Merge pull request #71 from crazy-max/remove-limitation

Remove os limitation

.dockerignore

@@ -0,0 +1,2 @@
+/coverage
+/node_modules

.github/CONTRIBUTING.md

@@ -2,35 +2,24 @@
 
 Hi there! We're thrilled that you'd like to contribute to this project. Your help is essential for keeping it great.
 
-Contributions to this project are [released](https://help.github.com/articles/github-terms-of-service/#6-contributions-under-repository-license) to the public under the [project's open source license](LICENSE).
+Contributions to this project are [released](https://docs.github.com/en/github/site-policy/github-terms-of-service#6-contributions-under-repository-license)
+to the public under the [project's open source license](LICENSE).
 
 ## Submitting a pull request
 
 1. [Fork](https://github.com/docker/setup-buildx-action/fork) and clone the repository
 2. Configure and install the dependencies: `yarn install`
 3. Create a new branch: `git checkout -b my-branch-name`
-4. Make your change, add tests, and make sure the tests still pass
-5. Run pre-checkin: `yarn run pre-checkin`
-6. Push to your fork and [submit a pull request](https://github.com/docker/setup-buildx-action/compare)
-7. Pat yourself on the back and wait for your pull request to be reviewed and merged.
-
-## Container based developer flow
-
-If you don't want to maintain a Node developer environment that fits this project you can use containerized commands instead of invoking yarn directly.
-
-```
-# format code and build javascript artifacts
-docker buildx bake pre-checkin
-
-# validate all code has correctly formatted and built
-docker buildx bake validate
-
-# run tests
-docker buildx bake test
-```
+4. Make your changes
+5. Make sure the tests pass: `docker buildx bake test`
+6. Format code and build javascript artifacts: `docker buildx bake pre-checkin`
+7. Validate all code has correctly formatted and built: `docker buildx bake validate`
+8. Push to your fork and [submit a pull request](https://github.com/docker/setup-buildx-action/compare)
+9. Pat your self on the back and wait for your pull request to be reviewed and merged.
 
 Here are a few things you can do that will increase the likelihood of your pull request being accepted:
 
+- Write tests.
 - Make sure the `README.md` and any other relevant **documentation are kept up-to-date**.
 - We try to follow [SemVer v2.0.0](https://semver.org/). Randomly breaking public APIs is not an option.
 - Keep your change as focused as possible. If there are multiple changes you would like to make that are not dependent upon each other, consider submitting them as **separate pull requests**.
@@ -39,5 +28,5 @@ Here are a few things you can do that will increase the likelihood of your pull
 ## Resources
 
 - [How to Contribute to Open Source](https://opensource.guide/how-to-contribute/)
-- [Using Pull Requests](https://help.github.com/articles/about-pull-requests/)
-- [GitHub Help](https://help.github.com)
+- [Using Pull Requests](https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/about-pull-requests)
+- [GitHub Help](https://docs.github.com/en)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -30,4 +30,5 @@ about: Create a report to help us improve
 
 ### Logs
 
-> Download the [log file of your build](https://help.github.com/en/actions/configuring-and-managing-workflows/managing-a-workflow-run#downloading-logs) and [attach it](https://help.github.com/en/github/managing-your-work-on-github/file-attachments-on-issues-and-pull-requests) to this issue.
+> Download the [log file of your build](https://docs.github.com/en/actions/managing-workflow-runs/using-workflow-run-logs#downloading-logs)
+> and [attach it](https://docs.github.com/en/github/managing-your-work-on-github/file-attachments-on-issues-and-pull-requests) to this issue.

.github/labels.yml

@@ -1,77 +0,0 @@
-## more info https://github.com/crazy-max/ghaction-github-labeler
-- # automerge
-  name: ":bell: automerge"
-  color: "8f4fbc"
-  description: ""
-- # bot
-  name: ":robot: bot"
-  color: "69cde9"
-  description: ""
-- # bug
-  name: ":bug: bug"
-  color: "b60205"
-  description: ""
-- # dependencies
-  name: ":game_die: dependencies"
-  color: "0366d6"
-  description: ""
-- # documentation
-  name: ":memo: documentation"
-  color: "c5def5"
-  description: ""
-- # duplicate
-  name: ":busts_in_silhouette: duplicate"
-  color: "cccccc"
-  description: ""
-- # enhancement
-  name: ":sparkles: enhancement"
-  color: "0054ca"
-  description: ""
-- # feature request
-  name: ":bulb: feature request"
-  color: "0e8a16"
-  description: ""
-- # feedback
-  name: ":mega: feedback"
-  color: "03a9f4"
-  description: ""
-- # future maybe
-  name: ":rocket: future maybe"
-  color: "fef2c0"
-  description: ""
-- # good first issue
-  name: ":hatching_chick: good first issue"
-  color: "7057ff"
-  description: ""
-- # help wanted
-  name: ":pray: help wanted"
-  color: "4caf50"
-  description: ""
-- # hold
-  name: ":hand: hold"
-  color: "24292f"
-  description: ""
-- # invalid
-  name: ":no_entry_sign: invalid"
-  color: "e6e6e6"
-  description: ""
-- # maybe bug
-  name: ":interrobang: maybe bug"
-  color: "ff5722"
-  description: ""
-- # needs more info
-  name: ":thinking: needs more info"
-  color: "795548"
-  description: ""
-- # question
-  name: ":question: question"
-  color: "3f51b5"
-  description: ""
-- # upstream
-  name: ":eyes: upstream"
-  color: "fbca04"
-  description: ""
-- # wontfix
-  name: ":coffin: wontfix"
-  color: "ffffff"
-  description: ""

