debian: new upstream point release
[git/debian.git] / contrib / completion / git-prompt.sh
blob5330e769a72a86df6c4d2e47d796bc4e0cb90773
1 # bash/zsh git prompt support
3 # Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
4 # Distributed under the GNU General Public License, version 2.0.
6 # This script allows you to see repository status in your prompt.
8 # To enable:
10 # 1) Copy this file to somewhere (e.g. ~/.git-prompt.sh).
11 # 2) Add the following line to your .bashrc/.zshrc:
12 # source ~/.git-prompt.sh
13 # 3a) Change your PS1 to call __git_ps1 as
14 # command-substitution:
15 # Bash: PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '
16 # ZSH: setopt PROMPT_SUBST ; PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
17 # the optional argument will be used as format string.
18 # 3b) Alternatively, for a slightly faster prompt, __git_ps1 can
19 # be used for PROMPT_COMMAND in Bash or for precmd() in Zsh
20 # with two parameters, <pre> and <post>, which are strings
21 # you would put in $PS1 before and after the status string
22 # generated by the git-prompt machinery. e.g.
23 # Bash: PROMPT_COMMAND='__git_ps1 "\u@\h:\w" "\\\$ "'
24 # will show username, at-sign, host, colon, cwd, then
25 # various status string, followed by dollar and SP, as
26 # your prompt.
27 # ZSH: precmd () { __git_ps1 "%n" ":%~$ " "|%s" }
28 # will show username, pipe, then various status string,
29 # followed by colon, cwd, dollar and SP, as your prompt.
30 # Optionally, you can supply a third argument with a printf
31 # format string to finetune the output of the branch status
33 # The repository status will be displayed only if you are currently in a
34 # git repository. The %s token is the placeholder for the shown status.
36 # The prompt status always includes the current branch name.
38 # In addition, if you set GIT_PS1_SHOWDIRTYSTATE to a nonempty value,
39 # unstaged (*) and staged (+) changes will be shown next to the branch
40 # name. You can configure this per-repository with the
41 # bash.showDirtyState variable, which defaults to true once
42 # GIT_PS1_SHOWDIRTYSTATE is enabled.
44 # You can also see if currently something is stashed, by setting
45 # GIT_PS1_SHOWSTASHSTATE to a nonempty value. If something is stashed,
46 # then a '$' will be shown next to the branch name.
48 # If you would like to see if there're untracked files, then you can set
49 # GIT_PS1_SHOWUNTRACKEDFILES to a nonempty value. If there're untracked
50 # files, then a '%' will be shown next to the branch name. You can
51 # configure this per-repository with the bash.showUntrackedFiles
52 # variable, which defaults to true once GIT_PS1_SHOWUNTRACKEDFILES is
53 # enabled.
55 # If you would like to see the difference between HEAD and its upstream,
56 # set GIT_PS1_SHOWUPSTREAM="auto". A "<" indicates you are behind, ">"
57 # indicates you are ahead, "<>" indicates you have diverged and "="
58 # indicates that there is no difference. You can further control
59 # behaviour by setting GIT_PS1_SHOWUPSTREAM to a space-separated list
60 # of values:
62 # verbose show number of commits ahead/behind (+/-) upstream
63 # name if verbose, then also show the upstream abbrev name
64 # legacy don't use the '--count' option available in recent
65 # versions of git-rev-list
66 # git always compare HEAD to @{upstream}
67 # svn always compare HEAD to your SVN upstream
69 # By default, __git_ps1 will compare HEAD to your SVN upstream if it can
70 # find one, or @{upstream} otherwise. Once you have set
71 # GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
72 # setting the bash.showUpstream config variable.
74 # You can change the separator between the branch name and the above
75 # state symbols by setting GIT_PS1_STATESEPARATOR. The default separator
76 # is SP.
78 # When there is an in-progress operation such as a merge, rebase,
79 # revert, cherry-pick, or bisect, the prompt will include information
80 # related to the operation, often in the form "|<OPERATION-NAME>".
82 # When the repository has a sparse-checkout, a notification of the form
83 # "|SPARSE" will be included in the prompt. This can be shortened to a
84 # single '?' character by setting GIT_PS1_COMPRESSSPARSESTATE, or omitted
85 # by setting GIT_PS1_OMITSPARSESTATE.
