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Diffstat (limited to '.github/changelog.sh')
| -rw-r--r-- | .github/changelog.sh | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/.github/changelog.sh b/.github/changelog.sh new file mode 100644 index 0000000..2d43826 --- /dev/null +++ b/.github/changelog.sh @@ -0,0 +1,435 @@ +#!/usr/bin/env zsh + +############################## +# CHANGELOG SCRIPT CONSTANTS # +############################## + +#* Holds the list of valid types recognized in a commit subject +#* and the display string of such type +local -A TYPES +TYPES=( + BUILD "Build system" + CHORE "Chore" + CI "CI" + CUT "Features removed" + DOC "Documentation" + FEAT "Features" + FIX "Bug fixes" + LICENSE "License update" + MAKE "Build system" + OPTIMIZE "Code optimization" + PERF "Performance" + REFACTOR "Code Refactoring" + REFORMAT "Code Reformating" + REVERT "Revert" + TEST "Testing" +) + +#* Types that will be displayed in their own section, +#* in the order specified here. +local -a MAIN_TYPES +MAIN_TYPES=(FEAT FIX PERF REFACTOR DOCS DOC) + +#* Types that will be displayed under the category of other changes +local -a OTHER_TYPES +OTHER_TYPES=(MAKE TEST STYLE CI OTHER) + +#* Commit types that don't appear in $MAIN_TYPES nor $OTHER_TYPES +#* will not be displayed and will simply be ignored. + + +############################ +# COMMIT PARSING UTILITIES # +############################ + +function parse-commit { + + # This function uses the following globals as output: commits (A), + # subjects (A), scopes (A) and breaking (A). All associative arrays (A) + # have $hash as the key. + # - commits holds the commit type + # - subjects holds the commit subject + # - scopes holds the scope of a commit + # - breaking holds the breaking change warning if a commit does + # make a breaking change + + function commit:type { + local commit_message="$1" + local type="$(sed -E 's/^([a-zA-Z_\-]+)(\(.+\))?!?: .+$/\1/' <<< "$commit_message"| tr '[:lower:]' '[:upper:]')" + # If $type doesn't appear in $TYPES array mark it as 'other' + if [[ -n "${(k)TYPES[(i)${type}]}" ]]; then + echo $type + else + echo other + fi + } + + function commit:scope { + local scope + + # Try to find scope in "type(<scope>):" format + # Scope will be formatted in lower cases + scope=$(sed -nE 's/^[a-zA-Z_\-]+\((.+)\)!?: .+$/\1/p' <<< "$1") + if [[ -n "$scope" ]]; then + echo "$scope" | tr '[:upper:]' '[:lower:]' + return + fi + + # If no scope found, try to find it in "<scope>:" format + # Make sure it's not a type before printing it + scope=$(sed -nE 's/^([a-zA-Z_\-]+): .+$/\1/p' <<< "$1") + if [[ -z "${(k)TYPES[(i)$scope]}" ]]; then + echo "$scope" + fi + } + + function commit:subject { + # Only display the relevant part of the commit, i.e. if it has the format + # type[(scope)!]: subject, where the part between [] is optional, only + # displays subject. If it doesn't match the format, returns the whole string. + sed -E 's/^[a-zA-Z_\-]+(\(.+\))?!?: (.+)$/\2/' <<< "$1" + } + + # Return subject if the body or subject match the breaking change format + function commit:is-breaking { + local subject="$1" body="$2" message + + if [[ "$body" =~ "BREAKING CHANGE: (.*)" || \ + "$subject" =~ '^[^ :\)]+\)?!: (.*)$' ]]; then + message="${match[1]}" + # remove CR characters (might be inserted in GitHub UI commit description form) + message="${message//$'\r'/}" + # skip next paragraphs (separated by two newlines or more) + message="${message%%$'\n\n'*}" + # ... and replace newlines with spaces + echo "${message//$'\n'/ }" + else + return 1 + fi + } + + # Return truncated hash of the reverted commit + function commit:is-revert { + local subject="$1" body="$2" + + if [[ "$subject" = Revert* && \ + "$body" =~ "This reverts commit ([^.]