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-rwxr-xr-xgit-mergetool.sh529
1 files changed, 529 insertions, 0 deletions
diff --git a/git-mergetool.sh b/git-mergetool.sh
new file mode 100755
index 0000000..e3f6d54
--- /dev/null
+++ b/git-mergetool.sh
@@ -0,0 +1,529 @@
+#!/bin/sh
+#
+# This program resolves merge conflicts in git
+#
+# Copyright (c) 2006 Theodore Y. Ts'o
+# Copyright (c) 2009-2016 David Aguilar
+#
+# This file is licensed under the GPL v2, or a later version
+# at the discretion of Junio C Hamano.
+#
+
+USAGE='[--tool=tool] [--tool-help] [-y|--no-prompt|--prompt] [-g|--gui|--no-gui] [-O<orderfile>] [file to merge] ...'
+SUBDIRECTORY_OK=Yes
+NONGIT_OK=Yes
+OPTIONS_SPEC=
+TOOL_MODE=merge
+. git-sh-setup
+. git-mergetool--lib
+
+# Returns true if the mode reflects a symlink
+is_symlink () {
+ test "$1" = 120000
+}
+
+is_submodule () {
+ test "$1" = 160000
+}
+
+local_present () {
+ test -n "$local_mode"
+}
+
+remote_present () {
+ test -n "$remote_mode"
+}
+
+base_present () {
+ test -n "$base_mode"
+}
+
+mergetool_tmpdir_init () {
+ if test "$(git config --bool mergetool.writeToTemp)" != true
+ then
+ MERGETOOL_TMPDIR=.
+ return 0
+ fi
+ if MERGETOOL_TMPDIR=$(mktemp -d -t "git-mergetool-XXXXXX" 2>/dev/null)
+ then
+ return 0
+ fi
+ die "error: mktemp is needed when 'mergetool.writeToTemp' is true"
+}
+
+cleanup_temp_files () {
+ if test "$1" = --save-backup
+ then
+ rm -rf -- "$MERGED.orig"
+ test -e "$BACKUP" && mv -- "$BACKUP" "$MERGED.orig"
+ rm -f -- "$LOCAL" "$REMOTE" "$BASE"
+ else
+ rm -f -- "$LOCAL" "$REMOTE" "$BASE" "$BACKUP"
+ fi
+ if test "$MERGETOOL_TMPDIR" != "."
+ then
+ rmdir "$MERGETOOL_TMPDIR"
+ fi
+}
+
+describe_file () {
+ mode="$1"
+ branch="$2"
+ file="$3"
+
+ printf " {%s}: " "$branch"
+ if test -z "$mode"
+ then
+ echo "deleted"
+ elif is_symlink "$mode"
+ then
+ echo "a symbolic link -> '$(cat "$file")'"
+ elif is_submodule "$mode"
+ then
+ echo "submodule commit $file"
+ elif base_present
+ then
+ echo "modified file"
+ else
+ echo "created file"
+ fi
+}
+
+resolve_symlink_merge () {
+ while true
+ do
+ printf "Use (l)ocal or (r)emote, or (a)bort? "
+ read ans || return 1
+ case "$ans" in
+ [lL]*)
+ git checkout-index -f --stage=2 -- "$MERGED"
+ git add -- "$MERGED"
+ cleanup_temp_files --save-backup
+ return 0
+ ;;
+ [rR]*)
+ git checkout-index -f --stage=3 -- "$MERGED"
+ git add -- "$MERGED"
+ cleanup_temp_files --save-backup
+ return 0
+ ;;
+ [aA]*)
+ return 1
+ ;;
+ esac
+ done
+}
+
+resolve_deleted_merge () {
+ while true
+ do
+ if base_present
+ then
+ printf "Use (m)odified or (d)eleted file, or (a)bort? "
+ else
+ printf "Use (c)reated or (d)eleted file, or (a)bort? "
+ fi
+ read ans || return 1
+ case "$ans" in
+ [mMcC]*)
+ git add -- "$MERGED"
+ if test "$merge_keep_backup" = "true"
+ then
+ cleanup_temp_files --save-backup
+ else
+ cleanup_temp_files
+ fi
+ return 0
+ ;;
+ [dD]*)
+ git rm -- "$MERGED" > /dev/null
+ cleanup_temp_files
+ return 0
+ ;;
+ [aA]*)
+ if test "$merge_keep_temporaries" = "false"
+ then
+ cleanup_temp_files
+ fi
+ return 1
+ ;;
+ esac
+ done
+}
+
+resolve_submodule_merge () {
+ while true
+ do
+ printf "Use (l)ocal or (r)emote, or (a)bort? "
+ read ans || return 1
+ case "$ans" in
+ [lL]*)
+ if ! local_present
+ then
+ if test -n "$(git ls-tree HEAD -- "$MERGED")"
+ then
+ # Local isn't present, but it's a subdirectory
+ git ls-tree --full-name -r HEAD -- "$MERGED" |
+ git update-index --index-info || exit $?
