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