Upgrade to 28.0 #5

	name: ci

	on:
	push:
	branches:
	- main
	tags:
	- v*
	pull_request:

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-latest
	permissions:
	id-token: write
	packages: write
	contents: read
	attestations: write
	env:
	IMAGE_BASE: ghcr.io/${{ github.repository_owner }}/bitcoin-core-docker
	outputs:
	IMAGE: ${{ fromJson(steps.build.outputs.metadata)['image.name'] }}
	steps:
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Login to GHCR
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Generate version
	run: \|
	# Default tag as commit SHA
	VERSION=${GITHUB_SHA::7}
	# Use tag name if it's a tag push
	if [ "$GITHUB_EVENT_NAME" == "push" ] && [ "$GITHUB_REF_TYPE" == "tag" ]; then
	VERSION=${GITHUB_REF_NAME#v}
	fi
	echo "VERSION=$VERSION" >> $GITHUB_ENV

	- name: Build and push
	id: build
	uses: docker/build-push-action@v6
	with:
	platforms: linux/amd64,linux/arm64,linux/arm/v7
	push: true
	provenance: mode=max
	tags: "${{ env.IMAGE_BASE }}:${{ env.VERSION }}"
	cache-from: type=registry,ref=${{ env.IMAGE_BASE }}:buildcache
	cache-to: type=registry,ref=${{ env.IMAGE_BASE }}:buildcache,mode=max

	- name: Attest
	uses: actions/attest-build-provenance@v1
	id: attest
	with:
	subject-name: ${{ env.IMAGE_BASE }}
	subject-digest: ${{ steps.build.outputs.digest }}
	push-to-registry: true

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