git-prompt.sh 17 KB

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  1. # bash/zsh git prompt support
  2. #
  3. # Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
  4. # Distributed under the GNU General Public License, version 2.0.
  5. #
  6. # This script allows you to see repository status in your prompt.
  7. #
  8. # To enable:
  9. #
  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
  32. #
  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.
  35. #
  36. # The prompt status always includes the current branch name.
  37. #
  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.
  43. #
  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.
  47. #
  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.
  54. #
  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:
  61. #
  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
  68. #
  69. # You can change the separator between the branch name and the above
  70. # state symbols by setting GIT_PS1_STATESEPARATOR. The default separator
  71. # is SP.
  72. #
  73. # When there is an in-progress operation such as a merge, rebase,
  74. # revert, cherry-pick, or bisect, the prompt will include information
  75. # related to the operation, often in the form "|<OPERATION-NAME>".
  76. #
  77. # When the repository has a sparse-checkout, a notification of the form
  78. # "|SPARSE" will be included in the prompt. This can be shortened to a
  79. # single '?' character by setting GIT_PS1_COMPRESSSPARSESTATE, or omitted
  80. # by setting GIT_PS1_OMITSPARSESTATE.
  81. #
  82. # By default, __git_ps1 will compare HEAD to your SVN upstream if it can
  83. # find one, or @{upstream} otherwise. Once you have set
  84. # GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
  85. # setting the bash.showUpstream config variable.
  86. #
  87. # If you would like to see more information about the identity of
  88. # commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE
  89. # to one of these values:
  90. #
  91. # contains relative to newer annotated tag (v1.6.3.2~35)
  92. # branch relative to newer tag or branch (master~4)
  93. # describe relative to older annotated tag (v1.6.3.1-13-gdd42c2f)
  94. # tag relative to any older tag (v1.6.3.1-13-gdd42c2f)
  95. # default exactly matching tag
  96. #
  97. # If you would like a colored hint about the current dirty state, set
  98. # GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on
  99. # the colored output of "git status -sb" and are available only when
  100. # using __git_ps1 for PROMPT_COMMAND or precmd in Bash,
  101. # but always available in Zsh.
  102. #
  103. # If you would like __git_ps1 to do nothing in the case when the current
  104. # directory is set up to be ignored by git, then set
  105. # GIT_PS1_HIDE_IF_PWD_IGNORED to a nonempty value. Override this on the
  106. # repository level by setting bash.hideIfPwdIgnored to "false".
  107. # check whether printf supports -v
  108. __git_printf_supports_v=
  109. printf -v __git_printf_supports_v -- '%s' yes >/dev/null 2>&1
  110. # stores the divergence from upstream in $p
  111. # used by GIT_PS1_SHOWUPSTREAM
  112. __git_ps1_show_upstream ()
  113. {
  114. local key value
  115. local svn_remote svn_url_pattern count n
  116. local upstream=git legacy="" verbose="" name=""
  117. svn_remote=()
  118. # get some config options from git-config
  119. local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
  120. while read -r key value; do
  121. case "$key" in
  122. bash.showupstream)
  123. GIT_PS1_SHOWUPSTREAM="$value"
  124. if [[ -z "${GIT_PS1_SHOWUPSTREAM}" ]]; then
  125. p=""
  126. return
  127. fi
  128. ;;
  129. svn-remote.*.url)
  130. svn_remote[$((${#svn_remote[@]} + 1))]="$value"