87 # If you would like to see a notification on the prompt when there are
88 # unresolved conflicts, set GIT_PS1_SHOWCONFLICTSTATE to "yes". The
89 # prompt will include "|CONFLICT".
91 # If you would like to see more information about the identity of
92 # commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE
93 # to one of these values:
95 # contains relative to newer annotated tag (v1.6.3.2~35)
96 # branch relative to newer tag or branch (master~4)
97 # describe relative to older annotated tag (v1.6.3.1-13-gdd42c2f)
98 # tag relative to any older tag (v1.6.3.1-13-gdd42c2f)
99 # default exactly matching tag
101 # If you would like a colored hint about the current dirty state, set
102 # GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on
103 # the colored output of "git status -sb".
105 # If you would like __git_ps1 to do nothing in the case when the current
106 # directory is set up to be ignored by git, then set
107 # GIT_PS1_HIDE_IF_PWD_IGNORED to a nonempty value. Override this on the
108 # repository level by setting bash.hideIfPwdIgnored to "false".
110 # check whether printf supports -v
111 __git_printf_supports_v=
112 printf -v __git_printf_supports_v -- '%s' yes >/dev/null 2>&1
114 # stores the divergence from upstream in $p
115 # used by GIT_PS1_SHOWUPSTREAM
116 __git_ps1_show_upstream ()
118 local key value
119 local svn_remote svn_url_pattern count n
120 local upstream_type=git legacy="" verbose="" name=""
122 svn_remote=()
123 # get some config options from git-config
124 local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
125 while read -r key value; do
126 case "$key" in
127 bash.showupstream)
128 GIT_PS1_SHOWUPSTREAM="$value"
129 if [[ -z "${GIT_PS1_SHOWUPSTREAM}" ]]; then
130 p=""
131 return
134 svn-remote.*.url)
135 svn_remote[$((${#svn_remote[@]} + 1))]="$value"
136 svn_url_pattern="$svn_url_pattern\\|$value"
137 upstream_type=svn+git # default upstream type is SVN if available, else git
139 esac
140 done <<< "$output"
142 # parse configuration values
143 local option
144 for option in ${GIT_PS1_SHOWUPSTREAM-}; do
145 case "$option" in
146 git|svn) upstream_type="$option" ;;
147 verbose) verbose=1 ;;
148 legacy) legacy=1 ;;
149 name) name=1 ;;
150 esac
151 done
153 # Find our upstream type
154 case "$upstream_type" in
155 git) upstream_type="@{upstream}" ;;
156 svn*)
157 # get the upstream from the "git-svn-id: ..." in a commit message
158 # (git-svn uses essentially the same procedure internally)
159 local -a svn_upstream
160 svn_upstream=($(git log --first-parent -1 \
161 --grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null))
162 if [[ 0 -ne ${#svn_upstream[@]} ]]; then
163 svn_upstream=${svn_upstream[${#svn_upstream[@]} - 2]}
164 svn_upstream=${svn_upstream%@*}
165 local n_stop="${#svn_remote[@]}"
166 for ((n=1; n <= n_stop; n++)); do
167 svn_upstream=${svn_upstream#${svn_remote[$n]}}
168 done
170 if [[ -z "$svn_upstream" ]]; then
171 # default branch name for checkouts with no layout:
172 upstream_type=${GIT_SVN_ID:-git-svn}
173 else
174 upstream_type=${svn_upstream#/}
176 elif [[ "svn+git" = "$upstream_type" ]]; then
177 upstream_type="@{upstream}"
180 esac
182 # Find how many commits we are ahead/behind our upstream
183 if [[ -z "$legacy" ]]; then
184 count="$(git rev-list --count --left-right \
185 "$upstream_type"...HEAD 2>/dev/null)"
186 else
187 # produce equivalent output to --count for older versions of git
188 local commits
189 if commits="$(git rev-list --left-right "$upstream_type"...HEAD 2>/dev/null)"
190 then
191 local commit behind=0 ahead=0
192 for commit in $commits
194 case "$commit" in
195 "<"*) ((behind++)) ;;
196 *) ((ahead++)) ;;
197 esac
198 done
199 count="$behind $ahead"
200 else
201 count=""
205 # calculate the result
206 if [[ -z "$verbose" ]]; then
