Code

diffcore-break: micro-optimize by avoiding delta between identical files.
[git.git] / 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.
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
14 die() {
15         echo >&2 "$@"
16         exit 1
17 }
19 usage() {
20         die "Usage: $0 $USAGE"
21 }
23 if [ -z "$LONG_USAGE" ]
24 then
25         LONG_USAGE="Usage: $0 $USAGE"
26 else
27         LONG_USAGE="Usage: $0 $USAGE
29 $LONG_USAGE"
30 fi
32 case "$1" in
33         --h|--he|--hel|--help)
34         echo "$LONG_USAGE"
35         exit
36 esac
38 if [ -z "$SUBDIRECTORY_OK" ]
39 then
40         : ${GIT_DIR=.git}
41         : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
43         # Make sure we are in a valid repository of a vintage we understand.
44         GIT_DIR="$GIT_DIR" git repo-config --get core.nosuch >/dev/null
45         if test $? = 128
46         then
47             exit
48         fi
49 else
50         GIT_DIR=$(git-rev-parse --git-dir) || exit
51 fi