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https://github.com/git/git
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fc134b41ce
We're manually parsing the HEAD reference in git-prompt to figure out whether it is a symbolic or direct reference. This makes it intimately tied to the on-disk format we use to store references and will stop working once we gain additional reference backends in the Git project. Ideally, we would refactor the code to exclusively use plumbing tools to read refs such that we do not have to care about the on-disk format at all. Unfortunately though, spawning processes can be quite expensive on some systems like Windows. As the Git prompt logic may be executed quite frequently we try very hard to spawn as few processes as possible. This refactoring is thus out of question for now. Instead, condition the logic on the repository's ref format: if the repo uses the the "files" backend we can continue to use the old logic and read the respective files from disk directly. If it's anything else, then we use git-symbolic-ref(1) to read the value of HEAD. This change makes the Git prompt compatible with the upcoming "reftable" format. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
612 lines
18 KiB
Bash
612 lines
18 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 repository status 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$(__git_ps1 " (%s)")]\$ '
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# ZSH: setopt PROMPT_SUBST ; PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
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# the optional argument will be used as format string.
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# 3b) Alternatively, for a slightly faster prompt, __git_ps1 can
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# be used for PROMPT_COMMAND in Bash or for precmd() in Zsh
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# with two parameters, <pre> and <post>, which are strings
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# you would put in $PS1 before and after the status string
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# generated by the git-prompt machinery. e.g.
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# Bash: PROMPT_COMMAND='__git_ps1 "\u@\h:\w" "\\\$ "'
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# will show username, at-sign, host, colon, cwd, then
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# various status string, followed by dollar and SP, as
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# your prompt.
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# ZSH: precmd () { __git_ps1 "%n" ":%~$ " "|%s" }
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# will show username, pipe, then various status string,
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# followed by colon, cwd, dollar and SP, as 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 repository status will be displayed only if you are currently in a
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# git repository. The %s token is the placeholder for the shown status.
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#
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# The prompt status always includes the current branch name.
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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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# name if verbose, then also show the upstream abbrev name
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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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# You can change the separator between the branch name and the above
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# state symbols by setting GIT_PS1_STATESEPARATOR. The default separator
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# is SP.
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#
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# When there is an in-progress operation such as a merge, rebase,
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# revert, cherry-pick, or bisect, the prompt will include information
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# related to the operation, often in the form "|<OPERATION-NAME>".
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#
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# When the repository has a sparse-checkout, a notification of the form
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# "|SPARSE" will be included in the prompt. This can be shortened to a
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# single '?' character by setting GIT_PS1_COMPRESSSPARSESTATE, or omitted
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# by setting GIT_PS1_OMITSPARSESTATE.
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#
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# If you would like to see a notification on the prompt when there are
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# unresolved conflicts, set GIT_PS1_SHOWCONFLICTSTATE to "yes". The
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# prompt will include "|CONFLICT".
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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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# tag relative to any older 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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#
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# If you would like __git_ps1 to do nothing in the case when the current
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# directory is set up to be ignored by git, then set
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# GIT_PS1_HIDE_IF_PWD_IGNORED to a nonempty value. Override this on the
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# repository level by setting bash.hideIfPwdIgnored to "false".
