Andrew's git - gitweb.git/blob - 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 the current branch 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$(__git_ps1 " (%s)")]\$ '
  16#        ZSH:  PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
  17#        the optional argument will be used as format string.
  18#    3b) Alternatively, if you are using bash, __git_ps1 can be
  19#        used for PROMPT_COMMAND with two parameters, <pre> and
  20#        <post>, which are strings you would put in $PS1 before
  21#        and after the status string generated by the git-prompt
  22#        machinery.  e.g.
  23#        Bash: PROMPT_COMMAND='__git_ps1 "\u@\h:\w" "\\\$ "'
  24#        ZSH:  precmd () { __git_ps1 "%n" ":%~$ " "|%s" }
  25#        will show username, at-sign, host, colon, cwd, then
  26#        various status string, followed by dollar and SP, as
  27#        your prompt.
  28#        Optionally, you can supply a third argument with a printf
  29#        format string to finetune the output of the branch status
  30#
  31# The argument to __git_ps1 will be displayed only if you are currently
  32# in a git repository.  The %s token will be the name of the current
  33# branch.
  34#
  35# In addition, if you set GIT_PS1_SHOWDIRTYSTATE to a nonempty value,
  36# unstaged (*) and staged (+) changes will be shown next to the branch
  37# name.  You can configure this per-repository with the
  38# bash.showDirtyState variable, which defaults to true once
  39# GIT_PS1_SHOWDIRTYSTATE is enabled.
  40#
  41# You can also see if currently something is stashed, by setting
  42# GIT_PS1_SHOWSTASHSTATE to a nonempty value. If something is stashed,
  43# then a '$' will be shown next to the branch name.
  44#
  45# If you would like to see if there're untracked files, then you can set
  46# GIT_PS1_SHOWUNTRACKEDFILES to a nonempty value. If there're untracked
  47# files, then a '%' will be shown next to the branch name.  You can
  48# configure this per-repository with the bash.showUntrackedFiles
  49# variable, which defaults to true once GIT_PS1_SHOWUNTRACKEDFILES is
  50# enabled.
  51#
  52# If you would like to see the difference between HEAD and its upstream,
  53# set GIT_PS1_SHOWUPSTREAM="auto".  A "<" indicates you are behind, ">"
  54# indicates you are ahead, "<>" indicates you have diverged and "="
  55# indicates that there is no difference. You can further control
  56# behaviour by setting GIT_PS1_SHOWUPSTREAM to a space-separated list
  57# of values:
  58#
  59#     verbose       show number of commits ahead/behind (+/-) upstream
  60#     legacy        don't use the '--count' option available in recent
  61#                   versions of git-rev-list
  62#     git           always compare HEAD to @{upstream}
  63#     svn           always compare HEAD to your SVN upstream
  64#
  65# By default, __git_ps1 will compare HEAD to your SVN upstream if it can
  66# find one, or @{upstream} otherwise.  Once you have set
  67# GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
  68# setting the bash.showUpstream config variable.
  69#
  70# If you would like to see more information about the identity of
  71# commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE
  72# to one of these values:
  73#
  74#     contains      relative to newer annotated tag (v1.6.3.2~35)
  75#     branch        relative to newer tag or branch (master~4)
  76#     describe      relative to older annotated tag (v1.6.3.1-13-gdd42c2f)
  77#     default       exactly matching tag
  78#
  79# If you would like a colored hint about the current dirty state, set
  80# GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on
  81# the colored output of "git status -sb".
  82
  83# __gitdir accepts 0 or 1 arguments (i.e., location)
  84# returns location of .git repo
  85__gitdir ()
  86{
  87        # Note: this function is duplicated in git-completion.bash
  88        # When updating it, make sure you update the other one to match.
