git-sh-setup.sh

   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.
  13 unset CDPATH
  14
  15 # Similarly for IFS
  16 unset IFS
  17
  18 git_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
  46 die () {
  47         die_with_status 1 "$@"
  48 }
  49
  50 die_with_status () {
  51         status=$1
  52         shift
  53         echo >&2 "$*"
  54         exit "$status"
  55 }
  56
  57 GIT_QUIET=
  58
  59 say () {
  60         if test -z "$GIT_QUIET"
  61         then
  62                 cat <<EOF
  63 $*
  64 EOF
  65         fi
  66 }
  67
  68 if test -n "$OPTIONS_SPEC"; then
  69         usage() {
  70                 "$0" -h
  71                 exit 1
  72         }
  73
  74         parseopt_extra=
  75         [ -n "$OPTIONS_KEEPDASHDASH" ] &&
  76                 parseopt_extra="--keep-dashdash"
  77
  78         eval "$(
  79                 echo "$OPTIONS_SPEC" |
  80                         git rev-parse --parseopt $parseopt_extra -- "$@" ||
  81                 echo exit $?
  82         )"
  83 else
  84         dashless=$(basename "$0" | sed -e 's/-/ /')
  85         usage() {
  86                 die "Usage: $dashless $USAGE"
  87         }
  88
  89         if [ -z "$LONG_USAGE" ]
  90         then
  91                 LONG_USAGE="Usage: $dashless $USAGE"
  92         else
  93                 LONG_USAGE="Usage: $dashless $USAGE
  94
  95 $LONG_USAGE"
  96         fi
  97
  98         case "$1" in
  99                 -h)
 100                 echo "$LONG_USAGE"
 101                 exit
 102         esac
 103 fi
 104
 105 set_reflog_action() {
 106         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
 107         then
 108                 GIT_REFLOG_ACTION="$*"
 109                 export GIT_REFLOG_ACTION
 110         fi
 111 }
 112
 113 git_editor() {
 114         if test -z "${GIT_EDITOR:+set}"
 115         then
 116                 GIT_EDITOR="$(git var GIT_EDITOR)" || return $?
 117         fi
 118
 119         eval "$GIT_EDITOR" '"$@"'
 120 }
 121
 122 git_pager() {
 123         if test -t 1
 124         then
 125                 GIT_PAGER=$(git var GIT_PAGER)
 126         else
 127                 GIT_PAGER=cat
 128         fi
 129         : ${LESS=-FRSX}
 130         export LESS
 131
 132         eval "$GIT_PAGER" '"$@"'
 133 }
 134
 135 sane_grep () {
 136         GREP_OPTIONS= LC_ALL=C grep "$@"
 137 }
 138
 139 sane_egrep () {
 140         GREP_OPTIONS= LC_ALL=C egrep "$@"
 141 }
 142
 143 is_bare_repository () {
 144         git rev-parse --is-bare-repository
 145 }
 146
 147 cd_to_toplevel () {
 148         cdup=$(git rev-parse --show-toplevel) &&
 149         cd "$cdup" || {
 150                 echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
 151                 exit 1
 152         }
 153 }
 154
 155 require_work_tree_exists () {
 156         if test "z$(git rev-parse --is-bare-repository)" != zfalse
 157         then
 158                 die "fatal: $0 cannot be used without a working tree."
 159         fi
 160 }
 161
 162 require_work_tree () {
 163         test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
 164         die "fatal: $0 cannot be used without a working tree."
 165 }
 166
 167 require_clean_work_tree () {
 168         git rev-parse --verify HEAD >/dev/null || exit 1
 169         git update-index -q --ignore-submodules --refresh
 170         err=0
 171
 172         if ! git diff-files --quiet --ignore-submodules
 173         then
 174                 echo >&2 "Cannot $1: You have unstaged changes."
 175                 err=1
 176         fi
 177
 178         if ! git diff-index --cached --quiet --ignore-submodules HEAD --
 179         then
 180                 if [ $err = 0 ]
 181                 then
 182                     echo >&2 "Cannot $1: Your index contains uncommitted changes."
 183                 else
 184                     echo >&2 "Additionally, your index contains uncommitted changes."
 185                 fi
 186                 err=1
 187         fi
 188
 189         if [ $err = 1 ]
 190         then
 191                 test -n "$2" && echo >&2 "$2"
 192                 exit 1
 193         fi
 194 }
 195
 196 # Generate a sed script to parse identities from a commit.
 197 #
 198 # Reads the commit from stdin, which should be in raw format (e.g., from
 199 # cat-file or "--pretty=raw").
 200 #
 201 # The first argument specifies the ident line to parse (e.g., "author"), and
 202 # the second specifies the environment variable to put it in (e.g., "AUTHOR"
 203 # for "GIT_AUTHOR_*"). Multiple pairs can be given to parse author and
 204 # committer.
 205 pick_ident_script () {
 206         while test $# -gt 0
 207         do
 208                 lid=$1; shift
 209                 uid=$1; shift
 210                 printf '%s' "
 211                 /^$lid /{
 212                         s/'/'\\\\''/g
 213                         h
 214                         s/^$lid "'\([^<]*\) <[^>]*> .*$/\1/'"
 215                         s/.*/GIT_${uid}_NAME='&'/p
 216
 217                         g
 218                         s/^$lid "'[^<]* <\([^>]*\)> .*$/\1/'"
 219                         s/.*/GIT_${uid}_EMAIL='&'/p
 220
 221                         g
 222                         s/^$lid "'[^<]* <[^>]*> \(.*\)$/@\1/'"
 223                         s/.*/GIT_${uid}_DATE='&'/p
 224                 }
 225                 "
 226         done
 227         echo '/^$/q'
 228 }
 229
 230 # Create a pick-script as above and feed it to sed. Stdout is suitable for
 231 # feeding to eval.
 232 parse_ident_from_commit () {
 233         LANG=C LC_ALL=C sed -ne "$(pick_ident_script "$@")"
 234 }
 235
 236 # Parse the author from a commit given as an argument. Stdout is suitable for
 237 # feeding to eval to set the usual GIT_* ident variables.
 238 get_author_ident_from_commit () {
 239         encoding=$(git config i18n.commitencoding || echo UTF-8)
 240         git show -s --pretty=raw --encoding="$encoding" "$1" -- |
 241         parse_ident_from_commit author AUTHOR
 242 }
 243
 244 # Clear repo-local GIT_* environment variables. Useful when switching to
 245 # another repository (e.g. when entering a submodule). See also the env
 246 # list in git_connect()
 247 clear_local_git_env() {
 248         unset $(git rev-parse --local-env-vars)
 249 }
 250
 251
 252 # Platform specific tweaks to work around some commands
 253 case $(uname -s) in
 254 *MINGW*)
 255         # Windows has its own (incompatible) sort and find
 256         sort () {
 257                 /usr/bin/sort "$@"
 258         }
 259         find () {
 260                 /usr/bin/find "$@"
 261         }
 262         # Let pwd always return the uniqe real windows path
 263         alias pwd='pwd -W'
 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 "$1" in
 275                 /*)
 276                         return 0 ;;
 277                 esac
 278                 return 1
 279         }
 280 esac
 281
 282 # Make sure we are in a valid repository of a vintage we understand,
 283 # if we require to be in a git repository.
 284 if test -z "$NONGIT_OK"
 285 then
 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"}
 300 fi