  131. svn_url_pattern="$svn_url_pattern\\|$value"
  132. upstream=svn+git # default upstream is SVN if available, else git
  133. ;;
  134. esac
  135. done <<< "$output"
  136. # parse configuration values
  137. local option
  138. for option in ${GIT_PS1_SHOWUPSTREAM}; do
  139. case "$option" in
  140. git|svn) upstream="$option" ;;
  141. verbose) verbose=1 ;;
  142. legacy) legacy=1 ;;
  143. name) name=1 ;;
  144. esac
  145. done
  146. # Find our upstream
  147. case "$upstream" in
  148. git) upstream="@{upstream}" ;;
  149. svn*)
  150. # get the upstream from the "git-svn-id: ..." in a commit message
  151. # (git-svn uses essentially the same procedure internally)
  152. local -a svn_upstream
  153. svn_upstream=($(git log --first-parent -1 \
  154. --grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null))
  155. if [[ 0 -ne ${#svn_upstream[@]} ]]; then
  156. svn_upstream=${svn_upstream[${#svn_upstream[@]} - 2]}
  157. svn_upstream=${svn_upstream%@*}
  158. local n_stop="${#svn_remote[@]}"
  159. for ((n=1; n <= n_stop; n++)); do
  160. svn_upstream=${svn_upstream#${svn_remote[$n]}}
  161. done
  162. if [[ -z "$svn_upstream" ]]; then
  163. # default branch name for checkouts with no layout:
  164. upstream=${GIT_SVN_ID:-git-svn}
  165. else
  166. upstream=${svn_upstream#/}
  167. fi
  168. elif [[ "svn+git" = "$upstream" ]]; then
  169. upstream="@{upstream}"
  170. fi
  171. ;;
  172. esac
  173. # Find how many commits we are ahead/behind our upstream
  174. if [[ -z "$legacy" ]]; then
  175. count="$(git rev-list --count --left-right \
  176. "$upstream"...HEAD 2>/dev/null)"
  177. else
  178. # produce equivalent output to --count for older versions of git
  179. local commits
  180. if commits="$(git rev-list --left-right "$upstream"...HEAD 2>/dev/null)"
  181. then
  182. local commit behind=0 ahead=0
  183. for commit in $commits
  184. do
  185. case "$commit" in
  186. "<"*) ((behind++)) ;;
  187. *) ((ahead++)) ;;
  188. esac
  189. done
  190. count="$behind $ahead"
  191. else
  192. count=""
  193. fi
  194. fi
  195. # calculate the result
  196. if [[ -z "$verbose" ]]; then
  197. case "$count" in
  198. "") # no upstream
  199. p="" ;;
  200. "0 0") # equal to upstream
  201. p="=" ;;
  202. "0 "*) # ahead of upstream
  203. p=">" ;;
  204. *" 0") # behind upstream
  205. p="<" ;;
  206. *) # diverged from upstream
  207. p="<>" ;;
  208. esac
  209. else
  210. case "$count" in
  211. "") # no upstream
  212. p="" ;;
  213. "0 0") # equal to upstream
  214. p=" u=" ;;
  215. "0 "*) # ahead of upstream
  216. p=" u+${count#0 }" ;;
  217. *" 0") # behind upstream
  218. p=" u-${count% 0}" ;;
  219. *) # diverged from upstream
  220. p=" u+${count#* }-${count% *}" ;;
  221. esac
  222. if [[ -n "$count" && -n "$name" ]]; then
  223. __git_ps1_upstream_name=$(git rev-parse \
  224. --abbrev-ref "$upstream" 2>/dev/null)
  225. if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
  226. p="$p \${__git_ps1_upstream_name}"
  227. else
  228. p="$p ${__git_ps1_upstream_name}"
  229. # not needed anymore; keep user's
  230. # environment clean
  231. unset __git_ps1_upstream_name
  232. fi
  233. fi
  234. fi
  235. }
  236. # Helper function that is meant to be called from __git_ps1. It
  237. # injects color codes into the appropriate gitstring variables used
  238. # to build a gitstring.
  239. __git_ps1_colorize_gitstring ()
  240. {
  241. if [[ -n ${ZSH_VERSION-} ]]; then
  242. local c_red='%F{red}'
  243. local c_green='%F{green}'
  244. local c_lblue='%F{blue}'
  245. local c_clear='%f'
  246. else
  247. # Using \[ and \] around colors is necessary to prevent
  248. # issues with command line editing/browsing/completion!
