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, but some shells (e.g. FreeBSD 7.2) are buggy and
  16# do not equate an unset IFS with IFS with the default, so here is
  17# an explicit SP HT LF.
  18IFS='   
  19'
  20
  21git_broken_path_fix () {
  22        case ":$PATH:" in
  23        *:$1:*) : ok ;;
  24        *)
  25                PATH=$(
  26                        SANE_TOOL_PATH="$1"
  27                        IFS=: path= sep=
  28                        set x $PATH
  29                        shift
  30                        for elem
  31                        do
  32                                case "$SANE_TOOL_PATH:$elem" in
  33                                (?*:/bin | ?*:/usr/bin)
  34                                        path="$path$sep$SANE_TOOL_PATH"
  35                                        sep=:
  36                                        SANE_TOOL_PATH=
  37                                esac
  38                                path="$path$sep$elem"
  39                                sep=:
  40                        done
  41                        echo "$path"
  42                )
  43                ;;
  44        esac
  45}
  46
  47# @@BROKEN_PATH_FIX@@
  48
  49die () {
  50        die_with_status 1 "$@"
  51}
  52
  53die_with_status () {
  54        status=$1
  55        shift
  56        echo >&2 "$*"
  57        exit "$status"
  58}
  59
  60GIT_QUIET=
  61
  62say () {
  63        if test -z "$GIT_QUIET"
  64        then
  65                printf '%s\n' "$*"
  66        fi
  67}
  68
  69if test -n "$OPTIONS_SPEC"; then
  70        usage() {
  71                "$0" -h
  72                exit 1
  73        }
  74
  75        parseopt_extra=
  76        [ -n "$OPTIONS_KEEPDASHDASH" ] &&
  77                parseopt_extra="--keep-dashdash"
  78
  79        eval "$(
  80                echo "$OPTIONS_SPEC" |
  81                        git rev-parse --parseopt $parseopt_extra -- "$@" ||
  82                echo exit $?
  83        )"
  84else
  85        dashless=$(basename "$0" | sed -e 's/-/ /')
  86        usage() {
  87                die "Usage: $dashless $USAGE"
  88        }
  89
  90        if [ -z "$LONG_USAGE" ]
  91        then
  92                LONG_USAGE="Usage: $dashless $USAGE"
  93        else
  94                LONG_USAGE="Usage: $dashless $USAGE
  95
  96$LONG_USAGE"
  97        fi
  98
  99        case "$1" in
 100                -h)
 101                echo "$LONG_USAGE"
 102                exit
 103        esac
 104fi
 105
 106set_reflog_action() {
 107        if [ -z "${GIT_REFLOG_ACTION:+set}" ]
 108        then
 109                GIT_REFLOG_ACTION="$*"
 110                export GIT_REFLOG_ACTION
 111        fi
 112}
 113
 114git_editor() {
 115        if test -z "${GIT_EDITOR:+set}"
 116        then
 117                GIT_EDITOR="$(git var GIT_EDITOR)" || return $?
 118        fi
 119
 120        eval "$GIT_EDITOR" '"$@"'
 121}
 122
 123git_pager() {
 124        if test -t 1
 125        then
 126                GIT_PAGER=$(git var GIT_PAGER)
 127        else
 128                GIT_PAGER=cat
 129        fi
 130        : ${LESS=-FRSX}
 131        export LESS
 132
 133        eval "$GIT_PAGER" '"$@"'
 134}
 135
 136sane_grep () {
 137        GREP_OPTIONS= LC_ALL=C grep "$@"
 138}
 139
 140sane_egrep () {
 141        GREP_OPTIONS= LC_ALL=C egrep "$@"
 142}
 143
 144is_bare_repository () {
 145        git rev-parse --is-bare-repository
 146}
 147
 148cd_to_toplevel () {
 149        cdup=$(git rev-parse --show-toplevel) &&
 150        cd "$cdup" || {
 151                echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
 152                exit 1
 153        }
 154}
 155
 156require_work_tree_exists () {
 157        if test "z$(git rev-parse --is-bare-repository)" != zfalse
 158        then
 159                die "fatal: $0 cannot be used without a working tree."