+)\." ]]; then + echo "${match[1]:0:7}" + else + return 1 + fi + } + + # Parse commit with hash $1 + local hash="$1" subject body warning rhash + subject="$(command git show -s --format=%s $hash)" + body="$(command git show -s --format=%b $hash)" + + # Commits following Conventional Commits (https://www.conventionalcommits.org/) + # have the following format, where parts between [] are optional: + # + # type[(scope)][!]: subject + # + # commit body + # [BREAKING CHANGE: warning] + + # commits holds the commit type + commits[$hash]="$(commit:type "$subject")" + # scopes holds the commit scope + scopes[$hash]="$(commit:scope "$subject")" + # subjects holds the commit subject + subjects[$hash]="$(commit:subject "$subject")" + + # breaking holds whether a commit has breaking changes + # and its warning message if it does + if warning=$(commit:is-breaking "$subject" "$body"); then + breaking[$hash]="$warning" + fi + + # reverts holds commits reverted in the same release + if rhash=$(commit:is-revert "$subject" "$body"); then + reverts[$hash]=$rhash + fi +} + +############################# +# RELEASE CHANGELOG DISPLAY # +############################# + +function display-release { + + # This function uses the following globals: output, version, + # commits (A), subjects (A), scopes (A), breaking (A) and reverts (A). + # + # - output is the output format to use when formatting (raw|text|md) + # - version is the version in which the commits are made + # - commits, subjects, scopes, breaking, and reverts are associative arrays + # with commit hashes as keys + + # Remove commits that were reverted + local hash rhash + for hash rhash in ${(kv)reverts}; do + if (( ${+commits[$rhash]} )); then + # Remove revert commit + unset "commits[$hash]" "subjects[$hash]" "scopes[$hash]" "breaking[$hash]" + # Remove reverted commit + unset "commits[$rhash]" "subjects[$rhash]" "scopes[$rhash]" "breaking[$rhash]" + fi + done + + # If no commits left skip displaying the release + if (( $#commits == 0 )); then + return + fi + + ##* Formatting functions + + # Format the hash according to output format + # If no parameter is passed, assume it comes from `$hash` + function fmt:hash { + #* Uses $hash from outer scope + local hash="${1:-$hash}" + case "$output" in + raw) printf "$hash" ;; + text) printf "\e[33m$hash\e[0m" ;; # red + md) printf "[\`$hash\`](https://github.com/aristanetworks/ansible-avd/commit/$hash)" ;; + esac + } + + # Format headers according to output format + # Levels 1 to 2 are considered special, the rest are formatted + # the same, except in md output format. + function fmt:header { + local header="$1" level="$2" + case "$output" in + raw) + case "$level" in + 1) printf "$header\n$(printf '%.0s=' {1..${#header}})\n\n" ;; + 2) printf "$header\n$(printf '%.0s-' {1..${#header}})\n\n" ;; + *) printf "$header:\n\n" ;; + esac ;; + text) + case "$level" in + 1|2) printf "\e[1;4m$header\e[0m\n\n" ;; # bold, underlined + *) printf "\e[1m$header:\e[0m\n\n" ;; # bold + esac ;; + md) printf "$(printf '%.0s#' {1..${level}}) $header\n\n" ;; + esac + } + + function fmt:scope { + #* Uses $scopes (A) and $hash from outer scope + local scope="${1:-${scopes[$hash]}}" + + # Get length of longest scope for padding + local max_scope=0 padding=0 + for hash in ${(k)scopes}; do + max_scope=$(( max_scope < ${#scopes[$hash]} ? ${#scopes[$hash]} : max_scope )) + done + + # If no scopes, exit the function + if [[ $max_scope -eq 0 ]]; then + return + fi + + # Get how much padding is required for this scope + padding=$(( max_scope < ${#scope} ? 0 : max_scope - ${#scope} )) + padding="${(r:$padding:: :):-}" + + # If no scope, print padding and 3 spaces (equivalent to "[] ") + if [[ -z "$scope" ]]; then + printf "${padding} " + return + fi + + # Print [scope] + case "$output" in + raw|md) printf "[$scope]${padding} " ;; + text) printf "[\e[38;5;9m$scope\e[0m]${padding} " ;; # red 9 + esac + } + + # If no parameter is passed, assume it comes from `$subjects[$hash]` + function fmt:subject { + #* Uses $subjects (A) and $hash from outer scope + local subject="${1:-${subjects[$hash]}}" + + # Capitalize first letter of the subject + subject="${(U)subject:0:1}${subject:1}" + + case "$output" in + raw) printf "$subject" ;; + # In text mode, highlight (#<issue>) and dim text between `backticks` + text) sed -E $'s|#([0-9]+)|\e[32m#\\1\e[0m|g;s|`([^`]+)`|`\e[2m\\1\e[0m`|g' <<< "$subject" ;; + # In markdown mode, link to (#<issue>) issues + md) sed -E 's|#([0-9]+)|[#\1](https://github.com/aristanetworks/ansible-avd/issues/\1)|g' <<< "$subject" ;; + esac + } + + function fmt:type { + #* Uses $type from outer scope + local type="${1:-${TYPES[$type]:-${(C)type}}}" + [[ -z "$type" ]] && return 0 + case "$output" in + raw|md) printf "$type: " ;; + text) printf "\e[4m$type\e[24m: " ;; # underlined + esac + } + + ##* Section functions + + function display:version { + fmt:header "$version" 2 + } + + function display:breaking { + (( $#breaking != 0 )) || return 0 + + case "$output" in + raw) fmt:header "BREAKING CHANGES" 3 ;; + text|md) fmt:header "⚠ BREAKING CHANGES" 3 ;; + esac + + local hash subject + for hash message in ${(kv)breaking}; do + echo " - $(fmt:hash) $(fmt:scope)$(fmt:subject "${message}")" + done | sort + echo + } + + function display:type { + local hash type="$1" + + local -a hashes + hashes=(${(k)commits[(R)$type]}) + + # If no commits found of type $type, go to next type + (( $#hashes != 0 )) || return 0 + + fmt:header "${TYPES[$type]}" 3 + for hash in $hashes; do + echo " - $(fmt:hash) $(fmt:scope)$(fmt:subject)" + done | sort -k3 # sort by scope + echo + } + + function display:others { + local hash type + + # Commits made under types considered other changes + local -A changes + changes=(${(kv)commits[(R)${(j:|:)OTHER_TYPES}]}) + + # If no commits found under "other" types, don't display anything + (( $#changes != 0 )) || return 0 + + fmt:header "Other changes" 3 + for hash type in ${(kv)changes}; do + case "$type" in + other) echo " - $(fmt:hash) $(fmt:scope)$(fmt:subject)" ;; + *) echo " - $(fmt:hash) $(fmt:scope)$(fmt:type)$(fmt:subject)" ;; + esac + done | sort -k3 # sort by scope + echo + } + + ##* Release sections order + + # Display version header + display:version + + # Display breaking changes first + display:breaking + + # Display changes for commit types in the order specified + for type in $MAIN_TYPES; do + display:type "$type" + done + + # Display other changes + display:others +} + +function main { + # $1 = until commit, $2 = since commit + local until="$1" since="$2" + + # $3 = output format (--text|--raw|--md) + # --md: uses markdown formatting + # --raw: outputs without style + # --text: uses ANSI escape codes to style the output + local output=${${3:-"--text"}#--*} + + if [[ -z "$until" ]]; then + until=HEAD + fi + + if [[ -z "$since" ]]; then + # If $since is not specified: + # 1) try to find the version used before updating + # 2) try to find the first version tag before $until + since=$(command git config --get ansible-avd.lastVersion 2>/dev/null) || \ + since=$(command git describe --abbrev=0 --tags "$until^" 2>/dev/null) || \ + unset since + elif [[ "$since" = --all ]]; then + unset since + fi + + # Commit classification arrays + local -A commits subjects scopes breaking reverts + local truncate=0 read_commits=0 + local hash version tag + + # Get the first version name: + # 1) try tag-like version, or + # 2) try name-rev, or + # 3) try branch name, or + # 4) try short hash + version=$(command git describe --tags $until 2>/dev/null) \ + || version=$(command git name-rev --no-undefined --name-only --exclude="remotes/*" $until 2>/dev/null) \ + || version=$(command git symbolic-ref --quiet --short $until 2>/dev/null) \ + || version=$(command git rev-parse --short $until 2>/dev/null) + + # Get commit list from $until commit until $since commit, or until root + # commit if $since is unset, in short hash form. + # --first-parent is used when dealing with merges: it only prints the + # merge commit, not the commits of the merged branch. + command git rev-list --first-parent --abbrev-commit --abbrev=7 ${since:+$since..}$until | while read hash; do + # Truncate list on versions with a lot of commits + if [[ -z "$since" ]] && (( ++read_commits > 35 )); then + truncate=1 + break + fi + + # If we find a new release (exact tag) + if tag=$(command git describe --exact-match --tags $hash 2>/dev/null); then + # Output previous release + display-release + # Reinitialize commit storage + commits=() + subjects=() + scopes=() + breaking=() + reverts=() + # Start work on next release + version="$tag" + read_commits=1 + fi + + parse-commit "$hash" + done + + display-release + + if (( truncate )); then + echo " ...more commits omitted" + echo + fi +} + +# Use raw output if stdout is not a tty +if [[ ! -t 1 && -z "$3" ]]; then + main "$1" "$2" --raw +else + main "$@" +fi |