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                 printf '%s\n' "$*"
  63         fi
  64 }
  65
  66 if test -n "$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 $?
  80         )"
  81 else
  82         dashless=$(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
 101 fi
 102
 103 set_reflog_action() {
 104         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
 105         then
 106                 GIT_REFLOG_ACTION="$*"
 107                 export GIT_REFLOG_ACTION
 108         fi
 109 }
 110
 111 git_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" '"$@"'
 118 }
 119
 120 git_pager() {
 121         if test -t 1
 122         then
 123                 GIT_PAGER=$(git var GIT_PAGER)
 124         else
 125                 GIT_PAGER=cat
 126         fi
 127         : ${LESS=-FRSX}
 128         export LESS
 129
 130         eval "$GIT_PAGER" '"$@"'
 131 }
 132
 133 sane_grep () {
 134         GREP_OPTIONS= LC_ALL=C grep "$@"
 135 }
 136
 137 sane_egrep () {
 138         GREP_OPTIONS= LC_ALL=C egrep "$@"
 139 }
 140
 141 is_bare_repository () {
 142         git rev-parse --is-bare-repository
 143 }
 144
 145 cd_to_toplevel () {
 146         cdup=$(git rev-parse --show-toplevel) &&
 147         cd "$cdup" || {
 148                 echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
 149                 exit 1
 150         }
 151 }
 152
 153 require_work_tree_exists () {
 154         if test "z$(git rev-parse --is-bare-repository)" != zfalse
 155         then
 156                 die "fatal: $0 cannot be used without a working tree."
 157         fi
 158 }
 159
 160 require_work_tree () {
 161         test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
 162         die "fatal: $0 cannot be used without a working tree."
 163 }
 164
 165 require_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.
 203 pick_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 '/^$/q'
 226 }
 227
 228 # Create a pick-script as above and feed it to sed. Stdout is suitable for
 229 # feeding to eval.
 230 parse_ident_from_commit () {
 231         LANG=C LC_ALL=C sed -ne "$(pick_ident_script "$@")"
 232 }
 233
 234 # Parse the author from a commit given as an argument. Stdout is suitable for
 235 # feeding to eval to set the usual GIT_* ident variables.
 236 get_author_ident_from_commit () {
 237         encoding=$(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()
 245 clear_local_git_env() {
 246         unset $(git rev-parse --local-env-vars)
 247 }
 248
 249
 250 # Platform specific tweaks to work around some commands
 251 case $(uname -s) in
 252 *MINGW*)
 253         # Windows has its own (incompatible) sort and find
 254         sort () {
 255                 /usr/bin/sort "$@"
 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 "$1" in
 275                 /*)
 276                         return 0 ;;
 277                 esac
 278                 return 1
 279         }
 280 esac
 281
 282 # Make sure we are in a valid repository of a vintage we understand,
 283 # if we require to be in a git repository.
 284 if test -z "$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