.github/workflows/ci.yml

@@ -1,18 +1,18 @@
 name: ci
 
 on:
+  schedule:
+    - cron: '0 10 * * *' # everyday at 10am
   push:
     branches:
-      - master
-      - releases/v*
-    paths-ignore:
-      - "**.md"
+      - 'master'
+      - 'releases/v*'
+    tags:
+      - 'v*'
   pull_request:
     branches:
-      - master
-      - releases/v*
-    paths-ignore:
-      - "**.md"
+      - 'master'
+      - 'releases/v*'
 
 jobs:
   main:
@@ -35,11 +35,13 @@ jobs:
         with:
           version: ${{ matrix.buildx-version }}
       -
-        name: Builder instance name
-        run: echo ${{ steps.buildx.outputs.name }}
-      -
-        name: Available platforms
-        run: echo ${{ steps.buildx.outputs.platforms }}
+        name: Inspect builder
+        run: |
+          echo "Name:      ${{ steps.buildx.outputs.name }}"
+          echo "Endpoint:  ${{ steps.buildx.outputs.endpoint }}"
+          echo "Status:    ${{ steps.buildx.outputs.status }}"
+          echo "Flags:     ${{ steps.buildx.outputs.flags }}"
+          echo "Platforms: ${{ steps.buildx.outputs.platforms }}"
       -
         name: Dump context
         uses: crazy-max/ghaction-dump-context@v1
@@ -55,15 +57,81 @@ jobs:
         id: buildx1
         uses: ./
       -
-        name: Builder 1 instance name
-        run: echo ${{ steps.buildx1.outputs.name }}
+        name: Inspect builder 1
+        run: |
+          echo "Name:      ${{ steps.buildx1.outputs.name }}"
+          echo "Endpoint:  ${{ steps.buildx1.outputs.endpoint }}"
+          echo "Status:    ${{ steps.buildx1.outputs.status }}"
+          echo "Flags:     ${{ steps.buildx1.outputs.flags }}"
+          echo "Platforms: ${{ steps.buildx1.outputs.platforms }}"
       -
         name: Set up Docker Buildx 2
         id: buildx2
         uses: ./
       -
-        name: Builder 2 instance name
-        run: echo ${{ steps.buildx2.outputs.name }}
+        name: Inspect builder 2
+        run: |
+          echo "Name:      ${{ steps.buildx2.outputs.name }}"
+          echo "Endpoint:  ${{ steps.buildx2.outputs.endpoint }}"
+          echo "Status:    ${{ steps.buildx2.outputs.status }}"
+          echo "Flags:     ${{ steps.buildx2.outputs.flags }}"
+          echo "Platforms: ${{ steps.buildx2.outputs.platforms }}"
+
+  error:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Stop docker
+        run: |
+          sudo systemctl stop docker
+      -
+        name: Set up Docker Buildx
+        id: buildx
+        continue-on-error: true
+        uses: ./
+      -
+        name: Check
+        run: |
+          echo "${{ toJson(steps.buildx) }}"
+          if [ "${{ steps.buildx.outcome }}" != "failure" ] || [ "${{ steps.buildx.conclusion }}" != "success" ]; then
+            echo "::error::Should have failed"
+            exit 1
+          fi
+      -
+        name: Dump context
+        if: always()
+        uses: crazy-max/ghaction-dump-context@v1
+
+  debug:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Create Dockerfile
+        run: |
+          cat > ./Dockerfile <<EOL
+          FROM alpine
+          RUN uname -a
+          EOL
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: ./
+        with:
+          buildkitd-flags: --debug
+      -
+        name: Build
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64,linux/ppc64le
 
   install:
     runs-on: ubuntu-latest
@@ -176,6 +244,38 @@ jobs:
         with:
           endpoint: mycontext
 
+  config:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Create buildkitd conf
+        run: |
+          cat > /tmp/buildkitd.toml <<EOL
+          debug = true
+          [registry."docker.io"]
+            mirrors = ["mirror.gcr.io"]
+          EOL
+      -
+        name: Create Dockerfile
+        run: |
+          cat > ./Dockerfile <<EOL
+          FROM alpine
+          EOL
+      -
+        name: Set up Docker Buildx
+        uses: ./
+        with:
+          buildkitd-flags: --debug
+          config: /tmp/buildkitd.toml
+      -
+        name: Build
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+
   with-qemu:
     runs-on: ubuntu-latest
     strategy:
@@ -204,8 +304,10 @@ jobs:
         with:
           version: ${{ matrix.buildx-version }}
       -
-        name: Available platforms
-        run: echo ${{ steps.buildx.outputs.platforms }}
-      -
-        name: Builder instance name
-        run: echo ${{ steps.buildx.outputs.name }}
+        name: Inspect builder
+        run: |
+          echo "Name:      ${{ steps.buildx.outputs.name }}"
+          echo "Endpoint:  ${{ steps.buildx.outputs.endpoint }}"
+          echo "Status:    ${{ steps.buildx.outputs.status }}"
+          echo "Flags:     ${{ steps.buildx.outputs.flags }}"
+          echo "Platforms: ${{ steps.buildx.outputs.platforms }}"

.github/workflows/labels.yml

@@ -1,20 +0,0 @@
-name: labels
-
-on:
-  push:
-    branches:
-      - 'master'
-    paths:
-      - '.github/labels.yml'
-      - '.github/workflows/labels.yml'
-
-jobs:
-  labeler:
-    runs-on: ubuntu-latest
-    steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v2
-      -
-        name: Run Labeler
-        uses: crazy-max/ghaction-github-labeler@v3

