remove legacy export-build tool support

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

.github/workflows/ci.yml

@@ -1464,35 +1464,6 @@ jobs:
         env:
           DOCKER_BUILD_RECORD_RETENTION_DAYS: ${{ matrix.days }}
 
-  export-legacy:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        legacy:
-          - false
-          - true
-    steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v6
-        with:
-          path: action
-      -
-        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: ./action
-        with:
-          file: ./test/Dockerfile
-        env:
-          DOCKER_BUILD_EXPORT_LEGACY: ${{ matrix.legacy }}
-
   checks:
     runs-on: ubuntu-latest
     strategy:

README.md

@@ -277,7 +277,6 @@ The following outputs are available:
 | `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` |
-| `DOCKER_BUILD_EXPORT_LEGACY`         | Bool   | `false` | If `true`, exports build using legacy export-build tool instead of [`buildx history export` command](https://docs.docker.com/reference/cli/docker/buildx/history/export/)                                                                                          |
 
 ## Troubleshooting
 

src/main.ts

@@ -175,8 +175,8 @@ actionsToolkit.run(
         core.info(`Build summary skipped for ${inputs.call} subrequest`);
       } else if (GitHub.isGHES) {
         core.info('Build summary is not yet supported on GHES');
-      } else if (!(await toolkit.buildx.versionSatisfies('>=0.13.0'))) {
+      } else if (!(await toolkit.buildx.versionSatisfies('>=0.23.0'))) {
-        core.info('Build summary requires Buildx >= 0.13.0');
+        core.info('Build summary requires Buildx >= 0.23.0');
       } else if (!ref) {
         core.info('Build summary requires a build reference');
       } else {
@@ -202,8 +202,7 @@ actionsToolkit.run(
 
           const buildxHistory = new BuildxHistory();
           const exportRes = await buildxHistory.export({
-            refs: stateHelper.buildRef ? [stateHelper.buildRef] : [],
+            refs: stateHelper.buildRef ? [stateHelper.buildRef] : []
-            useContainer: buildExportLegacy()
           });
           core.info(`Build record written to ${exportRes.dockerbuildFilename} (${Util.formatFileSize(exportRes.dockerbuildSize)})`);
 
@@ -298,10 +297,3 @@ function buildRecordRetentionDays(): number | undefined {
     return res;
   }
 }
-
-function buildExportLegacy(): boolean {
-  if (process.env.DOCKER_BUILD_EXPORT_LEGACY) {
-    return Util.parseBool(process.env.DOCKER_BUILD_EXPORT_LEGACY);
-  }
-  return false;
-}