A suffix to be appended to each listed branch (optional).
+__git_heads ()
+{
+	local pfx="${1-}" cur_="${2-}" sfx="${3-}"
+
+	__git for-each-ref --format="${pfx//\%/%%}%(refname:strip=2)$sfx" \
+			${GIT_COMPLETION_IGNORE_CASE+--ignore-case} \
+			"refs/heads/$cur_*" "refs/heads/$cur_*/**"
+}
+
+# Lists branches from remote repositories.
+# 1: A prefix to be added to each listed branch (optional).
+# 2: List only branches matching this word (optional; list all branches if
+#    unset or empty).
+# 3: A suffix to be appended to each listed branch (optional).
+__git_remote_heads ()
+{
+	local pfx="${1-}" cur_="${2-}" sfx="${3-}"
+
+	__git for-each-ref --format="${pfx//\%/%%}%(refname:strip=2)$sfx" \
+			${GIT_COMPLETION_IGNORE_CASE+--ignore-case} \
+			"refs/remotes/$cur_*" "refs/remotes/$cur_*/**"
+}
+
+# Lists tags from the local repository.
+# Accepts the same positional parameters as __git_heads() above.
+__git_tags ()
+{
+	local pfx="${1-}" cur_="${2-}" sfx="${3-}"
+
+	__git for-each-ref --format="${pfx//\%/%%}%(refname:strip=2)$sfx" \
+			${GIT_COMPLETION_IGNORE_CASE+--ignore-case} \
+			"refs/tags/$cur_*" "refs/tags/$cur_*/**"
+}
+
+# List unique branches from refs/remotes used for 'git checkout' and 'git
+# switch' tracking DWIMery.
+# 1: A prefix to be added to each listed branch (optional)
+# 2: List only branches matching this word (optional; list all branches if
+#    unset or empty).
+# 3: A suffix to be appended to each listed branch (optional).
+__git_dwim_remote_heads ()
+{
+	local pfx="${1-}" cur_="${2-}" sfx="${3-}"
+	local fer_pfx="${pfx//\%/%%}" # "escape" for-each-ref format specifiers
+
+	# employ the heuristic used by git checkout and git switch
+	# Try to find a remote branch that cur_es the completion word
+	# but only output if the branch name is unique
+	__git for-each-ref --format="$fer_pfx%(refname:strip=3)$sfx" \
+		--sort="refname:strip=3" \
+		${GIT_COMPLETION_IGNORE_CASE+--ignore-case} \
+		"refs/remotes/*/$cur_*" "refs/remotes/*/$cur_*/**" | \
+	uniq -u
+}
+
+# Lists refs from the local (by default) or from a remote repository.
+# It accepts 0, 1 or 2 arguments:
+# 1: The remote to list refs from (optional; ignored, if set but empty).
+#    Can be the name of a configured remote, a path, or a URL.
+# 2: In addition to local refs, list unique branches from refs/remotes/ for
+#    'git checkout's tracking DWIMery (optional; ignored, if set but empty).
+# 3: A prefix to be added to each listed ref (optional).
+# 4: List only refs matching this word (optional; list all refs if unset or
+#    empty).
+# 5: A suffix to be appended to each listed ref (optional; ignored, if set
+#    but empty).
+#
+# Use __git_complete_refs() instead.
+__git_refs ()
+{
+	local i hash dir track="${2-}"
+	local list_refs_from=path remote="${1-}"
+	local format refs
+	local pfx="${3-}" cur_="${4-$cur}" sfx="${5-}"
+	local match="${4-}"
+	local umatch="${4-}"
+	local fer_pfx="${pfx//\%/%%}" # "escape" for-each-ref format specifiers
+
+	__git_find_repo_path
+	dir="$__git_repo_path"
+
+	if [ -z "$remote" ]; then
+		if [ -z "$dir" ]; then
+			return
+		fi
+	else
+		if __git_is_configured_remote "$remote"; then
+			# configured remote takes precedence over a
+			# local directory with the same name
+			list_refs_from=remote
+		elif [ -d "$remote/.git" ]; then
+			dir="$remote/.git"
+		elif [ -d "$remote" ]; then
+			dir="$remote"
+		else
+			list_refs_from=url
+		fi
+	fi
+
+	if test "${GIT_COMPLETION_IGNORE_CASE:+1}" = "1"
+	then
+		# uppercase with tr instead of ${match,^^} for bash 3.2 compatibility
+		umatch=$(echo "$match" | tr a-z A-Z 2>/dev/null || echo "$match")
+	fi
+
+	if [ "$list_refs_from" = path ]; then
+		if [[ "$cur_" == ^* ]]; then
+			pfx="$pfx^"
+			fer_pfx="$fer_pfx^"
+			cur_=${cur_#^}
+			match=${match#^}
+			umatch=${umatch#^}
+		fi
+		case "$cur_" in
+		refs|refs/*)
+			format="refname"
+			refs=("$match*" "$match*/**")
+			track=""
+			;;
+		*)
+			for i in HEAD FETCH_HEAD ORIG_HEAD MERGE_HEAD REBASE_HEAD CHERRY_PICK_HEAD REVERT_HEAD BISECT_HEAD AUTO_MERGE; do
+				case "$i" in
+				$match*|$umatch*)
+					if [ -e "$dir/$i" ]; then
+						echo "$pfx$i$sfx"
+					fi
+					;;
+				esac
+			done
+			format="refname:strip=2"
+			refs=("refs/tags/$match*" "refs/tags/$match*/**"
+				"refs/heads/$match*" "refs/heads/$match*/**"
+				"refs/remotes/$match*" "refs/remotes/$match*/**")
+			;;
+		esac
+		__git_dir="$dir" __git for-each-ref --format="$fer_pfx%($format)$sfx" \
+			${GIT_COMPLETION_IGNORE_CASE+--ignore-case} \
+			"${refs[@]}"
+		if [ -n "$track" ]; then
+			__git_dwim_remote_heads "$pfx" "$match" "$sfx"
+		fi
+		return
+	fi
+	case "$cur_" in
+	refs|refs/*)
+		__git ls-remote "$remote" "$match*" | \
+		while read -r hash i; do
+			case "$i" in
+			*^{}) ;;
+			*) echo "$pfx$i$sfx" ;;
+			esac
+		done
+		;;
+	*)
+		if [ "$list_refs_from" = remote ]; then
+			case "HEAD" in
+			$match*|$umatch*)	echo "${pfx}HEAD$sfx" ;;
+			esac
+			__git for-each-ref --format="$fer_pfx%(refname:strip=3)$sfx" \
+				${GIT_COMPLETION_IGNORE_CASE+--ignore-case} \
+				"refs/remotes/$remote/$match*" \
+				"refs/remotes/$remote/$match*/**"
+		else
+			local query_symref
+			case "HEAD" in
+			$match*|$umatch*)	query_symref="HEAD" ;;
+			esac
+			__git ls-remote "$remote" $query_symref \
+				"refs/tags/$match*" "refs/heads/$match*" \
+				"refs/remotes/$match*" |
+			while read -r hash i; do
+				case "$i" in
+				*^{})	;;
+				refs/*)	echo "$pfx${i#refs/*/}$sfx" ;;
+				*)	echo "$pfx$i$sfx" ;;  # symbolic refs
+				esac
+			done
+		fi
+		;;
+	esac
+}
+
+# Completes refs, short and long, local and remote, symbolic and pseudo.
+#
+# Usage: __git_complete_refs [<option>]...
+# --remote=<remote>: The remote to list refs from, can be the name of a
+#                    configured remote, a path, or a URL.
+# --dwim: List unique remote branches for 'git switch's tracking DWIMery.
+# --pfx=<prefix>: A prefix to be added to each ref.
+# --cur=<word>: The current ref to be completed.  Defaults to the current
+#               word to be completed.
+# --sfx=<suffix>: A suffix to be appended to each ref instead of the default
+#                 space.
+# --mode=<mode>: What set of refs to complete, one of 'refs' (the default) to
+#                complete all refs, 'heads' to complete only branches, or
+#                'remote-heads' to complete only remote branches. Note that
+#                --remote is only compatible with --mode=refs.
+__git_complete_refs ()
+{
+	local remote= dwim= pfx= cur_="$cur" sfx=" " mode="refs"
+
+	while test $# != 0; do
+		case "$1" in
+		--remote=*)	remote="${1##--remote=}" ;;
+		--dwim)		dwim="yes" ;;
+		# --track is an old spelling of --dwim
+		--track)	dwim="yes" ;;
+		--pfx=*)	pfx="${1##--pfx=}" ;;
+		--cur=*)	cur_="${1##--cur=}" ;;
+		--sfx=*)	sfx="${1##--sfx=}" ;;
+		--mode=*)	mode="${1##--mode=}" ;;
+		*)		return 1 ;;
+		esac
+		shift
+	done
+
+	# complete references based on the specified mode
+	case "$mode" in
+		refs)
+			__gitcomp_direct "$(__git_refs "$remote" "" "$pfx" "$cur_" "$sfx")" ;;
+		heads)
+			__gitcomp_direct "$(__git_heads "$pfx" "$cur_" "$sfx")" ;;
+		remote-heads)
+			__gitcomp_direct "$(__git_remote_heads "$pfx" "$cur_" "$sfx")" ;;
+		*)
+			return 1 ;;
+	esac
+
+	# Append DWIM remote branch names if requested
+	if [ "$dwim" = "yes" ]; then
+		__gitcomp_direct_append "$(__git_dwim_remote_heads "$pfx" "$cur_" "$sfx")"
+	fi
+}
+
+# __git_refs2 requires 1 argument (to pass to __git_refs)
+# Deprecated: use __git_complete_fetch_refspecs() instead.
+__git_refs2 ()
+{
+	local i
+	for i in $(__git_refs "$1"); do
+		echo "$i:$i"
+	done
+}
+
+# Completes refspecs for fetching from a remote repository.
+# 1: The remote repository.
+# 2: A prefix to be added to each listed refspec (optional).
+# 3: The ref to be completed as a refspec instead of the current word to be
+#    completed (optional)
+# 4: A suffix to be appended to each listed refspec instead of the default
+#    space (optional).
+__git_complete_fetch_refspecs ()
+{
+	local i remote="$1" pfx="${2-}" cur_="${3-$cur}" sfx="${4- }"
+
+	__gitcomp_direct "$(
+		for i in $(__git_refs "$remote" "" "" "$cur_") ; do
+			echo "$pfx$i:$i$sfx"
+		done
+		)"
+}
+
+# __git_refs_remotes requires 1 argument (to pass to ls-remote)
+__git_refs_remotes ()
+{
+	local i hash
+	__git ls-remote "$1" 'refs/heads/*' | \
+	while read -r hash i; do
+		echo "$i:refs/remotes/$1/${i#refs/heads/}"
+	done
+}
+
+__git_remotes ()
+{
+	__git_find_repo_path
+	test -d "$__git_repo_path/remotes" && ls -1 "$__git_repo_path/remotes"
+	__git remote
+}
+
+# Returns true if $1 matches the name of a configured remote, false otherwise.
+__git_is_configured_remote ()
+{
+	local remote
+	for remote in $(__git_remotes); do
+		if [ "$remote" = "$1" ]; then
+			return 0
+		fi
+	done
+	return 1
+}
+
+__git_list_merge_strategies ()
+{
+	LANG=C LC_ALL=C git merge -s help 2>&1 |
+	sed -n -e '/[Aa]vailable strategies are: /,/^$/{
+		s/\.$//
+		s/.*://
+		s/^[ 	]*//
+		s/[ 	]*$//
+		p
+	}'
+}
+
+__git_merge_strategies=
+# 'git merge -s help' (and thus detection of the merge strategy
+# list) fails, unfortunately, if run outside of any git working
+# tree.  __git_merge_strategies is set to the empty string in
+# that case, and the detection will be repeated the next time it
+# is needed.
+__git_compute_merge_strategies ()
+{
+	test -n "$__git_merge_strategies" ||
+	__git_merge_strategies=$(__git_list_merge_strategies)
+}
+
+__git_merge_strategy_options="ours theirs subtree subtree= patience
+	histogram diff-algorithm= ignore-space-change ignore-all-space
+	ignore-space-at-eol renormalize no-renormalize no-renames
+	find-renames find-renames= rename-threshold="
+
+__git_complete_revlist_file ()
+{
+	local dequoted_word pfx ls ref cur_="$cur"
+	case "$cur_" in
+	*..?*:*)
+		return
+		;;
+	?*:*)
+		ref="${cur_%%:*}"
+		cur_="${cur_#*:}"
+
+		__git_dequote "$cur_"
+
+		case "$dequoted_word" in
+		?*/*)
+			pfx="${dequoted_word%/*}"
+			cur_="${dequoted_word##*/}"
+			ls="$ref:$pfx"
+			pfx="$pfx/"
+			;;
+		*)
+			cur_="$dequoted_word"
+			ls="$ref"
+			;;
+		esac
+
+		case "$COMP_WORDBREAKS" in
+		*:*) : great ;;
+		*)   pfx="$ref:$pfx" ;;
+		esac
+
+		__gitcomp_file "$(__git ls-tree "$ls" \
+				| sed 's/^.*	//
+				       s/$//')" \
+			"$pfx" "$cur_"
+		;;
+	*...*)
+		pfx="${cur_%...*}..."
+		cur_="${cur_#*...}"
+		__git_complete_refs --pfx="$pfx" --cur="$cur_"
+		;;
+	*..*)
+		pfx="${cur_%..*}.."