207 case "$count" in
208 "") # no upstream
209 p="" ;;
210 "0 0") # equal to upstream
211 p="=" ;;
212 "0 "*) # ahead of upstream
213 p=">" ;;
214 *" 0") # behind upstream
215 p="<" ;;
216 *) # diverged from upstream
217 p="<>" ;;
218 esac
219 else # verbose, set upstream instead of p
220 case "$count" in
221 "") # no upstream
222 upstream="" ;;
223 "0 0") # equal to upstream
224 upstream="|u=" ;;
225 "0 "*) # ahead of upstream
226 upstream="|u+${count#0 }" ;;
227 *" 0") # behind upstream
228 upstream="|u-${count% 0}" ;;
229 *) # diverged from upstream
230 upstream="|u+${count#* }-${count% *}" ;;
231 esac
232 if [[ -n "$count" && -n "$name" ]]; then
233 __git_ps1_upstream_name=$(git rev-parse \
234 --abbrev-ref "$upstream_type" 2>/dev/null)
235 if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
236 upstream="$upstream \${__git_ps1_upstream_name}"
237 else
238 upstream="$upstream ${__git_ps1_upstream_name}"
239 # not needed anymore; keep user's
240 # environment clean
241 unset __git_ps1_upstream_name
248 # Helper function that is meant to be called from __git_ps1. It
249 # injects color codes into the appropriate gitstring variables used
250 # to build a gitstring. Colored variables are responsible for clearing
251 # their own color.
252 __git_ps1_colorize_gitstring ()
254 if [[ -n ${ZSH_VERSION-} ]]; then
255 local c_red='%F{red}'
256 local c_green='%F{green}'
257 local c_lblue='%F{blue}'
258 local c_clear='%f'
259 else
260 # Using \001 and \002 around colors is necessary to prevent
261 # issues with command line editing/browsing/completion!
262 local c_red=$'\001\e[31m\002'
263 local c_green=$'\001\e[32m\002'
264 local c_lblue=$'\001\e[1;34m\002'
265 local c_clear=$'\001\e[0m\002'
267 local bad_color=$c_red
268 local ok_color=$c_green
269 local flags_color="$c_lblue"
271 local branch_color=""
272 if [ $detached = no ]; then
273 branch_color="$ok_color"
274 else
275 branch_color="$bad_color"
277 if [ -n "$c" ]; then
278 c="$branch_color$c$c_clear"
280 b="$branch_color$b$c_clear"
282 if [ -n "$w" ]; then
283 w="$bad_color$w$c_clear"
285 if [ -n "$i" ]; then
286 i="$ok_color$i$c_clear"
288 if [ -n "$s" ]; then
289 s="$flags_color$s$c_clear"
291 if [ -n "$u" ]; then
292 u="$bad_color$u$c_clear"
296 # Helper function to read the first line of a file into a variable.
297 # __git_eread requires 2 arguments, the file path and the name of the
298 # variable, in that order.
299 __git_eread ()
301 test -r "$1" && IFS=$'\r\n' read -r "$2" <"$1"
304 # see if a cherry-pick or revert is in progress, if the user has committed a
305 # conflict resolution with 'git commit' in the middle of a sequence of picks or
306 # reverts then CHERRY_PICK_HEAD/REVERT_HEAD will not exist so we have to read
307 # the todo file.
308 __git_sequencer_status ()
310 local todo
311 if test -f "$g/CHERRY_PICK_HEAD"
312 then
313 r="|CHERRY-PICKING"
314 return 0;
315 elif test -f "$g/REVERT_HEAD"
316 then
317 r="|REVERTING"
318 return 0;
319 elif __git_eread "$g/sequencer/todo" todo
320 then
321 case "$todo" in
322 p[\ \ ]|pick[\ \ ]*)
323 r="|CHERRY-PICKING"
324 return 0
326 revert[\ \ ]*)
327 r="|REVERTING"
328 return 0
330 esac
332 return 1
335 # __git_ps1 accepts 0 or 1 arguments (i.e., format string)
336 # when called from PS1 using command substitution
337 # in this mode it prints text to add to bash PS1 prompt (includes branch name)
339 # __git_ps1 requires 2 or 3 arguments when called from PROMPT_COMMAND (pc)
340 # in that case it _sets_ PS1. The arguments are parts of a PS1 string.
341 # when two arguments are given, the first is prepended and the second appended
342 # to the state string when assigned to PS1.
343 # The optional third parameter will be used as printf format string to further
344 # customize the output of the git-status string.
