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
 197# Generate a sed script to parse identities from a commit.
 198#
 199# Reads the commit from stdin, which should be in raw format (e.g., from
 200# cat-file or "--pretty=raw").
 201#
 202# The first argument specifies the ident line to parse (e.g., "author"), and
 203# the second specifies the environment variable to put it in (e.g., "AUTHOR"
 204# for "GIT_AUTHOR_*"). Multiple pairs can be given to parse author and
 205# committer.
 206pick_ident_script () {
 207        while test $# -gt 0
 208        do
 209                lid=$1; shift
 210                uid=$1; shift
 211                printf '%s' "
 212                /^$lid /{
 213                        s/'/'\\\\''/g
 214                        h
 215                        s/^$lid "'\([^<]*\) <[^>]*> .*$/\1/'"
 216                        s/.*/GIT_${uid}_NAME='&'/p
 217
 218                        g
 219                        s/^$lid "'[^<]* <\([^>]*\)> .*$/\1/'"
 220                        s/.*/GIT_${uid}_EMAIL='&'/p
 221
 222                        g
 223                        s/^$lid "'[^<]* <[^>]*> \(.*\)$/@\1/'"
 224                        s/.*/GIT_${uid}_DATE='&'/p
 225                }
 226                "
 227        done
 228        echo '/^$/q'
 229}
 230
 231# Create a pick-script as above and feed it to sed. Stdout is suitable for
 232# feeding to eval.
 233parse_ident_from_commit () {
 234        LANG=C LC_ALL=C sed -ne "$(pick_ident_script "$@")"
 235}
 236
 237# Parse the author from a commit given as an argument. Stdout is suitable for
 238# feeding to eval to set the usual GIT_* ident variables.
 239get_author_ident_from_commit () {
 240        encoding=$(git config i18n.commitencoding || echo UTF-8)
 241        git show -s --pretty=raw --encoding="$encoding" "$1" -- |
 242        parse_ident_from_commit author AUTHOR
 243}
 244
 245# Clear repo-local GIT_* environment variables. Useful when switching to
 246# another repository (e.g. when entering a submodule). See also the env
 247# list in git_connect()
 248clear_local_git_env() {
 249        unset $(git rev-parse --local-env-vars)
 250}
 251
 252# Generate a virtual base file for a two-file merge. Uses git apply to
 253# remove lines from $1 that are not in $2, leaving only common lines.
 254create_virtual_base() {
 255        sz0=$(wc -c <"$1")
 256        @@DIFF@@ -u -La/"$1" -Lb/"$1" "$1" "$2" | git apply --no-add
 257        sz1=$(wc -c <"$1")
 258
 259        # If we do not have enough common material, it is not
 260        # worth trying two-file merge using common subsections.
 261        expr $sz0 \< $sz1 \* 2 >/dev/null || : >"$1"
 262}
 263
 264
 265# Platform specific tweaks to work around some commands
 266case $(uname -s) in
 267*MINGW*)
 268        # Windows has its own (incompatible) sort and find
 269        sort () {
 270                /usr/bin/sort "$@"
 271        }
 272        find () {
 273                /usr/bin/find "$@"
 274        }
 275        # git sees Windows-style pwd
 276        pwd () {
 277                builtin pwd -W
 278        }
 279        is_absolute_path () {
 280                case "$1" in
 281                [/\\]* | [A-Za-z]:*)
 282                        return 0 ;;
 283                esac
 284                return 1
 285        }
 286        ;;
 287*)
 288        is_absolute_path () {
 289                case "$1" in
 290                /*)
 291                        return 0 ;;
 292                esac
 293                return 1
 294        }
 295esac
 296
 297# Make sure we are in a valid repository of a vintage we understand,
 298# if we require to be in a git repository.
 299if test -z "$NONGIT_OK"
 300then
 301        GIT_DIR=$(git rev-parse --git-dir) || exit
 302        if [ -z "$SUBDIRECTORY_OK" ]
 303        then
 304                test -z "$(git rev-parse --show-cdup)" || {
 305                        exit=$?
 306                        echo >&2 "You need to run this command from the toplevel of the working tree."
 307                        exit $exit
 308                }
 309        fi
 310        test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
 311                echo >&2 "Unable to determine absolute path of git directory"
 312                exit 1
 313        }
 314        : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
 315fi