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executable file 83 lines (72 sloc) 1.749 kb
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#!/bin/sh
#
# This is included in commands that either have to be run from the toplevel
# of the repository, or with GIT_DIR environment variable properly.
# If the GIT_DIR does not look like the right correct git-repository,
# it dies.

# Having this variable in your environment would break scripts because
# you would cause "cd" to be be taken to unexpected places. If you
# like CDPATH, define it for your interactive shell sessions without
# exporting it.
unset CDPATH

die() {
echo >&2 "$@"
exit 1
}

usage() {
die "Usage: $0 $USAGE"
}

set_reflog_action() {
if [ -z "${GIT_REFLOG_ACTION:+set}" ]
then
GIT_REFLOG_ACTION="$*"
export GIT_REFLOG_ACTION
fi
}

is_bare_repository () {
git-config --bool --get core.bare ||
case "$GIT_DIR" in
.git | */.git) echo false ;;
*) echo true ;;
esac
}

cd_to_toplevel () {
cdup=$(git-rev-parse --show-cdup)
if test ! -z "$cdup"
then
cd "$cdup" || {
echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
exit 1
}
fi
}

require_work_tree () {
test $(is_bare_repository) = false &&
test $(git-rev-parse --is-inside-git-dir) = false ||
die "fatal: $0 cannot be used without a working tree."
}

if [ -z "$LONG_USAGE" ]
then
LONG_USAGE="Usage: $0 $USAGE"
else
LONG_USAGE="Usage: $0 $USAGE

$LONG_USAGE"
fi

case "$1" in
-h|--h|--he|--hel|--help)
echo "$LONG_USAGE"
exit
esac

# Make sure we are in a valid repository of a vintage we understand.
if [ -z "$SUBDIRECTORY_OK" ]
then
: ${GIT_DIR=.git}
GIT_DIR=$(GIT_DIR="$GIT_DIR" git-rev-parse --git-dir) || {
exit=$?
echo >&2 "You need to run this command from the toplevel of the working tree."
exit $exit
}
else
GIT_DIR=$(git-rev-parse --git-dir) || exit
fi
: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
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