  249. local c_red='\[\e[31m\]'
  250. local c_green='\[\e[32m\]'
  251. local c_lblue='\[\e[1;34m\]'
  252. local c_clear='\[\e[0m\]'
  253. fi
  254. local bad_color=$c_red
  255. local ok_color=$c_green
  256. local flags_color="$c_lblue"
  257. local branch_color=""
  258. if [ $detached = no ]; then
  259. branch_color="$ok_color"
  260. else
  261. branch_color="$bad_color"
  262. fi
  263. c="$branch_color$c"
  264. z="$c_clear$z"
  265. if [ "$w" = "*" ]; then
  266. w="$bad_color$w"
  267. fi
  268. if [ -n "$i" ]; then
  269. i="$ok_color$i"
  270. fi
  271. if [ -n "$s" ]; then
  272. s="$flags_color$s"
  273. fi
  274. if [ -n "$u" ]; then
  275. u="$bad_color$u"
  276. fi
  277. r="$c_clear$r"
  278. }
  279. # Helper function to read the first line of a file into a variable.
  280. # __git_eread requires 2 arguments, the file path and the name of the
  281. # variable, in that order.
  282. __git_eread ()
  283. {
  284. test -r "$1" && IFS=$'\r\n' read "$2" <"$1"
  285. }
  286. # see if a cherry-pick or revert is in progress, if the user has committed a
  287. # conflict resolution with 'git commit' in the middle of a sequence of picks or
  288. # reverts then CHERRY_PICK_HEAD/REVERT_HEAD will not exist so we have to read
  289. # the todo file.
  290. __git_sequencer_status ()
  291. {
  292. local todo
  293. if test -f "$g/CHERRY_PICK_HEAD"
  294. then
  295. r="|CHERRY-PICKING"
  296. return 0;
  297. elif test -f "$g/REVERT_HEAD"
  298. then
  299. r="|REVERTING"
  300. return 0;
  301. elif __git_eread "$g/sequencer/todo" todo
  302. then
  303. case "$todo" in
  304. p[\ \ ]|pick[\ \ ]*)
  305. r="|CHERRY-PICKING"
  306. return 0
  307. ;;
  308. revert[\ \ ]*)
  309. r="|REVERTING"
  310. return 0
  311. ;;
  312. esac
  313. fi
  314. return 1
  315. }
  316. # __git_ps1 accepts 0 or 1 arguments (i.e., format string)
  317. # when called from PS1 using command substitution
  318. # in this mode it prints text to add to bash PS1 prompt (includes branch name)
  319. #
  320. # __git_ps1 requires 2 or 3 arguments when called from PROMPT_COMMAND (pc)
  321. # in that case it _sets_ PS1. The arguments are parts of a PS1 string.
  322. # when two arguments are given, the first is prepended and the second appended
  323. # to the state string when assigned to PS1.
  324. # The optional third parameter will be used as printf format string to further
  325. # customize the output of the git-status string.
  326. # In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
  327. __git_ps1 ()
  328. {
  329. # preserve exit status
  330. local exit=$?
  331. local pcmode=no
  332. local detached=no
  333. local ps1pc_start='\u@\h:\w '
  334. local ps1pc_end='\$ '
  335. local printf_format=' (%s)'
  336. case "$#" in
  337. 2|3) pcmode=yes
  338. ps1pc_start="$1"
  339. ps1pc_end="$2"
  340. printf_format="${3:-$printf_format}"
  341. # set PS1 to a plain prompt so that we can
  342. # simply return early if the prompt should not
  343. # be decorated
  344. PS1="$ps1pc_start$ps1pc_end"
  345. ;;
  346. 0|1) printf_format="${1:-$printf_format}"
  347. ;;
  348. *) return $exit
  349. ;;
  350. esac
  351. # ps1_expanded: This variable is set to 'yes' if the shell
  352. # subjects the value of PS1 to parameter expansion:
  353. #
  354. # * bash does unless the promptvars option is disabled
  355. # * zsh does not unless the PROMPT_SUBST option is set
  356. # * POSIX shells always do
  357. #
  358. # If the shell would expand the contents of PS1 when drawing
  359. # the prompt, a raw ref name must not be included in PS1.
