generate GitHub annotations for build checks

.github/workflows/ci.yml

@@ -1463,3 +1463,51 @@ jobs:
           file: ./test/Dockerfile
         env:
           DOCKER_BUILD_RECORD_RETENTION_DAYS: ${{ matrix.days }}
+
+  checks:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        buildx-version:
+          - latest
+          - v0.14.1
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: ${{ matrix.buildx-version }}
+          driver-opts: |
+            image=${{ inputs.buildkit-image || env.BUILDKIT_IMAGE }}
+      -
+        name: Build
+        uses: ./
+        with:
+          context: ./test
+          file: ./test/lint.Dockerfile
+
+  annotations-disabled:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: ${{ inputs.buildx-version || env.BUILDX_VERSION }}
+          driver-opts: |
+            image=${{ inputs.buildkit-image || env.BUILDKIT_IMAGE }}
+      -
+        name: Build
+        uses: ./
+        with:
+          context: ./test
+          file: ./test/lint.Dockerfile
+        env:
+          DOCKER_BUILD_CHECKS_ANNOTATIONS: false

README.md

@@ -258,6 +258,7 @@ The following outputs are available:
 
 | Name                                 | Type   | Default | Description                                                                                                                                                                                                                                                        |
 |--------------------------------------|--------|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `DOCKER_BUILD_CHECKS_ANNOTATIONS`    | Bool   | `true`  | If `false`, GitHub annotations are not generated for [build checks](https://docs.docker.com/build/checks/)                                                                                                                                                         |
 | `DOCKER_BUILD_SUMMARY`               | Bool   | `true`  | If `false`, [build summary](https://docs.docker.com/build/ci/github-actions/build-summary/) generation is disabled                                                                                                                                                 |
 | `DOCKER_BUILD_RECORD_UPLOAD`         | Bool   | `true`  | If `false`, build record upload as [GitHub artifact](https://docs.github.com/en/actions/using-workflows/storing-workflow-data-as-artifacts) is disabled                                                                                                            |
 | `DOCKER_BUILD_RECORD_RETENTION_DAYS` | Number |         | Duration after which build record artifact will expire in days. Defaults to repository/org [retention settings](https://docs.github.com/en/actions/learn-github-actions/usage-limits-billing-and-administration#artifact-and-log-retention-policy) if unset or `0` |

src/main.ts

@@ -97,7 +97,12 @@ actionsToolkit.run(
 
     let err: Error | undefined;
     await Exec.getExecOutput(buildCmd.command, buildCmd.args, {
-      ignoreReturnCode: true
+      ignoreReturnCode: true,
+      env: Object.assign({}, process.env, {
+        BUILDX_METADATA_WARNINGS: 'true'
+      }) as {
+        [key: string]: string;
+      }
     }).then(res => {
       if (res.stderr.length > 0 && res.exitCode != 0) {
         err = Error(`buildx failed with: ${res.stderr.match(/(.*)\s*$/)?.[0]?.trim() ?? 'unknown error'}`);
@@ -106,7 +111,7 @@ actionsToolkit.run(
 
     const imageID = toolkit.buildxBuild.resolveImageID();
     const metadata = toolkit.buildxBuild.resolveMetadata();
-    const digest = toolkit.buildxBuild.resolveDigest();
+    const digest = toolkit.buildxBuild.resolveDigest(metadata);
     if (imageID) {
       await core.group(`ImageID`, async () => {
         core.info(imageID);
@@ -127,7 +132,7 @@ actionsToolkit.run(
       });
     }
 
-    let ref: string;
+    let ref: string | undefined;
     await core.group(`Reference`, async () => {
       ref = await buildRef(toolkit, startedTime, inputs.builder);
       if (ref) {
@@ -138,6 +143,21 @@ actionsToolkit.run(
       }
     });
 
+    if (buildChecksAnnotationsEnabled()) {
+      const warnings = toolkit.buildxBuild.resolveWarnings(metadata);
+      if (ref && warnings && warnings.length > 0) {
+        const annotations = await Buildx.convertWarningsToGitHubAnnotations(warnings, [ref]);
+        core.debug(`annotations: ${JSON.stringify(annotations, null, 2)}`);
+        if (annotations && annotations.length > 0) {
+          await core.group(`Generating GitHub annotations (${annotations.length} build checks found)`, async () => {
+            for (const annotation of annotations) {
+              core.warning(annotation.message, annotation);
+            }
+          });
+        }
+      }
+    }
+
     await core.group(`Check build summary support`, async () => {
       if (!buildSummaryEnabled()) {
         core.info('Build summary disabled');
@@ -222,6 +242,13 @@ async function buildRef(toolkit: Toolkit, since: Date, builder?: string): Promis
   return Object.keys(refs).length > 0 ? Object.keys(refs)[0] : '';
 }
 
+function buildChecksAnnotationsEnabled(): boolean {
+  if (process.env.DOCKER_BUILD_CHECKS_ANNOTATIONS) {
+    return Util.parseBool(process.env.DOCKER_BUILD_CHECKS_ANNOTATIONS);
+  }
+  return true;
+}
+
 function buildSummaryEnabled(): boolean {
   if (process.env.DOCKER_BUILD_NO_SUMMARY) {
     core.warning('DOCKER_BUILD_NO_SUMMARY is deprecated. Set DOCKER_BUILD_SUMMARY to false instead.');

test/lint.Dockerfile

@@ -0,0 +1,12 @@
+frOM busybox as base
+cOpy lint.Dockerfile .
+
+from scratch
+MAINTAINER [email protected]
+COPy --from=base \
+  /lint.Dockerfile \
+  /
+
+CMD [ "echo", "Hello, Norway!" ]
+CMD [ "echo", "Hello, Sweden!" ]
+ENTRYPOINT my-program start