+		cur_="${cur_#*..}"
+		__git_complete_refs --pfx="$pfx" --cur="$cur_"
+		;;
+	*)
+		__git_complete_refs
+		;;
+	esac
+}
+
+__git_complete_file ()
+{
+	__git_complete_revlist_file
+}
+
+__git_complete_revlist ()
+{
+	__git_complete_revlist_file
+}
+
+__git_complete_remote_or_refspec ()
+{
+	local cur_="$cur" cmd="${words[__git_cmd_idx]}"
+	local i c=$((__git_cmd_idx+1)) remote="" pfx="" lhs=1 no_complete_refspec=0
+	if [ "$cmd" = "remote" ]; then
+		((c++))
+	fi
+	while [ $c -lt $cword ]; do
+		i="${words[c]}"
+		case "$i" in
+		--mirror) [ "$cmd" = "push" ] && no_complete_refspec=1 ;;
+		-d|--delete) [ "$cmd" = "push" ] && lhs=0 ;;
+		--all)
+			case "$cmd" in
+			push) no_complete_refspec=1 ;;
+			fetch)
+				return
+				;;
+			*) ;;
+			esac
+			;;
+		--multiple) no_complete_refspec=1; break ;;
+		-*) ;;
+		*) remote="$i"; break ;;
+		esac
+		((c++))
+	done
+	if [ -z "$remote" ]; then
+		__gitcomp_nl "$(__git_remotes)"
+		return
+	fi
+	if [ $no_complete_refspec = 1 ]; then
+		return
+	fi
+	[ "$remote" = "." ] && remote=
+	case "$cur_" in
+	*:*)
+		case "$COMP_WORDBREAKS" in
+		*:*) : great ;;
+		*)   pfx="${cur_%%:*}:" ;;
+		esac
+		cur_="${cur_#*:}"
+		lhs=0
+		;;
+	+*)
+		pfx="+"
+		cur_="${cur_#+}"
+		;;
+	esac
+	case "$cmd" in
+	fetch)
+		if [ $lhs = 1 ]; then
+			__git_complete_fetch_refspecs "$remote" "$pfx" "$cur_"
+		else
+			__git_complete_refs --pfx="$pfx" --cur="$cur_"
+		fi
+		;;
+	pull|remote)
+		if [ $lhs = 1 ]; then
+			__git_complete_refs --remote="$remote" --pfx="$pfx" --cur="$cur_"
+		else
+			__git_complete_refs --pfx="$pfx" --cur="$cur_"
+		fi
+		;;
+	push)
+		if [ $lhs = 1 ]; then
+			__git_complete_refs --pfx="$pfx" --cur="$cur_"
+		else
+			__git_complete_refs --remote="$remote" --pfx="$pfx" --cur="$cur_"
+		fi
+		;;
+	esac
+}
+
+__git_complete_strategy ()
+{
+	__git_compute_merge_strategies
+	case "$prev" in
+	-s|--strategy)
+		__gitcomp "$__git_merge_strategies"
+		return 0
+		;;
+	-X)
+		__gitcomp "$__git_merge_strategy_options"
+		return 0
+		;;
+	esac
+	case "$cur" in
+	--strategy=*)
+		__gitcomp "$__git_merge_strategies" "" "${cur##--strategy=}"
+		return 0
+		;;
+	--strategy-option=*)
+		__gitcomp "$__git_merge_strategy_options" "" "${cur##--strategy-option=}"
+		return 0
+		;;
+	esac
+	return 1
+}
+
+__git_all_commands=
+__git_compute_all_commands ()
+{
+	test -n "$__git_all_commands" ||
+	__git_all_commands=$(__git --list-cmds=main,others,alias,nohelpers)
+}
+
+# Lists all set config variables starting with the given section prefix,
+# with the prefix removed.
+__git_get_config_variables ()
+{
+	local section="$1" i IFS=$'\n'
+	for i in $(__git config --name-only --get-regexp "^$section\..*"); do
+		echo "${i#$section.}"
+	done
+}
+
+__git_pretty_aliases ()
+{
+	__git_get_config_variables "pretty"
+}
+
+# __git_aliased_command requires 1 argument
+__git_aliased_command ()
+{
+	local cur=$1 last list= word cmdline
+
+	while [[ -n "$cur" ]]; do
+		if [[ "$list" == *" $cur "* ]]; then
+			# loop detected
+			return
+		fi
+
+		cmdline=$(__git config --get "alias.$cur")
+		list=" $cur $list"
+		last=$cur
+		cur=
+
+		for word in $cmdline; do
+			case "$word" in
+			\!gitk|gitk)
+				cur="gitk"
+				break
+				;;
+			\!*)	: shell command alias ;;
+			-*)	: option ;;
+			*=*)	: setting env ;;
+			git)	: git itself ;;
+			\(\))   : skip parens of shell function definition ;;
+			{)	: skip start of shell helper function ;;
+			:)	: skip null command ;;
+			\'*)	: skip opening quote after sh -c ;;
+			*)
+				cur="${word%;}"
+				break
+			esac
+		done
+	done
+
+	cur=$last
+	if [[ "$cur" != "$1" ]]; then
+		echo "$cur"
+	fi
+}
+
+# Check whether one of the given words is present on the command line,
+# and print the first word found.
+#
+# Usage: __git_find_on_cmdline [<option>]... "<wordlist>"
+# --show-idx: Optionally show the index of the found word in the $words array.
+__git_find_on_cmdline ()
+{
+	local word c="$__git_cmd_idx" show_idx
+
+	while test $# -gt 1; do
+		case "$1" in
+		--show-idx)	show_idx=y ;;
+		*)		return 1 ;;
+		esac
+		shift
+	done
+	local wordlist="$1"
+
+	while [ $c -lt $cword ]; do
+		for word in $wordlist; do
+			if [ "$word" = "${words[c]}" ]; then
+				if [ -n "${show_idx-}" ]; then
+					echo "$c $word"
+				else
+					echo "$word"
+				fi
+				return
+			fi
+		done
+		((c++))
+	done
+}
+
+# Similar to __git_find_on_cmdline, except that it loops backwards and thus
+# prints the *last* word found. Useful for finding which of two options that
+# supersede each other came last, such as "--guess" and "--no-guess".
+#
+# Usage: __git_find_last_on_cmdline [<option>]... "<wordlist>"
+# --show-idx: Optionally show the index of the found word in the $words array.
+__git_find_last_on_cmdline ()
+{
+	local word c=$cword show_idx
+
+	while test $# -gt 1; do
+		case "$1" in
+		--show-idx)	show_idx=y ;;
+		*)		return 1 ;;
+		esac
+		shift
+	done
+	local wordlist="$1"
+
+	while [ $c -gt "$__git_cmd_idx" ]; do
+		((c--))
+		for word in $wordlist; do
+			if [ "$word" = "${words[c]}" ]; then
+				if [ -n "$show_idx" ]; then
+					echo "$c $word"
+				else
+					echo "$word"
+				fi
+				return
+			fi
+		done
+	done
+}
+
+# Echo the value of an option set on the command line or config
+#
+# $1: short option name
+# $2: long option name including =
+# $3: list of possible values
+# $4: config string (optional)
+#
+# example:
+# result="$(__git_get_option_value "-d" "--do-something=" \
+#     "yes no" "core.doSomething")"
+#
+# result is then either empty (no option set) or "yes" or "no"
+#
+# __git_get_option_value requires 3 arguments
+__git_get_option_value ()
+{
+	local c short_opt long_opt val
+	local result= values config_key word
+
+	short_opt="$1"
+	long_opt="$2"
+	values="$3"
+	config_key="$4"
+
+	((c = $cword - 1))
+	while [ $c -ge 0 ]; do
+		word="${words[c]}"
+		for val in $values; do
+			if [ "$short_opt$val" = "$word" ] ||
+			   [ "$long_opt$val"  = "$word" ]; then
+				result="$val"
+				break 2
+			fi
+		done
+		((c--))
+	done
+
+	if [ -n "$config_key" ] && [ -z "$result" ]; then
+		result="$(__git config "$config_key")"
+	fi
+
+	echo "$result"
+}
+
+__git_has_doubledash ()
+{
+	local c=1
+	while [ $c -lt $cword ]; do
+		if [ "--" = "${words[c]}" ]; then
+			return 0
+		fi
+		((c++))
+	done
+	return 1
+}
+
+# Try to count non option arguments passed on the command line for the
+# specified git command.
+# When options are used, it is necessary to use the special -- option to
+# tell the implementation were non option arguments begin.
+# XXX this can not be improved, since options can appear everywhere, as
+# an example:
+#	git mv x -n y
+#
+# __git_count_arguments requires 1 argument: the git command executed.
+__git_count_arguments ()
+{
+	local word i c=0
+
+	# Skip "git" (first argument)
+	for ((i=$__git_cmd_idx; i < ${#words[@]}; i++)); do
+		word="${words[i]}"
+
+		case "$word" in
+			--)
+				# Good; we can assume that the following are only non
+				# option arguments.
+				((c = 0))
+				;;
+			"$1")
+				# Skip the specified git command and discard git
+				# main options
+				((c = 0))
+				;;
+			?*)
+				((c++))
+				;;
+		esac
+	done
+
+	printf "%d" $c
+}
+
+__git_whitespacelist="nowarn warn error error-all fix"
+__git_patchformat="mbox stgit stgit-series hg mboxrd"
+__git_showcurrentpatch="diff raw"
+__git_am_inprogress_options="--skip --continue --resolved --abort --quit --show-current-patch"
+__git_quoted_cr="nowarn warn strip"
+
+_git_am ()
+{
+	__git_find_repo_path
+	if [ -d "$__git_repo_path"/rebase-apply ]; then
+		__gitcomp "$__git_am_inprogress_options"
+		return
+	fi
+	case "$cur" in
+	--whitespace=*)
+		__gitcomp "$__git_whitespacelist" "" "${cur##--whitespace=}"
+		return
+		;;
+	--patch-format=*)
+		__gitcomp "$__git_patchformat" "" "${cur##--patch-format=}"
+		return
+		;;
+	--show-current-patch=*)
+		__gitcomp "$__git_showcurrentpatch" "" "${cur##--show-current-patch=}"
+		return
+		;;
+	--quoted-cr=*)
+		__gitcomp "$__git_quoted_cr" "" "${cur##--quoted-cr=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin am "" \
+			"$__git_am_inprogress_options"
+		return
+	esac
+}
+
+_git_apply ()
+{
+	case "$cur" in
+	--whitespace=*)
+		__gitcomp "$__git_whitespacelist" "" "${cur##--whitespace=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin apply
+		return
+	esac
+}
+
+_git_add ()
+{
+	case "$cur" in
+	--chmod=*)
+		__gitcomp "+x -x" "" "${cur##--chmod=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin add
+		return
+	esac
+
+	local complete_opt="--others --modified --directory --no-empty-directory"
+	if test -n "$(__git_find_on_cmdline "-u --update")"
+	then
+		complete_opt="--modified"
+	fi
+	__git_complete_index_file "$complete_opt"
+}
+
+_git_archive ()
+{
+	case "$cur" in
+	--format=*)
+		__gitcomp "$(git archive --list)" "" "${cur##--format=}"
+		return
+		;;
+	--remote=*)
+		__gitcomp_nl "$(__git_remotes)" "" "${cur##--remote=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin archive "--format= --list --verbose --prefix= --worktree-attributes"
+		return
+		;;
+	esac
+	__git_complete_file
+}
+
+_git_bisect ()
+{
+	__git_has_doubledash && return
+
+	local subcommands="start bad good skip reset visualize replay log run"
+	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+	if [ -z "$subcommand" ]; then
+		__git_find_repo_path
+		if [ -f "$__git_repo_path"/BISECT_START ]; then
+			__gitcomp "$subcommands"
+		else
+			__gitcomp "replay start"
+		fi
+		return
+	fi
+
+	case "$subcommand" in
+	bad|good|reset|skip|start)
+		__git_complete_refs
+		;;
+	*)
+		;;
+	esac
+}
+
+__git_ref_fieldlist="refname objecttype objectsize objectname upstream push HEAD symref"
+
+_git_branch ()
+{
+	local i c="$__git_cmd_idx" only_local_ref="n" has_r="n"
+
+	while [ $c -lt $cword ]; do
+		i="${words[c]}"
+		case "$i" in
+		-d|-D|--delete|-m|-M|--move|-c|-C|--copy)
+			only_local_ref="y" ;;
+		-r|--remotes)
+			has_r="y" ;;
+		esac
+		((c++))
+	done
+
+	case "$cur" in
+	--set-upstream-to=*)
+		__git_complete_refs --cur="${cur##--set-upstream-to=}"
+		;;
+	--*)
+		__gitcomp_builtin branch
+		;;
+	*)
+		if [ $only_local_ref = "y" -a $has_r = "n" ]; then
+			__gitcomp_direct "$(__git_heads "" "$cur" " ")"
+		else
+			__git_complete_refs
+		fi
+		;;
+	esac
+}
+
+_git_bundle ()
+{
+	local cmd="${words[__git_cmd_idx+1]}"
+	case "$cword" in
+	$((__git_cmd_idx+1)))
+		__gitcomp "create list-heads verify unbundle"
+		;;
+	$((__git_cmd_idx+2)))
+		# looking for a file
+		;;
+	*)
+		case "$cmd" in
+			create)
+				__git_complete_revlist
+			;;
+		esac
+		;;
+	esac
+}
+
+# Helper function to decide whether or not we should enable DWIM logic for
+# git-switch and git-checkout.
+#
+# To decide between the following rules in decreasing priority order:
+# - the last provided of "--guess" or "--no-guess" explicitly enable or
+#   disable completion of DWIM logic respectively.
+# - If checkout.guess is false, disable completion of DWIM logic.
+# - If the --no-track option is provided, take this as a hint to disable the
+#   DWIM completion logic
+# - If GIT_COMPLETION_CHECKOUT_NO_GUESS is set, disable the DWIM completion
+#   logic, as requested by the user.
+# - Enable DWIM logic otherwise.
+#
+__git_checkout_default_dwim_mode ()
+{
+	local last_option dwim_opt="--dwim"
+
+	if [ "${GIT_COMPLETION_CHECKOUT_NO_GUESS-}" = "1" ]; then
+		dwim_opt=""
+	fi
+
+	# --no-track disables DWIM, but with lower priority than
+	# --guess/--no-guess/checkout.guess
+	if [ -n "$(__git_find_on_cmdline "--no-track")" ]; then
+		dwim_opt=""
+	fi
+
+	# checkout.guess = false disables DWIM, but with lower priority than
+	# --guess/--no-guess
+	if [ "$(__git config --type=bool checkout.guess)" = "false" ]; then
+		dwim_opt=""
+	fi
+
+	# Find the last provided --guess or --no-guess
+	last_option="$(__git_find_last_on_cmdline "--guess --no-guess")"
+	case "$last_option" in
+		--guess)
+			dwim_opt="--dwim"
+			;;
+		--no-guess)
+			dwim_opt=""
+			;;
+	esac
+
+	echo "$dwim_opt"
+}
+
+_git_checkout ()
+{
+	__git_has_doubledash && return
+
+	local dwim_opt="$(__git_checkout_default_dwim_mode)"
+
+	case "$prev" in
+	-b|-B|--orphan)
+		# Complete local branches (and DWIM branch
+		# remote branch names) for an option argument
+		# specifying a new branch name. This is for
+		# convenience, assuming new branches are
+		# possibly based on pre-existing branch names.
+		__git_complete_refs $dwim_opt --mode="heads"
+		return
+		;;
+	*)
+		;;
+	esac
+
+	case "$cur" in
+	--conflict=*)
+		__gitcomp "diff3 merge zdiff3" "" "${cur##--conflict=}"
+		;;
+	--*)
+		__gitcomp_builtin checkout
+		;;
+	*)
+		# At this point, we've already handled special completion for
+		# the arguments to -b/-B, and --orphan. There are 3 main
+		# things left we can possibly complete:
+		# 1) a start-point for -b/-B, -d/--detach, or --orphan
+		# 2) a remote head, for --track
+		# 3) an arbitrary reference, possibly including DWIM names
+		#
+
+		if [ -n "$(__git_find_on_cmdline "-b -B -d --detach --orphan")" ]; then
+			__git_complete_refs --mode="refs"
+		elif [ -n "$(__git_find_on_cmdline "-t --track")" ]; then
+			__git_complete_refs --mode="remote-heads"
+		else
+			__git_complete_refs $dwim_opt --mode="refs"
+		fi
+		;;
+	esac
+}
+
+__git_sequencer_inprogress_options="--continue --quit --abort --skip"
+
+__git_cherry_pick_inprogress_options=$__git_sequencer_inprogress_options
+
+_git_cherry_pick ()
+{
+	__git_find_repo_path
+	if [ -f "$__git_repo_path"/CHERRY_PICK_HEAD ]; then
+		__gitcomp "$__git_cherry_pick_inprogress_options"
+		return
+	fi
+
+	__git_complete_strategy && return
+
+	case "$cur" in
+	--*)
+		__gitcomp_builtin cherry-pick "" \
+			"$__git_cherry_pick_inprogress_options"
+		;;
+	*)
+		__git_complete_refs
+		;;
+	esac
+}
+
+_git_clean ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin clean
+		return
+		;;
+	esac
+
+	# XXX should we check for -x option ?
