utils: Provide a release script

Support making releases of libcamera by introducing a helper script
which will facilitate the increment of any release version, along with
generating an associated tag.

Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

utils/release.sh

@@ -0,0 +1,46 @@
+#!/bin/sh
+
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Prepare a project release
+
+set -e
+
+# Abort if we are not within the project root or the tree is not clean.
+if [ ! -e utils/gen-version.sh ] || [ ! -e .git ]; then
+	echo "This release script must be run from the root of libcamera git tree."
+	exit 1
+fi
+
+if ! git diff-index --quiet HEAD; then
+	echo "Tree must be clean to release."
+	exit 1
+fi
+
+# Identify current version components
+version=$(./utils/gen-version.sh)
+
+# Decide if we are here to bump major, minor, or patch release.
+case $1 in
+	major|minor|patch)
+		bump=$1;
+		;;
+	*)
+		echo "You must specify the version bump level: (major, minor, patch)"
+		exit 1
+		;;
+esac
+
+new_version=$(./utils/semver bump "$bump" "$version")
+
+echo "Bumping $bump"
+echo "  Existing version is: $version"
+echo "  New version is : $new_version"
+
+# Patch in the version to our meson.build
+sed -i -E "s/ version : '.*',/ version : '$new_version',/" meson.build
+
+# Commit the update
+git commit meson.build -esm "libcamera v$new_version"
+
+# Create a tag from that commit
+git show -s --format=%B | git tag "v$new_version" -s -F -