git-prompt.sh « completion « contrib - git.git (original) (raw)
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# bash/zsh git prompt support
#
# Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
# Distributed under the GNU General Public License, version 2.0.
#
# This script allows you to see repository status in your prompt.
#
# To enable:
#
# 1) Copy this file to somewhere (e.g. ~/.git-prompt.sh).
# 2) Add the following line to your .bashrc/.zshrc/.profile:
# . ~/.git-prompt.sh # dot path/to/this-file
# 3a) Change your PS1 to call __git_ps1 as
# command-substitution:
# Bash: PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '
# ZSH: setopt PROMPT_SUBST ; PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
# the optional argument will be used as format string.
# 3b) Alternatively, for a slightly faster prompt, __git_ps1 can
# be used for PROMPT_COMMAND in Bash or for precmd() in Zsh
# with two parameters, <pre> and <post>, which are strings
# you would put in $PS1 before and after the status string
# generated by the git-prompt machinery. e.g.
# Bash: PROMPT_COMMAND='__git_ps1 "\u@\h:\w" "\\\$ "'
# will show username, at-sign, host, colon, cwd, then
# various status string, followed by dollar and SP, as
# your prompt.
# ZSH: precmd () { __git_ps1 "%n" ":%~$ " "|%s" }
# will show username, pipe, then various status string,
# followed by colon, cwd, dollar and SP, as your prompt.
# Optionally, you can supply a third argument with a printf
# format string to finetune the output of the branch status
#
# See notes below about compatibility with other shells.
#
# The repository status will be displayed only if you are currently in a
# git repository. The %s token is the placeholder for the shown status.
#
# The prompt status always includes the current branch name.
#
# In addition, if you set GIT_PS1_SHOWDIRTYSTATE to a nonempty value,
# unstaged (*) and staged (+) changes will be shown next to the branch
# name. You can configure this per-repository with the
# bash.showDirtyState variable, which defaults to true once
# GIT_PS1_SHOWDIRTYSTATE is enabled.
#
# You can also see if currently something is stashed, by setting
# GIT_PS1_SHOWSTASHSTATE to a nonempty value. If something is stashed,
# then a '$' will be shown next to the branch name.
#
# If you would like to see if there're untracked files, then you can set
# GIT_PS1_SHOWUNTRACKEDFILES to a nonempty value. If there're untracked
# files, then a '%' will be shown next to the branch name. You can
# configure this per-repository with the bash.showUntrackedFiles
# variable, which defaults to true once GIT_PS1_SHOWUNTRACKEDFILES is
# enabled.
#
# If you would like to see the difference between HEAD and its upstream,
# set GIT_PS1_SHOWUPSTREAM="auto". A "<" indicates you are behind, ">"
# indicates you are ahead, "<>" indicates you have diverged and "="
# indicates that there is no difference. You can further control
# behaviour by setting GIT_PS1_SHOWUPSTREAM to a space-separated list
# of values:
#
# verbose show number of commits ahead/behind (+/-) upstream
# name if verbose, then also show the upstream abbrev name
# legacy don't use the '--count' option available in recent
# versions of git-rev-list
# git always compare HEAD to @{upstream}
# svn always compare HEAD to your SVN upstream
#
# By default, __git_ps1 will compare HEAD to your SVN upstream if it can
# find one, or @{upstream} otherwise. Once you have set
# GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
# setting the bash.showUpstream config variable.
#
# You can change the separator between the branch name and the above
# state symbols by setting GIT_PS1_STATESEPARATOR. The default separator
# is SP.
#
# When there is an in-progress operation such as a merge, rebase,
# revert, cherry-pick, or bisect, the prompt will include information
# related to the operation, often in the form "|<OPERATION-NAME>".
#
# When the repository has a sparse-checkout, a notification of the form
# "|SPARSE" will be included in the prompt. This can be shortened to a
# single '?' character by setting GIT_PS1_COMPRESSSPARSESTATE, or omitted
# by setting GIT_PS1_OMITSPARSESTATE.
#
# If you would like to see a notification on the prompt when there are
# unresolved conflicts, set GIT_PS1_SHOWCONFLICTSTATE to "yes". The
# prompt will include "|CONFLICT".
#
# If you would like to see more information about the identity of
# commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE
# to one of these values:
#
# contains relative to newer annotated tag (v1.6.3.2~35)
# branch relative to newer tag or branch (master~4)
# describe relative to older annotated tag (v1.6.3.1-13-gdd42c2f)
# tag relative to any older tag (v1.6.3.1-13-gdd42c2f)
# default exactly matching tag
#
# If you would like a colored hint about the current dirty state, set
# GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on
# the colored output of "git status -sb".