+	__git_complete_index_file "--others --directory"
+}
+
+_git_clone ()
+{
+	case "$prev" in
+	-c|--config)
+		__git_complete_config_variable_name_and_value
+		return
+		;;
+	esac
+	case "$cur" in
+	--config=*)
+		__git_complete_config_variable_name_and_value \
+			--cur="${cur##--config=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin clone
+		return
+		;;
+	esac
+}
+
+__git_untracked_file_modes="all no normal"
+
+__git_trailer_tokens ()
+{
+	__git config --name-only --get-regexp '^trailer\..*\.key$' | cut -d. -f 2- | rev | cut -d. -f2- | rev
+}
+
+_git_commit ()
+{
+	case "$prev" in
+	-c|-C)
+		__git_complete_refs
+		return
+		;;
+	esac
+
+	case "$cur" in
+	--cleanup=*)
+		__gitcomp "default scissors strip verbatim whitespace
+			" "" "${cur##--cleanup=}"
+		return
+		;;
+	--reuse-message=*|--reedit-message=*|\
+	--fixup=*|--squash=*)
+		__git_complete_refs --cur="${cur#*=}"
+		return
+		;;
+	--untracked-files=*)
+		__gitcomp "$__git_untracked_file_modes" "" "${cur##--untracked-files=}"
+		return
+		;;
+	--trailer=*)
+		__gitcomp_nl "$(__git_trailer_tokens)" "" "${cur##--trailer=}" ":"
+		return
+		;;
+	--*)
+		__gitcomp_builtin commit
+		return
+	esac
+
+	if __git rev-parse --verify --quiet HEAD >/dev/null; then
+		__git_complete_index_file "--committable"
+	else
+		# This is the first commit
+		__git_complete_index_file "--cached"
+	fi
+}
+
+_git_describe ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin describe
+		return
+	esac
+	__git_complete_refs
+}
+
+__git_diff_algorithms="myers minimal patience histogram"
+
+__git_diff_submodule_formats="diff log short"
+
+__git_color_moved_opts="no default plain blocks zebra dimmed-zebra"
+
+__git_color_moved_ws_opts="no ignore-space-at-eol ignore-space-change
+			ignore-all-space allow-indentation-change"
+
+__git_ws_error_highlight_opts="context old new all default"
+
+# Options for the diff machinery (diff, log, show, stash, range-diff, ...)
+__git_diff_common_options="--stat --numstat --shortstat --summary
+			--patch-with-stat --name-only --name-status --color
+			--no-color --color-words --no-renames --check
+			--color-moved --color-moved= --no-color-moved
+			--color-moved-ws= --no-color-moved-ws
+			--full-index --binary --abbrev --diff-filter=
+			--find-copies --find-object --find-renames
+			--no-relative --relative
+			--find-copies-harder --ignore-cr-at-eol
+			--text --ignore-space-at-eol --ignore-space-change
+			--ignore-all-space --ignore-blank-lines --exit-code
+			--quiet --ext-diff --no-ext-diff --unified=
+			--no-prefix --src-prefix= --dst-prefix=
+			--inter-hunk-context= --function-context
+			--patience --histogram --minimal
+			--raw --word-diff --word-diff-regex=
+			--dirstat --dirstat= --dirstat-by-file
+			--dirstat-by-file= --cumulative
+			--diff-algorithm= --default-prefix
+			--submodule --submodule= --ignore-submodules
+			--indent-heuristic --no-indent-heuristic
+			--textconv --no-textconv --break-rewrites
+			--patch --no-patch --cc --combined-all-paths
+			--anchored= --compact-summary --ignore-matching-lines=
+			--irreversible-delete --line-prefix --no-stat
+			--output= --output-indicator-context=
+			--output-indicator-new= --output-indicator-old=
+			--ws-error-highlight=
+			--pickaxe-all --pickaxe-regex
+"
+
+# Options for diff/difftool
+__git_diff_difftool_options="--cached --staged
+			--base --ours --theirs --no-index --merge-base
+			--ita-invisible-in-index --ita-visible-in-index
+			$__git_diff_common_options"
+
+_git_diff ()
+{
+	__git_has_doubledash && return
+
+	case "$cur" in
+	--diff-algorithm=*)
+		__gitcomp "$__git_diff_algorithms" "" "${cur##--diff-algorithm=}"
+		return
+		;;
+	--submodule=*)
+		__gitcomp "$__git_diff_submodule_formats" "" "${cur##--submodule=}"
+		return
+		;;
+	--color-moved=*)
+		__gitcomp "$__git_color_moved_opts" "" "${cur##--color-moved=}"
+		return
+		;;
+	--color-moved-ws=*)
+		__gitcomp "$__git_color_moved_ws_opts" "" "${cur##--color-moved-ws=}"
+		return
+		;;
+	--ws-error-highlight=*)
+		__gitcomp "$__git_ws_error_highlight_opts" "" "${cur##--ws-error-highlight=}"
+		return
+		;;
+	--*)
+		__gitcomp "$__git_diff_difftool_options"
+		return
+		;;
+	esac
+	__git_complete_revlist_file
+}
+
+__git_mergetools_common="diffuse diffmerge ecmerge emerge kdiff3 meld opendiff
+			tkdiff vimdiff nvimdiff gvimdiff xxdiff araxis p4merge
+			bc codecompare smerge
+"
+
+_git_difftool ()
+{
+	__git_has_doubledash && return
+
+	case "$cur" in
+	--tool=*)
+		__gitcomp "$__git_mergetools_common kompare" "" "${cur##--tool=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin difftool "$__git_diff_difftool_options"
+		return
+		;;
+	esac
+	__git_complete_revlist_file
+}
+
+__git_fetch_recurse_submodules="yes on-demand no"
+
+_git_fetch ()
+{
+	case "$cur" in
+	--recurse-submodules=*)
+		__gitcomp "$__git_fetch_recurse_submodules" "" "${cur##--recurse-submodules=}"
+		return
+		;;
+	--filter=*)
+		__gitcomp "blob:none blob:limit= sparse:oid=" "" "${cur##--filter=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin fetch
+		return
+		;;
+	esac
+	__git_complete_remote_or_refspec
+}
+
+__git_format_patch_extra_options="
+	--full-index --not --all --no-prefix --src-prefix=
+	--dst-prefix= --notes
+"
+
+_git_format_patch ()
+{
+	case "$cur" in
+	--thread=*)
+		__gitcomp "
+			deep shallow
+			" "" "${cur##--thread=}"
+		return
+		;;
+	--base=*|--interdiff=*|--range-diff=*)
+		__git_complete_refs --cur="${cur#--*=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin format-patch "$__git_format_patch_extra_options"
+		return
+		;;
+	esac
+	__git_complete_revlist
+}
+
+_git_fsck ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin fsck
+		return
+		;;
+	esac
+}
+
+_git_gitk ()
+{
+	__gitk_main
+}
+
+# Lists matching symbol names from a tag (as in ctags) file.
+# 1: List symbol names matching this word.
+# 2: The tag file to list symbol names from.
+# 3: A prefix to be added to each listed symbol name (optional).
+# 4: A suffix to be appended to each listed symbol name (optional).
+__git_match_ctag () {
+	awk -v pfx="${3-}" -v sfx="${4-}" "
+		/^${1//\//\\/}/ { print pfx \$1 sfx }
+		" "$2"
+}
+
+# Complete symbol names from a tag file.
+# Usage: __git_complete_symbol [<option>]...
+# --tags=<file>: The tag file to list symbol names from instead of the
+#                default "tags".
+# --pfx=<prefix>: A prefix to be added to each symbol name.
+# --cur=<word>: The current symbol name to be completed.  Defaults to
+#               the current word to be completed.
+# --sfx=<suffix>: A suffix to be appended to each symbol name instead
+#                 of the default space.
+__git_complete_symbol () {
+	local tags=tags pfx="" cur_="${cur-}" sfx=" "
+
+	while test $# != 0; do
+		case "$1" in
+		--tags=*)	tags="${1##--tags=}" ;;
+		--pfx=*)	pfx="${1##--pfx=}" ;;
+		--cur=*)	cur_="${1##--cur=}" ;;
+		--sfx=*)	sfx="${1##--sfx=}" ;;
+		*)		return 1 ;;
+		esac
+		shift
+	done
+
+	if test -r "$tags"; then
+		__gitcomp_direct "$(__git_match_ctag "$cur_" "$tags" "$pfx" "$sfx")"
+	fi
+}
+
+_git_grep ()
+{
+	__git_has_doubledash && return
+
+	case "$cur" in
+	--*)
+		__gitcomp_builtin grep
+		return
+		;;
+	esac
+
+	case "$cword,$prev" in
+	$((__git_cmd_idx+1)),*|*,-*)
+		__git_complete_symbol && return
+		;;
+	esac
+
+	__git_complete_refs
+}
+
+_git_help ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin help
+		return
+		;;
+	esac
+	if test -n "${GIT_TESTING_ALL_COMMAND_LIST-}"
+	then
+		__gitcomp "$GIT_TESTING_ALL_COMMAND_LIST $(__git --list-cmds=alias,list-guide) gitk"
+	else
+		__gitcomp "$(__git --list-cmds=main,nohelpers,alias,list-guide) gitk"
+	fi
+}
+
+_git_init ()
+{
+	case "$cur" in
+	--shared=*)
+		__gitcomp "
+			false true umask group all world everybody
+			" "" "${cur##--shared=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin init
+		return
+		;;
+	esac
+}
+
+_git_ls_files ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin ls-files
+		return
+		;;
+	esac
+
+	# XXX ignore options like --modified and always suggest all cached
+	# files.
+	__git_complete_index_file "--cached"
+}
+
+_git_ls_remote ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin ls-remote
+		return
+		;;
+	esac
+	__gitcomp_nl "$(__git_remotes)"
+}
+
+_git_ls_tree ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin ls-tree
+		return
+		;;
+	esac
+
+	__git_complete_file
+}
+
+# Options that go well for log, shortlog and gitk
+__git_log_common_options="
+	--not --all
+	--branches --tags --remotes
+	--first-parent --merges --no-merges
+	--max-count=
+	--max-age= --since= --after=
+	--min-age= --until= --before=
+	--min-parents= --max-parents=
+	--no-min-parents --no-max-parents
+"
+# Options that go well for log and gitk (not shortlog)
+__git_log_gitk_options="
+	--dense --sparse --full-history
+	--simplify-merges --simplify-by-decoration
+	--left-right --notes --no-notes
+"
+# Options that go well for log and shortlog (not gitk)
+__git_log_shortlog_options="
+	--author= --committer= --grep=
+	--all-match --invert-grep
+"
+# Options accepted by log and show
+__git_log_show_options="
+	--diff-merges --diff-merges= --no-diff-merges --dd --remerge-diff
+"
+
+__git_diff_merges_opts="off none on first-parent 1 separate m combined c dense-combined cc remerge r"
+
+__git_log_pretty_formats="oneline short medium full fuller reference email raw format: tformat: mboxrd"
+__git_log_date_formats="relative iso8601 iso8601-strict rfc2822 short local default human raw unix auto: format:"
+
+_git_log ()
+{
+	__git_has_doubledash && return
+	__git_find_repo_path
+
+	local merge=""
+	if [ -f "$__git_repo_path/MERGE_HEAD" ]; then
+		merge="--merge"
+	fi
+	case "$prev,$cur" in
+	-L,:*:*)
+		return	# fall back to Bash filename completion
+		;;
+	-L,:*)
+		__git_complete_symbol --cur="${cur#:}" --sfx=":"
+		return
+		;;
+	-G,*|-S,*)
+		__git_complete_symbol
+		return
+		;;
+	esac
+	case "$cur" in
+	--pretty=*|--format=*)
+		__gitcomp "$__git_log_pretty_formats $(__git_pretty_aliases)
+			" "" "${cur#*=}"
+		return
+		;;
+	--date=*)
+		__gitcomp "$__git_log_date_formats" "" "${cur##--date=}"
+		return
+		;;
+	--decorate=*)
+		__gitcomp "full short no" "" "${cur##--decorate=}"
+		return
+		;;
+	--diff-algorithm=*)
+		__gitcomp "$__git_diff_algorithms" "" "${cur##--diff-algorithm=}"
+		return
+		;;
+	--submodule=*)
+		__gitcomp "$__git_diff_submodule_formats" "" "${cur##--submodule=}"
+		return
+		;;
+	--ws-error-highlight=*)
+		__gitcomp "$__git_ws_error_highlight_opts" "" "${cur##--ws-error-highlight=}"
+		return
+		;;
+	--no-walk=*)
+		__gitcomp "sorted unsorted" "" "${cur##--no-walk=}"
+		return
+		;;
+	--diff-merges=*)
+                __gitcomp "$__git_diff_merges_opts" "" "${cur##--diff-merges=}"
+                return
+                ;;
+	--*)
+		__gitcomp "
+			$__git_log_common_options
+			$__git_log_shortlog_options
+			$__git_log_gitk_options
+			$__git_log_show_options
+			--root --topo-order --date-order --reverse
+			--follow --full-diff
+			--abbrev-commit --no-abbrev-commit --abbrev=
+			--relative-date --date=
+			--pretty= --format= --oneline
+			--show-signature
+			--cherry-mark
+			--cherry-pick
+			--graph
+			--decorate --decorate= --no-decorate
+			--walk-reflogs
+			--no-walk --no-walk= --do-walk
+			--parents --children
+			--expand-tabs --expand-tabs= --no-expand-tabs
+			$merge
+			$__git_diff_common_options
+			"
+		return
+		;;
+	-L:*:*)
+		return	# fall back to Bash filename completion
+		;;
+	-L:*)
+		__git_complete_symbol --cur="${cur#-L:}" --sfx=":"
+		return
+		;;
+	-G*)
+		__git_complete_symbol --pfx="-G" --cur="${cur#-G}"
+		return
+		;;
+	-S*)
+		__git_complete_symbol --pfx="-S" --cur="${cur#-S}"
+		return
+		;;
+	esac
+	__git_complete_revlist
+}
+
+_git_merge ()
+{
+	__git_complete_strategy && return
+
+	case "$cur" in
+	--*)
+		__gitcomp_builtin merge
+		return
+	esac
+	__git_complete_refs
+}
+
+_git_mergetool ()
+{
+	case "$cur" in
+	--tool=*)
+		__gitcomp "$__git_mergetools_common tortoisemerge" "" "${cur##--tool=}"
+		return
+		;;
+	--*)
+		__gitcomp "--tool= --prompt --no-prompt --gui --no-gui"
+		return
+		;;
+	esac
+}
+
+_git_merge_base ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin merge-base
+		return
+		;;
+	esac
+	__git_complete_refs
+}
+
+_git_mv ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin mv
+		return
+		;;
+	esac
+
+	if [ $(__git_count_arguments "mv") -gt 0 ]; then
+		# We need to show both cached and untracked files (including
+		# empty directories) since this may not be the last argument.
