contrib/completion/git-prompt.sh

   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 #     legacy        don't use the '--count' option available in recent
  64 #                   versions of git-rev-list
  65 #     git           always compare HEAD to @{upstream}
  66 #     svn           always compare HEAD to your SVN upstream
  67 #
  68 # By default, __git_ps1 will compare HEAD to your SVN upstream if it can
  69 # find one, or @{upstream} otherwise.  Once you have set
  70 # GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
  71 # setting the bash.showUpstream config variable.
  72 #
  73 # If you would like to see more information about the identity of
  74 # commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE
  75 # to one of these values:
  76 #
  77 #     contains      relative to newer annotated tag (v1.6.3.2~35)
  78 #     branch        relative to newer tag or branch (master~4)
  79 #     describe      relative to older annotated tag (v1.6.3.1-13-gdd42c2f)
  80 #     default       exactly matching tag
  81 #
  82 # If you would like a colored hint about the current dirty state, set
  83 # GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on
  84 # the colored output of "git status -sb" and are available only when
  85 # using __git_ps1 for PROMPT_COMMAND or precmd.
  86
  87 # check whether printf supports -v
  88 __git_printf_supports_v=
  89 printf -v __git_printf_supports_v -- '%s' yes >/dev/null 2>&1
  90
  91 # stores the divergence from upstream in $p
  92 # used by GIT_PS1_SHOWUPSTREAM
  93 __git_ps1_show_upstream ()
  94 {
  95         local key value
  96         local svn_remote svn_url_pattern count n
  97         local upstream=git legacy="" verbose=""
  98
  99         svn_remote=()
 100         # get some config options from git-config
 101         local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
 102         while read -r key value; do
 103                 case "$key" in
 104                 bash.showupstream)
 105                         GIT_PS1_SHOWUPSTREAM="$value"
 106                         if [[ -z "${GIT_PS1_SHOWUPSTREAM}" ]]; then
 107                                 p=""
 108                                 return
 109                         fi
 110                         ;;
 111                 svn-remote.*.url)
 112                         svn_remote[$((${#svn_remote[@]} + 1))]="$value"
 113                         svn_url_pattern="$svn_url_pattern\\|$value"
 114                         upstream=svn+git # default upstream is SVN if available, else git
 115                         ;;
 116                 esac
 117         done <<< "$output"
 118
 119         # parse configuration values
 120         for option in ${GIT_PS1_SHOWUPSTREAM}; do
 121                 case "$option" in
 122                 git|svn) upstream="$option" ;;
 123                 verbose) verbose=1 ;;
 124                 legacy)  legacy=1  ;;
 125                 esac
 126         done
 127
 128         # Find our upstream
 129         case "$upstream" in
 130         git)    upstream="@{upstream}" ;;
 131         svn*)
 132                 # get the upstream from the "git-svn-id: ..." in a commit message
 133                 # (git-svn uses essentially the same procedure internally)
 134                 local -a svn_upstream
 135                 svn_upstream=($(git log --first-parent -1 \
 136                                         --grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null))
 137                 if [[ 0 -ne ${#svn_upstream[@]} ]]; then
 138                         svn_upstream=${svn_upstream[${#svn_upstream[@]} - 2]}
 139                         svn_upstream=${svn_upstream%@*}
 140                         local n_stop="${#svn_remote[@]}"
 141                         for ((n=1; n <= n_stop; n++)); do
 142                                 svn_upstream=${svn_upstream#${svn_remote[$n]}}
 143                         done
 144
 145                         if [[ -z "$svn_upstream" ]]; then
 146                                 # default branch name for checkouts with no layout:
 147                                 upstream=${GIT_SVN_ID:-git-svn}
 148                         else
 149                                 upstream=${svn_upstream#/}
 150                         fi
 151                 elif [[ "svn+git" = "$upstream" ]]; then
 152                         upstream="@{upstream}"
 153                 fi
 154                 ;;
 155         esac
 156
 157         # Find how many commits we are ahead/behind our upstream
 158         if [[ -z "$legacy" ]]; then
 159                 count="$(git rev-list --count --left-right \
 160                                 "$upstream"...HEAD 2>/dev/null)"
 161         else
 162                 # produce equivalent output to --count for older versions of git
 163                 local commits
 164                 if commits="$(git rev-list --left-right "$upstream"...HEAD 2>/dev/null)"
 165                 then
 166                         local commit behind=0 ahead=0
 167                         for commit in $commits
 168                         do
 169                                 case "$commit" in
 170                                 "<"*) ((behind++)) ;;
 171                                 *)    ((ahead++))  ;;
 172                                 esac
 173                         done
 174                         count="$behind  $ahead"
 175                 else
 176                         count=""
 177                 fi
 178         fi
 179
 180         # calculate the result
 181         if [[ -z "$verbose" ]]; then
 182                 case "$count" in
 183                 "") # no upstream
 184                         p="" ;;
 185                 "0      0") # equal to upstream
 186                         p="=" ;;
 187                 "0      "*) # ahead of upstream
 188                         p=">" ;;
 189                 *"      0") # behind upstream
 190                         p="<" ;;
 191                 *)          # diverged from upstream
 192                         p="<>" ;;
 193                 esac
 194         else
 195                 case "$count" in
 196                 "") # no upstream
 197                         p="" ;;
 198                 "0      0") # equal to upstream
 199                         p=" u=" ;;
 200                 "0      "*) # ahead of upstream
 201                         p=" u+${count#0 }" ;;
 202                 *"      0") # behind upstream
 203                         p=" u-${count%  0}" ;;
 204                 *)          # diverged from upstream
 205                         p=" u+${count#* }-${count%      *}" ;;
 206                 esac
 207         fi
 208
 209 }
 210
 211 # Helper function that is meant to be called from __git_ps1.  It
 212 # injects color codes into the appropriate gitstring variables used
 213 # to build a gitstring.