#
# If you would like __git_ps1 to do nothing in the case when the current
# directory is set up to be ignored by git, then set
# GIT_PS1_HIDE_IF_PWD_IGNORED to a nonempty value. Override this on the
# repository level by setting bash.hideIfPwdIgnored to "false".
#
# Compatibility with other shells (beyond bash/zsh):
#
# We require posix-ish shell plus "local" support, which is most
# shells (even pdksh), but excluding ksh93 (because no "local").
#
# Prompt integration might differ between shells, but the gist is
# to load it once on shell init with '. path/to/git-prompt.sh',
# set GIT_PS1* vars once as needed, and either place $(__git_ps1..)
# inside PS1 once (0/1 args), or, before each prompt is displayed,
# call __git_ps1 (2/3 args) which sets PS1 with the status embedded.
#
# Many shells support the 1st method of command substitution,
# though some might need to first enable cmd substitution in PS1.
#
# When using colors, each escape sequence is wrapped between byte
# values 1 and 2 (control chars SOH, STX, respectively), which are
# invisible at the output, but for bash/readline they mark 0-width
# strings (SGR color sequences) when calculating the on-screen
# prompt width, to maintain correct input editing at the prompt.
#
# To replace or disable the 0-width markers, set GIT_PS1_COLOR_PRE
# and GIT_PS1_COLOR_POST to other markers, or empty (nul) to not
# use markers. For instance, some shells support '\[' and '\]' as
# start/end markers in PS1 - when invoking __git_ps1 with 3/4 args,
# but it may or may not work in command substitution mode. YMMV.
#
# If the shell doesn't support 0-width markers and editing behaves
# incorrectly when using colors in __git_ps1, then, other than
# disabling color, it might be solved using multi-line prompt,
# where the git status is not at the last line, e.g.:
# PS1='\n\w \u@\h$(__git_ps1 " (%s)")\n\$ '
# check whether printf supports -v
__git_printf_supports_v=
printf -v __git_printf_supports_v -- '%s' yes >/dev/null 2>&1
# like __git_SOH=$'\001' etc but works also in shells without $'...'
eval "$(printf '
__git_SOH="\001" __git_STX="\002" __git_ESC="\033"
__git_LF="\n" __git_CRLF="\r\n"
')"
# stores the divergence from upstream in $p
# used by GIT_PS1_SHOWUPSTREAM
__git_ps1_show_upstream ()
{
local key value
local svn_remotes="" svn_url_pattern="" count n
local upstream_type=git legacy="" verbose="" name=""
local LF="$__git_LF"
# get some config options from git-config
local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
while read -r key value; do
case "$key" in
bash.showupstream)
GIT_PS1_SHOWUPSTREAM="$value"
if [ -z "${GIT_PS1_SHOWUPSTREAM}" ]; then
p=""
return
fi
;;
svn-remote.*.url)
svn_remotes=${svn_remotes}${value}${LF} # URI\nURI\n...
svn_url_pattern="$svn_url_pattern\\|$value"
upstream_type=svn+git # default upstream type is SVN if available, else git
;;
esac
done <<-OUTPUT
$output
OUTPUT
# parse configuration values
local option
for option in ${GIT_PS1_SHOWUPSTREAM-}; do
case "$option" in
git|svn) upstream_type="$option" ;;
verbose) verbose=1 ;;
legacy) legacy=1 ;;
name) name=1 ;;
esac
done
# Find our upstream type
case "$upstream_type" in
git) upstream_type="@{upstream}" ;;
svn*)
# successful svn-upstream resolution:
# - get the list of configured svn-remotes ($svn_remotes set above)
# - get the last commit which seems from one of our svn-remotes
# - confirm that it is from one of the svn-remotes
# - use $GIT_SVN_ID if set, else "git-svn"
# get upstream from "git-svn-id: UPSTRM@N HASH" in a commit message
# (git-svn uses essentially the same procedure internally)
local svn_upstream="$(
git log --first-parent -1 \
--grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null
)"
if [ -n "$svn_upstream" ]; then
# extract the URI, assuming --grep matched the last line
svn_upstream=${svn_upstream##*$LF} # last line
svn_upstream=${svn_upstream#*: } # UPSTRM@N HASH
svn_upstream=${svn_upstream%@*} # UPSTRM
case <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>L</mi><mi>F</mi></mrow><annotation encoding="application/x-tex">{LF}</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6833em;"></span><span class="mord"><span class="mord mathnormal">L</span><span class="mord mathnormal" style="margin-right:0.13889em;">F</span></span></span></span></span>{svn_remotes} in
*"${LF}${svn_upstream}${LF}"*)
# grep indeed matched the last line - it's our remote
# default branch name for checkouts with no layout:
upstream_type=${GIT_SVN_ID:-git-svn}
;;
*)