  89        if [ -z "${1-}" ]; then
  90                if [ -n "${__git_dir-}" ]; then
  91                        echo "$__git_dir"
  92                elif [ -n "${GIT_DIR-}" ]; then
  93                        test -d "${GIT_DIR-}" || return 1
  94                        echo "$GIT_DIR"
  95                elif [ -d .git ]; then
  96                        echo .git
  97                else
  98                        git rev-parse --git-dir 2>/dev/null
  99                fi
 100        elif [ -d "$1/.git" ]; then
 101                echo "$1/.git"
 102        else
 103                echo "$1"
 104        fi
 105}
 106
 107# stores the divergence from upstream in $p
 108# used by GIT_PS1_SHOWUPSTREAM
 109__git_ps1_show_upstream ()
 110{
 111        local key value
 112        local svn_remote svn_url_pattern count n
 113        local upstream=git legacy="" verbose=""
 114
 115        svn_remote=()
 116        # get some config options from git-config
 117        local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
 118        while read -r key value; do
 119                case "$key" in
 120                bash.showupstream)
 121                        GIT_PS1_SHOWUPSTREAM="$value"
 122                        if [[ -z "${GIT_PS1_SHOWUPSTREAM}" ]]; then
 123                                p=""
 124                                return
 125                        fi
 126                        ;;
 127                svn-remote.*.url)
 128                        svn_remote[$((${#svn_remote[@]} + 1))]="$value"
 129                        svn_url_pattern+="\\|$value"
 130                        upstream=svn+git # default upstream is SVN if available, else git
 131                        ;;
 132                esac
 133        done <<< "$output"
 134
 135        # parse configuration values
 136        for option in ${GIT_PS1_SHOWUPSTREAM}; do
 137                case "$option" in
 138                git|svn) upstream="$option" ;;
 139                verbose) verbose=1 ;;
 140                legacy)  legacy=1  ;;
 141                esac
 142        done
 143
 144        # Find our upstream
 145        case "$upstream" in
 146        git)    upstream="@{upstream}" ;;
 147        svn*)
 148                # get the upstream from the "git-svn-id: ..." in a commit message
 149                # (git-svn uses essentially the same procedure internally)
 150                local -a svn_upstream
 151                svn_upstream=($(git log --first-parent -1 \
 152                                        --grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null))
 153                if [[ 0 -ne ${#svn_upstream[@]} ]]; then
 154                        svn_upstream=${svn_upstream[${#svn_upstream[@]} - 2]}
 155                        svn_upstream=${svn_upstream%@*}
 156                        local n_stop="${#svn_remote[@]}"
 157                        for ((n=1; n <= n_stop; n++)); do
 158                                svn_upstream=${svn_upstream#${svn_remote[$n]}}
 159                        done
 160
 161                        if [[ -z "$svn_upstream" ]]; then
 162                                # default branch name for checkouts with no layout:
 163                                upstream=${GIT_SVN_ID:-git-svn}
 164                        else
 165                                upstream=${svn_upstream#/}
 166                        fi
 167                elif [[ "svn+git" = "$upstream" ]]; then
 168                        upstream="@{upstream}"
 169                fi
 170                ;;
 171        esac
 172
 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  $ahead"
 191                else
 192                        count=""
 193                fi
 194        fi
 195
 196        # calculate the result
 197        if [[ -z "$verbose" ]]; then
 198                case "$count" in
 199                "") # no upstream
 200                        p="" ;;
 201                "0      0") # equal to upstream
 202                        p="=" ;;
 203                "0      "*) # ahead of upstream
 204                        p=">" ;;
 205                *"      0") # behind upstream
 206                        p="<" ;;
 207                *)          # diverged from upstream
 208                        p="<>" ;;
 209                esac
 210        else
 211                case "$count" in
 212                "") # no upstream
 213                        p="" ;;
 214                "0      0") # equal to upstream
 215                        p=" u=" ;;
 216                "0      "*) # ahead of upstream
 217                        p=" u+${count#0 }" ;;
 218                *"      0") # behind upstream
 219                        p=" u-${count%  0}" ;;
 220                *)          # diverged from upstream
 221                        p=" u+${count#* }-${count%      *}" ;;
 222                esac
 223        fi
 224
 225}
 226
 227# Helper function that is meant to be called from __git_ps1.  It
 228# builds up a gitstring injecting color codes into the appropriate
 229# places.
