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Merged
nikicat merged 1 commit into from
Jun 23, 2026
Merged

Build and push tag-named images on git tag push #3

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30 changes: 17 additions & 13 deletions .github/workflows/build-image.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ name: build-image
on:
push:
branches: [master]
tags: ['*']
pull_request:
workflow_dispatch:

Expand All @@ -20,6 +21,8 @@ env:
# GHCR image, derived from the repo (e.g. ghcr.io/nikicat/tg-echo-service).
# Assumes the repo owner/name are lowercase, as GHCR requires.
IMAGE: ghcr.io/${{ github.repository }}
# Published tag: the git tag name on a tag push, otherwise "latest" (master).
VERSION: ${{ github.ref_type == 'tag' && github.ref_name || 'latest' }}

jobs:
# Build each architecture natively on its own runner (emulation is not viable
Expand Down Expand Up @@ -52,26 +55,27 @@ jobs:

# Pull request / manual runs: build only, read from cache, never push.
- name: Build image
if: github.event_name != 'push' || github.ref != 'refs/heads/master'
if: github.event_name != 'push'
run: |
make image \
IMAGE="$IMAGE" TAG="${{ matrix.arch }}" \
IMAGE_BUILD_ARGS="--layers --cache-from $IMAGE/buildcache-${{ matrix.arch }}"

# master: build, populate the per-arch cache, and push the per-arch tag
# (image + tools image). The manifest job stitches them into :latest.
# Push events (master branch or a git tag): build, populate the per-arch
# cache, and push the per-arch tag <VERSION>-<arch> (image + tools image).
# The manifest job stitches them into the multi-arch :<VERSION>.
- name: Build and push per-arch image
if: github.event_name == 'push' && github.ref == 'refs/heads/master'
if: github.event_name == 'push'
run: |
make push \
IMAGE="$IMAGE" TAG="${{ matrix.arch }}" \
IMAGE="$IMAGE" TAG="$VERSION-${{ matrix.arch }}" \
IMAGE_BUILD_ARGS="--layers --cache-from $IMAGE/buildcache-${{ matrix.arch }} --cache-to $IMAGE/buildcache-${{ matrix.arch }}"

# Combine the per-arch tags into multi-arch manifests for the image and the
# tools image. Manifests are arch-agnostic metadata, so this runs on amd64.
# Combine the per-arch tags into the multi-arch :<VERSION> manifest for the
# image and the tools image. Manifests are arch-agnostic, so this runs on amd64.
manifest:
needs: build
if: github.event_name == 'push' && github.ref == 'refs/heads/master'
if: github.event_name == 'push'
runs-on: ubuntu-24.04
steps:
- name: Log in to GHCR
Expand All @@ -80,9 +84,9 @@ jobs:
- name: Create and push multi-arch manifests
run: |
for repo in "$IMAGE" "$IMAGE-tools"; do
podman manifest create "$repo:latest"
podman manifest add "$repo:latest" "$repo:amd64"
podman manifest add "$repo:latest" "$repo:arm64"
podman manifest push --all "$repo:latest" "docker://$repo:latest"
podman manifest rm "$repo:latest"
podman manifest create "$repo:$VERSION"
podman manifest add "$repo:$VERSION" "$repo:$VERSION-amd64"
podman manifest add "$repo:$VERSION" "$repo:$VERSION-arm64"
podman manifest push --all "$repo:$VERSION" "docker://$repo:$VERSION"
podman manifest rm "$repo:$VERSION"
done