+ else
+ test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
+ git update-index --force-remove "$MERGED"
+ cleanup_temp_files --save-backup
+ fi
+ elif is_submodule "$local_mode"
+ then
+ stage_submodule "$MERGED" "$local_sha1"
+ else
+ git checkout-index -f --stage=2 -- "$MERGED"
+ git add -- "$MERGED"
+ fi
+ return 0
+ ;;
+ [rR]*)
+ if ! remote_present
+ then
+ if test -n "$(git ls-tree MERGE_HEAD -- "$MERGED")"
+ then
+ # Remote isn't present, but it's a subdirectory
+ git ls-tree --full-name -r MERGE_HEAD -- "$MERGED" |
+ git update-index --index-info || exit $?
+ else
+ test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
+ git update-index --force-remove "$MERGED"
+ fi
+ elif is_submodule "$remote_mode"
+ then
+ ! is_submodule "$local_mode" &&
+ test -e "$MERGED" &&
+ mv -- "$MERGED" "$BACKUP"
+ stage_submodule "$MERGED" "$remote_sha1"
+ else
+ test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
+ git checkout-index -f --stage=3 -- "$MERGED"
+ git add -- "$MERGED"
+ fi
+ cleanup_temp_files --save-backup
+ return 0
+ ;;
+ [aA]*)
+ return 1
+ ;;
+ esac
+ done
+}
+
+stage_submodule () {
+ path="$1"
+ submodule_sha1="$2"
+ mkdir -p "$path" ||
+ die "fatal: unable to create directory for module at $path"
+ # Find $path relative to work tree
+ work_tree_root=$(cd_to_toplevel && pwd)
+ work_rel_path=$(cd "$path" &&
+ GIT_WORK_TREE="${work_tree_root}" git rev-parse --show-prefix
+ )
+ test -n "$work_rel_path" ||
+ die "fatal: unable to get path of module $path relative to work tree"
+ git update-index --add --replace --cacheinfo 160000 "$submodule_sha1" "${work_rel_path%/}" || die
+}
+
+checkout_staged_file () {
+ tmpfile="$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" &&
+ tmpfile=${tmpfile%%' '*}
+
+ if test $? -eq 0 && test -n "$tmpfile"
+ then
+ mv -- "$(git rev-parse --show-cdup)$tmpfile" "$3"
+ else
+ >"$3"
+ fi
+}
+
+merge_file () {
+ MERGED="$1"
+
+ f=$(git ls-files -u -- "$MERGED")
+ if test -z "$f"
+ then
+ if test ! -f "$MERGED"
+ then
+ echo "$MERGED: file not found"
+ else
+ echo "$MERGED: file does not need merging"
+ fi
+ return 1
+ fi
+
+ # extract file extension from the last path component
+ case "${MERGED##*/}" in
+ *.*)
+ ext=.${MERGED##*.}
+ BASE=${MERGED%"$ext"}
+ ;;
+ *)
+ BASE=$MERGED
+ ext=
+ esac
+
+ mergetool_tmpdir_init
+
+ if test "$MERGETOOL_TMPDIR" != "."
+ then
+ # If we're using a temporary directory then write to the
+ # top-level of that directory.
+ BASE=${BASE##*/}
+ fi
+
+ BACKUP="$MERGETOOL_TMPDIR/${BASE}_BACKUP_$$$ext"
+ LOCAL="$MERGETOOL_TMPDIR/${BASE}_LOCAL_$$$ext"
+ REMOTE="$MERGETOOL_TMPDIR/${BASE}_REMOTE_$$$ext"
+ BASE="$MERGETOOL_TMPDIR/${BASE}_BASE_$$$ext"
+
+ base_mode= local_mode= remote_mode=
+
+ # here, $IFS is just a LF
+ for line in $f
+ do
+ mode=${line%% *} # 1st word
+ sha1=${line#"$mode "}
+ sha1=${sha1%% *} # 2nd word
+ case "${line#$mode $sha1 }" in # remainder
+ '1 '*)
+ base_mode=$mode
+ ;;
+ '2 '*)
+ local_mode=$mode local_sha1=$sha1
+ ;;
+ '3 '*)
+ remote_mode=$mode remote_sha1=$sha1
+ ;;
+ esac
+ done
+
+ if is_submodule "$local_mode" || is_submodule "$remote_mode"
+ then
+ echo "Submodule merge conflict for '$MERGED':"
+ describe_file "$local_mode" "local" "$local_sha1"
+ describe_file "$remote_mode" "remote" "$remote_sha1"
+ resolve_submodule_merge
+ return
+ fi
+
+ if test -f "$MERGED"
+ then
+ mv -- "$MERGED" "$BACKUP"
+ cp -- "$BACKUP" "$MERGED"
+ fi
+ # Create a parent directory to handle delete/delete conflicts
+ # where the base's directory no longer exists.
