cache #23

	name: change

	on:
	push:
	branches:
	- '*'

	jobs:
	changelog:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Generate
	run: \|
	tags=$(git tag --merged $(git rev-parse HEAD) --sort=-creatordate)
	if [ -f CHANGELOG.md ]; then
	previous=$(grep -oP '^## \K.*' CHANGELOG.md \| head -n 1)
	fi
	for tag in $tags; do
	if [ "$tag" == "$previous" ]; then
	break
	fi
	echo "## $tag" >> NEW_CHANGELOG.md
	echo "" >> NEW_CHANGELOG.md
	git log --pretty=format:"%B" "$tag..$previous" \| awk 'NF {print "- " $0} !NF {print ""}' >> NEW_CHANGELOG.md
	echo "" >> NEW_CHANGELOG.md
	if [ -z "$previous" ]; then
	break;
	fi
	previous=$tag
	done
	if [ -f CHANGELOG.md ]; then
	cat CHANGELOG.md >> NEW_CHANGELOG.md
	fi
	mv NEW_CHANGELOG.md CHANGELOG.md

	- name: Commit
	run: \|
	git config --local user.email "action@github.com"
	git config --local user.name "GitHub Action"
	git add CHANGELOG.md

	if ! git diff --cached --quiet; then
	git commit -m "Update Changelog"
	git push
	fi
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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