Release v0.4.0 (#131) #2

	name: release

	on:
	push:
	tags: ['v*']

	permissions:
	contents: write

	jobs:
	release:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- name: Setup Go
	uses: actions/setup-go@v4
	with:
	go-version: 1.20.x

	- name: Prepare release
	run: \|
	set -eou pipefail
	make bin/extract-changelog

	# Extract target version number from the git tag and post it to
	# GITHUB_ENV to make it accessible via env.VERSION in other steps.
	VERSION=${{ github.ref }}
	VERSION="${VERSION#refs/tags/}" # refs/tags/v1.2.3 => v1.2.3
	echo "VERSION=$VERSION" >> $GITHUB_ENV

	echo "Releasing $VERSION"

	# Place the release notes in changes.v1.2.3.txt to grab them in the
	# release step.
	echo "Release notes:"
	echo "----"
	bin/extract-changelog $VERSION \| tee changes.$VERSION.txt
	echo "----"

	- name: Release
	uses: goreleaser/goreleaser-action@v4
	with:
	distribution: goreleaser
	version: latest
	args: release --clean --release-notes changes.${{ env.VERSION }}.txt
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	GORELEASER_CURRENT_TAG: ${{ env.VERSION }}

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