400 lines
12 KiB
Bash
400 lines
12 KiB
Bash
# bash/zsh git prompt support
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#
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# Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
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# Distributed under the GNU General Public License, version 2.0.
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#
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# This script allows you to see the current branch in your prompt.
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#
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# To enable:
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#
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# 1) Copy this file to somewhere (e.g. ~/.git-prompt.sh).
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# 2) Add the following line to your .bashrc/.zshrc:
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# source ~/.git-prompt.sh
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# 3a) Change your PS1 to call __git_ps1 as
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# command-substitution:
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# Bash: PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '
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# ZSH: PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
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# the optional argument will be used as format string.
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# 3b) Alternatively, if you are using bash, __git_ps1 can be
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# used for PROMPT_COMMAND with two parameters, <pre> and
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# <post>, which are strings you would put in $PS1 before
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# and after the status string generated by the git-prompt
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# machinery. e.g.
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# PROMPT_COMMAND='__git_ps1 "\u@\h:\w" "\\\$ "'
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# will show username, at-sign, host, colon, cwd, then
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# various status string, followed by dollar and SP, as
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# your prompt.
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# Optionally, you can supply a third argument with a printf
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# format string to finetune the output of the branch status
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#
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# The argument to __git_ps1 will be displayed only if you are currently
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# in a git repository. The %s token will be the name of the current
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# branch.
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#
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# In addition, if you set GIT_PS1_SHOWDIRTYSTATE to a nonempty value,
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# unstaged (*) and staged (+) changes will be shown next to the branch
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# name. You can configure this per-repository with the
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# bash.showDirtyState variable, which defaults to true once
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# GIT_PS1_SHOWDIRTYSTATE is enabled.
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#
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# You can also see if currently something is stashed, by setting
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# GIT_PS1_SHOWSTASHSTATE to a nonempty value. If something is stashed,
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# then a '$' will be shown next to the branch name.
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#
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# If you would like to see if there're untracked files, then you can set
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# GIT_PS1_SHOWUNTRACKEDFILES to a nonempty value. If there're untracked
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# files, then a '%' will be shown next to the branch name. You can
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# configure this per-repository with the bash.showUntrackedFiles
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# variable, which defaults to true once GIT_PS1_SHOWUNTRACKEDFILES is
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# enabled.
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#
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# If you would like to see the difference between HEAD and its upstream,
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# set GIT_PS1_SHOWUPSTREAM="auto". A "<" indicates you are behind, ">"
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# indicates you are ahead, "<>" indicates you have diverged and "="
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# indicates that there is no difference. You can further control
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# behaviour by setting GIT_PS1_SHOWUPSTREAM to a space-separated list
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# of values:
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#
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# verbose show number of commits ahead/behind (+/-) upstream
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# legacy don't use the '--count' option available in recent
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# versions of git-rev-list
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# git always compare HEAD to @{upstream}
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# svn always compare HEAD to your SVN upstream
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#
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# By default, __git_ps1 will compare HEAD to your SVN upstream if it can
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# find one, or @{upstream} otherwise. Once you have set
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# GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
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# setting the bash.showUpstream config variable.
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#
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# If you would like to see more information about the identity of
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# commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE
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# to one of these values:
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#
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# contains relative to newer annotated tag (v1.6.3.2~35)
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# branch relative to newer tag or branch (master~4)
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# describe relative to older annotated tag (v1.6.3.1-13-gdd42c2f)
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# default exactly matching tag
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#
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# If you would like a colored hint about the current dirty state, set
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# GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on
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# the colored output of "git status -sb".
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# __gitdir accepts 0 or 1 arguments (i.e., location)
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# returns location of .git repo
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__gitdir ()
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{
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# Note: this function is duplicated in git-completion.bash
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# When updating it, make sure you update the other one to match.