  360. # This protects the user from arbitrary code execution via
  361. # specially crafted ref names. For example, a ref named
  362. # 'refs/heads/$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)' might cause the
  363. # shell to execute 'sudo rm -rf /' when the prompt is drawn.
  364. #
  365. # Instead, the ref name should be placed in a separate global
  366. # variable (in the __git_ps1_* namespace to avoid colliding
  367. # with the user's environment) and that variable should be
  368. # referenced from PS1. For example:
  369. #
  370. # __git_ps1_foo=$(do_something_to_get_ref_name)
  371. # PS1="...stuff...\${__git_ps1_foo}...stuff..."
  372. #
  373. # If the shell does not expand the contents of PS1, the raw
  374. # ref name must be included in PS1.
  375. #
  376. # The value of this variable is only relevant when in pcmode.
  377. #
  378. # Assume that the shell follows the POSIX specification and
  379. # expands PS1 unless determined otherwise. (This is more
  380. # likely to be correct if the user has a non-bash, non-zsh
  381. # shell and safer than the alternative if the assumption is
  382. # incorrect.)
  383. #
  384. local ps1_expanded=yes
  385. [ -z "${ZSH_VERSION-}" ] || [[ -o PROMPT_SUBST ]] || ps1_expanded=no
  386. [ -z "${BASH_VERSION-}" ] || shopt -q promptvars || ps1_expanded=no
  387. local repo_info rev_parse_exit_code
  388. repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
  389. --is-bare-repository --is-inside-work-tree \
  390. --short HEAD 2>/dev/null)"
  391. rev_parse_exit_code="$?"
  392. if [ -z "$repo_info" ]; then
  393. return $exit
  394. fi
  395. local short_sha=""
  396. if [ "$rev_parse_exit_code" = "0" ]; then
  397. short_sha="${repo_info##*$'\n'}"
  398. repo_info="${repo_info%$'\n'*}"
  399. fi
  400. local inside_worktree="${repo_info##*$'\n'}"
  401. repo_info="${repo_info%$'\n'*}"
  402. local bare_repo="${repo_info##*$'\n'}"
  403. repo_info="${repo_info%$'\n'*}"
  404. local inside_gitdir="${repo_info##*$'\n'}"
  405. local g="${repo_info%$'\n'*}"
  406. if [ "true" = "$inside_worktree" ] &&
  407. [ -n "${GIT_PS1_HIDE_IF_PWD_IGNORED-}" ] &&
  408. [ "$(git config --bool bash.hideIfPwdIgnored)" != "false" ] &&
  409. git check-ignore -q .
  410. then
  411. return $exit
  412. fi
  413. local sparse=""
  414. if [ -z "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
  415. [ -z "${GIT_PS1_OMITSPARSESTATE-}" ] &&
  416. [ "$(git config --bool core.sparseCheckout)" = "true" ]; then
  417. sparse="|SPARSE"
  418. fi
  419. local r=""
  420. local b=""
  421. local step=""
  422. local total=""
  423. if [ -d "$g/rebase-merge" ]; then
  424. __git_eread "$g/rebase-merge/head-name" b
  425. __git_eread "$g/rebase-merge/msgnum" step
  426. __git_eread "$g/rebase-merge/end" total
  427. r="|REBASE"
  428. else
  429. if [ -d "$g/rebase-apply" ]; then
  430. __git_eread "$g/rebase-apply/next" step
  431. __git_eread "$g/rebase-apply/last" total
  432. if [ -f "$g/rebase-apply/rebasing" ]; then
  433. __git_eread "$g/rebase-apply/head-name" b
  434. r="|REBASE"
  435. elif [ -f "$g/rebase-apply/applying" ]; then
  436. r="|AM"
  437. else
  438. r="|AM/REBASE"
  439. fi
  440. elif [ -f "$g/MERGE_HEAD" ]; then
  441. r="|MERGING"
  442. elif __git_sequencer_status; then
  443. :
  444. elif [ -f "$g/BISECT_LOG" ]; then
  445. r="|BISECTING"
  446. fi
  447. if [ -n "$b" ]; then
  448. :
  449. elif [ -h "$g/HEAD" ]; then
  450. # symlink symbolic ref
  451. b="$(git symbolic-ref HEAD 2>/dev/null)"
  452. else
  453. local head=""
  454. if ! __git_eread "$g/HEAD" head; then
  455. return $exit
  456. fi
  457. # is it a symbolic ref?