# the commit message includes one of our remotes, but
# it's not at the last line. is $svn_upstream junk?
upstream_type=${svn_upstream#/}
;;
esac
elif [ "svn+git" = "$upstream_type" ]; then
upstream_type="@{upstream}"
fi
;;
esac
# Find how many commits we are ahead/behind our upstream
if [ -z "$legacy" ]; then
count="$(git rev-list --count --left-right \
"$upstream_type"...HEAD 2>/dev/null)"
else
# produce equivalent output to --count for older versions of git
local commits
if commits="$(git rev-list --left-right "$upstream_type"...HEAD 2>/dev/null)"
then
local commit behind=0 ahead=0
for commit in $commits
do
case "$commit" in
"<"*) behind=$((behind+1)) ;;
*) ahead=$((ahead+1)) ;;
esac
done
count="$behind $ahead"
else
count=""
fi
fi
# calculate the result
if [ -z "$verbose" ]; then
case "$count" in
"") # no upstream
p="" ;;
"0 0") # equal to upstream
p="=" ;;
"0 "*) # ahead of upstream
p=">" ;;
*" 0") # behind upstream
p="<" ;;
*) # diverged from upstream
p="<>" ;;
esac
else # verbose, set upstream instead of p
case "$count" in
"") # no upstream
upstream="" ;;
"0 0") # equal to upstream
upstream="|u=" ;;
"0 "*) # ahead of upstream
upstream="|u+${count#0 }" ;;
*" 0") # behind upstream
upstream="|u-${count% 0}" ;;
*) # diverged from upstream
upstream="|u+${count#* }-${count% *}" ;;
esac
if [ -n "$count" ] && [ -n "$name" ]; then
__git_ps1_upstream_name=$(git rev-parse \
--abbrev-ref "$upstream_type" 2>/dev/null)
if [ "$pcmode" = yes ] && [ "$ps1_expanded" = yes ]; then
upstream="$upstream \${__git_ps1_upstream_name}"
else
upstream="$upstream ${__git_ps1_upstream_name}"
# not needed anymore; keep user's
# environment clean
unset __git_ps1_upstream_name
fi
fi
fi
}
# Helper function that is meant to be called from __git_ps1. It
# injects color codes into the appropriate gitstring variables used
# to build a gitstring. Colored variables are responsible for clearing
# their own color.
__git_ps1_colorize_gitstring ()
{
if [ -n "${ZSH_VERSION-}" ]; then
local c_red='%F{red}'
local c_green='%F{green}'
local c_lblue='%F{blue}'
local c_clear='%f'
else
# \001 (SOH) and \002 (STX) are 0-width substring markers
# which bash/readline identify while calculating the prompt
# on-screen width - to exclude 0-screen-width esc sequences.
local c_pre="${GIT_PS1_COLOR_PRE-$__git_SOH}${__git_ESC}["
local c_post="m${GIT_PS1_COLOR_POST-$__git_STX}"
local c_red="${c_pre}31${c_post}"
local c_green="${c_pre}32${c_post}"
local c_lblue="${c_pre}1;34${c_post}"
local c_clear="${c_pre}0${c_post}"
fi
local bad_color="$c_red"
local ok_color="$c_green"
local flags_color="$c_lblue"
local branch_color=""
if [ "$detached" = no ]; then
branch_color="$ok_color"
else
branch_color="$bad_color"
fi
if [ -n "$c" ]; then
c="$branch_color$c$c_clear"
fi
b="$branch_color$b$c_clear"
if [ -n "$w" ]; then
w="$bad_color$w$c_clear"
fi
if [ -n "$i" ]; then
i="$ok_color$i$c_clear"
fi
if [ -n "$s" ]; then
s="$flags_color$s$c_clear"
fi
if [ -n "$u" ]; then
u="$bad_color$u$c_clear"
fi
}
# Helper function to read the first line of a file into a variable.
# __git_eread requires 2 arguments, the file path and the name of the
# variable, in that order.
__git_eread ()
{
test -r "$1" && IFS=$__git_CRLF read -r "$2" <"$1"