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if [ -z "${1-}" ]; then
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if [ -n "${__git_dir-}" ]; then
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echo "$__git_dir"
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elif [ -n "${GIT_DIR-}" ]; then
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test -d "${GIT_DIR-}" || return 1
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echo "$GIT_DIR"
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elif [ -d .git ]; then
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echo .git
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else
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git rev-parse --git-dir 2>/dev/null
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fi
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elif [ -d "$1/.git" ]; then
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echo "$1/.git"
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else
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echo "$1"
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fi
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}
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# stores the divergence from upstream in $p
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# used by GIT_PS1_SHOWUPSTREAM
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__git_ps1_show_upstream ()
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{
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local key value
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local svn_remote svn_url_pattern count n
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local upstream=git legacy="" verbose=""
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svn_remote=()
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# get some config options from git-config
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local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
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while read -r key value; do
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case "$key" in
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bash.showupstream)
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GIT_PS1_SHOWUPSTREAM="$value"
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if [[ -z "${GIT_PS1_SHOWUPSTREAM}" ]]; then
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p=""
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return
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fi
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;;
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svn-remote.*.url)
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svn_remote[ $((${#svn_remote[@]} + 1)) ]="$value"
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svn_url_pattern+="\\|$value"
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upstream=svn+git # default upstream is SVN if available, else git
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;;
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esac
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done <<< "$output"
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# parse configuration values
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for option in ${GIT_PS1_SHOWUPSTREAM}; do
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case "$option" in
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git|svn) upstream="$option" ;;
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verbose) verbose=1 ;;
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legacy) legacy=1 ;;
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esac
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done
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# Find our upstream
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case "$upstream" in
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git) upstream="@{upstream}" ;;
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svn*)
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# get the upstream from the "git-svn-id: ..." in a commit message
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# (git-svn uses essentially the same procedure internally)
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local svn_upstream=($(git log --first-parent -1 \
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--grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null))
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if [[ 0 -ne ${#svn_upstream[@]} ]]; then
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svn_upstream=${svn_upstream[ ${#svn_upstream[@]} - 2 ]}
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svn_upstream=${svn_upstream%@*}
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local n_stop="${#svn_remote[@]}"
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for ((n=1; n <= n_stop; n++)); do
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svn_upstream=${svn_upstream#${svn_remote[$n]}}
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done
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if [[ -z "$svn_upstream" ]]; then
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# default branch name for checkouts with no layout:
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upstream=${GIT_SVN_ID:-git-svn}
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else
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upstream=${svn_upstream#/}
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fi
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elif [[ "svn+git" = "$upstream" ]]; then
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upstream="@{upstream}"
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fi
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;;
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esac
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# Find how many commits we are ahead/behind our upstream
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if [[ -z "$legacy" ]]; then
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count="$(git rev-list --count --left-right \
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"$upstream"...HEAD 2>/dev/null)"
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else
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# produce equivalent output to --count for older versions of git
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local commits
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if commits="$(git rev-list --left-right "$upstream"...HEAD 2>/dev/null)"
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then
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local commit behind=0 ahead=0
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for commit in $commits
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do
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case "$commit" in
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"<"*) ((behind++)) ;;
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*) ((ahead++)) ;;
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esac
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done
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count="$behind $ahead"
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else
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count=""
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fi
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fi
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# calculate the result
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if [[ -z "$verbose" ]]; then
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case "$count" in
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"") # no upstream
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p="" ;;
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"0 0") # equal to upstream
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p="=" ;;
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"0 "*) # ahead of upstream
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p=">" ;;
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*" 0") # behind upstream
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p="<" ;;
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*) # diverged from upstream
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p="<>" ;;
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esac
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else
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case "$count" in
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"") # no upstream
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p="" ;;
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"0 0") # equal to upstream
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p=" u=" ;;
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"0 "*) # ahead of upstream
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p=" u+${count#0 }" ;;
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*" 0") # behind upstream
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p=" u-${count% 0}" ;;
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*) # diverged from upstream
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p=" u+${count#* }-${count% *}" ;;
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esac
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fi
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}
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# __git_ps1 accepts 0 or 1 arguments (i.e., format string)
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# when called from PS1 using command substitution
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# in this mode it prints text to add to bash PS1 prompt (includes branch name)
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#
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# __git_ps1 requires 2 or 3 arguments when called from PROMPT_COMMAND (pc)
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# in that case it _sets_ PS1. The arguments are parts of a PS1 string.
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# when two arguments are given, the first is prepended and the second appended
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# to the state string when assigned to PS1.
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# The optional third parameter will be used as printf format string to further
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# customize the output of the git-status string.