 214 __git_ps1_colorize_gitstring ()
 215 {
 216         if [[ -n ${ZSH_VERSION-} ]]; then
 217                 local c_red='%F{red}'
 218                 local c_green='%F{green}'
 219                 local c_lblue='%F{blue}'
 220                 local c_clear='%f'
 221         else
 222                 # Using \[ and \] around colors is necessary to prevent
 223                 # issues with command line editing/browsing/completion!
 224                 local c_red='\[\e[31m\]'
 225                 local c_green='\[\e[32m\]'
 226                 local c_lblue='\[\e[1;34m\]'
 227                 local c_clear='\[\e[0m\]'
 228         fi
 229         local bad_color=$c_red
 230         local ok_color=$c_green
 231         local flags_color="$c_lblue"
 232
 233         local branch_color=""
 234         if [ $detached = no ]; then
 235                 branch_color="$ok_color"
 236         else
 237                 branch_color="$bad_color"
 238         fi
 239         c="$branch_color$c"
 240
 241         z="$c_clear$z"
 242         if [ "$w" = "*" ]; then
 243                 w="$bad_color$w"
 244         fi
 245         if [ -n "$i" ]; then
 246                 i="$ok_color$i"
 247         fi
 248         if [ -n "$s" ]; then
 249                 s="$flags_color$s"
 250         fi
 251         if [ -n "$u" ]; then
 252                 u="$bad_color$u"
 253         fi
 254         r="$c_clear$r"
 255 }
 256
 257 # __git_ps1 accepts 0 or 1 arguments (i.e., format string)
 258 # when called from PS1 using command substitution
 259 # in this mode it prints text to add to bash PS1 prompt (includes branch name)
 260 #
 261 # __git_ps1 requires 2 or 3 arguments when called from PROMPT_COMMAND (pc)
 262 # in that case it _sets_ PS1. The arguments are parts of a PS1 string.
 263 # when two arguments are given, the first is prepended and the second appended
 264 # to the state string when assigned to PS1.
 265 # The optional third parameter will be used as printf format string to further
 266 # customize the output of the git-status string.
 267 # In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
 268 __git_ps1 ()
 269 {
 270         local pcmode=no
 271         local detached=no
 272         local ps1pc_start='\u@\h:\w '
 273         local ps1pc_end='\$ '
 274         local printf_format=' (%s)'
 275
 276         case "$#" in
 277                 2|3)    pcmode=yes
 278                         ps1pc_start="$1"
 279                         ps1pc_end="$2"
 280                         printf_format="${3:-$printf_format}"
 281                 ;;
 282                 0|1)    printf_format="${1:-$printf_format}"
 283                 ;;
 284                 *)      return
 285                 ;;
 286         esac
 287
 288         local repo_info rev_parse_exit_code
 289         repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
 290                 --is-bare-repository --is-inside-work-tree \
 291                 --short HEAD 2>/dev/null)"
 292         rev_parse_exit_code="$?"
