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 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 die() {
  15         echo >&2 "$@"
  16         exit 1
  17 }
  18
  19 usage() {
  20         die "Usage: $0 $USAGE"
  21 }
  22
  23 set_reflog_action() {
  24         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
  25         then
  26                 GIT_REFLOG_ACTION="$*"
  27                 export GIT_REFLOG_ACTION
  28         fi
  29 }
  30
  31 is_bare_repository () {
  32         git-config --bool --get core.bare ||
  33         case "$GIT_DIR" in
  34         .git | */.git) echo false ;;
  35         *) echo true ;;
  36         esac
  37 }
  38
  39 cd_to_toplevel () {
  40         cdup=$(git-rev-parse --show-cdup)
  41         if test ! -z "$cdup"
  42         then
  43                 cd "$cdup" || {
  44                         echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
  45                         exit 1
  46                 }
  47         fi
  48 }
  49
  50 require_work_tree () {
  51         test $(is_bare_repository) = false &&
  52         test $(git-rev-parse --is-inside-git-dir) = false ||
  53         die "fatal: $0 cannot be used without a working tree."
  54 }
  55
  56 if [ -z "$LONG_USAGE" ]
  57 then
  58         LONG_USAGE="Usage: $0 $USAGE"
  59 else
  60         LONG_USAGE="Usage: $0 $USAGE
  61
  62 $LONG_USAGE"
  63 fi
  64
  65 case "$1" in
  66         -h|--h|--he|--hel|--help)
  67         echo "$LONG_USAGE"
  68         exit
  69 esac
  70
  71 # Make sure we are in a valid repository of a vintage we understand.
  72 if [ -z "$SUBDIRECTORY_OK" ]
  73 then
  74         : ${GIT_DIR=.git}
  75         GIT_DIR=$(GIT_DIR="$GIT_DIR" git-rev-parse --git-dir) || {
  76                 exit=$?
  77                 echo >&2 "You need to run this command from the toplevel of the working tree."
  78                 exit $exit
  79         }
  80 else
  81         GIT_DIR=$(git-rev-parse --git-dir) || exit
  82 fi
  83 : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}