1 files changed, 144 insertions, 0 deletions
diff --git a/git-sh-setup.sh b/git-sh-setup.sh
new file mode 100755
index 0000000000..a44b1c74a3
--- /dev/null
+++ b/git-sh-setup.sh
@@ -0,0 +1,144 @@
+#!/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 taken to unexpected places.  If you
+# like CDPATH, define it for your interactive shell sessions without
+# exporting it.
+unset CDPATH
+
+die() {
+	echo >&2 "$@"
+	exit 1
+}
+
+if test -n "$OPTIONS_SPEC"; then
+	usage() {
+		"$0" -h
+		exit 1
+	}
+
+	parseopt_extra=
+	[ -n "$OPTIONS_KEEPDASHDASH" ] &&
+		parseopt_extra="--keep-dashdash"
+
+	eval "$(
+		echo "$OPTIONS_SPEC" |
+			git rev-parse --parseopt $parseopt_extra -- "$@" ||
+		echo exit $?
+	)"
+else
+	usage() {
+		die "Usage: $0 $USAGE"
+	}
+
+	if [ -z "$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
+fi
+
+set_reflog_action() {
+	if [ -z "${GIT_REFLOG_ACTION:+set}" ]
+	then
+		GIT_REFLOG_ACTION="$*"
+		export GIT_REFLOG_ACTION
+	fi
+}
+
+git_editor() {
+	: "${GIT_EDITOR:=$(git config core.editor)}"
+	: "${GIT_EDITOR:=${VISUAL:-${EDITOR}}}"
+	case "$GIT_EDITOR,$TERM" in
+	,dumb)
+		echo >&2 "No editor specified in GIT_EDITOR, core.editor, VISUAL,"
+		echo >&2 "or EDITOR. Tried to fall back to vi but terminal is dumb."
+		echo >&2 "Please set one of these variables to an appropriate"
+		echo >&2 "editor or run $0 with options that will not cause an"
+		echo >&2 "editor to be invoked (e.g., -m or -F for git-commit)."
+		exit 1
+		;;
+	esac
+	eval "${GIT_EDITOR:=vi}" '"$@"'
+}
+
+is_bare_repository () {
+	git rev-parse --is-bare-repository
+}
+
+cd_to_toplevel () {
+	cdup=$(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 $(git rev-parse --is-inside-work-tree) = true ||
+	die "fatal: $0 cannot be used without a working tree."
+}
+
+get_author_ident_from_commit () {
+	pick_author_script='
+	/^author /{
+		s/'\''/'\''\\'\'\''/g
+		h
+		s/^author \([^<]*\) <[^>]*> .*$/\1/
+		s/'\''/'\''\'\'\''/g
+		s/.*/GIT_AUTHOR_NAME='\''&'\''/p
+
+		g
+		s/^author [^<]* <\([^>]*\)> .*$/\1/
+		s/'\''/'\''\'\'\''/g
+		s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
+
+		g
+		s/^author [^<]* <[^>]*> \(.*\)$/\1/
+		s/'\''/'\''\'\'\''/g
+		s/.*/GIT_AUTHOR_DATE='\''&'\''/p
+
+		q
+	}
+	'
+	encoding=$(git config i18n.commitencoding || echo UTF-8)
+	git show -s --pretty=raw --encoding="$encoding" "$1" -- |
+	LANG=C LC_ALL=C sed -ne "$pick_author_script"
+}
+
+# Make sure we are in a valid repository of a vintage we understand,
+# if we require to be in a git repository.
+if test -z "$NONGIT_OK"
+then
+	GIT_DIR=$(git rev-parse --git-dir) || exit
+	if [ -z "$SUBDIRECTORY_OK" ]
+	then
+		test -z "$(git rev-parse --show-cdup)" || {
+			exit=$?
+			echo >&2 "You need to run this command from the toplevel of the working tree."
+			exit $exit
+		}
+	fi
+	test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
+		echo >&2 "Unable to determine absolute path of git directory"
+		exit 1
+	}
+	: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
+fi