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# check whether printf supports -v
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__git_printf_supports_v=
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printf -v __git_printf_supports_v -- '%s' yes >/dev/null 2>&1
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# stores the divergence from upstream in $p
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# used by GIT_PS1_SHOWUPSTREAM
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__git_ps1_show_upstream ()
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{
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local key value
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local svn_remote svn_url_pattern count n
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local upstream_type=git legacy="" verbose="" name=""
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svn_remote=()
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# get some config options from git-config
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local output="$(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))]="$value"
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svn_url_pattern="$svn_url_pattern\\|$value"
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upstream_type=svn+git # default upstream type is SVN if available, else git
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;;
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esac
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done <<< "$output"
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# parse configuration values
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local option
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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_type="$option" ;;
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verbose) verbose=1 ;;
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legacy) legacy=1 ;;
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name) name=1 ;;
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esac
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done
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# Find our upstream type
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case "$upstream_type" in
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git) upstream_type="@{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 -a svn_upstream
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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 "$svn_upstream" ]]; then
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# default branch name for checkouts with no layout:
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upstream_type=${GIT_SVN_ID:-git-svn}
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else
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upstream_type=${svn_upstream#/}
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fi
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elif [[ "svn+git" = "$upstream_type" ]]; then
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upstream_type="@{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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"$upstream_type"...HEAD 2>/dev/null)"
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else
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# produce equivalent output to --count for older versions of git
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local commits
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if commits="$(git rev-list --left-right "$upstream_type"...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 "$count" in
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"") # no upstream
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p="" ;;
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"0 0") # equal to upstream
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p="=" ;;
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"0 "*) # ahead of upstream
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p=">" ;;
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*" 0") # behind upstream
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p="<" ;;
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*) # diverged from upstream
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p="<>" ;;
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esac
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else # verbose, set upstream instead of p
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case "$count" in
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"") # no upstream
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upstream="" ;;
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"0 0") # equal to upstream
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upstream="|u=" ;;
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"0 "*) # ahead of upstream
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upstream="|u+${count#0 }" ;;
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*" 0") # behind upstream
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upstream="|u-${count% 0}" ;;
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*) # diverged from upstream
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upstream="|u+${count#* }-${count% *}" ;;
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esac
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if [[ -n "$count" && -n "$name" ]]; then
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__git_ps1_upstream_name=$(git rev-parse \
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--abbrev-ref "$upstream_type" 2>/dev/null)
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if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
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upstream="$upstream \${__git_ps1_upstream_name}"
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else
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upstream="$upstream ${__git_ps1_upstream_name}"
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# not needed anymore; keep user's
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# environment clean
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unset __git_ps1_upstream_name
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fi
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fi
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fi
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}
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# Helper function that is meant to be called from __git_ps1. It
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# injects color codes into the appropriate gitstring variables used
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# to build a gitstring. Colored variables are responsible for clearing
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# their own color.
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__git_ps1_colorize_gitstring ()
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{
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if [[ -n ${ZSH_VERSION-} ]]; then
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local c_red='%F{red}'
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local c_green='%F{green}'
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local c_lblue='%F{blue}'
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local c_clear='%f'
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else
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# Using \001 and \002 around colors is necessary to prevent
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# issues with command line editing/browsing/completion!
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local c_red=$'\001\e[31m\002'
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local c_green=$'\001\e[32m\002'
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local c_lblue=$'\001\e[1;34m\002'
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local c_clear=$'\001\e[0m\002'
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fi
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local bad_color=$c_red
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local ok_color=$c_green
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local flags_color="$c_lblue"
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local branch_color=""
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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="$bad_color"
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fi
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if [ -n "$c" ]; then
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c="$branch_color$c$c_clear"
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fi
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b="$branch_color$b$c_clear"
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if [ -n "$w" ]; then
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w="$bad_color$w$c_clear"
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fi
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if [ -n "$i" ]; then
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i="$ok_color$i$c_clear"
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fi
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if [ -n "$s" ]; then
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s="$flags_color$s$c_clear"
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fi
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if [ -n "$u" ]; then
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u="$bad_color$u$c_clear"
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fi
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}
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# Helper function to read the first line of a file into a variable.
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# __git_eread requires 2 arguments, the file path and the name of the
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# variable, in that order.
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__git_eread ()
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{
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test -r "$1" && IFS=$'\r\n' read -r "$2" <"$1"
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}
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# see if a cherry-pick or revert is in progress, if the user has committed a
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# conflict resolution with 'git commit' in the middle of a sequence of picks or
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# reverts then CHERRY_PICK_HEAD/REVERT_HEAD will not exist so we have to read
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# the todo file.
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__git_sequencer_status ()
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{
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local todo
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if test -f "$g/CHERRY_PICK_HEAD"
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then
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r="|CHERRY-PICKING"
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return 0;
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elif test -f "$g/REVERT_HEAD"
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then
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r="|REVERTING"
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return 0;
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elif __git_eread "$g/sequencer/todo" todo
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then
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case "$todo" in
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p[\ \ ]|pick[\ \ ]*)
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r="|CHERRY-PICKING"
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return 0
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;;
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revert[\ \ ]*)
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r="|REVERTING"
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return 0
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;;
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esac
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fi
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return 1
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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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# preserve exit status
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local exit=$?