.github/workflows/test.yml

@@ -3,28 +3,14 @@ name: test
 on:
   push:
     branches:
-      - master
-      - releases/v*
-    paths-ignore:
-      - "**.md"
+      - 'master'
+      - 'releases/v*'
   pull_request:
-    paths-ignore:
-      - "**.md"
+    branches:
+      - 'master'
+      - 'releases/v*'
 
 jobs:
-  test-containerized:
-    runs-on: ubuntu-latest
-    steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v2
-      -
-        name: Validate
-        run: docker buildx bake validate
-      -
-        name: Test
-        run: docker buildx bake test
-
   test:
     runs-on: ubuntu-latest
     steps:
@@ -32,15 +18,20 @@ jobs:
         name: Checkout
         uses: actions/checkout@v2
       -
-        name: Install
-        run: yarn install
+        name: Validate
+        uses: docker/bake-action@v1
+        with:
+          targets: validate
+      -
+        name: Set up Docker Buildx
+        uses: ./
       -
         name: Test
-        run: yarn run test
+        uses: docker/bake-action@v1
+        with:
+          targets: test
       -
         name: Upload coverage
         uses: codecov/codecov-action@v1
-        if: success()
         with:
-          token: ${{ secrets.CODECOV_TOKEN }}
           file: ./coverage/clover.xml

Dockerfile

@@ -1,52 +0,0 @@
-#syntax=docker/dockerfile:1.1-experimental
-
-FROM node:14 AS deps
-WORKDIR /src
-COPY package.json yarn.lock ./
-RUN --mount=type=cache,target=/usr/local/share/.cache/yarn \
-  yarn install
-
-FROM scratch AS update-yarn
-COPY --from=deps /src/yarn.lock /
-
-FROM deps AS validate-yarn
-COPY .git .git
-RUN status=$(git status --porcelain -- yarn.lock); if [ -n "$status" ]; then echo $status; exit 1; fi
-
-FROM deps AS base
-COPY . .
-
-FROM base AS build
-RUN yarn build
-
-FROM deps AS test
-COPY --from=docker /usr/local/bin/docker /usr/bin/
-ARG TARGETOS
-ARG TARGETARCH
-ARG BUILDX_VERSION=v0.4.2
-ENV RUNNER_TEMP=/tmp/github_runner
-ENV RUNNER_TOOL_CACHE=/tmp/github_tool_cache
-RUN mkdir -p /usr/local/lib/docker/cli-plugins && \
-  curl -fsSL https://github.com/docker/buildx/releases/download/$BUILDX_VERSION/buildx-$BUILDX_VERSION.$TARGETOS-$TARGETARCH > /usr/local/lib/docker/cli-plugins/docker-buildx && \
-  chmod +x /usr/local/lib/docker/cli-plugins/docker-buildx && \
-  docker buildx version
-COPY . .
-RUN yarn run test
-
-FROM base AS run-format
-RUN yarn run format
-
-FROM scratch AS format
-COPY --from=run-format /src/src/*.ts /src/
-
-FROM base AS validate-format
-RUN yarn run format-check
-
-FROM scratch AS dist
-COPY --from=build /src/dist/ /dist/
-
-FROM build AS validate-build
-RUN status=$(git status --porcelain -- dist); if [ -n "$status" ]; then echo $status; exit 1; fi
-
-FROM base AS dev
-ENTRYPOINT ["bash"]

README.md

@@ -8,10 +8,10 @@
 
 GitHub Action to set up Docker [Buildx](https://github.com/docker/buildx).
 
-> :bulb: See also:
-> * [login](https://github.com/docker/login-action) action
-> * [setup-qemu](https://github.com/docker/setup-qemu-action) action
-> * [build-push](https://github.com/docker/build-push-action) action
+This action will create and boot a builder that can be used in the following steps of your workflow if you're using
+[buildx](https://github.com/docker/buildx). By default, the `docker-container` [builder driver](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#driver)
+will be used to be able to build multi-platform images and export cache thanks to the [BuildKit](https://github.com/moby/buildkit)
+container.
 
 ![Screenshot](.github/setup-buildx-action.png)
 
@@ -25,8 +25,9 @@ ___
   * [inputs](#inputs)
   * [outputs](#outputs)
   * [environment variables](#environment-variables)
+* [Notes](#notes)
+  * [BuildKit container logs](#buildkit-container-logs)
 * [Keep up-to-date with GitHub Dependabot](#keep-up-to-date-with-github-dependabot)
-* [Limitation](#limitation)
 
