From: Matthias Kruk <m@m10k.eu>
Date: Sun, 1 Aug 2021 22:12:02 +0000 (+0900)
Subject: include/git: Add module for interaction with git repositories
X-Git-Url: https://git.corax.cc/?a=commitdiff_plain;h=f844a613ea42c8ca8aa4ed1656a906bf78cf79b2;p=toolbox

include/git: Add module for interaction with git repositories

This commit adds the git module, which implements a set of functions
to simplify interaction with git repositories.
---

diff --git a/include/git.sh b/include/git.sh
new file mode 100644
index 0000000..620c62a
--- /dev/null
+++ b/include/git.sh
@@ -0,0 +1,137 @@
+#!/bin/bash
+
+# git.sh - Toolbox module for interaction with git
+# Copyright (C) 2021 Matthias Kruk
+#
+# 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 3 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 <https://www.gnu.org/licenses/>.
+
+__init() {
+	if ! include "log"; then
+		return 1
+	fi
+
+	return 0
+}
+
+git_clone() {
+	local source="$1"
+	local destination="$2"
+
+	local output
+
+	if ! output=$(git clone "$source" "$destination" 2>&1); then
+		log_error "Could not clone $source to $destination"
+		log_highlight "git clone" <<< "$output" | log_error
+		return 1
+	fi
+
+	return 0
+}
+
+git_current_branch() {
+	local repository="$1"
+
+	if ! grep -oP "refs/heads/\K.*" < "$repository/.git/HEAD"; then
+		log_error "Could not get current branch of $repository"
+		return 1
+	fi
+
+	return 0
+}
+
+git_checkout() {
+	local repository="$1"
+	local branch="$2"
+
+	local output
+
+	if (( $# < 2 )); then
+		branch="master"
+	fi
+
+	if ! output=$(cd "$repository" && git checkout "$branch" 2>&1); then
+		log_error "Could not check out $branch in $repository"
+		log_highlight "git checkout" <<< "$output" | log_error
+		return 1
+	fi
+
+	return 0
+}
+
+git_merge() {
+	local repository="$1"
+	local source="$2"
+	local destination="$3"
+
+	local original_branch
+	local output
+	local err
+
+	err=0
+
+	if ! original_branch=$(git_current_branch "$repository"); then
+		return 1
+	fi
+
+	if (( $# < 3 )); then
+		destination="$original_branch"
+	fi
+
+	if [[ "$original_branch" != "$destination" ]]; then
+		if ! git_checkout "$repository" "$destination"; then
+			return 1
+		fi
+	fi
+
+	if ! output=$(cd "$repository" && git merge "$source" 2>&1); then
+		log_error "Could not merge $source info $destination of $repository"
+		log_highlight "git merge" <<< "$output" | log_error
+		err=1
+	fi
+
+	if [[ "$original_branch" != "$destination" ]]; then
+		if ! git_checkout "$repository" "$original_branch"; then
+			log_error "Could not check out previous branch $original_branch"
+			return 1
+		fi
+	fi
+
+	return "$err"
+}
+
+git_push() {
+	local repository="$1"
+	local branch="$2"
+	local remote="$3"
+
+	local output
+
+	if (( $# < 3 )); then
+		remote="origin"
+	fi
+
+	if (( $# < 2 )); then
+		if ! branch=$(git_current_branch "$repository"); then
+			return 1
+		fi
+	fi
+
+	if ! output=$(cd "$repository" && git push "$remote" "$branch" 2>&1); then
+		log_error "Could not push to $branch of $repository to $remote"
+		log_highlight "git push" <<< "$output" | log_error
+		return 1
+	fi
+
+	return 0
+}