mark buildx >= 0.20.0 as incompatible with docker/bake-action < v6

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

Author: crazy-max

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ on:
       - 'subaction/**'
 
 env:
-  BUILDX_VERSION: latest
+  BUILDX_VERSION: v0.18.0
   BUILDKIT_IMAGE: moby/buildkit:buildx-stable-1
 
 jobs:
@@ -153,6 +153,11 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v4
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: ${{ inputs.buildx-version || env.BUILDX_VERSION }}
       -
         name: Build
         uses: ./
@@ -522,3 +527,31 @@ jobs:
         name: Check docker
         run: |
           docker image inspect localhost:5000/name/app:latest
+
+  error-buildx-latest:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: v0.20.0
+      -
+        name: Build
+        id: bake
+        continue-on-error: true
+        uses: ./
+        with:
+          files: |
+            ./test/config.hcl
+      -
+        name: Check
+        run: |
+          echo "${{ toJson(steps.bake) }}"
+          if [ "${{ steps.bake.outcome }}" != "failure" ] || [ "${{ steps.bake.conclusion }}" != "success" ]; then
+            echo "::error::Should have failed"
+            exit 1
+          fi

src/main.ts

@@ -20,6 +20,10 @@ actionsToolkit.run(
   async () => {
     const inputs: context.Inputs = await context.getInputs();
     const toolkit = new Toolkit();
+    if (await toolkit.buildx.versionSatisfies('>=0.20.0')) {
+      throw new Error('docker/bake-action < v6 is not compatible with buildx >= 0.20.0, please update your workflow to latest docker/bake-action or use an older buildx version.');
+    }
+
     const gitAuthToken = process.env.BUILDX_BAKE_GIT_AUTH_TOKEN ?? inputs['github-token'];
 
     await core.group(`GitHub Actions runtime token ACs`, async () => {