Create lib release draft #3

	name: Create lib release draft

	on:
	push:
	tags:
	- 'v[0-9]*'

	permissions:
	contents: write

	jobs:
	draft-release:
	runs-on: ubuntu-latest
	env:
	TAG: ${{ github.ref_name }}
	REPO: ${{ github.repository }}
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	steps:
	- uses: actions/checkout@v4

	- name: Build release notes from CHANGELOG
	shell: bash
	run: \|
	version="${TAG#v}"

	# Pull lines from `## nom-exif vX.Y.Z` (allowing trailing space or paren)
	# until the next `## ` heading.
	notes=$(awk -v ver="$version" '
	$0 ~ "^## nom-exif v" ver "[ (]" { found=1; next }
	found && $0 ~ "^## " { exit }
	found { print }
	' CHANGELOG.md)

	# Trim trailing blank lines.
	notes=$(printf '%s\n' "$notes" \| awk 'BEGIN{n=0} {a[n++]=$0} END{while(n>0 && a[n-1]=="") n--; for(i=0;i<n;i++) print a[i]}')

	if [ -z "$notes" ]; then
	echo "::error::no CHANGELOG section found for v${version}"
	exit 1
	fi

	{
	printf '%s\n' "$notes"
	echo ""
	echo "---"
	echo ""
	echo "Full changelog: [CHANGELOG.md](https://github.com/${REPO}/blob/${TAG}/CHANGELOG.md) · crates.io: [nom-exif ${version}](https://crates.io/crates/nom-exif/${version})"
	} > release-notes.md

	- name: Create draft GitHub release
	shell: bash
	run: gh release create "$TAG" --title "$TAG" --notes-file release-notes.md --draft

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