  458. b="${head#ref: }"
  459. if [ "$head" = "$b" ]; then
  460. detached=yes
  461. b="$(
  462. case "${GIT_PS1_DESCRIBE_STYLE-}" in
  463. (contains)
  464. git describe --contains HEAD ;;
  465. (branch)
  466. git describe --contains --all HEAD ;;
  467. (tag)
  468. git describe --tags HEAD ;;
  469. (describe)
  470. git describe HEAD ;;
  471. (* | default)
  472. git describe --tags --exact-match HEAD ;;
  473. esac 2>/dev/null)" ||
  474. b="$short_sha..."
  475. b="($b)"
  476. fi
  477. fi
  478. fi
  479. if [ -n "$step" ] && [ -n "$total" ]; then
  480. r="$r $step/$total"
  481. fi
  482. local w=""
  483. local i=""
  484. local s=""
  485. local u=""
  486. local h=""
  487. local c=""
  488. local p=""
  489. if [ "true" = "$inside_gitdir" ]; then
  490. if [ "true" = "$bare_repo" ]; then
  491. c="BARE:"
  492. else
  493. b="GIT_DIR!"
  494. fi
  495. elif [ "true" = "$inside_worktree" ]; then
  496. if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
  497. [ "$(git config --bool bash.showDirtyState)" != "false" ]
  498. then
  499. git diff --no-ext-diff --quiet || w="*"
  500. git diff --no-ext-diff --cached --quiet || i="+"
  501. if [ -z "$short_sha" ] && [ -z "$i" ]; then
  502. i="#"
  503. fi
  504. fi
  505. if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ] &&
  506. git rev-parse --verify --quiet refs/stash >/dev/null
  507. then
  508. s="$"
  509. fi
  510. if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ] &&
  511. [ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
  512. git ls-files --others --exclude-standard --directory --no-empty-directory --error-unmatch -- ':/*' >/dev/null 2>/dev/null
  513. then
  514. u="%${ZSH_VERSION+%}"
  515. fi
  516. if [ -n "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
  517. [ "$(git config --bool core.sparseCheckout)" = "true" ]; then
  518. h="?"
  519. fi
  520. if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then
  521. __git_ps1_show_upstream
  522. fi
  523. fi
  524. local z="${GIT_PS1_STATESEPARATOR-" "}"
  525. # NO color option unless in PROMPT_COMMAND mode or it's Zsh
  526. if [ -n "${GIT_PS1_SHOWCOLORHINTS-}" ]; then
  527. if [ $pcmode = yes ] || [ -n "${ZSH_VERSION-}" ]; then
  528. __git_ps1_colorize_gitstring
  529. fi
  530. fi
  531. b=${b##refs/heads/}
  532. if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
  533. __git_ps1_branch_name=$b
  534. b="\${__git_ps1_branch_name}"
  535. fi
  536. local f="$h$w$i$s$u"
  537. local gitstring="$c$b${f:+$z$f}${sparse}$r$p"
  538. if [ $pcmode = yes ]; then
  539. if [ "${__git_printf_supports_v-}" != yes ]; then
  540. gitstring=$(printf -- "$printf_format" "$gitstring")
  541. else
  542. printf -v gitstring -- "$printf_format" "$gitstring"
  543. fi
  544. PS1="$ps1pc_start$gitstring$ps1pc_end"
  545. else
  546. printf -- "$printf_format" "$gitstring"
  547. fi
  548. return $exit
  549. }