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, 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.
  18 IFS='
  19 '
  20
  21 git_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
  49 die () {
  50         die_with_status 1 "$@"
  51 }
  52
  53 die_with_status () {
  54         status=$1
  55         shift
  56         echo >&2 "$*"
  57         exit "$status"
  58 }
  59
  60 GIT_QUIET=
  61
  62 say () {
  63         if test -z "$GIT_QUIET"
  64         then
  65                 printf '%s\n' "$*"
  66         fi
  67 }
  68
  69 if test -n "$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 $?
  83         )"
  84 else
  85         dashless=$(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
 104 fi
 105
 106 set_reflog_action() {
 107         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
 108         then
 109                 GIT_REFLOG_ACTION="$*"
 110                 export GIT_REFLOG_ACTION
 111         fi
 112 }
 113
 114 git_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" '"$@"'
 121 }
 122
 123 git_pager() {
 124         if test -t 1
 125         then
 126                 GIT_PAGER=$(git var GIT_PAGER)
 127         else
 128                 GIT_PAGER=cat
 129         fi
 130         : ${LESS=-FRSX}
 131         export LESS
 132
 133         eval "$GIT_PAGER" '"$@"'
 134 }
 135
 136 sane_grep () {
 137         GREP_OPTIONS= LC_ALL=C grep "$@"
 138 }
 139
 140 sane_egrep () {
 141         GREP_OPTIONS= LC_ALL=C egrep "$@"
 142 }
 143
 144 is_bare_repository () {
 145         git rev-parse --is-bare-repository
 146 }
 147
 148 cd_to_toplevel () {
 149         cdup=$(git rev-parse --show-toplevel) &&
 150         cd "$cdup" || {
 151                 echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
 152                 exit 1
 153         }
 154 }
 155
 156 require_work_tree_exists () {
 157         if test "z$(git rev-parse --is-bare-repository)" != zfalse
 158         then
 159                 die "fatal: $0 cannot be used without a working tree."
 160         fi
 161 }
 162
 163 require_work_tree () {
 164         test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
 165         die "fatal: $0 cannot be used without a working tree."
 166 }
 167
 168 require_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 get_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()
 224 clear_local_git_env() {
 225         unset $(git rev-parse --local-env-vars)
 226 }
 227
 228
 229 # Platform specific tweaks to work around some commands
 230 case $(uname -s) in
 231 *MINGW*)
 232         # Windows has its own (incompatible) sort and find
 233         sort () {
 234                 /usr/bin/sort "$@"
 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 "$1" in
 254                 /*)
 255                         return 0 ;;
 256                 esac
 257                 return 1
 258         }
 259 esac
 260
 261 # Make sure we are in a valid repository of a vintage we understand,
 262 # if we require to be in a git repository.
 263 if test -z "$NONGIT_OK"
 264 then
 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"}
 279 fi