+ mkdir -p "$(dirname "$MERGED")"
+
+ checkout_staged_file 1 "$MERGED" "$BASE"
+ checkout_staged_file 2 "$MERGED" "$LOCAL"
+ checkout_staged_file 3 "$MERGED" "$REMOTE"
+
+ if test -z "$local_mode" || test -z "$remote_mode"
+ then
+ echo "Deleted merge conflict for '$MERGED':"
+ describe_file "$local_mode" "local" "$LOCAL"
+ describe_file "$remote_mode" "remote" "$REMOTE"
+ resolve_deleted_merge
+ status=$?
+ rmdir -p "$(dirname "$MERGED")" 2>/dev/null
+ return $status
+ fi
+
+ if is_symlink "$local_mode" || is_symlink "$remote_mode"
+ then
+ echo "Symbolic link merge conflict for '$MERGED':"
+ describe_file "$local_mode" "local" "$LOCAL"
+ describe_file "$remote_mode" "remote" "$REMOTE"
+ resolve_symlink_merge
+ return
+ fi
+
+ echo "Normal merge conflict for '$MERGED':"
+ describe_file "$local_mode" "local" "$LOCAL"
+ describe_file "$remote_mode" "remote" "$REMOTE"
+ if test "$guessed_merge_tool" = true || test "$prompt" = true
+ then
+ printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
+ read ans || return 1
+ fi
+
+ if base_present
+ then
+ present=true
+ else
+ present=false
+ fi
+
+ if ! run_merge_tool "$merge_tool" "$present"
+ then
+ echo "merge of $MERGED failed" 1>&2
+ mv -- "$BACKUP" "$MERGED"
+
+ if test "$merge_keep_temporaries" = "false"
+ then
+ cleanup_temp_files
+ fi
+
+ return 1
+ fi
+
+ if test "$merge_keep_backup" = "true"
+ then
+ mv -- "$BACKUP" "$MERGED.orig"
+ else
+ rm -- "$BACKUP"
+ fi
+
+ git add -- "$MERGED"
+ cleanup_temp_files
+ return 0
+}
+
+prompt_after_failed_merge () {
+ while true
+ do
+ printf "Continue merging other unresolved paths [y/n]? "
+ read ans || return 1
+ case "$ans" in
+ [yY]*)
+ return 0
+ ;;
+ [nN]*)
+ return 1
+ ;;
+ esac
+ done
+}
+
+print_noop_and_exit () {
+ echo "No files need merging"
+ exit 0
+}
+
+main () {
+ prompt=$(git config --bool mergetool.prompt)
+ GIT_MERGETOOL_GUI=false
+ guessed_merge_tool=false
+ orderfile=
+
+ while test $# != 0
+ do
+ case "$1" in
+ --tool-help=*)
+ TOOL_MODE=${1#--tool-help=}
+ show_tool_help
+ ;;
+ --tool-help)
+ show_tool_help
+ ;;
+ -t|--tool*)
+ case "$#,$1" in
+ *,*=*)
+ merge_tool=${1#*=}
+ ;;
+ 1,*)
+ usage ;;
+ *)
+ merge_tool="$2"
+ shift ;;
+ esac
+ ;;
+ --no-gui)
+ GIT_MERGETOOL_GUI=false
+ ;;
+ -g|--gui)
+ GIT_MERGETOOL_GUI=true
+ ;;
+ -y|--no-prompt)
+ prompt=false
+ ;;
+ --prompt)
+ prompt=true
+ ;;
+ -O*)
+ orderfile="${1#-O}"
+ ;;
+ --)
+ shift
+ break
+ ;;
+ -*)
+ usage
+ ;;
+ *)
+ break
+ ;;
+ esac
+ shift
+ done
+
+ git_dir_init
+ require_work_tree
+
+ if test -z "$merge_tool"
+ then
+ if ! merge_tool=$(get_merge_tool)
+ then
+ guessed_merge_tool=true
+ fi
+ fi
+ merge_keep_backup="$(git config --bool mergetool.keepBackup || echo true)"
+ merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)"
+
+ prefix=$(git rev-parse --show-prefix) || exit 1
+ cd_to_toplevel
+
+ if test -n "$orderfile"
+ then
+ orderfile=$(
+ git rev-parse --prefix "$prefix" -- "$orderfile" |
+ sed -e 1d
+ )
+ fi
+
+ if test $# -eq 0 && test -e "$GIT_DIR/MERGE_RR"
+ then
+ set -- $(git rerere remaining)
+ if test $# -eq 0
+ then
+ print_noop_and_exit
+ fi
+ elif test $# -ge 0
+ then
+ # rev-parse provides the -- needed for 'set'
+ eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"
+ fi
+
+ files=$(git -c core.quotePath=false \
+ diff --name-only --diff-filter=U \
+ ${orderfile:+"-O$orderfile"} -- "$@")
+
+ if test -z "$files"
+ then
+ print_noop_and_exit
+ fi
+
+ printf "Merging:\n"
+ printf "%s\n" "$files"
+
+ rc=0
+ set -- $files
+ while test $# -ne 0
+ do
+ printf "\n"
+ if ! merge_file "$1"
+ then
+ rc=1
+ test $# -ne 1 && prompt_after_failed_merge || exit 1
+ fi
+ shift
+ done
+
+ exit $rc
+}
+
+main "$@"
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