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# By default, __git_ps1 will compare HEAD to your SVN upstream if it can 74# find one, or @{upstream} otherwise. Once you have set 75# GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by 76# setting the bash.showUpstream config variable. 77# 78# If you would like to see more information about the identity of 79# commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE 80# to one of these values: 81# 82# contains relative to newer annotated tag (v1.6.3.2~35) 83# branch relative to newer tag or branch (master~4) 84# describe relative to older annotated tag (v1.6.3.1-13-gdd42c2f) 85# default exactly matching tag 86# 87# If you would like a colored hint about the current dirty state, set 88# GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on 89# the colored output of "git status -sb" and are available only when 90# using __git_ps1 for PROMPT_COMMAND or precmd. 91# 92# If you would like __git_ps1 to do nothing in the case when the current 93# directory is set up to be ignored by git, then set 94# GIT_PS1_HIDE_IF_PWD_IGNORED to a nonempty value. Override this on the 95# repository level by setting bash.hideIfPwdIgnored to "false". 96 97# check whether printf supports -v 98__git_printf_supports_v= 99printf -v __git_printf_supports_v --'%s'yes>/dev/null 2>&1 100 101# stores the divergence from upstream in $p 102# used by GIT_PS1_SHOWUPSTREAM 103__git_ps1_show_upstream () 104{ 105local key value 106local svn_remote svn_url_pattern count n 107local upstream=git legacy="" verbose="" name="" 108 109 svn_remote=() 110# get some config options from git-config 111local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n')" 112whileread -r key value;do 113case"$key"in 114 bash.showupstream) 115 GIT_PS1_SHOWUPSTREAM="$value" 116if[[-z"${GIT_PS1_SHOWUPSTREAM}"]];then 117 p="" 118return 119fi 120;; 121 svn-remote.*.url) 122 svn_remote[$((${#svn_remote[@]} + 1))]="$value" 123 svn_url_pattern="$svn_url_pattern\\|$value" 124 upstream=svn+git # default upstream is SVN if available, else git 125;; 126esac 127done<<<"$output" 128 129# parse configuration values 130for option in${GIT_PS1_SHOWUPSTREAM};do 131case"$option"in 132 git|svn) upstream="$option";; 133 verbose) verbose=1;; 134 legacy) legacy=1;; 135 name) name=1;; 136esac 137done 138 139# Find our upstream 140case"$upstream"in 141 git) upstream="@{upstream}";; 142 svn*) 143# get the upstream from the "git-svn-id: ..." in a commit message 144# (git-svn uses essentially the same procedure internally) 145local -a svn_upstream 146 svn_upstream=($(git log --first-parent -1 \ 147--grep="^git-svn-id: \(${svn_url_pattern#??}\)"2>/dev/null)) 148if[[0-ne${#svn_upstream[@]}]];then 149 svn_upstream=${svn_upstream[${#svn_upstream[@]} - 2]} 150 svn_upstream=${svn_upstream%@*} 151local n_stop="${#svn_remote[@]}" 152for((n=1; n <= n_stop; n++));do 153 svn_upstream=${svn_upstream#${svn_remote[$n]}} 154done 155 156if[[-z"$svn_upstream"]];then 157# default branch name for checkouts with no layout: 158 upstream=${GIT_SVN_ID:-git-svn} 159else 160 upstream=${svn_upstream#/} 161fi 162elif[["svn+git"="$upstream"]];then 163 upstream="@{upstream}" 164fi 165;; 166esac 167 168# Find