345 # In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
346 __git_ps1 ()
348 # preserve exit status
349 local exit=$?
350 local pcmode=no
351 local detached=no
352 local ps1pc_start='\u@\h:\w '
353 local ps1pc_end='\$ '
354 local printf_format=' (%s)'
356 case "$#" in
357 2|3) pcmode=yes
358 ps1pc_start="$1"
359 ps1pc_end="$2"
360 printf_format="${3:-$printf_format}"
361 # set PS1 to a plain prompt so that we can
362 # simply return early if the prompt should not
363 # be decorated
364 PS1="$ps1pc_start$ps1pc_end"
366 0|1) printf_format="${1:-$printf_format}"
368 *) return $exit
370 esac
372 # ps1_expanded: This variable is set to 'yes' if the shell
373 # subjects the value of PS1 to parameter expansion:
375 # * bash does unless the promptvars option is disabled
376 # * zsh does not unless the PROMPT_SUBST option is set
377 # * POSIX shells always do
379 # If the shell would expand the contents of PS1 when drawing
380 # the prompt, a raw ref name must not be included in PS1.
381 # This protects the user from arbitrary code execution via
382 # specially crafted ref names. For example, a ref named
383 # 'refs/heads/$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)' might cause the
384 # shell to execute 'sudo rm -rf /' when the prompt is drawn.
386 # Instead, the ref name should be placed in a separate global
387 # variable (in the __git_ps1_* namespace to avoid colliding
388 # with the user's environment) and that variable should be
389 # referenced from PS1. For example:
391 # __git_ps1_foo=$(do_something_to_get_ref_name)
392 # PS1="...stuff...\${__git_ps1_foo}...stuff..."
394 # If the shell does not expand the contents of PS1, the raw
395 # ref name must be included in PS1.
397 # The value of this variable is only relevant when in pcmode.
399 # Assume that the shell follows the POSIX specification and
400 # expands PS1 unless determined otherwise. (This is more
401 # likely to be correct if the user has a non-bash, non-zsh
402 # shell and safer than the alternative if the assumption is
403 # incorrect.)
405 local ps1_expanded=yes
406 [ -z "${ZSH_VERSION-}" ] || [[ -o PROMPT_SUBST ]] || ps1_expanded=no
407 [ -z "${BASH_VERSION-}" ] || shopt -q promptvars || ps1_expanded=no
409 local repo_info rev_parse_exit_code
410 repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
411 --is-bare-repository --is-inside-work-tree --show-ref-format \
412 --short HEAD 2>/dev/null)"
413 rev_parse_exit_code="$?"
415 if [ -z "$repo_info" ]; then
416 return $exit
419 local short_sha=""
420 if [ "$rev_parse_exit_code" = "0" ]; then
421 short_sha="${repo_info##*$'\n'}"
422 repo_info="${repo_info%$'\n'*}"
424 local ref_format="${repo_info##*$'\n'}"
425 repo_info="${repo_info%$'\n'*}"
426 local inside_worktree="${repo_info##*$'\n'}"
427 repo_info="${repo_info%$'\n'*}"
428 local bare_repo="${repo_info##*$'\n'}"
429 repo_info="${repo_info%$'\n'*}"
430 local inside_gitdir="${repo_info##*$'\n'}"
431 local g="${repo_info%$'\n'*}"
433 if [ "true" = "$inside_worktree" ] &&
434 [ -n "${GIT_PS1_HIDE_IF_PWD_IGNORED-}" ] &&
435 [ "$(git config --bool bash.hideIfPwdIgnored)" != "false" ] &&
436 git check-ignore -q .