+		__git_complete_index_file "--cached --others --directory"
+	else
+		__git_complete_index_file "--cached"
+	fi
+}
+
+_git_notes ()
+{
+	local subcommands='add append copy edit get-ref list merge prune remove show'
+	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+
+	case "$subcommand,$cur" in
+	,--*)
+		__gitcomp_builtin notes
+		;;
+	,*)
+		case "$prev" in
+		--ref)
+			__git_complete_refs
+			;;
+		*)
+			__gitcomp "$subcommands --ref"
+			;;
+		esac
+		;;
+	*,--reuse-message=*|*,--reedit-message=*)
+		__git_complete_refs --cur="${cur#*=}"
+		;;
+	*,--*)
+		__gitcomp_builtin notes_$subcommand
+		;;
+	prune,*|get-ref,*)
+		# this command does not take a ref, do not complete it
+		;;
+	*)
+		case "$prev" in
+		-m|-F)
+			;;
+		*)
+			__git_complete_refs
+			;;
+		esac
+		;;
+	esac
+}
+
+_git_pull ()
+{
+	__git_complete_strategy && return
+
+	case "$cur" in
+	--recurse-submodules=*)
+		__gitcomp "$__git_fetch_recurse_submodules" "" "${cur##--recurse-submodules=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin pull
+
+		return
+		;;
+	esac
+	__git_complete_remote_or_refspec
+}
+
+__git_push_recurse_submodules="check on-demand only"
+
+__git_complete_force_with_lease ()
+{
+	local cur_=$1
+
+	case "$cur_" in
+	--*=)
+		;;
+	*:*)
+		__git_complete_refs --cur="${cur_#*:}"
+		;;
+	*)
+		__git_complete_refs --cur="$cur_"
+		;;
+	esac
+}
+
+_git_push ()
+{
+	case "$prev" in
+	--repo)
+		__gitcomp_nl "$(__git_remotes)"
+		return
+		;;
+	--recurse-submodules)
+		__gitcomp "$__git_push_recurse_submodules"
+		return
+		;;
+	esac
+	case "$cur" in
+	--repo=*)
+		__gitcomp_nl "$(__git_remotes)" "" "${cur##--repo=}"
+		return
+		;;
+	--recurse-submodules=*)
+		__gitcomp "$__git_push_recurse_submodules" "" "${cur##--recurse-submodules=}"
+		return
+		;;
+	--force-with-lease=*)
+		__git_complete_force_with_lease "${cur##--force-with-lease=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin push
+		return
+		;;
+	esac
+	__git_complete_remote_or_refspec
+}
+
+_git_range_diff ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp "
+			--creation-factor= --no-dual-color
+			$__git_diff_common_options
+		"
+		return
+		;;
+	esac
+	__git_complete_revlist
+}
+
+__git_rebase_inprogress_options="--continue --skip --abort --quit --show-current-patch"
+__git_rebase_interactive_inprogress_options="$__git_rebase_inprogress_options --edit-todo"
+
+_git_rebase ()
+{
+	__git_find_repo_path
+	if [ -f "$__git_repo_path"/rebase-merge/interactive ]; then
+		__gitcomp "$__git_rebase_interactive_inprogress_options"
+		return
+	elif [ -d "$__git_repo_path"/rebase-apply ] || \
+	     [ -d "$__git_repo_path"/rebase-merge ]; then
+		__gitcomp "$__git_rebase_inprogress_options"
+		return
+	fi
+	__git_complete_strategy && return
+	case "$cur" in
+	--whitespace=*)
+		__gitcomp "$__git_whitespacelist" "" "${cur##--whitespace=}"
+		return
+		;;
+	--onto=*)
+		__git_complete_refs --cur="${cur##--onto=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin rebase "" \
+			"$__git_rebase_interactive_inprogress_options"
+
+		return
+	esac
+	__git_complete_refs
+}
+
+_git_reflog ()
+{
+	local subcommands="show delete expire"
+	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+
+	if [ -z "$subcommand" ]; then
+		__gitcomp "$subcommands"
+	else
+		__git_complete_refs
+	fi
+}
+
+__git_send_email_confirm_options="always never auto cc compose"
+__git_send_email_suppresscc_options="author self cc bodycc sob cccmd body all"
+
+_git_send_email ()
+{
+	case "$prev" in
+	--to|--cc|--bcc|--from)
+		__gitcomp "$(__git send-email --dump-aliases)"
+		return
+		;;
+	esac
+
+	case "$cur" in
+	--confirm=*)
+		__gitcomp "
+			$__git_send_email_confirm_options
+			" "" "${cur##--confirm=}"
+		return
+		;;
+	--suppress-cc=*)
+		__gitcomp "
+			$__git_send_email_suppresscc_options
+			" "" "${cur##--suppress-cc=}"
+
+		return
+		;;
+	--smtp-encryption=*)
+		__gitcomp "ssl tls" "" "${cur##--smtp-encryption=}"
+		return
+		;;
+	--thread=*)
+		__gitcomp "
+			deep shallow
+			" "" "${cur##--thread=}"
+		return
+		;;
+	--to=*|--cc=*|--bcc=*|--from=*)
+		__gitcomp "$(__git send-email --dump-aliases)" "" "${cur#--*=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin send-email "$__git_format_patch_extra_options"
+		return
+		;;
+	esac
+	__git_complete_revlist
+}
+
+_git_stage ()
+{
+	_git_add
+}
+
+_git_status ()
+{
+	local complete_opt
+	local untracked_state
+
+	case "$cur" in
+	--ignore-submodules=*)
+		__gitcomp "none untracked dirty all" "" "${cur##--ignore-submodules=}"
+		return
+		;;
+	--untracked-files=*)
+		__gitcomp "$__git_untracked_file_modes" "" "${cur##--untracked-files=}"
+		return
+		;;
+	--column=*)
+		__gitcomp "
+			always never auto column row plain dense nodense
+			" "" "${cur##--column=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin status
+		return
+		;;
+	esac
+
+	untracked_state="$(__git_get_option_value "-u" "--untracked-files=" \
+		"$__git_untracked_file_modes" "status.showUntrackedFiles")"
+
+	case "$untracked_state" in
+	no)
+		# --ignored option does not matter
+		complete_opt=
+		;;
+	all|normal|*)
+		complete_opt="--cached --directory --no-empty-directory --others"
+
+		if [ -n "$(__git_find_on_cmdline "--ignored")" ]; then
+			complete_opt="$complete_opt --ignored --exclude=*"
+		fi
+		;;
+	esac
+
+	__git_complete_index_file "$complete_opt"
+}
+
+_git_switch ()
+{
+	local dwim_opt="$(__git_checkout_default_dwim_mode)"
+
+	case "$prev" in
+	-c|-C|--orphan)
+		# Complete local branches (and DWIM branch
+		# remote branch names) for an option argument
+		# specifying a new branch name. This is for
+		# convenience, assuming new branches are
+		# possibly based on pre-existing branch names.
+		__git_complete_refs $dwim_opt --mode="heads"
+		return
+		;;
+	*)
+		;;
+	esac
+
+	case "$cur" in
+	--conflict=*)
+		__gitcomp "diff3 merge zdiff3" "" "${cur##--conflict=}"
+		;;
+	--*)
+		__gitcomp_builtin switch
+		;;
+	*)
+		# Unlike in git checkout, git switch --orphan does not take
+		# a start point. Thus we really have nothing to complete after
+		# the branch name.
+		if [ -n "$(__git_find_on_cmdline "--orphan")" ]; then
+			return
+		fi
+
+		# At this point, we've already handled special completion for
+		# -c/-C, and --orphan. There are 3 main things left to
+		# complete:
+		# 1) a start-point for -c/-C or -d/--detach
+		# 2) a remote head, for --track
+		# 3) a branch name, possibly including DWIM remote branches
+
+		if [ -n "$(__git_find_on_cmdline "-c -C -d --detach")" ]; then
+			__git_complete_refs --mode="refs"
+		elif [ -n "$(__git_find_on_cmdline "-t --track")" ]; then
+			__git_complete_refs --mode="remote-heads"
+		else
+			__git_complete_refs $dwim_opt --mode="heads"
+		fi
+		;;
+	esac
+}
+
+__git_config_get_set_variables ()
+{
+	local prevword word config_file= c=$cword
+	while [ $c -gt "$__git_cmd_idx" ]; do
+		word="${words[c]}"
+		case "$word" in
+		--system|--global|--local|--file=*)
+			config_file="$word"
+			break
+			;;
+		-f|--file)
+			config_file="$word $prevword"
+			break
+			;;
+		esac
+		prevword=$word
+		c=$((--c))
+	done
+
+	__git config $config_file --name-only --list
+}
+
+__git_config_vars=
+__git_compute_config_vars ()
+{
+	test -n "$__git_config_vars" ||
+	__git_config_vars="$(git help --config-for-completion)"
+}
+
+__git_config_sections=
+__git_compute_config_sections ()
+{
+	test -n "$__git_config_sections" ||
+	__git_config_sections="$(git help --config-sections-for-completion)"
+}
+
+# Completes possible values of various configuration variables.
+#
+# Usage: __git_complete_config_variable_value [<option>]...
+# --varname=<word>: The name of the configuration variable whose value is
+#                   to be completed.  Defaults to the previous word on the
+#                   command line.
+# --cur=<word>: The current value to be completed.  Defaults to the current
+#               word to be completed.
+__git_complete_config_variable_value ()
+{
+	local varname="$prev" cur_="$cur"
+
+	while test $# != 0; do
+		case "$1" in
+		--varname=*)	varname="${1##--varname=}" ;;
+		--cur=*)	cur_="${1##--cur=}" ;;
+		*)		return 1 ;;
+		esac
+		shift
+	done
+
+	if [ "${BASH_VERSINFO[0]:-0}" -ge 4 ]; then
+		varname="${varname,,}"
+	else
+		varname="$(echo "$varname" |tr A-Z a-z)"
+	fi
+
+	case "$varname" in
+	branch.*.remote|branch.*.pushremote)
+		__gitcomp_nl "$(__git_remotes)" "" "$cur_"
+		return
+		;;
+	branch.*.merge)
+		__git_complete_refs --cur="$cur_"
+		return
+		;;
+	branch.*.rebase)
+		__gitcomp "false true merges interactive" "" "$cur_"
+		return
+		;;
+	remote.pushdefault)
+		__gitcomp_nl "$(__git_remotes)" "" "$cur_"
+		return
+		;;
+	remote.*.fetch)
+		local remote="${varname#remote.}"
+		remote="${remote%.fetch}"
+		if [ -z "$cur_" ]; then
+			__gitcomp_nl "refs/heads/" "" "" ""
+			return
+		fi
+		__gitcomp_nl "$(__git_refs_remotes "$remote")" "" "$cur_"
+		return
+		;;
+	remote.*.push)
+		local remote="${varname#remote.}"
+		remote="${remote%.push}"
+		__gitcomp_nl "$(__git for-each-ref \
+			--format='%(refname):%(refname)' refs/heads)" "" "$cur_"
+		return
+		;;
+	pull.twohead|pull.octopus)
+		__git_compute_merge_strategies
+		__gitcomp "$__git_merge_strategies" "" "$cur_"
+		return
+		;;
+	color.pager)
+		__gitcomp "false true" "" "$cur_"
+		return
+		;;
+	color.*.*)
+		__gitcomp "
+			normal black red green yellow blue magenta cyan white
+			bold dim ul blink reverse
+			" "" "$cur_"
+		return
+		;;
+	color.*)
+		__gitcomp "false true always never auto" "" "$cur_"
+		return
+		;;
+	diff.submodule)
+		__gitcomp "$__git_diff_submodule_formats" "" "$cur_"
+		return
+		;;
+	help.format)
+		__gitcomp "man info web html" "" "$cur_"
+		return
+		;;
+	log.date)
+		__gitcomp "$__git_log_date_formats" "" "$cur_"
+		return
+		;;
+	sendemail.aliasfiletype)
+		__gitcomp "mutt mailrc pine elm gnus" "" "$cur_"
+		return
+		;;
+	sendemail.confirm)
+		__gitcomp "$__git_send_email_confirm_options" "" "$cur_"
+		return
+		;;
+	sendemail.suppresscc)
+		__gitcomp "$__git_send_email_suppresscc_options" "" "$cur_"
+		return
+		;;
+	sendemail.transferencoding)
+		__gitcomp "7bit 8bit quoted-printable base64" "" "$cur_"
+		return
+		;;
+	*.*)
+		return
+		;;
+	esac
+}
+
+# Completes configuration sections, subsections, variable names.
+#
+# Usage: __git_complete_config_variable_name [<option>]...
+# --cur=<word>: The current configuration section/variable name to be
+#               completed.  Defaults to the current word to be completed.
+# --sfx=<suffix>: A suffix to be appended to each fully completed
+#                 configuration variable name (but not to sections or
+#                 subsections) instead of the default space.
+__git_complete_config_variable_name ()
+{
+	local cur_="$cur" sfx
+
+	while test $# != 0; do
+		case "$1" in
+		--cur=*)	cur_="${1##--cur=}" ;;
+		--sfx=*)	sfx="${1##--sfx=}" ;;
+		*)		return 1 ;;
+		esac
+		shift
+	done
+
+	case "$cur_" in
+	branch.*.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_##*.}"
+		__gitcomp "remote pushRemote merge mergeOptions rebase" "$pfx" "$cur_" "$sfx"
+		return
+		;;
+	branch.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_#*.}"
+		__gitcomp_direct "$(__git_heads "$pfx" "$cur_" ".")"
+		__gitcomp_nl_append $'autoSetupMerge\nautoSetupRebase\n' "$pfx" "$cur_" "${sfx- }"
+		return
+		;;
+	guitool.*.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_##*.}"
+		__gitcomp "
+			argPrompt cmd confirm needsFile noConsole noRescan
+			prompt revPrompt revUnmerged title
+			" "$pfx" "$cur_" "$sfx"
+		return
+		;;
+	difftool.*.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_##*.}"
+		__gitcomp "cmd path" "$pfx" "$cur_" "$sfx"
+		return
+		;;
+	man.*.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_##*.}"
+		__gitcomp "cmd path" "$pfx" "$cur_" "$sfx"
+		return
+		;;
+	mergetool.*.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_##*.}"
+		__gitcomp "cmd path trustExitCode" "$pfx" "$cur_" "$sfx"
+		return
+		;;
+	pager.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_#*.}"
+		__git_compute_all_commands
+		__gitcomp_nl "$__git_all_commands" "$pfx" "$cur_" "${sfx- }"
+		return
+		;;
+	remote.*.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_##*.}"
+		__gitcomp "
+			url proxy fetch push mirror skipDefaultUpdate
+			receivepack uploadpack tagOpt pushurl
+			" "$pfx" "$cur_" "$sfx"
+		return
+		;;
+	remote.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_#*.}"
+		__gitcomp_nl "$(__git_remotes)" "$pfx" "$cur_" "."
