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Update Submodules to Latest Tag #182

	name: Update Submodules to Latest Tag

	on:
	schedule:
	- cron: '32 6 * * *' # Daily at 6:32 AM UTC
	workflow_dispatch:

	jobs:
	update-submodules:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repo with submodules
	uses: actions/checkout@v5
	with:
	submodules: true
	token: ${{ secrets.GITHUB_TOKEN }}

	- name: Update all submodules to latest tags
	run: \|
	set -e

	updated=false

	output="$(
	git submodule -q foreach '
	git fetch --tags origin

	# Tag closest behind origin/HEAD
	tag="$(git describe --tags --abbrev=0 origin/HEAD 2>/dev/null \|\| true)"

	# Match only version-like tags
	regex="^[vV]?[0-9]+(\.[0-9]+)*$"

	cur="$(git describe --tags 2>/dev/null \|\| echo "none")"

	if echo "$tag" \| grep -qE "^$regex$" && [ "$cur" != "$tag" ] &&
	printf "%s\n%s" "$cur" "$tag" \| sort -VC; then
	git switch -dq -- "$tag"
	echo "$name: $cur -> $tag"
	fi
	'
	)"

	if [ -n "$output" ]; then
	echo "$output"
	git config user.name "github-actions[bot]"
	git config user.email "github-actions[bot]@users.noreply.github.com"
	git add .
	git commit -m "Update submodules to latest tags"
	git show --raw
	git push
	else
	echo "No submodules updated."
	fi

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