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 unset CDPATH
  13
  14 git_broken_path_fix () {
  15         case ":$PATH:" in
  16         *:$1:*) : ok ;;
  17         *)
  18                 PATH=$(
  19                         SANE_TOOL_PATH="$1"
  20                         IFS=: path= sep=
  21                         set x $PATH
  22                         shift
  23                         for elem
  24                         do
  25                                 case "$SANE_TOOL_PATH:$elem" in
  26                                 (?*:/bin | ?*:/usr/bin)
  27                                         path="$path$sep$SANE_TOOL_PATH"
  28                                         sep=:
  29                                         SANE_TOOL_PATH=
  30                                 esac
  31                                 path="$path$sep$elem"
  32                                 sep=:
  33                         done
  34                         echo "$path"
  35                 )
  36                 ;;
  37         esac
  38 }
  39
  40 # @@BROKEN_PATH_FIX@@
  41
  42 die () {
  43         die_with_status 1 "$@"
  44 }
  45
  46 die_with_status () {
  47         status=$1
  48         shift
  49         echo >&2 "$*"
  50         exit "$status"
  51 }
  52
  53 GIT_QUIET=
  54
  55 say () {
  56         if test -z "$GIT_QUIET"
  57         then
  58                 cat <<EOF
  59 $*
  60 EOF
  61         fi
  62 }
  63
  64 if test -n "$OPTIONS_SPEC"; then
  65         usage() {
  66                 "$0" -h
  67                 exit 1
  68         }
  69
  70         parseopt_extra=
  71         [ -n "$OPTIONS_KEEPDASHDASH" ] &&
  72                 parseopt_extra="--keep-dashdash"
  73
  74         eval "$(
  75                 echo "$OPTIONS_SPEC" |
  76                         git rev-parse --parseopt $parseopt_extra -- "$@" ||
  77                 echo exit $?
  78         )"
  79 else
  80         dashless=$(basename "$0" | sed -e 's/-/ /')
  81         usage() {
  82                 die "Usage: $dashless $USAGE"
  83         }
  84
  85         if [ -z "$LONG_USAGE" ]
  86         then
  87                 LONG_USAGE="Usage: $dashless $USAGE"
  88         else
  89                 LONG_USAGE="Usage: $dashless $USAGE
  90
  91 $LONG_USAGE"
  92         fi
  93
  94         case "$1" in
  95                 -h)
  96                 echo "$LONG_USAGE"
  97                 exit
  98         esac
  99 fi
 100
 101 set_reflog_action() {
 102         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
 103         then
 104                 GIT_REFLOG_ACTION="$*"
 105                 export GIT_REFLOG_ACTION
 106         fi
 107 }
 108
 109 git_editor() {
 110         if test -z "${GIT_EDITOR:+set}"
 111         then
 112                 GIT_EDITOR="$(git var GIT_EDITOR)" || return $?
 113         fi
 114
 115         eval "$GIT_EDITOR" '"$@"'
 116 }
 117
 118 git_pager() {
 119         if test -t 1
 120         then
 121                 GIT_PAGER=$(git var GIT_PAGER)
 122         else
 123                 GIT_PAGER=cat
 124         fi
 125         : ${LESS=-FRSX}
 126         export LESS
 127
 128         eval "$GIT_PAGER" '"$@"'
 129 }
 130
 131 sane_grep () {
 132         GREP_OPTIONS= LC_ALL=C grep "$@"
 133 }
 134
 135 sane_egrep () {
 136         GREP_OPTIONS= LC_ALL=C egrep "$@"
 137 }
 138
 139 is_bare_repository () {
 140         git rev-parse --is-bare-repository
 141 }
 142
 143 cd_to_toplevel () {
 144         cdup=$(git rev-parse --show-toplevel) &&
 145         cd "$cdup" || {
 146                 echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
 147                 exit 1
 148         }
 149 }
 150
 151 require_work_tree_exists () {
 152         if test "z$(git rev-parse --is-bare-repository)" != zfalse
 153         then
 154                 die "fatal: $0 cannot be used without a working tree."
 155         fi
 156 }
 157
 158 require_work_tree () {
 159         test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
 160         die "fatal: $0 cannot be used without a working tree."
 161 }
 162
 163 require_clean_work_tree () {
 164         git rev-parse --verify HEAD >/dev/null || exit 1
 165         git update-index -q --ignore-submodules --refresh
 166         err=0
 167
 168         if ! git diff-files --quiet --ignore-submodules
 169         then
 170                 echo >&2 "Cannot $1: You have unstaged changes."
 171                 err=1
 172         fi
 173
 174         if ! git diff-index --cached --quiet --ignore-submodules HEAD --
 175         then
 176                 if [ $err = 0 ]
 177                 then
 178                     echo >&2 "Cannot $1: Your index contains uncommitted changes."
 179                 else
 180                     echo >&2 "Additionally, your index contains uncommitted changes."
 181                 fi
 182                 err=1
 183         fi
 184
 185         if [ $err = 1 ]
 186         then
 187                 test -n "$2" && echo >&2 "$2"
 188                 exit 1
 189         fi
 190 }
 191
 192 get_author_ident_from_commit () {
 193         pick_author_script='
 194         /^author /{
 195                 s/'\''/'\''\\'\'\''/g
 196                 h
 197                 s/^author \([^<]*\) <[^>]*> .*$/\1/
 198                 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
 199
 200                 g
 201                 s/^author [^<]* <\([^>]*\)> .*$/\1/
 202                 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
 203
 204                 g
 205                 s/^author [^<]* <[^>]*> \(.*\)$/@\1/
 206                 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
 207
 208                 q
 209         }
 210         '
 211         encoding=$(git config i18n.commitencoding || echo UTF-8)
 212         git show -s --pretty=raw --encoding="$encoding" "$1" -- |
 213         LANG=C LC_ALL=C sed -ne "$pick_author_script"
 214 }
 215
 216 # Clear repo-local GIT_* environment variables. Useful when switching to
 217 # another repository (e.g. when entering a submodule). See also the env
 218 # list in git_connect()
 219 clear_local_git_env() {
 220         unset $(git rev-parse --local-env-vars)
 221 }
 222
 223
 224 # Platform specific tweaks to work around some commands
 225 case $(uname -s) in
 226 *MINGW*)
 227         # Windows has its own (incompatible) sort and find
 228         sort () {
 229                 /usr/bin/sort "$@"
 230         }
 231         find () {
 232                 /usr/bin/find "$@"
 233         }
 234         # Let pwd always return the uniqe real windows path
 235         alias pwd='pwd -W'
 236         is_absolute_path () {
 237                 case "$1" in
 238                 [/\\]* | [A-Za-z]:*)
 239                         return 0 ;;
 240                 esac
 241                 return 1
 242         }
 243         ;;
 244 *)
 245         is_absolute_path () {
 246                 case "$1" in
 247                 /*)
 248                         return 0 ;;
 249                 esac
 250                 return 1
 251         }
 252 esac
 253
 254 # Make sure we are in a valid repository of a vintage we understand,
 255 # if we require to be in a git repository.
 256 if test -z "$NONGIT_OK"
 257 then
 258         GIT_DIR=$(git rev-parse --git-dir) || exit
 259         if [ -z "$SUBDIRECTORY_OK" ]
 260         then
 261                 test -z "$(git rev-parse --show-cdup)" || {
 262                         exit=$?
 263                         echo >&2 "You need to run this command from the toplevel of the working tree."
 264                         exit $exit
 265                 }
 266         fi
 267         test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
 268                 echo >&2 "Unable to determine absolute path of git directory"
 269                 exit 1
 270         }
 271         : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
 272 fi