+		__gitcomp_nl_append "pushDefault" "$pfx" "$cur_" "${sfx- }"
+		return
+		;;
+	url.*.*)
+		local pfx="${cur_%.*}."
+		cur_="${cur_##*.}"
+		__gitcomp "insteadOf pushInsteadOf" "$pfx" "$cur_" "$sfx"
+		return
+		;;
+	*.*)
+		__git_compute_config_vars
+		__gitcomp "$__git_config_vars" "" "$cur_" "$sfx"
+		;;
+	*)
+		__git_compute_config_sections
+		__gitcomp "$__git_config_sections" "" "$cur_" "."
+		;;
+	esac
+}
+
+# Completes '='-separated configuration sections/variable names and values
+# for 'git -c section.name=value'.
+#
+# Usage: __git_complete_config_variable_name_and_value [<option>]...
+# --cur=<word>: The current configuration section/variable name/value to be
+#               completed. Defaults to the current word to be completed.
+__git_complete_config_variable_name_and_value ()
+{
+	local cur_="$cur"
+
+	while test $# != 0; do
+		case "$1" in
+		--cur=*)	cur_="${1##--cur=}" ;;
+		*)		return 1 ;;
+		esac
+		shift
+	done
+
+	case "$cur_" in
+	*=*)
+		__git_complete_config_variable_value \
+			--varname="${cur_%%=*}" --cur="${cur_#*=}"
+		;;
+	*)
+		__git_complete_config_variable_name --cur="$cur_" --sfx='='
+		;;
+	esac
+}
+
+_git_config ()
+{
+	case "$prev" in
+	--get|--get-all|--unset|--unset-all)
+		__gitcomp_nl "$(__git_config_get_set_variables)"
+		return
+		;;
+	*.*)
+		__git_complete_config_variable_value
+		return
+		;;
+	esac
+	case "$cur" in
+	--*)
+		__gitcomp_builtin config
+		;;
+	*)
+		__git_complete_config_variable_name
+		;;
+	esac
+}
+
+_git_remote ()
+{
+	local subcommands="
+		add rename remove set-head set-branches
+		get-url set-url show prune update
+		"
+	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+	if [ -z "$subcommand" ]; then
+		case "$cur" in
+		--*)
+			__gitcomp_builtin remote
+			;;
+		*)
+			__gitcomp "$subcommands"
+			;;
+		esac
+		return
+	fi
+
+	case "$subcommand,$cur" in
+	add,--*)
+		__gitcomp_builtin remote_add
+		;;
+	add,*)
+		;;
+	set-head,--*)
+		__gitcomp_builtin remote_set-head
+		;;
+	set-branches,--*)
+		__gitcomp_builtin remote_set-branches
+		;;
+	set-head,*|set-branches,*)
+		__git_complete_remote_or_refspec
+		;;
+	update,--*)
+		__gitcomp_builtin remote_update
+		;;
+	update,*)
+		__gitcomp "$(__git_remotes) $(__git_get_config_variables "remotes")"
+		;;
+	set-url,--*)
+		__gitcomp_builtin remote_set-url
+		;;
+	get-url,--*)
+		__gitcomp_builtin remote_get-url
+		;;
+	prune,--*)
+		__gitcomp_builtin remote_prune
+		;;
+	*)
+		__gitcomp_nl "$(__git_remotes)"
+		;;
+	esac
+}
+
+_git_replace ()
+{
+	case "$cur" in
+	--format=*)
+		__gitcomp "short medium long" "" "${cur##--format=}"
+		return
+		;;
+	--*)
+		__gitcomp_builtin replace
+		return
+		;;
+	esac
+	__git_complete_refs
+}
+
+_git_rerere ()
+{
+	local subcommands="clear forget diff remaining status gc"
+	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+	if test -z "$subcommand"
+	then
+		__gitcomp "$subcommands"
+		return
+	fi
+}
+
+_git_reset ()
+{
+	__git_has_doubledash && return
+
+	case "$cur" in
+	--*)
+		__gitcomp_builtin reset
+		return
+		;;
+	esac
+	__git_complete_refs
+}
+
+_git_restore ()
+{
+	case "$prev" in
+	-s)
+		__git_complete_refs
+		return
+		;;
+	esac
+
+	case "$cur" in
+	--conflict=*)
+		__gitcomp "diff3 merge zdiff3" "" "${cur##--conflict=}"
+		;;
+	--source=*)
+		__git_complete_refs --cur="${cur##--source=}"
+		;;
+	--*)
+		__gitcomp_builtin restore
+		;;
+	*)
+		if __git rev-parse --verify --quiet HEAD >/dev/null; then
+			__git_complete_index_file "--modified"
+		fi
+	esac
+}
+
+__git_revert_inprogress_options=$__git_sequencer_inprogress_options
+
+_git_revert ()
+{
+	__git_find_repo_path
+	if [ -f "$__git_repo_path"/REVERT_HEAD ]; then
+		__gitcomp "$__git_revert_inprogress_options"
+		return
+	fi
+	__git_complete_strategy && return
+	case "$cur" in
+	--*)
+		__gitcomp_builtin revert "" \
+			"$__git_revert_inprogress_options"
+		return
+		;;
+	esac
+	__git_complete_refs
+}
+
+_git_rm ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin rm
+		return
+		;;
+	esac
+
+	__git_complete_index_file "--cached"
+}
+
+_git_shortlog ()
+{
+	__git_has_doubledash && return
+
+	case "$cur" in
+	--*)
+		__gitcomp "
+			$__git_log_common_options
+			$__git_log_shortlog_options
+			--numbered --summary --email
+			"
+		return
+		;;
+	esac
+	__git_complete_revlist
+}
+
+_git_show ()
+{
+	__git_has_doubledash && return
+
+	case "$cur" in
+	--pretty=*|--format=*)
+		__gitcomp "$__git_log_pretty_formats $(__git_pretty_aliases)
+			" "" "${cur#*=}"
+		return
+		;;
+	--diff-algorithm=*)
+		__gitcomp "$__git_diff_algorithms" "" "${cur##--diff-algorithm=}"
+		return
+		;;
+	--submodule=*)
+		__gitcomp "$__git_diff_submodule_formats" "" "${cur##--submodule=}"
+		return
+		;;
+	--color-moved=*)
+		__gitcomp "$__git_color_moved_opts" "" "${cur##--color-moved=}"
+		return
+		;;
+	--color-moved-ws=*)
+		__gitcomp "$__git_color_moved_ws_opts" "" "${cur##--color-moved-ws=}"
+		return
+		;;
+	--ws-error-highlight=*)
+		__gitcomp "$__git_ws_error_highlight_opts" "" "${cur##--ws-error-highlight=}"
+		return
+		;;
+	--diff-merges=*)
+                __gitcomp "$__git_diff_merges_opts" "" "${cur##--diff-merges=}"
+                return
+                ;;
+	--*)
+		__gitcomp "--pretty= --format= --abbrev-commit --no-abbrev-commit
+			--oneline --show-signature
+			--expand-tabs --expand-tabs= --no-expand-tabs
+			$__git_log_show_options
+			$__git_diff_common_options
+			"
+		return
+		;;
+	esac
+	__git_complete_revlist_file
+}
+
+_git_show_branch ()
+{
+	case "$cur" in
+	--*)
+		__gitcomp_builtin show-branch
+		return
+		;;
+	esac
+	__git_complete_revlist
+}
+
+__gitcomp_directories ()
+{
+	local _tmp_dir _tmp_completions _found=0
+
+	# Get the directory of the current token; this differs from dirname
+	# in that it keeps up to the final trailing slash.  If no slash found
+	# that's fine too.
+	[[ "$cur" =~ .*/ ]]
+	_tmp_dir=$BASH_REMATCH
+
+	# Find possible directory completions, adding trailing '/' characters,
+	# de-quoting, and handling unusual characters.
+	while IFS= read -r -d $'\0' c ; do
+		# If there are directory completions, find ones that start
+		# with "$cur", the current token, and put those in COMPREPLY
+		if [[ $c == "$cur"* ]]; then
+			COMPREPLY+=("$c/")
+			_found=1
+		fi
+	done < <(git ls-tree -z -d --name-only HEAD $_tmp_dir)
+
+	if [[ $_found == 0 ]] && [[ "$cur" =~ /$ ]]; then
+		# No possible further completions any deeper, so assume we're at
+		# a leaf directory and just consider it complete
+		__gitcomp_direct_append "$cur "
+	fi
+}
+
+_git_sparse_checkout ()
+{
+	local subcommands="list init set disable add reapply"
+	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+	if [ -z "$subcommand" ]; then
+		__gitcomp "$subcommands"
+		return
+	fi
+
+	case "$subcommand,$cur" in
+	*,--*)
+		__gitcomp_builtin sparse-checkout_$subcommand "" "--"
+		;;
+	set,*|add,*)
+		if [ "$(__git config core.sparseCheckoutCone)" == "true" ] ||
+		[ -n "$(__git_find_on_cmdline --cone)" ]; then
+			__gitcomp_directories
+		fi
+	esac
+}
+
+_git_stash ()
+{
+	local subcommands='push list show apply clear drop pop create branch'
+	local subcommand="$(__git_find_on_cmdline "$subcommands save")"
+
+	if [ -z "$subcommand" ]; then
+		case "$((cword - __git_cmd_idx)),$cur" in
+		*,--*)
+			__gitcomp_builtin stash_push
+			;;
+		1,sa*)
+			__gitcomp "save"
+			;;
+		1,*)
+			__gitcomp "$subcommands"
+			;;
+		esac
+		return
+	fi
+
+	case "$subcommand,$cur" in
+	list,--*)
+		# NEEDSWORK: can we somehow unify this with the options in _git_log() and _git_show()
+		__gitcomp_builtin stash_list "$__git_log_common_options $__git_diff_common_options"
+		;;
+	show,--*)
+		__gitcomp_builtin stash_show "$__git_diff_common_options"
+		;;
+	*,--*)
+		__gitcomp_builtin "stash_$subcommand"
+		;;
+	branch,*)
+		if [ $cword -eq $((__git_cmd_idx+2)) ]; then
+			__git_complete_refs
+		else
+			__gitcomp_nl "$(__git stash list \
+					| sed -n -e 's/:.*//p')"
+		fi
+		;;
+	show,*|apply,*|drop,*|pop,*)
+		__gitcomp_nl "$(__git stash list \
+				| sed -n -e 's/:.*//p')"
+		;;
+	esac
+}
+
+_git_submodule ()
+{
+	__git_has_doubledash && return
+
+	local subcommands="add status init deinit update set-branch set-url summary foreach sync absorbgitdirs"
+	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+	if [ -z "$subcommand" ]; then
+		case "$cur" in
+		--*)
+			__gitcomp "--quiet"
+			;;
+		*)
+			__gitcomp "$subcommands"
+			;;
+		esac
+		return
+	fi
+
+	case "$subcommand,$cur" in
+	add,--*)
+		__gitcomp "--branch --force --name --reference --depth"
+		;;
+	status,--*)
+		__gitcomp "--cached --recursive"
+		;;
+	deinit,--*)
+		__gitcomp "--force --all"
+		;;
+	update,--*)
+		__gitcomp "
+			--init --remote --no-fetch
+			--recommend-shallow --no-recommend-shallow
+			--force --rebase --merge --reference --depth --recursive --jobs
+		"
+		;;
+	set-branch,--*)
+		__gitcomp "--default --branch"
+		;;
+	summary,--*)
+		__gitcomp "--cached --files --summary-limit"
+		;;
+	foreach,--*|sync,--*)
+		__gitcomp "--recursive"
+		;;
+	*)
+		;;
+	esac
+}
+
+_git_svn ()
+{
+	local subcommands="
+		init fetch clone rebase dcommit log find-rev
+		set-tree commit-diff info create-ignore propget
+		proplist show-ignore show-externals branch tag blame
+		migrate mkdirs reset gc
+		"
+	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+	if [ -z "$subcommand" ]; then
+		__gitcomp "$subcommands"
+	else
+		local remote_opts="--username= --config-dir= --no-auth-cache"
+		local fc_opts="
+			--follow-parent --authors-file= --repack=
+			--no-metadata --use-svm-props --use-svnsync-props
+			--log-window-size= --no-checkout --quiet
+			--repack-flags --use-log-author --localtime
+			--add-author-from
+			--recursive
+			--ignore-paths= --include-paths= $remote_opts
+			"
+		local init_opts="
+			--template= --shared= --trunk= --tags=
+			--branches= --stdlayout --minimize-url
+			--no-metadata --use-svm-props --use-svnsync-props
+			--rewrite-root= --prefix= $remote_opts
+			"
+		local cmt_opts="
+			--edit --rmdir --find-copies-harder --copy-similarity=
+			"
+
+		case "$subcommand,$cur" in
+		fetch,--*)
+			__gitcomp "--revision= --fetch-all $fc_opts"
+			;;
+		clone,--*)
+			__gitcomp "--revision= $fc_opts $init_opts"
+			;;
+		init,--*)
+			__gitcomp "$init_opts"
+			;;
+		dcommit,--*)
+			__gitcomp "
+				--merge --strategy= --verbose --dry-run
+				--fetch-all --no-rebase --commit-url
+				--revision --interactive $cmt_opts $fc_opts
+				"
+			;;
+		set-tree,--*)
+			__gitcomp "--stdin $cmt_opts $fc_opts"
+			;;
+		create-ignore,--*|propget,--*|proplist,--*|show-ignore,--*|\
+		show-externals,--*|mkdirs,--*)
+			__gitcomp "--revision="
+			;;
+		log,--*)
+			__gitcomp "
+				--limit= --revision= --verbose --incremental
+				--oneline --show-commit --non-recursive
+				--authors-file= --color
+				"
+			;;
+		rebase,--*)
+			__gitcomp "
+				--merge --verbose --strategy= --local
+				--fetch-all --dry-run $fc_opts
+				"
+			;;
+		commit-diff,--*)
+			__gitcomp "--message= --file= --revision= $cmt_opts"
+			;;
+		info,--*)
+			__gitcomp "--url"
+			;;
+		branch,--*)
+			__gitcomp "--dry-run --message --tag"
+			;;
+		tag,--*)
+			__gitcomp "--dry-run --message"
+			;;
+		blame,--*)
+			__gitcomp "--git-format"
+			;;
+		migrate,--*)
+			__gitcomp "
+				--config-dir= --ignore-paths= --minimize
+				--no-auth-cache --username=
+				"
+			;;
+		reset,--*)
+			__gitcomp "--revision= --parent"
+			;;
+		*)
+			;;
+		esac
+	fi
+}
+
+_git_tag ()
+{
+	local i c="$__git_cmd_idx" f=0
+	while [ $c -lt $cword ]; do
+		i="${words[c]}"
+		case "$i" in
+		-d|--delete|-v|--verify)
+			__gitcomp_direct "$(__git_tags "" "$cur" " ")"
+			return
+			;;
+		-f)
+			f=1
+			;;
+		esac
+		((c++))
+	done
+
+	case "$prev" in
+	-m|-F)
+		;;
+	-*|tag)
+		if [ $f = 1 ]; then
+			__gitcomp_direct "$(__git_tags "" "$cur" " ")"
+		fi
+		;;
+	*)
+		__git_complete_refs
+		;;
+	esac
+
+	case "$cur" in
+	--*)
+		__gitcomp_builtin tag
+		;;
+	esac
+}
+
+_git_whatchanged ()
+{
+	_git_log
+}
+
+__git_complete_worktree_paths ()
+{
+	local IFS=$'\n'
+	# Generate completion reply from worktree list skipping the first
+	# entry: it's the path of the main worktree, which can't be moved,
+	# removed, locked, etc.
