Andrew's git - gitweb.git/blob

   1#!/bin/sh
   2#
   3# This is included in commands that either have to be run from the toplevel
   4# of the repository, or with GIT_DIR environment variable properly.
   5# If the GIT_DIR does not look like the right correct git-repository,
   6# it dies.
   7
   8# Having this variable in your environment would break scripts because
   9# you would cause "cd" to be taken to unexpected places.  If you
  10# like CDPATH, define it for your interactive shell sessions without
  11# exporting it.
  12# But we protect ourselves from such a user mistake nevertheless.
  13unset CDPATH
  14
  15# Similarly for IFS
  16unset IFS
  17
  18git_broken_path_fix () {
  19        case ":$PATH:" in
  20        *:$1:*) : ok ;;
  21        *)
  22                PATH=$(
  23                        SANE_TOOL_PATH="$1"
  24                        IFS=: path= sep=
  25                        set x $PATH
  26                        shift
  27                        for elem
  28                        do
  29                                case "$SANE_TOOL_PATH:$elem" in
  30                                (?*:/bin | ?*:/usr/bin)
  31                                        path="$path$sep$SANE_TOOL_PATH"
  32                                        sep=:
  33                                        SANE_TOOL_PATH=
  34                                esac
  35                                path="$path$sep$elem"
  36                                sep=:
  37                        done
  38                        echo "$path"
  39                )
  40                ;;
  41        esac
  42}
  43
  44# @@BROKEN_PATH_FIX@@
  45
  46die () {
  47        die_with_status 1 "$@"
  48}
  49
  50die_with_status () {
  51        status=$1
  52        shift
  53        echo >&2 "$*"
  54        exit "$status"
  55}
  56
  57GIT_QUIET=
  58
  59say () {
  60        if test -z "$GIT_QUIET"
  61        then
  62                printf '%s\n' "$*"
  63        fi
  64}
  65
  66if test -n "$OPTIONS_SPEC"; then
  67        usage() {
  68                "$0" -h
  69                exit 1
  70        }
  71
  72        parseopt_extra=
  73        [ -n "$OPTIONS_KEEPDASHDASH" ] &&
  74                parseopt_extra="--keep-dashdash"
  75
  76        eval "$(
  77                echo "$OPTIONS_SPEC" |
  78                        git rev-parse --parseopt $parseopt_extra -- "$@" ||
  79                echo exit $?
  80        )"
  81else
  82        dashless=$(basename "$0" | sed -e 's/-/ /')
  83        usage() {
  84                die "Usage: $dashless $USAGE"
  85        }
  86
  87        if [ -z "$LONG_USAGE" ]
  88        then
  89                LONG_USAGE="Usage: $dashless $USAGE"
  90        else
  91                LONG_USAGE="Usage: $dashless $USAGE
  92
  93$LONG_USAGE"
  94        fi
  95
  96        case "$1" in
  97                -h)
  98                echo "$LONG_USAGE"
  99                exit
 100        esac
 101fi
 102
 103set_reflog_action() {
 104        if [ -z "${GIT_REFLOG_ACTION:+set}" ]
 105        then
 106                GIT_REFLOG_ACTION="$*"
 107                export GIT_REFLOG_ACTION
 108        fi
 109}
 110
 111git_editor() {
 112        if test -z "${GIT_EDITOR:+set}"
 113        then
 114                GIT_EDITOR="$(git var GIT_EDITOR)" || return $?
 115        fi
 116
 117        eval "$GIT_EDITOR" '"$@"'
 118}
 119
 120git_pager() {
 121        if test -t 1
 122        then
 123                GIT_PAGER=$(git var GIT_PAGER)
 124        else
 125                GIT_PAGER=cat
 126        fi
 127        : ${LESS=-FRSX}
 128        export LESS
 129
 130        eval "$GIT_PAGER" '"$@"'
 131}
 132
 133sane_grep () {
 134        GREP_OPTIONS= LC_ALL=C grep "$@"
 135}
 136
 137sane_egrep () {
 138        GREP_OPTIONS= LC_ALL=C egrep "$@"
 139}
 140
 141is_bare_repository () {
 142        git rev-parse --is-bare-repository
 143}
 144
 145cd_to_toplevel () {
 146        cdup=$(git rev-parse --show-toplevel) &&
 147        cd "$cdup" || {
 148                echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
 149                exit 1
 150        }
 151}
 152
 153require_work_tree_exists () {
 154        if test "z$(git rev-parse --is-bare-repository)" != zfalse
 155        then
 156                die "fatal: $0 cannot be used without a working tree."
 157        fi
 158}
 159
 160require_work_tree () {
 161        test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
 162        die "fatal: $0 cannot be used without a working tree."
