From 65b2e9d1a75d43457a12b76ab9d9b69935a7f024 Mon Sep 17 00:00:00 2001
From: Klemek <klemek.dev@proton.me>
Date: Thu, 30 Apr 2026 14:11:51 +0200
Subject: [PATCH] initial commit

---
 README.md  | 22 ++++++++++++++++++++++
 action.yml | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 README.md
 create mode 100644 action.yml

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..cc35517
--- /dev/null
+++ b/README.md
@@ -0,0 +1,22 @@
+# Dockerfile test build
+
+```yaml
+name: Docker Build CI
+on: [ push ]
+
+env:
+  BUILDKIT_VERSION: 'v0.29.0'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/cache@v4
+        with:
+          path: /var/lib/buildkit
+          key: ${{ runner.os }}-buildkit-${{ env.BUILDKIT_VERSION }}
+      - uses: https://git.klemek.fr/klemek/dockerfile-test-build@v1
+        with:
+          buildkit_version: ${{ env.BUILDKIT_VERSION }}
+```
\ No newline at end of file
diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..4382c6d
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,40 @@
+name: 'Dockerfile test build'
+description: 'Test build of Dockerfile'
+inputs:
+  dockerfile:
+    description: 'Dockerfile name'
+    required: true
+    default: '.'
+  context:
+    description: 'Build context'
+    required: true
+    default: '.'
+  buildkit_version:
+    description: 'Buildkit version'
+    required: true
+runs:
+  using: "composite"
+  steps:
+    - name: Prepare buildkit directory
+      shell: bash
+      run: mkdir -p /var/lib/buildkit
+
+    - name: Download buildkit binaries
+      shell: bash
+      run: |
+        wget -nc -O /var/lib/buildkit/buildkit.tar.gz \
+          https://github.com/moby/buildkit/releases/download/${{ inputs.buildkit_version }}/buildkit-${{ inputs.buildkit_version }}.linux-amd64.tar.gz
+
+    - name: Extract buildkit binaries
+      shell: bash
+      run: tar -xf /var/lib/buildkit/buildkit.tar.gz -C /var/lib/buildkit
+
+    - name: Run buildkit build
+      shell: bash
+      run: |
+        /var/lib/buildkit/bin/buildkitd & \
+        while [ ! -f /run/buildkit/buildkitd.sock ]; do sleep 0.1; done && \
+        /var/lib/buildkit/bin/buildctl build \
+            --frontend=dockerfile.v0 \
+            --local context=${{ inputs.context }} \
+            --local dockerfile=${{ inputs.dockerfile }}
\ No newline at end of file