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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:-$printf_format}"
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# set PS1 to a plain prompt so that we can
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# simply return early if the prompt should not
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# be decorated
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PS1="$ps1pc_start$ps1pc_end"
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;;
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0|1) printf_format="${1:-$printf_format}"
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;;
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*) return $exit
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;;
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esac
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# ps1_expanded: This variable is set to 'yes' if the shell
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# subjects the value of PS1 to parameter expansion:
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#
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# * bash does unless the promptvars option is disabled
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# * zsh does not unless the PROMPT_SUBST option is set
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# * POSIX shells always do
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#
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# If the shell would expand the contents of PS1 when drawing
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# the prompt, a raw ref name must not be included in PS1.
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# This protects the user from arbitrary code execution via
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# specially crafted ref names. For example, a ref named
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# 'refs/heads/$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)' might cause the
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# shell to execute 'sudo rm -rf /' when the prompt is drawn.
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#
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# Instead, the ref name should be placed in a separate global
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# variable (in the __git_ps1_* namespace to avoid colliding
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# with the user's environment) and that variable should be
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# referenced from PS1. For example:
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#
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# __git_ps1_foo=$(do_something_to_get_ref_name)
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# PS1="...stuff...\${__git_ps1_foo}...stuff..."
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#
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# If the shell does not expand the contents of PS1, the raw
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# ref name must be included in PS1.
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#
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# The value of this variable is only relevant when in pcmode.
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#
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# Assume that the shell follows the POSIX specification and
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# expands PS1 unless determined otherwise. (This is more
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# likely to be correct if the user has a non-bash, non-zsh
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# shell and safer than the alternative if the assumption is
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# incorrect.)
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#
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local ps1_expanded=yes
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[ -z "${ZSH_VERSION-}" ] || [[ -o PROMPT_SUBST ]] || ps1_expanded=no
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[ -z "${BASH_VERSION-}" ] || shopt -q promptvars || ps1_expanded=no
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local repo_info rev_parse_exit_code
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repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
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--is-bare-repository --is-inside-work-tree --show-ref-format \
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--short HEAD 2>/dev/null)"
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rev_parse_exit_code="$?"
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if [ -z "$repo_info" ]; then
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return $exit
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fi
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local short_sha=""
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if [ "$rev_parse_exit_code" = "0" ]; then
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short_sha="${repo_info##*$'\n'}"
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repo_info="${repo_info%$'\n'*}"
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fi
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local ref_format="${repo_info##*$'\n'}"
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repo_info="${repo_info%$'\n'*}"
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local inside_worktree="${repo_info##*$'\n'}"
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repo_info="${repo_info%$'\n'*}"
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local bare_repo="${repo_info##*$'\n'}"
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repo_info="${repo_info%$'\n'*}"
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local inside_gitdir="${repo_info##*$'\n'}"
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local g="${repo_info%$'\n'*}"
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if [ "true" = "$inside_worktree" ] &&
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[ -n "${GIT_PS1_HIDE_IF_PWD_IGNORED-}" ] &&
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[ "$(git config --bool bash.hideIfPwdIgnored)" != "false" ] &&
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git check-ignore -q .
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then
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return $exit
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fi
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local sparse=""
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if [ -z "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
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[ -z "${GIT_PS1_OMITSPARSESTATE-}" ] &&
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[ "$(git config --bool core.sparseCheckout)" = "true" ]; then
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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="$(git symbolic-ref HEAD 2>/dev/null)"
|
|
else
|
|
local head=""
|
|
|
|
case "$ref_format" in
|
|
files)
|
|
if ! __git_eread "$g/HEAD" head; then
|
|
return $exit
|
|
fi
|
|
|
|
if [[ $head == "ref: "* ]]; then
|
|
head="${head#ref: }"
|
|
else
|
|
head=""
|
|
fi
|
|
;;
|
|
*)
|
|
head="$(git symbolic-ref HEAD 2>/dev/null)"
|
|
;;
|
|
esac
|
|
|
|
if test -z "$head"; 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)"
|
|
else
|
|
b="$head"
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
if [ -n "$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
|
|
}
|