git-export

#!/bin/bash
#
# Script that exports a git repo
#

TREEISH="HEAD"
# Set usage output
DESCRIPTION="Export a git repo to a clean directory"
USAGE="[-h |--help] [-b <branch> | --branch=<branch>] [-f | --force] [-t | --tgz] <destination>"
LONGUSAGE="Common options:
\t-h, --help\n\t\tPrint this help message
\t-b <branch>, --branch=<branch>\n\t\tOperate on given branch rather than HEAD
\t-f, --force\n\t\tForce operation, even target exists
\t-t, --tgz\n\t\tMake a tarball <destination>.tgz instead of extracting to a directory
<destination>\n\t\tDestination directory for export
"
# Standard functions
GTWS_LOC=$(readlink -f $(dirname "$0"))
source ${GTWS_LOC}/gtws.sh

# Script name
ME=$(basename $0)

# Parse arguments
ARGS=`getopt -o hft --long help,all,force,tgz -n "${ME}" -- "$@"`

if [ $? != 0 ] ; then
	usage "invalid arguments"
fi
eval set -- "$ARGS"

while true ; do
	case "$1" in
		-h|--help) usage; shift ;;
		-f|--force) FORCE="yes"; shift ;;
		-t|--tgz) TGZ=".tgz"; shift ;;
		--) shift ; break ;;
		* ) usage "Invalid argument $1";;
	esac
done

# Remaining arguments are in $1, $2, etc. as normal
if [ $# -ne 1 ]; then 
	usage "You can only export to a single destination"
fi
DEST=${1}${TGZ}

if [ -e "${DEST}" ]; then
	if [ -z "${FORCE}" ]; then
		usage "Destination ${DEST} exists"
	fi

	rm -rf "${DEST}"
fi

SUBDIRECTORY_OK=Yes
GITPATH="$(git --exec-path)"
source "${GITPATH}/git-sh-setup"
cd_to_toplevel
if [ -z "${TGZ}" ]; then
	echo "Exporting git repository to ${DEST}"
	"${GITPATH}/git-checkout-index" -a --prefix=${DEST}/
else
	BASE=$(basename "${DEST}" "${TGZ}")
	echo "Exporting git repository to ${DEST}"
	git archive --format tgz --prefix "${BASE}/" "${TREEISH}" > "${DEST}"
fi