+	__gitcomp_nl "$(git worktree list --porcelain |
+		sed -n -e '2,$ s/^worktree //p')"
+}
+
+_git_worktree ()
+{
+	local subcommands="add list lock move prune remove unlock"
+	local subcommand subcommand_idx
+
+	subcommand="$(__git_find_on_cmdline --show-idx "$subcommands")"
+	subcommand_idx="${subcommand% *}"
+	subcommand="${subcommand#* }"
+
+	case "$subcommand,$cur" in
+	,*)
+		__gitcomp "$subcommands"
+		;;
+	*,--*)
+		__gitcomp_builtin worktree_$subcommand
+		;;
+	add,*)	# usage: git worktree add [<options>] <path> [<commit-ish>]
+		# Here we are not completing an --option, it's either the
+		# path or a ref.
+		case "$prev" in
+		-b|-B)	# Complete refs for branch to be created/reseted.
+			__git_complete_refs
+			;;
+		-*)	# The previous word is an -o|--option without an
+			# unstuck argument: have to complete the path for
+			# the new worktree, so don't list anything, but let
+			# Bash fall back to filename completion.
+			;;
+		*)	# The previous word is not an --option, so it must
+			# be either the 'add' subcommand, the unstuck
+			# argument of an option (e.g. branch for -b|-B), or
+			# the path for the new worktree.
+			if [ $cword -eq $((subcommand_idx+1)) ]; then
+				# Right after the 'add' subcommand: have to
+				# complete the path, so fall back to Bash
+				# filename completion.
+				:
+			else
+				case "${words[cword-2]}" in
+				-b|-B)	# After '-b <branch>': have to
+					# complete the path, so fall back
+					# to Bash filename completion.
+					;;
+				*)	# After the path: have to complete
+					# the ref to be checked out.
+					__git_complete_refs
+					;;
+				esac
+			fi
+			;;
+		esac
+		;;
+	lock,*|remove,*|unlock,*)
+		__git_complete_worktree_paths
+		;;
+	move,*)
+		if [ $cword -eq $((subcommand_idx+1)) ]; then
+			# The first parameter must be an existing working
+			# tree to be moved.
+			__git_complete_worktree_paths
+		else
+			# The second parameter is the destination: it could
+			# be any path, so don't list anything, but let Bash
+			# fall back to filename completion.
+			:
+		fi
+		;;
+	esac
+}
+
+__git_complete_common () {
+	local command="$1"
+
+	case "$cur" in
+	--*)
+		__gitcomp_builtin "$command"
+		;;
+	esac
+}
+
+__git_cmds_with_parseopt_helper=
+__git_support_parseopt_helper () {
+	test -n "$__git_cmds_with_parseopt_helper" ||
+		__git_cmds_with_parseopt_helper="$(__git --list-cmds=parseopt)"
+
+	case " $__git_cmds_with_parseopt_helper " in
+	*" $1 "*)
+		return 0
+		;;
+	*)
+		return 1
+		;;
+	esac
+}
+
+__git_have_func () {
+	declare -f -- "$1" >/dev/null 2>&1
+}
+
+__git_complete_command () {
+	local command="$1"
+	local completion_func="_git_${command//-/_}"
+	if ! __git_have_func $completion_func &&
+		__git_have_func _completion_loader
+	then
+		_completion_loader "git-$command"
+	fi
+	if __git_have_func $completion_func
+	then
+		$completion_func
+		return 0
+	elif __git_support_parseopt_helper "$command"
+	then
+		__git_complete_common "$command"
+		return 0
+	else
+		return 1
+	fi
+}
+
+__git_main ()
+{
+	local i c=1 command __git_dir __git_repo_path
+	local __git_C_args C_args_count=0
+	local __git_cmd_idx
+
+	while [ $c -lt $cword ]; do
+		i="${words[c]}"
+		case "$i" in
+		--git-dir=*)
+			__git_dir="${i#--git-dir=}"
+			;;
+		--git-dir)
+			((c++))
+			__git_dir="${words[c]}"
+			;;
+		--bare)
+			__git_dir="."
+			;;
+		--help)
+			command="help"
+			break
+			;;
+		-c|--work-tree|--namespace)
+			((c++))
+			;;
+		-C)
+			__git_C_args[C_args_count++]=-C
+			((c++))
+			__git_C_args[C_args_count++]="${words[c]}"
+			;;
+		-*)
+			;;
+		*)
+			command="$i"
+			__git_cmd_idx="$c"
+			break
+			;;
+		esac
+		((c++))
+	done
+
+	if [ -z "${command-}" ]; then
+		case "$prev" in
+		--git-dir|-C|--work-tree)
+			# these need a path argument, let's fall back to
+			# Bash filename completion
+			return
+			;;
+		-c)
+			__git_complete_config_variable_name_and_value
+			return
+			;;
+		--namespace)
+			# we don't support completing these options' arguments
+			return
+			;;
+		esac
+		case "$cur" in
+		--*)
+			__gitcomp "
+			--paginate
+			--no-pager
+			--git-dir=
+			--bare
+			--version
+			--exec-path
+			--exec-path=
+			--html-path
+			--man-path
+			--info-path
+			--work-tree=
+			--namespace=
+			--no-replace-objects
+			--help
+			"
+			;;
+		*)
+			if test -n "${GIT_TESTING_PORCELAIN_COMMAND_LIST-}"
+			then
+				__gitcomp "$GIT_TESTING_PORCELAIN_COMMAND_LIST"
+			else
+				local list_cmds=list-mainporcelain,others,nohelpers,alias,list-complete,config
+
+				if test "${GIT_COMPLETION_SHOW_ALL_COMMANDS-}" = "1"
+				then
+					list_cmds=builtins,$list_cmds
+				fi
+				__gitcomp "$(__git --list-cmds=$list_cmds)"
+			fi
+			;;
+		esac
+		return
+	fi
+
+	__git_complete_command "$command" && return
+
+	local expansion=$(__git_aliased_command "$command")
+	if [ -n "$expansion" ]; then
+		words[1]=$expansion
+		__git_complete_command "$expansion"
+	fi
+}
+
+__gitk_main ()
+{
+	__git_has_doubledash && return
+
+	local __git_repo_path
+	__git_find_repo_path
+
+	local merge=""
+	if [ -f "$__git_repo_path/MERGE_HEAD" ]; then
+		merge="--merge"
+	fi
+	case "$cur" in
+	--*)
+		__gitcomp "
+			$__git_log_common_options
+			$__git_log_gitk_options
+			$merge
+			"
+		return
+		;;
+	esac
+	__git_complete_revlist
+}
+
+if [[ -n ${ZSH_VERSION-} && -z ${GIT_SOURCING_ZSH_COMPLETION-} ]]; then
+	echo "ERROR: this script is obsolete, please see git-completion.zsh" 1>&2
+	return
+fi
+
+__git_func_wrap ()
+{
+	local cur words cword prev
+	local __git_cmd_idx=0
+	_get_comp_words_by_ref -n =: cur words cword prev
+	$1
+}
+
+___git_complete ()
+{
+	local wrapper="__git_wrap${2}"
+	eval "$wrapper () { __git_func_wrap $2 ; }"
+	complete -o bashdefault -o default -o nospace -F $wrapper $1 2>/dev/null \
+		|| complete -o default -o nospace -F $wrapper $1
+}
+
+# Setup the completion for git commands
+# 1: command or alias
+# 2: function to call (e.g. `git`, `gitk`, `git_fetch`)
+__git_complete ()
+{
+	local func
+
+	if __git_have_func $2; then
+		func=$2
+	elif __git_have_func __$2_main; then
+		func=__$2_main
+	elif __git_have_func _$2; then
+		func=_$2
+	else
+		echo "ERROR: could not find function '$2'" 1>&2
+		return 1
+	fi
+	___git_complete $1 $func
+}
+
+___git_complete git __git_main
+___git_complete gitk __gitk_main
+
+# The following are necessary only for Cygwin, and only are needed
+# when the user has tab-completed the executable name and consequently
+# included the '.exe' suffix.
+#
+if [ "$OSTYPE" = cygwin ]; then
+	___git_complete git.exe __git_main
+fi
diff --git a/contrib/completion/git-completion.tcsh b/contrib/completion/git-completion.tcsh
new file mode 100644
index 0000000..ba797e5
--- /dev/null
+++ b/contrib/completion/git-completion.tcsh
@@ -0,0 +1,127 @@
+# tcsh completion support for core Git.
+#
+# Copyright (C) 2012 Marc Khouzam <marc.khouzam@gmail.com>
+# Distributed under the GNU General Public License, version 2.0.
+#
+# When sourced, this script will generate a new script that uses
+# the git-completion.bash script provided by core Git.  This new
+# script can be used by tcsh to perform git completion.
+# The current script also issues the necessary tcsh 'complete'
+# commands.
+#
+# To use this completion script:
+#
+#    0) You need tcsh 6.16.00 or newer.
+#    1) Copy both this file and the bash completion script to ${HOME}.
+#       You _must_ use the name ${HOME}/.git-completion.bash for the
+#       bash script.
+#       (e.g. ~/.git-completion.tcsh and ~/.git-completion.bash).
+#    2) Add the following line to your .tcshrc/.cshrc:
+#        source ~/.git-completion.tcsh
+#    3) For completion similar to bash, it is recommended to also
+#       add the following line to your .tcshrc/.cshrc:
+#        set autolist=ambiguous
+#       It will tell tcsh to list the possible completion choices.
+
+set __git_tcsh_completion_version = `\echo ${tcsh} | \sed 's/\./ /g'`
+if ( ${__git_tcsh_completion_version[1]} < 6 || \
+     ( ${__git_tcsh_completion_version[1]} == 6 && \
+       ${__git_tcsh_completion_version[2]} < 16 ) ) then
+	echo "git-completion.tcsh: Your version of tcsh is too old, you need version 6.16.00 or newer.  Git completion will not work."
+	exit
+endif
+unset __git_tcsh_completion_version
+
+set __git_tcsh_completion_original_script = ${HOME}/.git-completion.bash
+set __git_tcsh_completion_script = ${HOME}/.git-completion.tcsh.bash
+
+# Check that the user put the script in the right place
+if ( ! -e ${__git_tcsh_completion_original_script} ) then
+	echo "git-completion.tcsh: Cannot find: ${__git_tcsh_completion_original_script}.  Git completion will not work."
+	exit
+endif
+
+cat << EOF >! ${__git_tcsh_completion_script}
+#!bash
+#
+# This script is GENERATED and will be overwritten automatically.
+# Do not modify it directly.  Instead, modify git-completion.tcsh
+# and source it again.
+
+source ${__git_tcsh_completion_original_script}
+
+# Remove the colon as a completion separator because tcsh cannot handle it
+COMP_WORDBREAKS=\${COMP_WORDBREAKS//:}
+
+# For file completion, tcsh needs the '/' to be appended to directories.
+# By default, the bash script does not do that.
+# We can achieve this by using the below compatibility
+# method of the git-completion.bash script.
+__git_index_file_list_filter ()
+{
+	__git_index_file_list_filter_compat
+}
+
+# Set COMP_WORDS in a way that can be handled by the bash script.
+COMP_WORDS=(\$2)
+
+# The cursor is at the end of parameter #1.
+# We must check for a space as the last character which will
+# tell us that the previous word is complete and the cursor
+# is on the next word.
+if [ "\${2: -1}" == " " ]; then
+	# The last character is a space, so our location is at the end
+	# of the command-line array
+	COMP_CWORD=\${#COMP_WORDS[@]}
+else
+	# The last character is not a space, so our location is on the
+	# last word of the command-line array, so we must decrement the
+	# count by 1
+	COMP_CWORD=\$((\${#COMP_WORDS[@]}-1))
+fi
+
+# Call __git_wrap__git_main() or __git_wrap__gitk_main() of the bash script,
+# based on the first argument
+__git_wrap__\${1}_main
+
+IFS=\$'\n'
+if [ \${#COMPREPLY[*]} -eq 0 ]; then
+	# No completions suggested.  In this case, we want tcsh to perform
+	# standard file completion.  However, there does not seem to be way
+	# to tell tcsh to do that.  To help the user, we try to simulate
+	# file completion directly in this script.
+	#
+	# Known issues:
+	#     - Possible completions are shown with their directory prefix.
+	#     - Completions containing shell variables are not handled.
+	#     - Completions with ~ as the first character are not handled.
+
+	# No file completion should be done unless we are completing beyond
+	# the git sub-command.  An improvement on the bash completion :)
+	if [ \${COMP_CWORD} -gt 1 ]; then
+		TO_COMPLETE="\${COMP_WORDS[\${COMP_CWORD}]}"
+
+		# We don't support ~ expansion: too tricky.
+		if [ "\${TO_COMPLETE:0:1}" != "~" ]; then
+			# Use ls so as to add the '/' at the end of directories.
+			COMPREPLY=(\`ls -dp \${TO_COMPLETE}* 2> /dev/null\`)
+		fi
+	fi
+fi
+
+# tcsh does not automatically remove duplicates, so we do it ourselves
+echo "\${COMPREPLY[*]}" | sort | uniq
+
+# If there is a single completion and it is a directory, we output it
+# a second time to trick tcsh into not adding a space after it.
+if [ \${#COMPREPLY[*]} -eq 1 ] && [ "\${COMPREPLY[0]: -1}" == "/" ]; then
+	echo "\${COMPREPLY[*]}"
+fi
+
+EOF
+
+# Don't need this variable anymore, so don't pollute the users environment
+unset __git_tcsh_completion_original_script
+
+complete git  'p,*,`bash ${__git_tcsh_completion_script} git "${COMMAND_LINE}"`,'
+complete gitk 'p,*,`bash ${__git_tcsh_completion_script} gitk "${COMMAND_LINE}"`,'
diff --git a/contrib/completion/git-completion.zsh b/contrib/completion/git-completion.zsh
new file mode 100644
index 0000000..cac6f61
--- /dev/null
+++ b/contrib/completion/git-completion.zsh
@@ -0,0 +1,294 @@
+#compdef git gitk
+
+# zsh completion wrapper for git
+#
+# Copyright (c) 2012-2020 Felipe Contreras <felipe.contreras@gmail.com>
+#
+# The recommended way to install this script is to make a copy of it as a
+# file named '_git' inside any directory in your fpath.
+#
+# For example, create a directory '~/.zsh/', copy this file to '~/.zsh/_git',
+# and then add the following to your ~/.zshrc file:
+#
+#  fpath=(~/.zsh $fpath)
+#
+# You need git's bash completion script installed. By default bash-completion's
+# location will be used (e.g. pkg-config --variable=completionsdir bash-completion).
