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