 293
 294         if [ -z "$repo_info" ]; then
 295                 if [ $pcmode = yes ]; then
 296                         #In PC mode PS1 always needs to be set
 297                         PS1="$ps1pc_start$ps1pc_end"
 298                 fi
 299                 return
 300         fi
 301
 302         local short_sha
 303         if [ "$rev_parse_exit_code" = "0" ]; then
 304                 short_sha="${repo_info##*$'\n'}"
 305                 repo_info="${repo_info%$'\n'*}"
 306         fi
 307         local inside_worktree="${repo_info##*$'\n'}"
 308         repo_info="${repo_info%$'\n'*}"
 309         local bare_repo="${repo_info##*$'\n'}"
 310         repo_info="${repo_info%$'\n'*}"
 311         local inside_gitdir="${repo_info##*$'\n'}"
 312         local g="${repo_info%$'\n'*}"
 313
 314         local r=""
 315         local b=""
 316         local step=""
 317         local total=""
 318         if [ -d "$g/rebase-merge" ]; then
 319                 read b 2>/dev/null <"$g/rebase-merge/head-name"
 320                 read step 2>/dev/null <"$g/rebase-merge/msgnum"
 321                 read total 2>/dev/null <"$g/rebase-merge/end"
 322                 if [ -f "$g/rebase-merge/interactive" ]; then
 323                         r="|REBASE-i"
 324                 else
 325                         r="|REBASE-m"
 326                 fi
 327         else
 328                 if [ -d "$g/rebase-apply" ]; then
 329                         read step 2>/dev/null <"$g/rebase-apply/next"
 330                         read total 2>/dev/null <"$g/rebase-apply/last"
 331                         if [ -f "$g/rebase-apply/rebasing" ]; then
 332                                 read b 2>/dev/null <"$g/rebase-apply/head-name"
 333                                 r="|REBASE"
 334                         elif [ -f "$g/rebase-apply/applying" ]; then
 335                                 r="|AM"
 336                         else
 337                                 r="|AM/REBASE"
 338                         fi
 339                 elif [ -f "$g/MERGE_HEAD" ]; then
 340                         r="|MERGING"
 341                 elif [ -f "$g/CHERRY_PICK_HEAD" ]; then
 342                         r="|CHERRY-PICKING"
 343                 elif [ -f "$g/REVERT_HEAD" ]; then
 344                         r="|REVERTING"
 345                 elif [ -f "$g/BISECT_LOG" ]; then
 346                         r="|BISECTING"
 347                 fi
 348
 349                 if [ -n "$b" ]; then
 350                         :
 351                 elif [ -h "$g/HEAD" ]; then
 352                         # symlink symbolic ref
 353                         b="$(git symbolic-ref HEAD 2>/dev/null)"
 354                 else
 355                         local head=""
 356                         if ! read head 2>/dev/null <"$g/HEAD"; then
 357                                 if [ $pcmode = yes ]; then
 358                                         PS1="$ps1pc_start$ps1pc_end"
 359                                 fi
 360                                 return
 361                         fi
 362                         # is it a symbolic ref?
 363                         b="${head#ref: }"
 364                         if [ "$head" = "$b" ]; then
 365                                 detached=yes
 366                                 b="$(
 367                                 case "${GIT_PS1_DESCRIBE_STYLE-}" in
 368                                 (contains)
 369                                         git describe --contains HEAD ;;
 370                                 (branch)
 371                                         git describe --contains --all HEAD ;;
 372                                 (describe)
 373                                         git describe HEAD ;;
 374                                 (* | default)
 375                                         git describe --tags --exact-match HEAD ;;
 376                                 esac 2>/dev/null)" ||
 377
 378                                 b="$short_sha..."
 379                                 b="($b)"
 380                         fi
 381                 fi
 382         fi
 383
 384         if [ -n "$step" ] && [ -n "$total" ]; then
 385                 r="$r $step/$total"
 386         fi
 387
 388         local w=""
 389         local i=""
 390         local s=""
 391         local u=""
 392         local c=""
 393         local p=""
 394
 395         if [ "true" = "$inside_gitdir" ]; then
 396                 if [ "true" = "$bare_repo" ]; then
 397                         c="BARE:"
 398                 else
 399                         b="GIT_DIR!"
 400                 fi
 401         elif [ "true" = "$inside_worktree" ]; then
 402                 if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
 403                    [ "$(git config --bool bash.showDirtyState)" != "false" ]
 404                 then
 405                         git diff --no-ext-diff --quiet --exit-code || w="*"
 406                         if [ -n "$short_sha" ]; then
 407                                 git diff-index --cached --quiet HEAD -- || i="+"
 408                         else
 409                                 i="#"
 410                         fi
 411                 fi
 412                 if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ] &&
 413                    [ -r "$g/refs/stash" ]; then
 414                         s="$"
 415                 fi
 416
 417                 if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ] &&
 418                    [ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
 419                    git ls-files --others --exclude-standard --error-unmatch -- '*' >/dev/null 2>/dev/null
 420                 then
 421                         u="%${ZSH_VERSION+%}"
 422                 fi
 423
 424                 if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then
 425                         __git_ps1_show_upstream
 426                 fi
 427         fi
 428
 429         local z="${GIT_PS1_STATESEPARATOR-" "}"
 430
 431         # NO color option unless in PROMPT_COMMAND mode
 432         if [ $pcmode = yes ] && [ -n "${GIT_PS1_SHOWCOLORHINTS-}" ]; then
 433                 __git_ps1_colorize_gitstring
 434         fi
 435
 436         local f="$w$i$s$u"
 437         local gitstring="$c${b##refs/heads/}${f:+$z$f}$r$p"
 438
 439         if [ $pcmode = yes ]; then
 440                 if [ "${__git_printf_supports_v-}" != yes ]; then
 441                         gitstring=$(printf -- "$printf_format" "$gitstring")
 442                 else
 443                         printf -v gitstring -- "$printf_format" "$gitstring"
 444                 fi
 445                 PS1="$ps1pc_start$gitstring$ps1pc_end"
 446         else
 447                 printf -- "$printf_format" "$gitstring"
 448         fi
 449 }