 163}
 164
 165require_clean_work_tree () {
 166        git rev-parse --verify HEAD >/dev/null || exit 1
 167        git update-index -q --ignore-submodules --refresh
 168        err=0
 169
 170        if ! git diff-files --quiet --ignore-submodules
 171        then
 172                echo >&2 "Cannot $1: You have unstaged changes."
 173                err=1
 174        fi
 175
 176        if ! git diff-index --cached --quiet --ignore-submodules HEAD --
 177        then
 178                if [ $err = 0 ]
 179                then
 180                    echo >&2 "Cannot $1: Your index contains uncommitted changes."
 181                else
 182                    echo >&2 "Additionally, your index contains uncommitted changes."
 183                fi
 184                err=1
 185        fi
 186
 187        if [ $err = 1 ]
 188        then
 189                test -n "$2" && echo >&2 "$2"
 190                exit 1
 191        fi
 192}
 193
 194# Generate a sed script to parse identities from a commit.
 195#
 196# Reads the commit from stdin, which should be in raw format (e.g., from
 197# cat-file or "--pretty=raw").
 198#
 199# The first argument specifies the ident line to parse (e.g., "author"), and
 200# the second specifies the environment variable to put it in (e.g., "AUTHOR"
 201# for "GIT_AUTHOR_*"). Multiple pairs can be given to parse author and
 202# committer.
 203pick_ident_script () {
 204        while test $# -gt 0
 205        do
 206                lid=$1; shift
 207                uid=$1; shift
 208                printf '%s' "
 209                /^$lid /{
 210                        s/'/'\\\\''/g
 211                        h
 212                        s/^$lid "'\([^<]*\) <[^>]*> .*$/\1/'"
 213                        s/.*/GIT_${uid}_NAME='&'/p
 214
 215                        g
 216                        s/^$lid "'[^<]* <\([^>]*\)> .*$/\1/'"
 217                        s/.*/GIT_${uid}_EMAIL='&'/p
 218
 219                        g
 220                        s/^$lid "'[^<]* <[^>]*> \(.*\)$/@\1/'"
 221                        s/.*/GIT_${uid}_DATE='&'/p
 222                }
 223                "
 224        done
 225        echo '/^$/q'
 226}
 227
 228# Create a pick-script as above and feed it to sed. Stdout is suitable for
 229# feeding to eval.
 230parse_ident_from_commit () {
 231        LANG=C LC_ALL=C sed -ne "$(pick_ident_script "$@")"
 232}
 233
 234# Parse the author from a commit given as an argument. Stdout is suitable for
 235# feeding to eval to set the usual GIT_* ident variables.
 236get_author_ident_from_commit () {
 237        encoding=$(git config i18n.commitencoding || echo UTF-8)
 238        git show -s --pretty=raw --encoding="$encoding" "$1" -- |
 239        parse_ident_from_commit author AUTHOR
 240}
 241
 242# Clear repo-local GIT_* environment variables. Useful when switching to
 243# another repository (e.g. when entering a submodule). See also the env
 244# list in git_connect()
 245clear_local_git_env() {
 246        unset $(git rev-parse --local-env-vars)
 247}
 248
 249
 250# Platform specific tweaks to work around some commands
 251case $(uname -s) in
 252*MINGW*)
 253        # Windows has its own (incompatible) sort and find
 254        sort () {
 255                /usr/bin/sort "$@"
 256        }
 257        find () {
 258                /usr/bin/find "$@"
 259        }
 260        # git sees Windows-style pwd
 261        pwd () {
 262                builtin pwd -W
 263        }
 264        is_absolute_path () {
 265                case "$1" in
 266                [/\\]* | [A-Za-z]:*)
 267                        return 0 ;;
 268                esac
 269                return 1
 270        }
 271        ;;
 272*)
 273        is_absolute_path () {
 274                case "$1" in
 275                /*)
 276                        return 0 ;;
 277                esac
 278                return 1
 279        }
 280esac
 281
 282# Make sure we are in a valid repository of a vintage we understand,
 283# if we require to be in a git repository.
 284if test -z "$NONGIT_OK"
 285then
 286        GIT_DIR=$(git rev-parse --git-dir) || exit
 287        if [ -z "$SUBDIRECTORY_OK" ]
 288        then
 289                test -z "$(git rev-parse --show-cdup)" || {
 290                        exit=$?
 291                        echo >&2 "You need to run this command from the toplevel of the working tree."
 292                        exit $exit
 293                }
 294        fi
 295        test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
 296                echo >&2 "Unable to determine absolute path of git directory"
 297                exit 1
 298        }
 299        : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
 300fi