 ## Usage
 
@@ -50,11 +51,13 @@ jobs:
         id: buildx
         uses: docker/setup-buildx-action@v1
       -
-        name: Builder instance name
-        run: echo ${{ steps.buildx.outputs.name }}
-      -
-        name: Available platforms
-        run: echo ${{ steps.buildx.outputs.platforms }}
+        name: Inspect builder
+        run: |
+          echo "Name:      ${{ steps.buildx.outputs.name }}"
+          echo "Endpoint:  ${{ steps.buildx.outputs.endpoint }}"
+          echo "Status:    ${{ steps.buildx.outputs.status }}"
+          echo "Flags:     ${{ steps.buildx.outputs.flags }}"
+          echo "Platforms: ${{ steps.buildx.outputs.platforms }}"
 ```
 
 ### With QEMU
@@ -123,12 +126,13 @@ Following inputs can be used as `step.with` keys
 | Name               | Type    | Description                       |
 |--------------------|---------|-----------------------------------|
 | `version`          | String  | [Buildx](https://github.com/docker/buildx) version. (eg. `v0.3.0`, `latest`) |
-| `driver`           | String  | Sets the [builder driver](https://github.com/docker/buildx#--driver-driver) to be used (default `docker-container`) |
-| `driver-opts`      | CSV     | List of additional [driver-specific options](https://github.com/docker/buildx#--driver-opt-options) (eg. `image=moby/buildkit:master`) |
+| `driver`           | String  | Sets the [builder driver](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#driver) to be used (default `docker-container`) |
+| `driver-opts`      | CSV     | List of additional [driver-specific options](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#driver-opt) (eg. `image=moby/buildkit:master`) |
 | `buildkitd-flags`  | String  | [Flags for buildkitd](https://github.com/moby/buildkit/blob/master/docs/buildkitd.toml.md) daemon (since [buildx v0.3.0](https://github.com/docker/buildx/releases/tag/v0.3.0)) |
 | `install`          | Bool    | Sets up `docker build` command as an alias to `docker buildx` (default `false`) |
 | `use`              | Bool    | Switch to this builder instance (default `true`) |
-| `endpoint`         | String  | [Optional address for docker socket](https://github.com/docker/buildx#buildx-create-options-contextendpoint) or context from `docker context ls` |
+| `endpoint`         | String  | [Optional address for docker socket](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#description) or context from `docker context ls` |
+| `config`           | String  | [BuildKit config file](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#config) |
 
 > `CSV` type must be a newline-delimited string
 > ```yaml
@@ -146,8 +150,12 @@ Following outputs are available
 
 | Name          | Type    | Description                           |
 |---------------|---------|---------------------------------------|
-| `name`        | String  | Builder instance name |
-| `platforms`   | String  | Available platforms (comma separated) |
+| `name`        | String  | Builder name |
+| `driver`      | String  | Builder driver |
+| `endpoint`    | String  | Builder node endpoint |
+| `status`      | String  | Builder node status |
+| `flags`       | String  | Builder node flags (if applicable) |
+| `platforms`   | String  | Builder node platforms available (comma separated) |
 
 ### environment variables
 
@@ -157,6 +165,25 @@ The following [official docker environment variables](https://docs.docker.com/en
 |-----------------|---------|-------------|-------------------------------------------------|
 | `DOCKER_CONFIG` | String  | `~/.docker` | The location of your client configuration files |
 
+## Notes
+
+### BuildKit container logs
+
+To display BuildKit container logs (when `docker-container` driver is used) you have to [enable step debug logging](https://docs.github.com/en/actions/managing-workflow-runs/enabling-debug-logging#enabling-step-debug-logging)
+or you can also enable debugging in the [setup-buildx action step](https://github.com/docker/setup-buildx-action):
+
+```yaml
+  -
+    name: Set up Docker Buildx
+    uses: docker/setup-buildx-action@v1
+    with:
+      buildkitd-flags: --debug
+```
+
+Logs will be available at the end of a job:
+
+![BuildKit container logs](.github/buildkit-container-logs.png)
+
 ## Keep up-to-date with GitHub Dependabot
 
 Since [Dependabot](https://docs.github.com/en/github/administering-a-repository/keeping-your-actions-up-to-date-with-github-dependabot)
@@ -172,7 +199,3 @@ updates:
     schedule:
       interval: "daily"
 ```
-
-## Limitation
-
-This action is only available for Linux [virtual environments](https://docs.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners#supported-virtual-environments-and-hardware-resources).

__tests__/buildx.test.ts

@@ -25,17 +25,19 @@ describe('parseVersion', () => {
   });
 });
 
-describe('platforms', () => {
+describe('inspect', () => {
   async function isDaemonRunning() {
     return await docker.isDaemonRunning();
   }
   (isDaemonRunning() ? it : it.skip)(
     'valid',
     async () => {
-      const platforms = buildx.platforms();
-      console.log(`platforms: ${platforms}`);
-      expect(platforms).not.toBeUndefined();
-      expect(platforms).not.toEqual('');
+      const builder = await buildx.inspect('');
+      console.log('builder', builder);
+      expect(builder).not.toBeUndefined();
+      expect(builder.name).not.toEqual('');
+      expect(builder.driver).not.toEqual('');
+      expect(builder.node_platforms).not.toEqual('');
     },
     100000
   );

__tests__/context.test.ts

@@ -1,3 +1,4 @@
+import * as os from 'os';
 import * as context from '../src/context';
 
 describe('getInputList', () => {
@@ -78,6 +79,27 @@ describe('asyncForEach', () => {
   });
 });
 