}
# see if a cherry-pick or revert is in progress, if the user has committed a
# conflict resolution with 'git commit' in the middle of a sequence of picks or
# reverts then CHERRY_PICK_HEAD/REVERT_HEAD will not exist so we have to read
# the todo file.
__git_sequencer_status ()
{
local todo
if test -f "$g/CHERRY_PICK_HEAD"
then
r="|CHERRY-PICKING"
return 0;
elif test -f "$g/REVERT_HEAD"
then
r="|REVERTING"
return 0;
elif __git_eread "$g/sequencer/todo" todo
then
case "$todo" in
p[\ \ ]|pick[\ \ ]*)
r="|CHERRY-PICKING"
return 0
;;
revert[\ \ ]*)
r="|REVERTING"
return 0
;;
esac
fi
return 1
}
# __git_ps1 accepts 0 or 1 arguments (i.e., format string)
# when called from PS1 using command substitution
# in this mode it prints text to add to bash PS1 prompt (includes branch name)
#
# __git_ps1 requires 2 or 3 arguments when called from PROMPT_COMMAND (pc)
# in that case it _sets_ PS1. The arguments are parts of a PS1 string.
# when two arguments are given, the first is prepended and the second appended
# to the state string when assigned to PS1.
# The optional third parameter will be used as printf format string to further
# customize the output of the git-status string.
# In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
__git_ps1 ()
{
# preserve exit status
local exit="$?"
local pcmode=no
local detached=no
local ps1pc_start='\u@\h:\w '
local ps1pc_end='\$ '
local printf_format=' (%s)'
case "$#" in
2|3) pcmode=yes
ps1pc_start="$1"
ps1pc_end="$2"
printf_format="${3:-$printf_format}"
# set PS1 to a plain prompt so that we can
# simply return early if the prompt should not
# be decorated
PS1="$ps1pc_start$ps1pc_end"
;;
0|1) printf_format="${1:-$printf_format}"
;;
*) return "$exit"
;;
esac
# ps1_expanded: This variable is set to 'yes' if the shell
# subjects the value of PS1 to parameter expansion:
#
# * bash does unless the promptvars option is disabled
# * zsh does not unless the PROMPT_SUBST option is set
# * POSIX shells always do
#
# If the shell would expand the contents of PS1 when drawing
# the prompt, a raw ref name must not be included in PS1.
# This protects the user from arbitrary code execution via
# specially crafted ref names. For example, a ref named
# 'refs/heads/$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)' might cause the
# shell to execute 'sudo rm -rf /' when the prompt is drawn.
#
# Instead, the ref name should be placed in a separate global
# variable (in the __git_ps1_* namespace to avoid colliding
# with the user's environment) and that variable should be
# referenced from PS1. For example:
#
# __git_ps1_foo=$(do_something_to_get_ref_name)
# PS1="...stuff...\${__git_ps1_foo}...stuff..."
#
# If the shell does not expand the contents of PS1, the raw
# ref name must be included in PS1.
#
# The value of this variable is only relevant when in pcmode.
#
# Assume that the shell follows the POSIX specification and
# expands PS1 unless determined otherwise. (This is more
# likely to be correct if the user has a non-bash, non-zsh
# shell and safer than the alternative if the assumption is
# incorrect.)
#
local ps1_expanded=yes
[ -z "${ZSH_VERSION-}" ] || eval '[[ -o PROMPT_SUBST ]]' || ps1_expanded=no
[ -z "${BASH_VERSION-}" ] || shopt -q promptvars || ps1_expanded=no
local repo_info rev_parse_exit_code
repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
--is-bare-repository --is-inside-work-tree --show-ref-format \
--short HEAD 2>/dev/null)"
rev_parse_exit_code="$?"
if [ -z "$repo_info" ]; then
return "$exit"
fi
local LF="$__git_LF"
local short_sha=""
if [ "$rev_parse_exit_code" = "0" ]; then
short_sha="${repo_info##*$LF}"
repo_info="${repo_info%$LF*}"
fi
local ref_format="${repo_info##*$LF}"
repo_info="${repo_info%$LF*}"
local inside_worktree="${repo_info##*$LF}"
repo_info="${repo_info%$LF*}"
local bare_repo="${repo_info##*$LF}"
repo_info="${repo_info%$LF*}"
local inside_gitdir="${repo_info##*$LF}"
local g="${repo_info%$LF*}"
if [ "true" = "$inside_worktree" ] &&
[ -n "${GIT_PS1_HIDE_IF_PWD_IGNORED-}" ] &&
[ "$(git config --bool bash.hideIfPwdIgnored)" != "false" ] &&
git check-ignore -q .
then
return "$exit"
fi
local sparse=""
if [ -z "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
[ -z "${GIT_PS1_OMITSPARSESTATE-}" ] &&
[ "$(git config --bool core.sparseCheckout)" = "true" ]; then
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
case $head in
"ref: "*)
head="${head#ref: }"
;;
*)
head=""
esac
;;
*)
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 <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi><mi>t</mi><mi>e</mi><mi>p</mi><mi mathvariant="normal">/</mi></mrow><annotation encoding="application/x-tex">step/</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal">e</span><span class="mord mathnormal">p</span><span class="mord">/</span></span></span></span>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"
}