 230__git_ps1_colorize_gitstring ()
 231{
 232        if [[ -n ${ZSH_VERSION-} ]]; then
 233                local c_red='%F{red}'
 234                local c_green='%F{green}'
 235                local c_lblue='%F{blue}'
 236                local c_clear='%f'
 237                local bad_color=$c_red
 238                local ok_color=$c_green
 239                local branch_color="$c_clear"
 240                local flags_color="$c_lblue"
 241                local branchstring="$c${b##refs/heads/}"
 242
 243                if [ $detached = no ]; then
 244                        branch_color="$ok_color"
 245                else
 246                        branch_color="$bad_color"
 247                fi
 248
 249                gitstring="$branch_color$branchstring$c_clear"
 250
 251                if [ -n "$w$i$s$u$r$p" ]; then
 252                        gitstring="$gitstring$z"
 253                fi
 254                if [ "$w" = "*" ]; then
 255                        gitstring="$gitstring$bad_color$w"
 256                fi
 257                if [ -n "$i" ]; then
 258                        gitstring="$gitstring$ok_color$i"
 259                fi
 260                if [ -n "$s" ]; then
 261                        gitstring="$gitstring$flags_color$s"
 262                fi
 263                if [ -n "$u" ]; then
 264                        gitstring="$gitstring$bad_color$u"
 265                fi
 266                gitstring="$gitstring$c_clear$r$p"
 267                return
 268        fi
 269        local c_red='\e[31m'
 270        local c_green='\e[32m'
 271        local c_lblue='\e[1;34m'
 272        local c_clear='\e[0m'
 273        local bad_color=$c_red
 274        local ok_color=$c_green
 275        local branch_color="$c_clear"
 276        local flags_color="$c_lblue"
 277        local branchstring="$c${b##refs/heads/}"
 278
 279        if [ $detached = no ]; then
 280                branch_color="$ok_color"
 281        else
 282                branch_color="$bad_color"
 283        fi
 284
 285        # Setting gitstring directly with \[ and \] around colors
 286        # is necessary to prevent wrapping issues!
 287        gitstring="\[$branch_color\]$branchstring\[$c_clear\]"
 288
 289        if [ -n "$w$i$s$u$r$p" ]; then
 290                gitstring="$gitstring$z"
 291        fi
 292        if [ "$w" = "*" ]; then
 293                gitstring="$gitstring\[$bad_color\]$w"
 294        fi
 295        if [ -n "$i" ]; then
 296                gitstring="$gitstring\[$ok_color\]$i"
 297        fi
 298        if [ -n "$s" ]; then
 299                gitstring="$gitstring\[$flags_color\]$s"
 300        fi
 301        if [ -n "$u" ]; then
 302                gitstring="$gitstring\[$bad_color\]$u"
 303        fi
 304        gitstring="$gitstring\[$c_clear\]$r$p"
 305}
 306
 307# __git_ps1 accepts 0 or 1 arguments (i.e., format string)
 308# when called from PS1 using command substitution
 309# in this mode it prints text to add to bash PS1 prompt (includes branch name)
 310#
 311# __git_ps1 requires 2 or 3 arguments when called from PROMPT_COMMAND (pc)
 312# in that case it _sets_ PS1. The arguments are parts of a PS1 string.
 313# when two arguments are given, the first is prepended and the second appended
 314# to the state string when assigned to PS1.
 315# The optional third parameter will be used as printf format string to further
 316# customize the output of the git-status string.
 317# In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
 318__git_ps1 ()
 319{
 320        local pcmode=no
 321        local detached=no
 322        local ps1pc_start='\u@\h:\w '
 323        local ps1pc_end='\$ '
 324        local printf_format=' (%s)'
 325
 326        case "$#" in
 327                2|3)    pcmode=yes
 328                        ps1pc_start="$1"
 329                        ps1pc_end="$2"
 330                        printf_format="${3:-$printf_format}"
 331                ;;
 332                0|1)    printf_format="${1:-$printf_format}"
 333                ;;
 334                *)      return
 335                ;;
 336        esac
 337
 338        local g="$(__gitdir)"
 339        if [ -z "$g" ]; then
 340                if [ $pcmode = yes ]; then
 341                        #In PC mode PS1 always needs to be set
 342                        PS1="$ps1pc_start$ps1pc_end"
 343                fi
 344                return
 345        fi
 346
 347        local r=""
 348        local b=""
 349        local step=""
 350        local total=""
 351        if [ -d "$g/rebase-merge" ]; then
 352                b="$(cat "$g/rebase-merge/head-name" 2>/dev/null)"
 353                step=$(cat "$g/rebase-merge/msgnum" 2>/dev/null)
 354                total=$(cat "$g/rebase-merge/end" 2>/dev/null)