+#
+# If your bash completion script is somewhere else, you can specify the
+# location in your ~/.zshrc:
+#
+#  zstyle ':completion:*:*:git:*' script ~/.git-completion.bash
+#
+
+zstyle -T ':completion:*:*:git:*' tag-order && \
+	zstyle ':completion:*:*:git:*' tag-order 'common-commands'
+
+zstyle -s ":completion:*:*:git:*" script script
+if [ -z "$script" ]; then
+	local -a locations
+	local e bash_completion
+
+	bash_completion=$(pkg-config --variable=completionsdir bash-completion 2>/dev/null) ||
+		bash_completion='/usr/share/bash-completion/completions/'
+
+	locations=(
+		"$(dirname ${funcsourcetrace[1]%:*})"/git-completion.bash
+		"$HOME/.local/share/bash-completion/completions/git"
+		"$bash_completion/git"
+		'/etc/bash_completion.d/git' # old debian
+		)
+	for e in $locations; do
+		test -f $e && script="$e" && break
+	done
+fi
+
+local old_complete="$functions[complete]"
+functions[complete]=:
+GIT_SOURCING_ZSH_COMPLETION=y . "$script"
+functions[complete]="$old_complete"
+
+__gitcomp ()
+{
+	emulate -L zsh
+
+	local cur_="${3-$cur}"
+
+	case "$cur_" in
+	--*=)
+		;;
+	--no-*)
+		local c IFS=$' \t\n'
+		local -a array
+		for c in ${=1}; do
+			if [[ $c == "--" ]]; then
+				continue
+			fi
+			c="$c${4-}"
+			case $c in
+			--*=|*.) ;;
+			*) c="$c " ;;
+			esac
+			array+=("$c")
+		done
+		compset -P '*[=:]'
+		compadd -Q -S '' -p "${2-}" -a -- array && _ret=0
+		;;
+	*)
+		local c IFS=$' \t\n'
+		local -a array
+		for c in ${=1}; do
+			if [[ $c == "--" ]]; then
+				c="--no-...${4-}"
+				array+=("$c ")
+				break
+			fi
+			c="$c${4-}"
+			case $c in
+			--*=|*.) ;;
+			*) c="$c " ;;
+			esac
+			array+=("$c")
+		done
+		compset -P '*[=:]'
+		compadd -Q -S '' -p "${2-}" -a -- array && _ret=0
+		;;
+	esac
+}
+
+__gitcomp_direct ()
+{
+	emulate -L zsh
+
+	compset -P '*[=:]'
+	compadd -Q -S '' -- ${(f)1} && _ret=0
+}
+
+__gitcomp_nl ()
+{
+	emulate -L zsh
+
+	compset -P '*[=:]'
+	compadd -Q -S "${4- }" -p "${2-}" -- ${(f)1} && _ret=0
+}
+
+__gitcomp_file ()
+{
+	emulate -L zsh
+
+	compset -P '*[=:]'
+	compadd -f -p "${2-}" -- ${(f)1} && _ret=0
+}
+
+__gitcomp_direct_append ()
+{
+	__gitcomp_direct "$@"
+}
+
+__gitcomp_nl_append ()
+{
+	__gitcomp_nl "$@"
+}
+
+__gitcomp_file_direct ()
+{
+	__gitcomp_file "$1" ""
+}
+
+_git_zsh ()
+{
+	__gitcomp "v1.1"
+}
+
+__git_complete_command ()
+{
+	emulate -L zsh
+
+	local command="$1"
+	local completion_func="_git_${command//-/_}"
+	if (( $+functions[$completion_func] )); then
+		emulate ksh -c $completion_func
+		return 0
+	else
+		return 1
+	fi
+}
+
+__git_zsh_bash_func ()
+{
+	emulate -L ksh
+
+	local command=$1
+
+	__git_complete_command "$command" && return
+
+	local expansion=$(__git_aliased_command "$command")
+	if [ -n "$expansion" ]; then
+		words[1]=$expansion
+		__git_complete_command "$expansion"
+	fi
+}
+
+__git_zsh_cmd_common ()
+{
+	local -a list
+	list=(
+	add:'add file contents to the index'
+	bisect:'find by binary search the change that introduced a bug'
+	branch:'list, create, or delete branches'
+	checkout:'checkout a branch or paths to the working tree'
+	clone:'clone a repository into a new directory'
+	commit:'record changes to the repository'
+	diff:'show changes between commits, commit and working tree, etc'
+	fetch:'download objects and refs from another repository'
+	grep:'print lines matching a pattern'
+	init:'create an empty Git repository or reinitialize an existing one'
+	log:'show commit logs'
+	merge:'join two or more development histories together'
+	mv:'move or rename a file, a directory, or a symlink'
+	pull:'fetch from and merge with another repository or a local branch'
+	push:'update remote refs along with associated objects'
+	rebase:'forward-port local commits to the updated upstream head'
+	reset:'reset current HEAD to the specified state'
+	restore:'restore working tree files'
+	rm:'remove files from the working tree and from the index'
+	show:'show various types of objects'
+	status:'show the working tree status'
+	switch:'switch branches'
+	tag:'create, list, delete or verify a tag object signed with GPG')
+	_describe -t common-commands 'common commands' list && _ret=0
+}
+
+__git_zsh_cmd_alias ()
+{
+	local -a list
+	list=(${${(0)"$(git config -z --get-regexp '^alias\.*')"}#alias.})
+	list=(${(f)"$(printf "%s:alias for '%s'\n" ${(f@)list})"})
+	_describe -t alias-commands 'aliases' list && _ret=0
+}
+
+__git_zsh_cmd_all ()
+{
+	local -a list
+	emulate ksh -c __git_compute_all_commands
+	list=( ${=__git_all_commands} )
+	_describe -t all-commands 'all commands' list && _ret=0
+}
+
+__git_zsh_main ()
+{
+	local curcontext="$curcontext" state state_descr line
+	typeset -A opt_args
+	local -a orig_words
+
+	orig_words=( ${words[@]} )
+
+	_arguments -C \
+		'(-p --paginate --no-pager)'{-p,--paginate}'[pipe all output into ''less'']' \
+		'(-p --paginate)--no-pager[do not pipe git output into a pager]' \
+		'--git-dir=-[set the path to the repository]: :_directories' \
+		'--bare[treat the repository as a bare repository]' \
+		'(- :)--version[prints the git suite version]' \
+		'--exec-path=-[path to where your core git programs are installed]:: :_directories' \
+		'--html-path[print the path where git''s HTML documentation is installed]' \
+		'--info-path[print the path where the Info files are installed]' \
+		'--man-path[print the manpath (see `man(1)`) for the man pages]' \
+		'--work-tree=-[set the path to the working tree]: :_directories' \
+		'--namespace=-[set the git namespace]' \
+		'--no-replace-objects[do not use replacement refs to replace git objects]' \
+		'(- :)--help[prints the synopsis and a list of the most commonly used commands]: :->arg' \
+		'(-): :->command' \
+		'(-)*:: :->arg' && return
+
+	case $state in
+	(command)
+		_tags common-commands alias-commands all-commands
+		while _tags; do
+			_requested common-commands && __git_zsh_cmd_common
+			_requested alias-commands && __git_zsh_cmd_alias
+			_requested all-commands && __git_zsh_cmd_all
+			let _ret || break
+		done
+		;;
+	(arg)
+		local command="${words[1]}" __git_dir __git_cmd_idx=1
+
+		if (( $+opt_args[--bare] )); then
+			__git_dir='.'
+		else
+			__git_dir=${opt_args[--git-dir]}
+		fi
+
+		(( $+opt_args[--help] )) && command='help'
+
+		words=( ${orig_words[@]} )
+
+		__git_zsh_bash_func $command
+		;;
+	esac
+}
+
+_git ()
+{
+	local _ret=1
+	local cur cword prev
+
+	cur=${words[CURRENT]}
+	prev=${words[CURRENT-1]}
+	let cword=CURRENT-1
+
+	if (( $+functions[__${service}_zsh_main] )); then
+		__${service}_zsh_main
+	elif (( $+functions[__${service}_main] )); then
+		emulate ksh -c __${service}_main
+	elif (( $+functions[_${service}] )); then
+		emulate ksh -c _${service}
+	elif ((	$+functions[_${service//-/_}] )); then
+		emulate ksh -c _${service//-/_}
+	fi
+
+	let _ret && _default && _ret=0
+	return _ret
+}
+
+_git
diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
new file mode 100644
index 0000000..2c03005
--- /dev/null
+++ b/contrib/completion/git-prompt.sh
@@ -0,0 +1,594 @@
+# bash/zsh git prompt support
+#
+# Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
+# Distributed under the GNU General Public License, version 2.0.
+#
+# This script allows you to see repository status in your prompt.
+#
+# To enable:
+#
+#    1) Copy this file to somewhere (e.g. ~/.git-prompt.sh).
+#    2) Add the following line to your .bashrc/.zshrc:
+#        source ~/.git-prompt.sh
+#    3a) Change your PS1 to call __git_ps1 as
+#        command-substitution:
+#        Bash: PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '
+#        ZSH:  setopt PROMPT_SUBST ; PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
+#        the optional argument will be used as format string.
+#    3b) Alternatively, for a slightly faster prompt, __git_ps1 can
+#        be used for PROMPT_COMMAND in Bash or for precmd() in Zsh
+#        with two parameters, <pre> and <post>, which are strings
+#        you would put in $PS1 before and after the status string
+#        generated by the git-prompt machinery.  e.g.
+#        Bash: PROMPT_COMMAND='__git_ps1 "\u@\h:\w" "\\\$ "'
+#          will show username, at-sign, host, colon, cwd, then
+#          various status string, followed by dollar and SP, as
+#          your prompt.
+#        ZSH:  precmd () { __git_ps1 "%n" ":%~$ " "|%s" }
+#          will show username, pipe, then various status string,
+#          followed by colon, cwd, dollar and SP, as your prompt.
+#        Optionally, you can supply a third argument with a printf
+#        format string to finetune the output of the branch status
+#
+# The repository status will be displayed only if you are currently in a
+# git repository. The %s token is the placeholder for the shown status.
+#
+# The prompt status always includes the current branch name.
+#
+# In addition, if you set GIT_PS1_SHOWDIRTYSTATE to a nonempty value,
+# unstaged (*) and staged (+) changes will be shown next to the branch
+# name.  You can configure this per-repository with the
+# bash.showDirtyState variable, which defaults to true once
+# GIT_PS1_SHOWDIRTYSTATE is enabled.
+#
+# You can also see if currently something is stashed, by setting
+# GIT_PS1_SHOWSTASHSTATE to a nonempty value. If something is stashed,
+# then a '$' will be shown next to the branch name.
+#
+# If you would like to see if there're untracked files, then you can set
+# GIT_PS1_SHOWUNTRACKEDFILES to a nonempty value. If there're untracked
+# files, then a '%' will be shown next to the branch name.  You can
+# configure this per-repository with the bash.showUntrackedFiles
+# variable, which defaults to true once GIT_PS1_SHOWUNTRACKEDFILES is
+# enabled.
+#
+# If you would like to see the difference between HEAD and its upstream,
+# set GIT_PS1_SHOWUPSTREAM="auto".  A "<" indicates you are behind, ">"
+# indicates you are ahead, "<>" indicates you have diverged and "="
+# indicates that there is no difference. You can further control
+# behaviour by setting GIT_PS1_SHOWUPSTREAM to a space-separated list
+# of values:
+#
+#     verbose       show number of commits ahead/behind (+/-) upstream
+#     name          if verbose, then also show the upstream abbrev name
+#     legacy        don't use the '--count' option available in recent
+#                   versions of git-rev-list
+#     git           always compare HEAD to @{upstream}
+#     svn           always compare HEAD to your SVN upstream
+#
+# By default, __git_ps1 will compare HEAD to your SVN upstream if it can
+# find one, or @{upstream} otherwise.  Once you have set
+# GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
+# setting the bash.showUpstream config variable.
+#
+# You can change the separator between the branch name and the above
+# state symbols by setting GIT_PS1_STATESEPARATOR. The default separator
+# is SP.
+#
+# When there is an in-progress operation such as a merge, rebase,
+# revert, cherry-pick, or bisect, the prompt will include information
+# related to the operation, often in the form "|<OPERATION-NAME>".
+#
+# When the repository has a sparse-checkout, a notification of the form
+# "|SPARSE" will be included in the prompt.  This can be shortened to a
+# single '?' character by setting GIT_PS1_COMPRESSSPARSESTATE, or omitted
+# by setting GIT_PS1_OMITSPARSESTATE.
+#
+# If you would like to see a notification on the prompt when there are
+# unresolved conflicts, set GIT_PS1_SHOWCONFLICTSTATE to "yes". The
+# prompt will include "|CONFLICT".
+#
+# If you would like to see more information about the identity of
+# commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE
+# to one of these values:
+#
+#     contains      relative to newer annotated tag (v1.6.3.2~35)
+#     branch        relative to newer tag or branch (master~4)
+#     describe      relative to older annotated tag (v1.6.3.1-13-gdd42c2f)
+#     tag           relative to any older tag (v1.6.3.1-13-gdd42c2f)
+#     default       exactly matching tag
+#
+# If you would like a colored hint about the current dirty state, set
+# GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on
+# the colored output of "git status -sb".
+#
+# If you would like __git_ps1 to do nothing in the case when the current
+# directory is set up to be ignored by git, then set
+# GIT_PS1_HIDE_IF_PWD_IGNORED to a nonempty value. Override this on the
+# repository level by setting bash.hideIfPwdIgnored to "false".