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# In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
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__git_ps1 ()
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{
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local pcmode=no
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local detached=no
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local ps1pc_start='\u@\h:\w '
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local ps1pc_end='\$ '
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local printf_format=' (%s)'
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case "$#" in
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2|3) pcmode=yes
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ps1pc_start="$1"
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ps1pc_end="$2"
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printf_format="${3:-$printf_format}"
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;;
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0|1) printf_format="${1:-$printf_format}"
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;;
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*) return
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;;
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esac
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local g="$(__gitdir)"
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if [ -z "$g" ]; then
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if [ $pcmode = yes ]; then
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#In PC mode PS1 always needs to be set
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PS1="$ps1pc_start$ps1pc_end"
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fi
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else
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local r=""
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local b=""
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if [ -f "$g/rebase-merge/interactive" ]; then
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r="|REBASE-i"
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b="$(cat "$g/rebase-merge/head-name")"
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elif [ -d "$g/rebase-merge" ]; then
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r="|REBASE-m"
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b="$(cat "$g/rebase-merge/head-name")"
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else
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if [ -d "$g/rebase-apply" ]; then
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if [ -f "$g/rebase-apply/rebasing" ]; then
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r="|REBASE"
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elif [ -f "$g/rebase-apply/applying" ]; then
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r="|AM"
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else
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r="|AM/REBASE"
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fi
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elif [ -f "$g/MERGE_HEAD" ]; then
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r="|MERGING"
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elif [ -f "$g/CHERRY_PICK_HEAD" ]; then
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r="|CHERRY-PICKING"
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elif [ -f "$g/BISECT_LOG" ]; then
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r="|BISECTING"
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fi
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b="$(git symbolic-ref HEAD 2>/dev/null)" || {
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detached=yes
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b="$(
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case "${GIT_PS1_DESCRIBE_STYLE-}" in
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(contains)
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git describe --contains HEAD ;;
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(branch)
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git describe --contains --all HEAD ;;
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(describe)
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git describe HEAD ;;
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(* | default)
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git describe --tags --exact-match HEAD ;;
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esac 2>/dev/null)" ||
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b="$(cut -c1-7 "$g/HEAD" 2>/dev/null)..." ||
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b="unknown"
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b="($b)"
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}
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fi
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local w=""
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local i=""
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local s=""
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local u=""
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local c=""
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local p=""
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if [ "true" = "$(git rev-parse --is-inside-git-dir 2>/dev/null)" ]; then
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if [ "true" = "$(git rev-parse --is-bare-repository 2>/dev/null)" ]; then
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c="BARE:"
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else
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b="GIT_DIR!"
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fi
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elif [ "true" = "$(git rev-parse --is-inside-work-tree 2>/dev/null)" ]; then
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if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
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[ "$(git config --bool bash.showDirtyState)" != "false" ]
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then
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git diff --no-ext-diff --quiet --exit-code || w="*"
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if git rev-parse --quiet --verify HEAD >/dev/null; then
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git diff-index --cached --quiet HEAD -- || i="+"
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else
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i="#"
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fi
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fi
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if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ]; then
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git rev-parse --verify refs/stash >/dev/null 2>&1 && s="$"
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fi
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if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ] &&
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[ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
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[ -n "$(git ls-files --others --exclude-standard)" ]
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then
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u="%%"
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fi
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if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then
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__git_ps1_show_upstream
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fi
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fi
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local f="$w$i$s$u"
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if [ $pcmode = yes ]; then
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local gitstring=
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if [ -n "${GIT_PS1_SHOWCOLORHINTS-}" ]; then
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local c_red='\e[31m'
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local c_green='\e[32m'
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local c_lblue='\e[1;34m'
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local c_clear='\e[0m'
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local bad_color=$c_red
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local ok_color=$c_green
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local branch_color="$c_clear"
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local flags_color="$c_lblue"
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local branchstring="$c${b##refs/heads/}"
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if [ $detached = no ]; then
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branch_color="$ok_color"
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else
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branch_color="$bad_color"
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fi
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# Setting gitstring directly with \[ and \] around colors
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# is necessary to prevent wrapping issues!
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gitstring="\[$branch_color\]$branchstring\[$c_clear\]"
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if [ -n "$w$i$s$u$r$p" ]; then
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gitstring="$gitstring "
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fi
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if [ "$w" = "*" ]; then
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gitstring="$gitstring\[$bad_color\]$w"
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fi
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if [ -n "$i" ]; then
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gitstring="$gitstring\[$ok_color\]$i"
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fi
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if [ -n "$s" ]; then
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gitstring="$gitstring\[$flags_color\]$s"
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fi
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if [ -n "$u" ]; then
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gitstring="$gitstring\[$bad_color\]$u"
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fi
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gitstring="$gitstring\[$c_clear\]$r$p"
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else
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gitstring="$c${b##refs/heads/}${f:+ $f}$r$p"
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fi
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gitstring=$(printf -- "$printf_format" "$gitstring")
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PS1="$ps1pc_start$gitstring$ps1pc_end"
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else
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# NO color option unless in PROMPT_COMMAND mode
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printf -- "$printf_format" "$c${b##refs/heads/}${f:+ $f}$r$p"
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fi
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fi
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}
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