how many commits we are ahead/behind our upstream 169if[[-z"$legacy"]];then 170 count="$(git rev-list --count --left-right \ 171 "$upstream"...HEAD 2>/dev/null)" 172else 173# produce equivalent output to --count for older versions of git 174local commits 175if commits="$(git rev-list --left-right "$upstream"...HEAD 2>/dev/null)" 176then 177local commit behind=0 ahead=0 178for commit in$commits 179do 180case"$commit"in 181"<"*) ((behind++)) ;; 182*) ((ahead++)) ;; 183esac 184done 185 count="$behind$ahead" 186else 187 count="" 188fi 189fi 190 191# calculate the result 192if[[-z"$verbose"]];then 193case"$count"in 194"")# no upstream 195 p="";; 196"0 0")# equal to upstream 197 p="=";; 198"0 "*)# ahead of upstream 199 p=">";; 200*" 0")# behind upstream 201 p="<";; 202*)# diverged from upstream 203 p="<>";; 204esac 205else 206case"$count"in 207"")# no upstream 208 p="";; 209"0 0")# equal to upstream 210 p=" u=";; 211"0 "*)# ahead of upstream 212 p=" u+${count#0 }";; 213*" 0")# behind upstream 214 p=" u-${count% 0}";; 215*)# diverged from upstream 216 p=" u+${count#* }-${count% *}";; 217esac 218if[[-n"$count"&&-n"$name"]];then 219 __git_ps1_upstream_name=$(git rev-parse \ 220--abbrev-ref"$upstream"2>/dev/null) 221if[$pcmode=yes] && [$ps1_expanded=yes];then 222 p="$p\${__git_ps1_upstream_name}" 223else 224 p="$p${__git_ps1_upstream_name}" 225# not needed anymore; keep user's 226# environment clean 227unset __git_ps1_upstream_name 228fi 229fi 230fi 231 232} 233 234# Helper function that is meant to be called from __git_ps1. It 235# injects color codes into the appropriate gitstring variables used 236# to build a gitstring. 237__git_ps1_colorize_gitstring () 238{ 239if[[-n${ZSH_VERSION-}]];then 240local c_red='%F{red}' 241local c_green='%F{green}' 242local c_lblue='%F{blue}' 243local c_clear='%f' 244else 245# Using \[ and \] around colors is necessary to prevent 246# issues with command line editing/browsing/completion! 247local c_red='\[\e[31m\]' 248local c_green='\[\e[32m\]' 249local c_lblue='\[\e[1;34m\]' 250local c_clear='\[\e[0m\]' 251fi 252local bad_color=$c_red 253local ok_color=$c_green 254local flags_color="$c_lblue" 255 256local branch_color="" 257if[$detached= no ];then 258 branch_color="$ok_color" 259else 260 branch_color="$bad_color" 261fi 262 c="$branch_color$c" 263 264 z="$c_clear$z" 265if["$w"="*"];then 266 w="$bad_color$w" 267fi 268if[-n"$i"];then 269 i="$ok_color$i" 270fi 271if[-n"$s"];then 272 s="$flags_color$s" 273fi 274if[-n"$u"];then 275 u="$bad_color$u" 276fi 277 r="$c_clear$r" 278} 279 280__git_eread () 281{ 282local f="$1" 283shift 284test -r"$f"&&read"$@"<"$f" 285} 286 287# __git_ps1 accepts 0 or 1 arguments (i.e., format string) 288# when called from PS1 using command substitution 289# in this mode it prints text to add to bash PS1 prompt (includes branch name) 290# 291# __git_ps1 requires 2 or 3 arguments when called from PROMPT_COMMAND (pc) 292# in that case it _sets_ PS1. The arguments are parts of a PS1 string. 293# when two arguments are given, the first is prepended and the second appended 294# to the state string when assigned to PS1. 295# The optional third parameter will be used as printf format string to further 296# customize the output of the git-status string. 