+
+# check whether printf supports -v
+__git_printf_supports_v=
+printf -v __git_printf_supports_v -- '%s' yes >/dev/null 2>&1
+
+# stores the divergence from upstream in $p
+# used by GIT_PS1_SHOWUPSTREAM
+__git_ps1_show_upstream ()
+{
+	local key value
+	local svn_remote svn_url_pattern count n
+	local upstream_type=git legacy="" verbose="" name=""
+
+	svn_remote=()
+	# get some config options from git-config
+	local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
+	while read -r key value; do
+		case "$key" in
+		bash.showupstream)
+			GIT_PS1_SHOWUPSTREAM="$value"
+			if [[ -z "${GIT_PS1_SHOWUPSTREAM}" ]]; then
+				p=""
+				return
+			fi
+			;;
+		svn-remote.*.url)
+			svn_remote[$((${#svn_remote[@]} + 1))]="$value"
+			svn_url_pattern="$svn_url_pattern\\|$value"
+			upstream_type=svn+git # default upstream type is SVN if available, else git
+			;;
+		esac
+	done <<< "$output"
+
+	# parse configuration values
+	local option
+	for option in ${GIT_PS1_SHOWUPSTREAM}; do
+		case "$option" in
+		git|svn) upstream_type="$option" ;;
+		verbose) verbose=1 ;;
+		legacy)  legacy=1  ;;
+		name)    name=1 ;;
+		esac
+	done
+
+	# Find our upstream type
+	case "$upstream_type" in
+	git)    upstream_type="@{upstream}" ;;
+	svn*)
+		# get the upstream from the "git-svn-id: ..." in a commit message
+		# (git-svn uses essentially the same procedure internally)
+		local -a svn_upstream
+		svn_upstream=($(git log --first-parent -1 \
+					--grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null))
+		if [[ 0 -ne ${#svn_upstream[@]} ]]; then
+			svn_upstream=${svn_upstream[${#svn_upstream[@]} - 2]}
+			svn_upstream=${svn_upstream%@*}
+			local n_stop="${#svn_remote[@]}"
+			for ((n=1; n <= n_stop; n++)); do
+				svn_upstream=${svn_upstream#${svn_remote[$n]}}
+			done
+
+			if [[ -z "$svn_upstream" ]]; then
+				# default branch name for checkouts with no layout:
+				upstream_type=${GIT_SVN_ID:-git-svn}
+			else
+				upstream_type=${svn_upstream#/}
+			fi
+		elif [[ "svn+git" = "$upstream_type" ]]; then
+			upstream_type="@{upstream}"
+		fi
+		;;
+	esac
+
+	# Find how many commits we are ahead/behind our upstream
+	if [[ -z "$legacy" ]]; then
+		count="$(git rev-list --count --left-right \
+				"$upstream_type"...HEAD 2>/dev/null)"
+	else
+		# produce equivalent output to --count for older versions of git
+		local commits
+		if commits="$(git rev-list --left-right "$upstream_type"...HEAD 2>/dev/null)"
+		then
+			local commit behind=0 ahead=0
+			for commit in $commits
+			do
+				case "$commit" in
+				"<"*) ((behind++)) ;;
+				*)    ((ahead++))  ;;
+				esac
+			done
+			count="$behind	$ahead"
+		else
+			count=""
+		fi
+	fi
+
+	# calculate the result
+	if [[ -z "$verbose" ]]; then
+		case "$count" in
+		"") # no upstream
+			p="" ;;
+		"0	0") # equal to upstream
+			p="=" ;;
+		"0	"*) # ahead of upstream
+			p=">" ;;
+		*"	0") # behind upstream
+			p="<" ;;
+		*)	    # diverged from upstream
+			p="<>" ;;
+		esac
+	else # verbose, set upstream instead of p
+		case "$count" in
+		"") # no upstream
+			upstream="" ;;
+		"0	0") # equal to upstream
+			upstream="|u=" ;;
+		"0	"*) # ahead of upstream
+			upstream="|u+${count#0	}" ;;
+		*"	0") # behind upstream
+			upstream="|u-${count%	0}" ;;
+		*)	    # diverged from upstream
+			upstream="|u+${count#*	}-${count%	*}" ;;
+		esac
+		if [[ -n "$count" && -n "$name" ]]; then
+			__git_ps1_upstream_name=$(git rev-parse \
+				--abbrev-ref "$upstream_type" 2>/dev/null)
+			if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
+				upstream="$upstream \${__git_ps1_upstream_name}"
+			else
+				upstream="$upstream ${__git_ps1_upstream_name}"
+				# not needed anymore; keep user's
+				# environment clean
+				unset __git_ps1_upstream_name
+			fi
+		fi
+	fi
+
+}
+
+# Helper function that is meant to be called from __git_ps1.  It
+# injects color codes into the appropriate gitstring variables used
+# to build a gitstring. Colored variables are responsible for clearing
+# their own color.
+__git_ps1_colorize_gitstring ()
+{
+	if [[ -n ${ZSH_VERSION-} ]]; then
+		local c_red='%F{red}'
+		local c_green='%F{green}'
+		local c_lblue='%F{blue}'
+		local c_clear='%f'
+	else
+		# Using \001 and \002 around colors is necessary to prevent
+		# issues with command line editing/browsing/completion!
+		local c_red=$'\001\e[31m\002'
+		local c_green=$'\001\e[32m\002'
+		local c_lblue=$'\001\e[1;34m\002'
+		local c_clear=$'\001\e[0m\002'
+	fi
+	local bad_color=$c_red
+	local ok_color=$c_green
+	local flags_color="$c_lblue"
+
+	local branch_color=""
+	if [ $detached = no ]; then
+		branch_color="$ok_color"
+	else
+		branch_color="$bad_color"
+	fi
+	if [ -n "$c" ]; then
+		c="$branch_color$c$c_clear"
+	fi
+	b="$branch_color$b$c_clear"
+
+	if [ -n "$w" ]; then
+		w="$bad_color$w$c_clear"
+	fi
+	if [ -n "$i" ]; then
+		i="$ok_color$i$c_clear"
+	fi
+	if [ -n "$s" ]; then
+		s="$flags_color$s$c_clear"
+	fi
+	if [ -n "$u" ]; then
+		u="$bad_color$u$c_clear"
+	fi
+}
+
+# Helper function to read the first line of a file into a variable.
+# __git_eread requires 2 arguments, the file path and the name of the
+# variable, in that order.
+__git_eread ()
+{
+	test -r "$1" && IFS=$'\r\n' read -r "$2" <"$1"
+}
+
+# see if a cherry-pick or revert is in progress, if the user has committed a
+# conflict resolution with 'git commit' in the middle of a sequence of picks or
+# reverts then CHERRY_PICK_HEAD/REVERT_HEAD will not exist so we have to read
+# the todo file.
+__git_sequencer_status ()
+{
+	local todo
+	if test -f "$g/CHERRY_PICK_HEAD"
+	then
+		r="|CHERRY-PICKING"
+		return 0;
+	elif test -f "$g/REVERT_HEAD"
+	then
+		r="|REVERTING"
+		return 0;
+	elif __git_eread "$g/sequencer/todo" todo
+	then
+		case "$todo" in
+		p[\ \	]|pick[\ \	]*)
+			r="|CHERRY-PICKING"
+			return 0
+		;;
+		revert[\ \	]*)
+			r="|REVERTING"
+			return 0
+		;;
+		esac
+	fi
+	return 1
+}
+
+# __git_ps1 accepts 0 or 1 arguments (i.e., format string)
+# when called from PS1 using command substitution
+# in this mode it prints text to add to bash PS1 prompt (includes branch name)
+#
+# __git_ps1 requires 2 or 3 arguments when called from PROMPT_COMMAND (pc)
+# in that case it _sets_ PS1. The arguments are parts of a PS1 string.
+# when two arguments are given, the first is prepended and the second appended
+# to the state string when assigned to PS1.
+# The optional third parameter will be used as printf format string to further
+# customize the output of the git-status string.
+# In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
+__git_ps1 ()
+{
+	# preserve exit status
+	local exit=$?
+	local pcmode=no
+	local detached=no
+	local ps1pc_start='\u@\h:\w '
+	local ps1pc_end='\$ '
+	local printf_format=' (%s)'
+
+	case "$#" in
+		2|3)	pcmode=yes
+			ps1pc_start="$1"
+			ps1pc_end="$2"
+			printf_format="${3:-$printf_format}"
+			# set PS1 to a plain prompt so that we can
+			# simply return early if the prompt should not
+			# be decorated
+			PS1="$ps1pc_start$ps1pc_end"
+		;;
+		0|1)	printf_format="${1:-$printf_format}"
+		;;
+		*)	return $exit
+		;;
+	esac
+
+	# ps1_expanded:  This variable is set to 'yes' if the shell
+	# subjects the value of PS1 to parameter expansion:
+	#
+	#   * bash does unless the promptvars option is disabled
+	#   * zsh does not unless the PROMPT_SUBST option is set
+	#   * POSIX shells always do
+	#
+	# If the shell would expand the contents of PS1 when drawing
+	# the prompt, a raw ref name must not be included in PS1.
+	# This protects the user from arbitrary code execution via
+	# specially crafted ref names.  For example, a ref named
+	# 'refs/heads/$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)' might cause the
+	# shell to execute 'sudo rm -rf /' when the prompt is drawn.
+	#
+	# Instead, the ref name should be placed in a separate global
+	# variable (in the __git_ps1_* namespace to avoid colliding
+	# with the user's environment) and that variable should be
+	# referenced from PS1.  For example:
+	#
+	#     __git_ps1_foo=$(do_something_to_get_ref_name)
+	#     PS1="...stuff...\${__git_ps1_foo}...stuff..."
+	#
+	# If the shell does not expand the contents of PS1, the raw
+	# ref name must be included in PS1.
+	#
+	# The value of this variable is only relevant when in pcmode.
+	#
+	# Assume that the shell follows the POSIX specification and
+	# expands PS1 unless determined otherwise.  (This is more
+	# likely to be correct if the user has a non-bash, non-zsh
+	# shell and safer than the alternative if the assumption is
+	# incorrect.)
+	#
+	local ps1_expanded=yes
+	[ -z "${ZSH_VERSION-}" ] || [[ -o PROMPT_SUBST ]] || ps1_expanded=no
+	[ -z "${BASH_VERSION-}" ] || shopt -q promptvars || ps1_expanded=no
+
+	local repo_info rev_parse_exit_code
+	repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
+		--is-bare-repository --is-inside-work-tree \
+		--short HEAD 2>/dev/null)"
+	rev_parse_exit_code="$?"
+
+	if [ -z "$repo_info" ]; then
+		return $exit
+	fi
+
+	local short_sha=""
+	if [ "$rev_parse_exit_code" = "0" ]; then
+		short_sha="${repo_info##*$'\n'}"
+		repo_info="${repo_info%$'\n'*}"
+	fi
+	local inside_worktree="${repo_info##*$'\n'}"
+	repo_info="${repo_info%$'\n'*}"
+	local bare_repo="${repo_info##*$'\n'}"
+	repo_info="${repo_info%$'\n'*}"
+	local inside_gitdir="${repo_info##*$'\n'}"
+	local g="${repo_info%$'\n'*}"
+
+	if [ "true" = "$inside_worktree" ] &&
+	   [ -n "${GIT_PS1_HIDE_IF_PWD_IGNORED-}" ] &&
+	   [ "$(git config --bool bash.hideIfPwdIgnored)" != "false" ] &&
+	   git check-ignore -q .
+	then
+		return $exit
+	fi
+
+	local sparse=""
+	if [ -z "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
+	   [ -z "${GIT_PS1_OMITSPARSESTATE-}" ] &&
+	   [ "$(git config --bool core.sparseCheckout)" = "true" ]; then
+		sparse="|SPARSE"
+	fi
+
+	local r=""
+	local b=""
+	local step=""
+	local total=""
+	if [ -d "$g/rebase-merge" ]; then
+		__git_eread "$g/rebase-merge/head-name" b
+		__git_eread "$g/rebase-merge/msgnum" step
+		__git_eread "$g/rebase-merge/end" total
+		r="|REBASE"
+	else
+		if [ -d "$g/rebase-apply" ]; then
+			__git_eread "$g/rebase-apply/next" step
+			__git_eread "$g/rebase-apply/last" total
+			if [ -f "$g/rebase-apply/rebasing" ]; then
+				__git_eread "$g/rebase-apply/head-name" b
+				r="|REBASE"
+			elif [ -f "$g/rebase-apply/applying" ]; then
+				r="|AM"
+			else
+				r="|AM/REBASE"
+			fi
+		elif [ -f "$g/MERGE_HEAD" ]; then
+			r="|MERGING"
+		elif __git_sequencer_status; then
+			:
+		elif [ -f "$g/BISECT_LOG" ]; then
+			r="|BISECTING"
+		fi
+
+		if [ -n "$b" ]; then
+			:
+		elif [ -h "$g/HEAD" ]; then
+			# symlink symbolic ref
+			b="$(git symbolic-ref HEAD 2>/dev/null)"
+		else
+			local head=""
+			if ! __git_eread "$g/HEAD" head; then
+				return $exit
+			fi
+			# is it a symbolic ref?
+			b="${head#ref: }"
+			if [ "$head" = "$b" ]; then
+				detached=yes
+				b="$(
+				case "${GIT_PS1_DESCRIBE_STYLE-}" in
+				(contains)
+					git describe --contains HEAD ;;
+				(branch)
+					git describe --contains --all HEAD ;;
+				(tag)
+					git describe --tags HEAD ;;
+				(describe)
+					git describe HEAD ;;
+				(* | default)
+					git describe --tags --exact-match HEAD ;;
+				esac 2>/dev/null)" ||
+
+				b="$short_sha..."
+				b="($b)"
+			fi
+		fi
+	fi
+
+	if [ -n "$step" ] && [ -n "$total" ]; then
+		r="$r $step/$total"
+	fi
+
+	local conflict="" # state indicator for unresolved conflicts
+	if [[ "${GIT_PS1_SHOWCONFLICTSTATE}" == "yes" ]] &&
+	   [[ $(git ls-files --unmerged 2>/dev/null) ]]; then
+		conflict="|CONFLICT"
+	fi
+
+	local w=""
+	local i=""
+	local s=""
+	local u=""
+	local h=""
+	local c=""
+	local p="" # short version of upstream state indicator
+	local upstream="" # verbose version of upstream state indicator
+
+	if [ "true" = "$inside_gitdir" ]; then
+		if [ "true" = "$bare_repo" ]; then
+			c="BARE:"
+		else
+			b="GIT_DIR!"
+		fi
+	elif [ "true" = "$inside_worktree" ]; then
+		if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
+		   [ "$(git config --bool bash.showDirtyState)" != "false" ]
+		then
+			git diff --no-ext-diff --quiet || w="*"
+			git diff --no-ext-diff --cached --quiet || i="+"
+			if [ -z "$short_sha" ] && [ -z "$i" ]; then
+				i="#"
+			fi
+		fi
+		if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ] &&
+		   git rev-parse --verify --quiet refs/stash >/dev/null
+		then
+			s="$"
+		fi
+
+		if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ] &&
+		   [ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
+		   git ls-files --others --exclude-standard --directory --no-empty-directory --error-unmatch -- ':/*' >/dev/null 2>/dev/null
+		then
+			u="%${ZSH_VERSION+%}"
+		fi
+
+		if [ -n "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
+		   [ "$(git config --bool core.sparseCheckout)" = "true" ]; then
+			h="?"
+		fi
+
+		if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then
+			__git_ps1_show_upstream
+		fi
+	fi
+
+	local z="${GIT_PS1_STATESEPARATOR-" "}"
+
+	b=${b##refs/heads/}
+	if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
+		__git_ps1_branch_name=$b
+		b="\${__git_ps1_branch_name}"
+	fi
+
+	if [ -n "${GIT_PS1_SHOWCOLORHINTS-}" ]; then
+		__git_ps1_colorize_gitstring
+	fi
+
+	local f="$h$w$i$s$u$p"
+	local gitstring="$c$b${f:+$z$f}${sparse}$r${upstream}${conflict}"
+
+	if [ $pcmode = yes ]; then
+		if [ "${__git_printf_supports_v-}" != yes ]; then
+			gitstring=$(printf -- "$printf_format" "$gitstring")
+		else
+			printf -v gitstring -- "$printf_format" "$gitstring"
+		fi
+		PS1="$ps1pc_start$gitstring$ps1pc_end"
+	else
+		printf -- "$printf_format" "$gitstring"
+	fi
+
+	return $exit
+}
-- 
cgit v1.2.3