 160        fi
 161}
 162
 163require_work_tree () {
 164        test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
 165        die "fatal: $0 cannot be used without a working tree."
 166}
 167
 168require_clean_work_tree () {
 169        git rev-parse --verify HEAD >/dev/null || exit 1
 170        git update-index -q --ignore-submodules --refresh
 171        err=0
 172
 173        if ! git diff-files --quiet --ignore-submodules
 174        then
 175                echo >&2 "Cannot $1: You have unstaged changes."
 176                err=1
 177        fi
 178
 179        if ! git diff-index --cached --quiet --ignore-submodules HEAD --
 180        then
 181                if [ $err = 0 ]
 182                then
 183                    echo >&2 "Cannot $1: Your index contains uncommitted changes."
 184                else
 185                    echo >&2 "Additionally, your index contains uncommitted changes."
 186                fi
 187                err=1
 188        fi
 189
 190        if [ $err = 1 ]
 191        then
 192                test -n "$2" && echo >&2 "$2"
 193                exit 1
 194        fi
 195}
 196
 197get_author_ident_from_commit () {
 198        pick_author_script='
 199        /^author /{
 200                s/'\''/'\''\\'\'\''/g
 201                h
 202                s/^author \([^<]*\) <[^>]*> .*$/\1/
 203                s/.*/GIT_AUTHOR_NAME='\''&'\''/p
 204
 205                g
 206                s/^author [^<]* <\([^>]*\)> .*$/\1/
 207                s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
 208
 209                g
 210                s/^author [^<]* <[^>]*> \(.*\)$/@\1/
 211                s/.*/GIT_AUTHOR_DATE='\''&'\''/p
 212
 213                q
 214        }
 215        '
 216        encoding=$(git config i18n.commitencoding || echo UTF-8)
 217        git show -s --pretty=raw --encoding="$encoding" "$1" -- |
 218        LANG=C LC_ALL=C sed -ne "$pick_author_script"
 219}
 220
 221# Clear repo-local GIT_* environment variables. Useful when switching to
 222# another repository (e.g. when entering a submodule). See also the env
 223# list in git_connect()
 224clear_local_git_env() {
 225        unset $(git rev-parse --local-env-vars)
 226}
 227
 228
 229# Platform specific tweaks to work around some commands
 230case $(uname -s) in
 231*MINGW*)
 232        # Windows has its own (incompatible) sort and find
 233        sort () {
 234                /usr/bin/sort "$@"
 235        }
 236        find () {
 237                /usr/bin/find "$@"
 238        }
 239        # git sees Windows-style pwd
 240        pwd () {
 241                builtin pwd -W
 242        }
 243        is_absolute_path () {
 244                case "$1" in
 245                [/\\]* | [A-Za-z]:*)
 246                        return 0 ;;
 247                esac
 248                return 1
 249        }
 250        ;;
 251*)
 252        is_absolute_path () {
 253                case "$1" in
 254                /*)
 255                        return 0 ;;
 256                esac
 257                return 1
 258        }
 259esac
 260
 261# Make sure we are in a valid repository of a vintage we understand,
 262# if we require to be in a git repository.
 263if test -z "$NONGIT_OK"
 264then
 265        GIT_DIR=$(git rev-parse --git-dir) || exit
 266        if [ -z "$SUBDIRECTORY_OK" ]
 267        then
 268                test -z "$(git rev-parse --show-cdup)" || {
 269                        exit=$?
 270                        echo >&2 "You need to run this command from the toplevel of the working tree."
 271                        exit $exit
 272                }
 273        fi
 274        test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
 275                echo >&2 "Unable to determine absolute path of git directory"
 276                exit 1
 277        }
 278        : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
 279fi