2 files changed, 75 insertions, 0 deletions
diff --git a/src/libregit/Makefile b/src/libregit/Makefile
new file mode 100644
index 0000000..2c76089
--- /dev/null
+++ b/src/libregit/Makefile
@@ -0,0 +1 @@
+include ../../common.mk
diff --git a/src/libregit/libregit b/src/libregit/libregit
new file mode 100755
index 0000000..8687d2f
--- /dev/null
+++ b/src/libregit/libregit
@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+
+#   Copyright (c) 2012-2013 Pacman Development Team <pacman-dev@archlinux.org>
+#   Copyright (c) 2012-2013 Luke Shumaker <lukeshu@sbcglobal.net>
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. libremessages
+
+cd_safe() {
+	if ! cd "$1"; then
+		error "Failed to change to directory %s" "$1"
+		plain "Aborting..."
+		exit 1
+	fi
+}
+
+download_git() {
+	if [[ ! -d "$dir/.git" ]] ; then
+		msg2 "Cloning %s %s repo..." "${repo}" "git"
+		if ! git clone "$repo" "$dir"; then
+			error "Failure while downloading %s %s repo" "${repo}" "git"
+			plain "Aborting..."
+			exit 1
+		fi
+	else
+		cd_safe "$dir"
+		# Make sure we are fetching the right repo
+		if [[ "$repo" != "$(git config --get remote.origin.url)"  ]] ; then
+			error "%s is not a clone of %s" "$dir" "$repo"
+			plain "Aborting..."
+			exit 1
+		fi
+		msg2 "Updating %s %s repo..." "${repo}" "git"
+		if ! git pull origin "$ref"; then
+			# only warn on failure to allow offline builds
+			warning "Failure while updating %s %s repo" "${repo}" "git"
+		fi
+	fi
+}
+
+usage() {
+	print 'Usage: %s repo ref dir' "${0##*/}"
+	echo
+	print "Clones or pulls from the git URL 'repo', and checks out the git ref"
+	print "'ref' to the directory 'dir'."
+	echo
+	print "It does safety checks, figures out whether to clone or pull, and other"
+	print "helpful things.  This exists because the same 'download_git' function"
+	print "from makepkg was being copied again and again."
+}
+
+main() {
+	[[ $# == 3 ]] || { usage >&2; return 1; }
+	repo=$1
+	ref=$2
+	dir=$3
+
+	[[ -d "${dir%/*}" ]] || mkdir -p "${dir%/*}"
+	download_git
+}
+
+main "$@"