rename libregit to gitget, add bare repository support

3 files changed, 198 insertions, 0 deletions

diff --git a/src/gitget/Makefile b/src/gitget/Makefile
new file mode 100644
index 0000000..2c76089
--- /dev/null
+++ b/src/gitget/Makefile
@@ -0,0 +1 @@
+include ../../common.mk
diff --git a/src/gitget/gitget b/src/gitget/gitget
new file mode 100755
index 0000000..0ec959b
--- /dev/null
+++ b/src/gitget/gitget
@@ -0,0 +1,157 @@
+#!/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
+
+# from makepkg
+dir_is_empty() {
+	(
+		shopt -s dotglob nullglob
+		files=("$1"/*)
+		(( ${#files} == 0 ))
+	)
+}
+
+# from makepkg 
+cd_safe() {
+	if ! cd "$1"; then
+		error "Failed to change to directory %s" "$1"
+		plain "Aborting..."
+		exit 1
+	fi
+}
+
+# from makepkg
+download_git_checkout() (
+	local url=$1
+	local ref=$2
+	local dir=$3
+	local name=${4:-${dir##*/}}
+
+	if [[ ! -d "$dir/.git" ]] ; then
+		msg2 "Cloning %s %s repo..." "${name}" "git"
+		if ! git clone "$url" "$dir"; then
+			error "Failure while downloading %s %s repo" "${name}" "git"
+			plain "Aborting..."
+			exit 1
+		fi
+		cd_safe "$dir"
+		git checkout "$ref"
+	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" "$url"
+			plain "Aborting..."
+			exit 1
+		fi
+		msg2 "Updating %s %s repo..." "${name}" "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
+)
+
+# from makepkg
+download_git_bare() (
+	local url=$1
+	local dir=$2
+	local name=${3:-${dir##*/}}
+
+	if [[ ! -d "$dir" ]] || dir_is_empty "$dir" ; then
+		msg2 "Cloning %s %s repo..." "${name}" "git"
+		if ! git clone --mirror "$url" "$dir"; then
+			error "Failure while downloading %s %s repo" "${name}" "git"
+			plain "Aborting..."
+			exit 1
+		fi
+	else
+		cd_safe "$dir"
+		# Make sure we are fetching the right repo
+		if [[ "$url" != "$(git config --get remote.origin.url)"  ]] ; then
+			error "%s is not a clone of %s" "$dir" "$url"
+			plain "Aborting..."
+			exit 1
+		fi
+		msg2 "Updating %s %s repo..." "${name}" "git"
+		if ! git fetch --all -p; then
+			# only warn on failure to allow offline builds
+			warning "Failure while updating %s %s repo" "${name}" "git"
+		fi
+	fi
+)
+
+usage() {
+	print 'Usage: %s [OPTIONS] bare URL DIRECTORY' "${0##*/}"
+	print 'Usage: %s [OPTIONS] checkout URL DIRECTORY' "${0##*/}"
+	print 'A URL-handler for git urls.  Capable of updating or cloning.'
+	echo
+	prose "Clones or pulls from the git URL, to a local DIRECTORY.  If
+	       \`bare\` is specified, it will create a bare repository; if
+	       \`checkout\` is specified, it will create or update a working tree."
+	echo
+	prose 'For a checkout, the tree to checkout is specified by appending
+	       `#ANYTHING=TREE-ISH` to the URL.  For example, `#branch=stable`,
+	       or `#tag=v12.3`.  Whatever is on the left side of the equal sign
+	       is ignored, this is for compatability with `makepkg` source
+	       URLs.'
+	echo
+	prose "The URL may be prefixed with \`git+\`.  This is also for
+	       compatability with \`makepkg\` source URLs."
+	echo
+	prose "It does safety checks, figures out whether to clone or pull, and
+	       other helpful things.  This exists because the same
+	       \`download_git\` function from makepkg was being copied and
+	       pasted again and again."
+	echo
+	print "Options:"
+	flag "-n $(_ NAME)" \
+		'In messages, instead of using the basename of DIRECTORY as the
+		 repository name, use NAME'
+	flag '-h' 'Show this message'
+}
+
+main() {
+	local name=''
+	while getopts 'n:h' flag; do
+		case "${flag}" in
+			n) name=$OPTARG;;
+			h) usage; return 0;;
+			*) usage >&2; return 1;;
+		esac
+	done
+	[[ $# == 3 ]] || { usage >&2; return 1; }
+	local mode=$1
+	local url=${2#git+}
+	local dir=$3
+
+	local urlmain=${url%%#*}
+	local urlfrag=${url#*#}
+	local ref=${urlfrag#*=}
+
+	name=${name:-${dir##*/}}
+
+	case "$mode" in
+		checkout) download_git_checkout "$urlmain" "$ref" "$dir" "$name";;
+		bare) download_git_bare "$urlmain" "$dir" "$name";;
+		*) usage >&2; return 1;;
+	esac
+}
+
+main "$@"
diff --git a/src/gitget/libregit b/src/gitget/libregit
new file mode 100755
index 0000000..f89a402
--- /dev/null
+++ b/src/gitget/libregit
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+
+#   Copyright (c) 2012-2013 Luke Shumaker <lukeshu@sbcglobal.net>
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. libremessages
+
+usage() {
+	print 'Usage: %s repo ref dir' "${0##*/}"
+	print 'A compatability wrapper around `gitget checkout`'
+	echo
+	prose "This exists because gitget used to be called libregit, and took
+	       the arguments in this format, and I'm sure there are a few
+	       scripts floating around that use it."
+	echo
+	prose "Clones or pulls from the git URL 'repo', and checks out the git
+	       ref 'ref' to the directory 'dir'."
+}
+
+
+main() {
+	[[ $# == 3 ]] || { usage >&2; return 1; }
+	repo=$1
+	ref=$2
+	dir=$3
+
+	gitget checkout "${repo}#ref=${ref}" "${dir}"
+}