297# In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true 298__git_ps1 () 299{ 300# preserve exit status 301local exit=$? 302local pcmode=no 303local detached=no 304local ps1pc_start='\u@\h:\w ' 305local ps1pc_end='\$ ' 306local printf_format=' (%s)' 307 308case"$#"in 3092|3) pcmode=yes 310 ps1pc_start="$1" 311 ps1pc_end="$2" 312 printf_format="${3:-$printf_format}" 313# set PS1 to a plain prompt so that we can 314# simply return early if the prompt should not 315# be decorated 316 PS1="$ps1pc_start$ps1pc_end" 317;; 3180|1) printf_format="${1:-$printf_format}" 319;; 320*)return$exit 321;; 322esac 323 324# ps1_expanded: This variable is set to 'yes' if the shell 325# subjects the value of PS1 to parameter expansion: 326# 327# * bash does unless the promptvars option is disabled 328# * zsh does not unless the PROMPT_SUBST option is set 329# * POSIX shells always do 330# 331# If the shell would expand the contents of PS1 when drawing 332# the prompt, a raw ref name must not be included in PS1. 333# This protects the user from arbitrary code execution via 334# specially crafted ref names. For example, a ref named 335# 'refs/heads/$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)' might cause the 336# shell to execute 'sudo rm -rf /' when the prompt is drawn. 337# 338# Instead, the ref name should be placed in a separate global 339# variable (in the __git_ps1_* namespace to avoid colliding 340# with the user's environment) and that variable should be 341# referenced from PS1. For example: 342# 343# __git_ps1_foo=$(do_something_to_get_ref_name) 344# PS1="...stuff...\${__git_ps1_foo}...stuff..." 345# 346# If the shell does not expand the contents of PS1, the raw 347# ref name must be included in PS1. 348# 349# The value of this variable is only relevant when in pcmode. 350# 351# Assume that the shell follows the POSIX specification and 352# expands PS1 unless determined otherwise. (This is more 353# likely to be correct if the user has a non-bash, non-zsh 354# shell and safer than the alternative if the assumption is 355# incorrect.) 356# 357local ps1_expanded=yes 358[-z"${ZSH_VERSION-}"] || [[-o PROMPT_SUBST ]] || ps1_expanded=no 359[-z"${BASH_VERSION-}"] ||shopt -q promptvars || ps1_expanded=no 360 361local repo_info rev_parse_exit_code 362 repo_info="$(git rev-parse --git-dir --is-inside-git-dir \ 363 --is-bare-repository --is-inside-work-tree \ 364 --short HEAD 2>/dev/null)" 365 rev_parse_exit_code="$?" 366 367if[-z"$repo_info"];then 368return$exit 369fi 370 371local short_sha="" 372if["$rev_parse_exit_code"="0"];then 373 short_sha="${repo_info##*$'\n'}" 374 repo_info="${repo_info%$'\n'*}" 375fi 376local inside_worktree="${repo_info##*$'\n'}" 377 repo_info="${repo_info%$'\n'*}" 378local bare_repo="${repo_info##*$'\n'}" 379 repo_info="${repo_info%$'\n'*}" 380local inside_gitdir="${repo_info##*$'\n'}" 381local g="${repo_info%$'\n'*}" 382 383if["true"="$inside_worktree"] && 384[-n"${GIT_PS1_HIDE_IF_PWD_IGNORED-}"] && 385["$(git config --bool bash.hideIfPwdIgnored)"!="false"] && 386 git check-ignore -q . 