add libregit; a git downloader. Basically parabolaweb-downloadv20130714

1 files changed, 74 insertions, 0 deletions

diff --git a/src/libregit b/src/libregit
new file mode 100755
index 0000000..86fbef9
--- /dev/null
+++ b/src/libregit
@@ -0,0 +1,74 @@
+#!/bin/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 "$1"; then
+		error "$(gettext "Failed to change to directory %s")" "$1"
+		plain "$(gettext "Aborting...")"
+		exit 1
+	fi
+}
+
+download_git() {
+	if [[ ! -d "$dir/.git" ]] ; then
+		msg2 "$(gettext "Cloning %s %s repo...")" "${repo}" "git"
+		if ! git clone "$repo" "$dir"; then
+			error "$(gettext "Failure while downloading %s %s repo")" "${repo}" "git"
+			plain "$(gettext "Aborting...")"
+			exit 1
+		fi
+	else
+		cd_safe "$dir"
+		# Make sure we are fetching the right repo
+		if [[ "$repo" != "$(git config --get remote.origin.url)"  ]] ; then
+			error "$(gettext "%s is not a clone of %s")" "$dir" "$repo"
+			plain "$(gettext "Aborting...")"
+			exit 1
+		fi
+		msg2 "$(gettext "Updating %s %s repo...")" "${repo}" "git"
+		if ! git pull origin "$ref"; then
+			# only warn on failure to allow offline builds
+			warning "$(gettext "Failure while updating %s %s repo")" "${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 "${dir%/*}"
+	download_git
+}
+
+main "$@"