initial commit

action.yml

@@ -0,0 +1,46 @@
+name: 'Dockerfile test build'
+description: 'Test build of Dockerfile'
+
+inputs:
+  buildkit_version:
+    description: 'Buildkit version'
+    required: true
+  context:
+    description: 'Build context'
+    required: true
+    default: '.'
+  dockerfile:
+    description: 'Dockerfile name'
+    required: true
+    default: '.'
+
+runs:
+  using: "composite"
+  steps:
+    - name: Prepare buildkit directory
+      shell: bash
+      run: mkdir -p /var/lib/buildkit
+
+    - name: Download buildkit binaries
+      shell: bash
+      run: |
+        [ -f /var/lib/buildkit/buildkit.tar.gz ] || \
+          curl --output /var/lib/buildkit/buildkit.tar.gz \
+          "https://github.com/moby/buildkit/releases/download/${{ inputs.buildkit_version }}/buildkit-${{ inputs.buildkit_version }}.linux-amd64.tar.gz"
+
+    - name: Extract buildkit binaries
+      shell: bash
+      run: |
+        [ -x /var/lib/buildkit/bin/buildkitd ] && \
+        [ -x /var/lib/buildkit/bin/buildctl ] || \
+        tar -xf /var/lib/buildkit/buildkit.tar.gz -C /var/lib/buildkit
+
+    - name: Run buildkit build
+      shell: bash
+      run: |
+        /var/lib/buildkit/bin/buildkitd & \
+        while [ ! -S /run/buildkit/buildkitd.sock ]; do sleep 0.1; done && \
+        /var/lib/buildkit/bin/buildctl build \
+            --frontend=dockerfile.v0 \
+            --local context=${{ inputs.context }} \
+            --local dockerfile=${{ inputs.dockerfile }}