+describe('setOutput', () => {
+  beforeEach(() => {
+    process.stdout.write = jest.fn();
+  });
+
+  it('setOutput produces the correct command', () => {
+    context.setOutput('some output', 'some value');
+    assertWriteCalls([`::set-output name=some output::some value${os.EOL}`]);
+  });
+
+  it('setOutput handles bools', () => {
+    context.setOutput('some output', false);
+    assertWriteCalls([`::set-output name=some output::false${os.EOL}`]);
+  });
+
+  it('setOutput handles numbers', () => {
+    context.setOutput('some output', 1.01);
+    assertWriteCalls([`::set-output name=some output::1.01${os.EOL}`]);
+  });
+});
+
 // See: https://github.com/actions/toolkit/blob/master/packages/core/src/core.ts#L67
 function getInputName(name: string): string {
   return `INPUT_${name.replace(/ /g, '_').toUpperCase()}`;
@@ -86,3 +108,11 @@ function getInputName(name: string): string {
 function setInput(name: string, value: string): void {
   process.env[getInputName(name)] = value;
 }
+
+// Assert that process.stdout.write calls called only with the given arguments.
+function assertWriteCalls(calls: string[]): void {
+  expect(process.stdout.write).toHaveBeenCalledTimes(calls.length);
+  for (let i = 0; i < calls.length; i++) {
+    expect(process.stdout.write).toHaveBeenNthCalledWith(i + 1, calls[i]);
+  }
+}

action.yml

@@ -32,12 +32,23 @@ inputs:
   endpoint:
     description: 'Optional address for docker socket or context from `docker context ls`'
     required: false
+  config:
+    description: 'BuildKit config file'
+    required: false
 
 outputs:
   name:
-    description: 'Builder instance name'
+    description: 'Builder name'
+  driver:
+    description: 'Builder driver'
+  endpoint:
+    description: 'Builder node endpoint'
+  status:
+    description: 'Builder node status'
+  flags:
+    description: 'Builder node flags (if applicable)'
   platforms:
-    description: 'Available platforms (comma separated)'
+    description: 'Builder node platforms available (comma separated)'
 
 runs:
   using: 'node12'

