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                 printf '%s\n' "$*"
  59         fi
  60 }
  61
  62 if test -n "$OPTIONS_SPEC"; then
  63         usage() {
  64                 "$0" -h
  65                 exit 1
  66         }
  67
  68         parseopt_extra=
  69         [ -n "$OPTIONS_KEEPDASHDASH" ] &&
  70                 parseopt_extra="--keep-dashdash"
  71
  72         eval "$(
  73                 echo "$OPTIONS_SPEC" |
  74                         git rev-parse --parseopt $parseopt_extra -- "$@" ||
  75                 echo exit $?
  76         )"
  77 else
  78         dashless=$(basename "$0" | sed -e 's/-/ /')
  79         usage() {
  80                 die "Usage: $dashless $USAGE"
  81         }
  82
  83         if [ -z "$LONG_USAGE" ]
  84         then
  85                 LONG_USAGE="Usage: $dashless $USAGE"
  86         else
  87                 LONG_USAGE="Usage: $dashless $USAGE
  88
  89 $LONG_USAGE"
  90         fi
  91
  92         case "$1" in
  93                 -h)
  94                 echo "$LONG_USAGE"
  95                 exit
  96         esac
  97 fi
  98
  99 set_reflog_action() {
 100         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
 101         then
 102                 GIT_REFLOG_ACTION="$*"
 103                 export GIT_REFLOG_ACTION
 104         fi
 105 }
 106
 107 git_editor() {
 108         if test -z "${GIT_EDITOR:+set}"
 109         then
 110                 GIT_EDITOR="$(git var GIT_EDITOR)" || return $?
 111         fi
 112
 113         eval "$GIT_EDITOR" '"$@"'
 114 }
 115
 116 git_pager() {
 117         if test -t 1
 118         then
 119                 GIT_PAGER=$(git var GIT_PAGER)
 120         else
 121                 GIT_PAGER=cat
 122         fi
 123         : ${LESS=-FRSX}
 124         export LESS
 125
 126         eval "$GIT_PAGER" '"$@"'
 127 }
 128
 129 sane_grep () {
 130         GREP_OPTIONS= LC_ALL=C grep "$@"
 131 }
 132
 133 sane_egrep () {
 134         GREP_OPTIONS= LC_ALL=C egrep "$@"
 135 }
 136
 137 is_bare_repository () {
 138         git rev-parse --is-bare-repository
 139 }
 140
 141 cd_to_toplevel () {
 142         cdup=$(git rev-parse --show-toplevel) &&
 143         cd "$cdup" || {
 144                 echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
 145                 exit 1
 146         }
 147 }
 148
 149 require_work_tree_exists () {
 150         if test "z$(git rev-parse --is-bare-repository)" != zfalse
 151         then
 152                 die "fatal: $0 cannot be used without a working tree."
 153         fi
 154 }
 155
 156 require_work_tree () {
 157         test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
 158         die "fatal: $0 cannot be used without a working tree."
 159 }
 160
 161 require_clean_work_tree () {
 162         git rev-parse --verify HEAD >/dev/null || exit 1
 163         git update-index -q --ignore-submodules --refresh
 164         err=0
 165
 166         if ! git diff-files --quiet --ignore-submodules
 167         then
 168                 echo >&2 "Cannot $1: You have unstaged changes."
 169                 err=1
 170         fi
 171
 172         if ! git diff-index --cached --quiet --ignore-submodules HEAD --
 173         then
 174                 if [ $err = 0 ]
 175                 then
 176                     echo >&2 "Cannot $1: Your index contains uncommitted changes."
 177                 else
 178                     echo >&2 "Additionally, your index contains uncommitted changes."
 179                 fi
 180                 err=1
 181         fi
 182
 183         if [ $err = 1 ]
 184         then
 185                 test -n "$2" && echo >&2 "$2"
 186                 exit 1
 187         fi
 188 }
 189
 190 get_author_ident_from_commit () {
 191         pick_author_script='
 192         /^author /{
 193                 s/'\''/'\''\\'\'\''/g
 194                 h
 195                 s/^author \([^<]*\) <[^>]*> .*$/\1/
 196                 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
 197
 198                 g
 199                 s/^author [^<]* <\([^>]*\)> .*$/\1/
 200                 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
 201
 202                 g
 203                 s/^author [^<]* <[^>]*> \(.*\)$/@\1/
 204                 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
 205
 206                 q
 207         }
 208         '
 209         encoding=$(git config i18n.commitencoding || echo UTF-8)
 210         git show -s --pretty=raw --encoding="$encoding" "$1" -- |
 211         LANG=C LC_ALL=C sed -ne "$pick_author_script"
 212 }
 213
 214 # Clear repo-local GIT_* environment variables. Useful when switching to
 215 # another repository (e.g. when entering a submodule). See also the env
 216 # list in git_connect()
 217 clear_local_git_env() {
 218         unset $(git rev-parse --local-env-vars)
 219 }
 220
 221
 222 # Platform specific tweaks to work around some commands
 223 case $(uname -s) in
 224 *MINGW*)
 225         # Windows has its own (incompatible) sort and find
 226         sort () {
 227                 /usr/bin/sort "$@"
 228         }
 229         find () {
 230                 /usr/bin/find "$@"
 231         }
 232         # git sees Windows-style pwd
 233         pwd () {
 234                 builtin pwd -W
 235         }
 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