scripts: Provide a release script

Support making releases of uvc-gadget by introducing a helper script
which will facilitate the increment of any release version, along with
generating an associated tag, derived from the equivalent implementation
in libcamera [0].

[0] https://git.libcamera.org/libcamera/libcamera.git/tree/utils/release.sh?h=v0.0.2

Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/scripts/release.sh b/scripts/release.sh
new file mode 100755
index 0000000..2de0063
--- /dev/null
+++ b/scripts/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 scripts/gen-version.sh ] || [ ! -e .git ]; then
+	echo "This release script must be run from the root of uvc-gadget 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=$(./scripts/gen-version.sh)
+
+# Decide if we are here to bump major, minor, or patch release.
+case $1 in
+	major|minor|patch)
+		bump=$1;
+		;;
+	*)
+		echo "You must specify the version bump level: (major, minor, patch)"
+		exit 1
+		;;
+esac
+
+new_version=$(./scripts/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 "uvc-gadget v$new_version"
+
+# Create a tag from that commit
+git show -s --format=%B | git tag "v$new_version" -s -F -