dist/index.js

@@ -519,26 +519,27 @@ const context = __importStar(__webpack_require__(842));
 const mexec = __importStar(__webpack_require__(757));
 const stateHelper = __importStar(__webpack_require__(647));
 function run() {
+    var _a;
     return __awaiter(this, void 0, void 0, function* () {
         try {
-            if (os.platform() !== 'linux') {
-                core.setFailed('Only supported on linux platform');
-                return;
-            }
+            core.startGroup(`Docker info`);
+            yield exec.exec('docker', ['version']);
+            yield exec.exec('docker', ['info']);
+            core.endGroup();
             const inputs = yield context.getInputs();
             const dockerConfigHome = process.env.DOCKER_CONFIG || path.join(os.homedir(), '.docker');
             if (!(yield buildx.isAvailable()) || inputs.version) {
-                core.startGroup(`👉 Installing Buildx`);
+                core.startGroup(`Installing buildx`);
                 yield buildx.install(inputs.version || 'latest', dockerConfigHome);
                 core.endGroup();
             }
             const buildxVersion = yield buildx.getVersion();
-            core.info(`📣 Buildx version: ${buildxVersion}`);
+            core.info(`Using buildx ${buildxVersion}`);
             const builderName = inputs.driver == 'docker' ? 'default' : `builder-${__webpack_require__(840).v4()}`;
-            core.setOutput('name', builderName);
+            context.setOutput('name', builderName);
             stateHelper.setBuilderName(builderName);
             if (inputs.driver !== 'docker') {
-                core.startGroup(`🔨 Creating a new builder instance`);
+                core.startGroup(`Creating a new builder instance`);
                 let createArgs = ['buildx', 'create', '--name', builderName, '--driver', inputs.driver];
                 if (semver.satisfies(buildxVersion, '>=0.3.0')) {
                     yield context.asyncForEach(inputs.driverOpts, (driverOpt) => __awaiter(this, void 0, void 0, function* () {
@@ -554,9 +555,12 @@ function run() {
                 if (inputs.endpoint) {
                     createArgs.push(inputs.endpoint);
                 }
+                if (inputs.config) {
+                    createArgs.push('--config', inputs.config);
+                }
                 yield exec.exec('docker', createArgs);
                 core.endGroup();
-                core.startGroup(`🏃 Booting builder`);
+                core.startGroup(`Booting builder`);
                 let bootstrapArgs = ['buildx', 'inspect', '--bootstrap'];
                 if (semver.satisfies(buildxVersion, '>=0.4.0')) {
                     bootstrapArgs.push('--builder', builderName);
@@ -565,15 +569,25 @@ function run() {
                 core.endGroup();
             }
             if (inputs.install) {
-                core.startGroup(`🤝 Setting buildx as default builder`);
+                core.startGroup(`Setting buildx as default builder`);
                 yield exec.exec('docker', ['buildx', 'install']);
                 core.endGroup();
             }
-            core.startGroup(`🛒 Extracting available platforms`);
-            const platforms = yield buildx.platforms();
-            core.info(`${platforms}`);
-            core.setOutput('platforms', platforms);
+            core.startGroup(`Inspect builder`);
+            const builder = yield buildx.inspect(builderName);
+            core.info(JSON.stringify(builder, undefined, 2));
+            context.setOutput('driver', builder.driver);
+            context.setOutput('endpoint', builder.node_endpoint);
+            context.setOutput('status', builder.node_status);
+            context.setOutput('flags', builder.node_flags);
+            context.setOutput('platforms', builder.node_platforms);
             core.endGroup();
+            if (inputs.driver == 'docker-container') {
+                stateHelper.setContainerName(`buildx_buildkit_${builder.node_name}`);
+            }
+            if (core.isDebug() || ((_a = builder.node_flags) === null || _a === void 0 ? void 0 : _a.includes('--debug'))) {
+                stateHelper.setDebug('true');
+            }
         }
         catch (error) {
             core.setFailed(error.message);
@@ -582,14 +596,24 @@ function run() {
 }
 function cleanup() {
     return __awaiter(this, void 0, void 0, function* () {
-        if (stateHelper.builderName.length == 0) {
-            return;
+        if (stateHelper.IsDebug && stateHelper.containerName.length > 0) {
+            core.startGroup(`BuildKit container logs`);
+            yield mexec.exec('docker', ['logs', `${stateHelper.containerName}`], false).then(res => {
+                if (res.stderr != '' && !res.success) {
+                    core.warning(res.stderr);
+                }
+            });
+            core.endGroup();
+        }
+        if (stateHelper.builderName.length > 0) {
+            core.startGroup(`Removing builder`);
+            yield mexec.exec('docker', ['buildx', 'rm', `${stateHelper.builderName}`], false).then(res => {
+                if (res.stderr != '' && !res.success) {
+                    core.warning(res.stderr);
+                }
+            });
+            core.endGroup();
         }
-        yield mexec.exec('docker', ['buildx', 'rm', `${stateHelper.builderName}`], false).then(res => {
-            if (res.stderr != '' && !res.success) {
-                core.warning(res.stderr);
-            }
-        });
     });
 }
 if (!stateHelper.IsPost) {
@@ -1484,6 +1508,7 @@ exports.getInput = getInput;
  */
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 function setOutput(name, value) {
+    process.stdout.write(os.EOL);
     command_1.issueCommand('set-output', { name }, value);
 }
 exports.setOutput = setOutput;
@@ -2122,7 +2147,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.install = exports.platforms = exports.isAvailable = exports.parseVersion = exports.getVersion = void 0;
+exports.install = exports.inspect = exports.isAvailable = exports.parseVersion = exports.getVersion = void 0;
 const fs = __importStar(__webpack_require__(747));
 const path = __importStar(__webpack_require__(622));
 const semver = __importStar(__webpack_require__(383));
@@ -2164,28 +2189,63 @@ function isAvailable() {
     });
 }
 exports.isAvailable = isAvailable;
-function platforms() {
+function inspect(name) {
     return __awaiter(this, void 0, void 0, function* () {
-        return yield exec.exec(`docker`, ['buildx', 'inspect'], true).then(res => {
+        return yield exec.exec(`docker`, ['buildx', 'inspect', name], true).then(res => {
             if (res.stderr != '' && !res.success) {
                 throw new Error(res.stderr);
             }
-            for (const line of res.stdout.trim().split(`\n`)) {
-                if (line.startsWith('Platforms')) {
-                    return line.replace('Platforms: ', '').replace(/\s/g, '').trim();
+            const builder = {};
+            itlines: for (const line of res.stdout.trim().split(`\n`)) {
+                const [key, ...rest] = line.split(':');
+                const value = rest.map(v => v.trim()).join(':');
+                if (key.length == 0 || value.length == 0) {
+                    continue;
+                }
+                switch (key) {
+                    case 'Name': {
+                        if (builder.name == undefined) {
+                            builder.name = value;
+                        }
+                        else {
+                            builder.node_name = value;
+                        }
+                        break;
+                    }
+                    case 'Driver': {
+                        builder.driver = value;
+                        break;
+                    }
+                    case 'Endpoint': {
+                        builder.node_endpoint = value;
+                        break;
+                    }
+                    case 'Status': {
+                        builder.node_status = value;
+                        break;
+                    }
+                    case 'Flags': {
+                        builder.node_flags = value;
+                        break;
+                    }
+                    case 'Platforms': {
+                        builder.node_platforms = value.replace(/\s/g, '');
+                        break itlines;
+                    }
                 }
             }
+            return builder;
         });
     });
 }
-exports.platforms = platforms;
+exports.inspect = inspect;
 function install(inputVersion, dockerConfigHome) {
     return __awaiter(this, void 0, void 0, function* () {
         const release = yield github.getRelease(inputVersion);
         if (!release) {
             throw new Error(`Cannot find buildx ${inputVersion} release`);
         }
-        core.debug(`Release found: ${release.tag_name}`);
+        core.debug(`Release ${release.tag_name} found`);
         const version = release.tag_name.replace(/^v+|v+$/g, '');
         let toolPath;
         toolPath = tc.find('buildx', version);
@@ -2205,7 +2265,7 @@ function install(inputVersion, dockerConfigHome) {
         const pluginPath = path.join(pluginsDir, filename);
         core.debug(`Plugin path is ${pluginPath}`);
         fs.copyFileSync(path.join(toolPath, filename), pluginPath);
-        core.info('🔨 Fixing perms...');
+        core.info('Fixing perms');
         fs.chmodSync(pluginPath, '0755');
         return pluginPath;
     });
@@ -2217,7 +2277,7 @@ function download(version) {
         const downloadUrl = util.format('https://github.com/docker/buildx/releases/download/v%s/%s', version, yield filename(version));
         let downloadPath;
         try {
-            core.info(`⬇️ Downloading ${downloadUrl}...`);
+            core.info(`Downloading ${downloadUrl}`);
             downloadPath = yield tc.downloadTool(downloadUrl);
             core.debug(`Downloaded to ${downloadPath}`);
         }
@@ -5580,14 +5640,24 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.setBuilderName = exports.builderName = exports.IsPost = void 0;
+exports.setContainerName = exports.setBuilderName = exports.setDebug = exports.containerName = exports.builderName = exports.IsDebug = exports.IsPost = void 0;
 const core = __importStar(__webpack_require__(186));
 exports.IsPost = !!process.env['STATE_isPost'];
+exports.IsDebug = !!process.env['STATE_isDebug'];
 exports.builderName = process.env['STATE_builderName'] || '';
+exports.containerName = process.env['STATE_containerName'] || '';
+function setDebug(debug) {
+    core.saveState('isDebug', debug);
+}
+exports.setDebug = setDebug;
 function setBuilderName(builderName) {
     core.saveState('builderName', builderName);
 }
 exports.setBuilderName = setBuilderName;
+function setContainerName(containerName) {
+    core.saveState('containerName', containerName);
+}
+exports.setContainerName = setContainerName;
 if (!exports.IsPost) {
     core.saveState('isPost', 'true');
 }
@@ -8007,9 +8077,10 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.asyncForEach = exports.getInputList = exports.getInputs = exports.osArch = exports.osPlat = void 0;
+exports.setOutput = exports.asyncForEach = exports.getInputList = exports.getInputs = exports.osArch = exports.osPlat = void 0;
 const os = __importStar(__webpack_require__(87));
 const core = __importStar(__webpack_require__(186));
+const command_1 = __webpack_require__(351);
 exports.osPlat = os.platform();
 exports.osArch = os.arch();
 function getInputs() {
@@ -8022,7 +8093,8 @@ function getInputs() {
                 '--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host',
             install: /true/i.test(core.getInput('install')),
             use: /true/i.test(core.getInput('use')),
-            endpoint: core.getInput('endpoint')
+            endpoint: core.getInput('endpoint'),
+            config: core.getInput('config')
         };
     });
 }
@@ -8045,6 +8117,11 @@ exports.asyncForEach = (array, callback) => __awaiter(void 0, void 0, void 0, fu
         yield callback(array[index], index, array);
     }
 });
+// FIXME: Temp fix https://github.com/actions/toolkit/issues/777
+function setOutput(name, value) {
+    command_1.issueCommand('set-output', { name }, value);
+}
+exports.setOutput = setOutput;
 //# sourceMappingURL=context.js.map
 