 355                if [ -f "$g/rebase-merge/interactive" ]; then
 356                        r="|REBASE-i"
 357                else
 358                        r="|REBASE-m"
 359                fi
 360        else
 361                if [ -d "$g/rebase-apply" ]; then
 362                        step=$(cat "$g/rebase-apply/next" 2>/dev/null)
 363                        total=$(cat "$g/rebase-apply/last" 2>/dev/null)
 364                        if [ -f "$g/rebase-apply/rebasing" ]; then
 365                                b="$(cat "$g/rebase-apply/head-name" 2>/dev/null)"
 366                                r="|REBASE"
 367                        elif [ -f "$g/rebase-apply/applying" ]; then
 368                                r="|AM"
 369                        else
 370                                r="|AM/REBASE"
 371                        fi
 372                elif [ -f "$g/MERGE_HEAD" ]; then
 373                        r="|MERGING"
 374                elif [ -f "$g/CHERRY_PICK_HEAD" ]; then
 375                        r="|CHERRY-PICKING"
 376                elif [ -f "$g/REVERT_HEAD" ]; then
 377                        r="|REVERTING"
 378                elif [ -f "$g/BISECT_LOG" ]; then
 379                        r="|BISECTING"
 380                fi
 381
 382                test -n "$b" ||
 383                b="$(git symbolic-ref HEAD 2>/dev/null)" || {
 384                        detached=yes
 385                        b="$(
 386                        case "${GIT_PS1_DESCRIBE_STYLE-}" in
 387                        (contains)
 388                                git describe --contains HEAD ;;
 389                        (branch)
 390                                git describe --contains --all HEAD ;;
 391                        (describe)
 392                                git describe HEAD ;;
 393                        (* | default)
 394                                git describe --tags --exact-match HEAD ;;
 395                        esac 2>/dev/null)" ||
 396
 397                        b="$(git rev-parse --short HEAD 2>/dev/null)..." ||
 398                        b="unknown"
 399                        b="($b)"
 400                }
 401        fi
 402
 403        if [ -n "$step" ] && [ -n "$total" ]; then
 404                r="$r $step/$total"
 405        fi
 406
 407        local w=""
 408        local i=""
 409        local s=""
 410        local u=""
 411        local c=""
 412        local p=""
 413
 414        if [ "true" = "$(git rev-parse --is-inside-git-dir 2>/dev/null)" ]; then
 415                if [ "true" = "$(git rev-parse --is-bare-repository 2>/dev/null)" ]; then
 416                        c="BARE:"
 417                else
 418                        b="GIT_DIR!"
 419                fi
 420        elif [ "true" = "$(git rev-parse --is-inside-work-tree 2>/dev/null)" ]; then
 421                if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
 422                   [ "$(git config --bool bash.showDirtyState)" != "false" ]
 423                then
 424                        git diff --no-ext-diff --quiet --exit-code || w="*"
 425                        if git rev-parse --quiet --verify HEAD >/dev/null; then
 426                                git diff-index --cached --quiet HEAD -- || i="+"
 427                        else
 428                                i="#"
 429                        fi
 430                fi
 431                if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ]; then
 432                        git rev-parse --verify refs/stash >/dev/null 2>&1 && s="$"
 433                fi
 434
 435                if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ] &&
 436                   [ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
 437                   [ -n "$(git ls-files --others --exclude-standard)" ]
 438                then
 439                        u="%${ZSH_VERSION+%}"
 440                fi
 441
 442                if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then
 443                        __git_ps1_show_upstream
 444                fi
 445        fi
 446
 447        local z="${GIT_PS1_STATESEPARATOR-" "}"
 448        local f="$w$i$s$u"
 449        if [ $pcmode = yes ]; then
 450                local gitstring=
 451                if [ -n "${GIT_PS1_SHOWCOLORHINTS-}" ]; then
 452                        __git_ps1_colorize_gitstring
 453                else
 454                        gitstring="$c${b##refs/heads/}${f:+$z$f}$r$p"
 455                fi
 456                gitstring=$(printf -- "$printf_format" "$gitstring")
 457                PS1="$ps1pc_start$gitstring$ps1pc_end"
 458        else
 459                # NO color option unless in PROMPT_COMMAND mode
 460                printf -- "$printf_format" "$c${b##refs/heads/}${f:+$z$f}$r$p"
 461        fi
 462}