437 then
438 return $exit
441 local sparse=""
442 if [ -z "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
443 [ -z "${GIT_PS1_OMITSPARSESTATE-}" ] &&
444 [ "$(git config --bool core.sparseCheckout)" = "true" ]; then
445 sparse="|SPARSE"
448 local r=""
449 local b=""
450 local step=""
451 local total=""
452 if [ -d "$g/rebase-merge" ]; then
453 __git_eread "$g/rebase-merge/head-name" b
454 __git_eread "$g/rebase-merge/msgnum" step
455 __git_eread "$g/rebase-merge/end" total
456 r="|REBASE"
457 else
458 if [ -d "$g/rebase-apply" ]; then
459 __git_eread "$g/rebase-apply/next" step
460 __git_eread "$g/rebase-apply/last" total
461 if [ -f "$g/rebase-apply/rebasing" ]; then
462 __git_eread "$g/rebase-apply/head-name" b
463 r="|REBASE"
464 elif [ -f "$g/rebase-apply/applying" ]; then
465 r="|AM"
466 else
467 r="|AM/REBASE"
469 elif [ -f "$g/MERGE_HEAD" ]; then
470 r="|MERGING"
471 elif __git_sequencer_status; then
473 elif [ -f "$g/BISECT_LOG" ]; then
474 r="|BISECTING"
477 if [ -n "$b" ]; then
479 elif [ -h "$g/HEAD" ]; then
480 # symlink symbolic ref
481 b="$(git symbolic-ref HEAD 2>/dev/null)"
482 else
483 local head=""
485 case "$ref_format" in
486 files)
487 if ! __git_eread "$g/HEAD" head; then
488 return $exit
491 if [[ $head == "ref: "* ]]; then
492 head="${head#ref: }"
493 else
494 head=""
498 head="$(git symbolic-ref HEAD 2>/dev/null)"
500 esac
502 if test -z "$head"; then
503 detached=yes
504 b="$(
505 case "${GIT_PS1_DESCRIBE_STYLE-}" in
506 (contains)
507 git describe --contains HEAD ;;
508 (branch)
509 git describe --contains --all HEAD ;;
510 (tag)
511 git describe --tags HEAD ;;
512 (describe)
513 git describe HEAD ;;
514 (* | default)
515 git describe --tags --exact-match HEAD ;;
516 esac 2>/dev/null)" ||
518 b="$short_sha..."
519 b="($b)"
520 else
521 b="$head"
526 if [ -n "$step" ] && [ -n "$total" ]; then
527 r="$r $step/$total"
530 local conflict="" # state indicator for unresolved conflicts
531 if [[ "${GIT_PS1_SHOWCONFLICTSTATE-}" == "yes" ]] &&
532 [[ $(git ls-files --unmerged 2>/dev/null) ]]; then
533 conflict="|CONFLICT"
536 local w=""
537 local i=""
538 local s=""
539 local u=""
540 local h=""
541 local c=""
542 local p="" # short version of upstream state indicator
543 local upstream="" # verbose version of upstream state indicator
545 if [ "true" = "$inside_gitdir" ]; then
546 if [ "true" = "$bare_repo" ]; then
547 c="BARE:"
548 else
549 b="GIT_DIR!"
551 elif [ "true" = "$inside_worktree" ]; then
552 if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
553 [ "$(git config --bool bash.showDirtyState)" != "false" ]
554 then
555 git diff --no-ext-diff --quiet || w="*"
556 git diff --no-ext-diff --cached --quiet || i="+"
557 if [ -z "$short_sha" ] && [ -z "$i" ]; then
558 i="#"
561 if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ] &&
562 git rev-parse --verify --quiet refs/stash >/dev/null
563 then
564 s="$"
567 if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ] &&
568 [ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
569 git ls-files --others --exclude-standard --directory --no-empty-directory --error-unmatch -- ':/*' >/dev/null 2>/dev/null
570 then
571 u="%${ZSH_VERSION+%}"
574 if [ -n "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
575 [ "$(git config --bool core.sparseCheckout)" = "true" ]; then
576 h="?"
579 if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then
580 __git_ps1_show_upstream
584 local z="${GIT_PS1_STATESEPARATOR-" "}"
586 b=${b##refs/heads/}
587 if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
588 __git_ps1_branch_name=$b
589 b="\${__git_ps1_branch_name}"
592 if [ -n "${GIT_PS1_SHOWCOLORHINTS-}" ]; then
593 __git_ps1_colorize_gitstring
596 local f="$h$w$i$s$u$p"
597 local gitstring="$c$b${f:+$z$f}${sparse}$r${upstream}${conflict}"
599 if [ $pcmode = yes ]; then
600 if [ "${__git_printf_supports_v-}" != yes ]; then
601 gitstring=$(printf -- "$printf_format" "$gitstring")
602 else
603 printf -v gitstring -- "$printf_format" "$gitstring"
605 PS1="$ps1pc_start$gitstring$ps1pc_end"
606 else
607 printf -- "$printf_format" "$gitstring"
610 return $exit