 /***/ }),
@@ -8066,22 +8143,30 @@ module.exports = clean
 /***/ (function(module, __unusedexports, __webpack_require__) {
 
 const Range = __webpack_require__(828)
-const { ANY } = __webpack_require__(532)
+const Comparator = __webpack_require__(532)
+const { ANY } = Comparator
 const satisfies = __webpack_require__(55)
 const compare = __webpack_require__(309)
 
 // Complex range `r1 || r2 || ...` is a subset of `R1 || R2 || ...` iff:
-// - Every simple range `r1, r2, ...` is a subset of some `R1, R2, ...`
+// - Every simple range `r1, r2, ...` is a null set, OR
+// - Every simple range `r1, r2, ...` which is not a null set is a subset of
+//   some `R1, R2, ...`
 //
 // Simple range `c1 c2 ...` is a subset of simple range `C1 C2 ...` iff:
 // - If c is only the ANY comparator
 //   - If C is only the ANY comparator, return true
-//   - Else return false
+//   - Else if in prerelease mode, return false
+//   - else replace c with `[>=0.0.0]`
+// - If C is only the ANY comparator
+//   - if in prerelease mode, return true
+//   - else replace C with `[>=0.0.0]`
 // - Let EQ be the set of = comparators in c
 // - If EQ is more than one, return true (null set)
 // - Let GT be the highest > or >= comparator in c
 // - Let LT be the lowest < or <= comparator in c
 // - If GT and LT, and GT.semver > LT.semver, return true (null set)
+// - If any C is a = range, and GT or LT are set, return false
 // - If EQ
 //   - If GT, and EQ does not satisfy GT, return true (null set)
 //   - If LT, and EQ does not satisfy LT, return true (null set)
@@ -8090,13 +8175,16 @@ const compare = __webpack_require__(309)
 // - If GT
 //   - If GT.semver is lower than any > or >= comp in C, return false
 //   - If GT is >=, and GT.semver does not satisfy every C, return false
+//   - If GT.semver has a prerelease, and not in prerelease mode
+//     - If no C has a prerelease and the GT.semver tuple, return false
 // - If LT
 //   - If LT.semver is greater than any < or <= comp in C, return false
 //   - If LT is <=, and LT.semver does not satisfy every C, return false
-// - If any C is a = range, and GT or LT are set, return false
+//   - If GT.semver has a prerelease, and not in prerelease mode
+//     - If no C has a prerelease and the LT.semver tuple, return false
 // - Else return true
 
-const subset = (sub, dom, options) => {
+const subset = (sub, dom, options = {}) => {
   if (sub === dom)
     return true
 
@@ -8125,8 +8213,21 @@ const simpleSubset = (sub, dom, options) => {
   if (sub === dom)
     return true
 
-  if (sub.length === 1 && sub[0].semver === ANY)
-    return dom.length === 1 && dom[0].semver === ANY
+  if (sub.length === 1 && sub[0].semver === ANY) {
+    if (dom.length === 1 && dom[0].semver === ANY)
+      return true
+    else if (options.includePrerelease)
+      sub = [ new Comparator('>=0.0.0-0') ]
+    else
+      sub = [ new Comparator('>=0.0.0') ]
+  }
+
+  if (dom.length === 1 && dom[0].semver === ANY) {
+    if (options.includePrerelease)
+      return true
+    else
+      dom = [ new Comparator('>=0.0.0') ]
+  }
 
   const eqSet = new Set()
   let gt, lt
@@ -8169,10 +8270,32 @@ const simpleSubset = (sub, dom, options) => {
 