387then 388return$exit 389fi 390 391local r="" 392local b="" 393local step="" 394local total="" 395if[-d"$g/rebase-merge"];then 396 __git_eread "$g/rebase-merge/head-name" b 397 __git_eread "$g/rebase-merge/msgnum" step 398 __git_eread "$g/rebase-merge/end" total 399if[-f"$g/rebase-merge/interactive"];then 400 r="|REBASE-i" 401else 402 r="|REBASE-m" 403fi 404else 405if[-d"$g/rebase-apply"];then 406 __git_eread "$g/rebase-apply/next" step 407 __git_eread "$g/rebase-apply/last" total 408if[-f"$g/rebase-apply/rebasing"];then 409 __git_eread "$g/rebase-apply/head-name" b 410 r="|REBASE" 411elif[-f"$g/rebase-apply/applying"];then 412 r="|AM" 413else 414 r="|AM/REBASE" 415fi 416elif[-f"$g/MERGE_HEAD"];then 417 r="|MERGING" 418elif[-f"$g/CHERRY_PICK_HEAD"];then 419 r="|CHERRY-PICKING" 420elif[-f"$g/REVERT_HEAD"];then 421 r="|REVERTING" 422elif[-f"$g/BISECT_LOG"];then 423 r="|BISECTING" 424fi 425 426if[-n"$b"];then 427: 428elif[-h"$g/HEAD"];then 429# symlink symbolic ref 430 b="$(git symbolic-ref HEAD 2>/dev/null)" 431else 432localhead="" 433if! __git_eread "$g/HEAD"head;then 434return$exit 435fi 436# is it a symbolic ref? 437 b="${head#ref: }" 438if["$head"="$b"];then 439 detached=yes 440 b="$( 441 case "${GIT_PS1_DESCRIBE_STYLE-}" in 442 (contains) 443 git describe --contains HEAD ;; 444 (branch) 445 git describe --contains --all HEAD ;; 446 (describe) 447 git describe HEAD ;; 448 (* | default) 449 git describe --tags --exact-match HEAD ;; 450 esac 2>/dev/null)"|| 451 452 b="$short_sha..." 453 b="($b)" 454fi 455fi 456fi 457 458if[-n"$step"] && [-n"$total"];then 459 r="$r$step/$total" 460fi 461 462local w="" 463local i="" 464local s="" 465local u="" 466local c="" 467local p="" 468 469if["true"="$inside_gitdir"];then 470if["true"="$bare_repo"];then 471 c="BARE:" 472else 473 b="GIT_DIR!" 474fi 475elif["true"="$inside_worktree"];then 476if[-n"${GIT_PS1_SHOWDIRTYSTATE-}"] && 477["$(git config --bool bash.showDirtyState)"!="false"] 478then 479 git diff--no-ext-diff --quiet|| w="*" 480 git diff--no-ext-diff --cached --quiet|| i="+" 481if[-z"$short_sha"] && [-z"$i"];then 482 i="#" 483fi 484fi 485if[-n"${GIT_PS1_SHOWSTASHSTATE-}"] && 486 git rev-parse --verify --quiet refs/stash >/dev/null 487then 488 s="$" 489fi 490 491if[-n"${GIT_PS1_SHOWUNTRACKEDFILES-}"] && 492["$(git config --bool bash.showUntrackedFiles)"!="false"] && 493 git ls-files --others --exclude-standard --directory --no-empty-directory --error-unmatch --':/*'>/dev/null 2>/dev/null 494then 495 u="%${ZSH_VERSION+%}" 496fi 497 498if[-n"${GIT_PS1_SHOWUPSTREAM-}"];then 499 __git_ps1_show_upstream 500fi 501fi 502 503local z="${GIT_PS1_STATESEPARATOR-" "}" 504 505# NO color option unless in PROMPT_COMMAND mode 506if[$pcmode=yes] && [-n"${GIT_PS1_SHOWCOLORHINTS-}"];then 507 __git_ps1_colorize_gitstring 508fi 509 510 b=${b##refs/heads/} 511if[$pcmode=yes] && [$ps1_expanded=yes];then 512 __git_ps1_branch_name=$b 513 b="\${__git_ps1_branch_name}" 514fi 515 516local f="$w$i$s$u" 517local gitstring="$c$b${f:+$z$f}$r$p" 518 519if[$pcmode=yes];then 520if["${__git_printf_supports_v-}"!=yes];then 521 gitstring=$(printf -- "$printf_format" "$gitstring") 522else 523printf -v gitstring --"$printf_format""$gitstring" 524fi 525 PS1="$ps1pc_start$gitstring$ps1pc_end" 526else 527printf --"$printf_format""$gitstring" 528fi 529 530return$exit 531}