   let higher, lower
   let hasDomLT, hasDomGT
+  // if the subset has a prerelease, we need a comparator in the superset
+  // with the same tuple and a prerelease, or it's not a subset
+  let needDomLTPre = lt &&
+    !options.includePrerelease &&
+    lt.semver.prerelease.length ? lt.semver : false
+  let needDomGTPre = gt &&
+    !options.includePrerelease &&
+    gt.semver.prerelease.length ? gt.semver : false
+  // exception: <1.2.3-0 is the same as <1.2.3
+  if (needDomLTPre && needDomLTPre.prerelease.length === 1 &&
+      lt.operator === '<' && needDomLTPre.prerelease[0] === 0) {
+    needDomLTPre = false
+  }
+
   for (const c of dom) {
     hasDomGT = hasDomGT || c.operator === '>' || c.operator === '>='
     hasDomLT = hasDomLT || c.operator === '<' || c.operator === '<='
     if (gt) {
+      if (needDomGTPre) {
+        if (c.semver.prerelease && c.semver.prerelease.length &&
+            c.semver.major === needDomGTPre.major &&
+            c.semver.minor === needDomGTPre.minor &&
+            c.semver.patch === needDomGTPre.patch) {
+          needDomGTPre = false
+        }
+      }
       if (c.operator === '>' || c.operator === '>=') {
         higher = higherGT(gt, c, options)
         if (higher === c && higher !== gt)
@@ -8181,6 +8304,14 @@ const simpleSubset = (sub, dom, options) => {
         return false
     }
     if (lt) {
+      if (needDomLTPre) {
+        if (c.semver.prerelease && c.semver.prerelease.length &&
+            c.semver.major === needDomLTPre.major &&
+            c.semver.minor === needDomLTPre.minor &&
+            c.semver.patch === needDomLTPre.patch) {
+          needDomLTPre = false
+        }
+      }
       if (c.operator === '<' || c.operator === '<=') {
         lower = lowerLT(lt, c, options)
         if (lower === c && lower !== lt)
@@ -8201,6 +8332,12 @@ const simpleSubset = (sub, dom, options) => {
   if (lt && hasDomGT && !gt && gtltComp !== 0)
     return false
 
+  // we needed a prerelease range in a specific tuple, but didn't get one
+  // then this isn't a subset.  eg >=1.2.3-pre is not a subset of >=1.0.0,
+  // because it includes prereleases in the 1.2.3 tuple
+  if (needDomGTPre || needDomLTPre)
+    return false
+
   return true
 }
 
@@ -8791,7 +8928,9 @@ class HttpClient {
                 maxSockets: maxSockets,
                 keepAlive: this._keepAlive,
                 proxy: {
-                    proxyAuth: `${proxyUrl.username}:${proxyUrl.password}`,
+                    ...((proxyUrl.username || proxyUrl.password) && {
+                        proxyAuth: `${proxyUrl.username}:${proxyUrl.password}`
+                    }),
                     host: proxyUrl.hostname,
                     port: proxyUrl.port
                 }

docker-bake.hcl

@@ -1,42 +1,67 @@
+variable "NODE_VERSION" {
+  default = "12"
+}
+
+target "node-version" {
+  args = {
+    NODE_VERSION = NODE_VERSION
+  }
+}
+
 group "default" {
   targets = ["build"]
 }
 
 group "pre-checkin" {
-  targets = ["update-yarn", "format", "build"]
+  targets = ["vendor-update", "format", "build"]
 }
 
 group "validate" {
-	targets = ["validate-format", "validate-build", "validate-yarn"]
-}
-
-target "update-yarn" {
-  target = "update-yarn"
-  output = ["."]
+  targets = ["format-validate", "build-validate", "vendor-validate"]
 }
 
 target "build" {
-  target = "dist"
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "build-update"
   output = ["."]
 }
 
-target "test" {
-  target = "test"
+target "build-validate" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "build-validate"
 }
 
 target "format" {
-  target = "format"
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "format-update"
   output = ["."]
 }
 
-target "validate-format" {
-  target = "validate-format"
+target "format-validate" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "format-validate"
 }
 
-target "validate-build" {
-  target = "validate-build"
+target "vendor-update" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/vendor.Dockerfile"
+  target = "update"
+  output = ["."]
 }
 
-target "validate-yarn" {
-	target = "validate-yarn"
-}
+target "vendor-validate" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/vendor.Dockerfile"
+  target = "validate"
+}
+
+target "test" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/test.Dockerfile"
+  target = "test-coverage"
+  output = ["./coverage"]
+}

hack/build.Dockerfile

@@ -0,0 +1,42 @@
+# syntax=docker/dockerfile:1.2
+ARG NODE_VERSION
+
+FROM node:${NODE_VERSION}-alpine AS base
+RUN apk add --no-cache cpio findutils git
+WORKDIR /src
+
+FROM base AS deps
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn install
+
+FROM deps AS build
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run build && mkdir /out && cp -Rf dist /out/
+
+FROM scratch AS build-update
+COPY --from=build /out /
+
+FROM build AS build-validate
+RUN --mount=type=bind,target=.,rw \
+  git add -A && cp -rf /out/* .; \
+  if [ -n "$(git status --porcelain -- dist)" ]; then \
+    echo >&2 'ERROR: Build result differs. Please build first with "docker buildx bake build"'; \
+    git status --porcelain -- dist; \
+    exit 1; \
+  fi
+
+FROM deps AS format
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run format \
+  && mkdir /out && find . -name '*.ts' -not -path './node_modules/*' | cpio -pdm /out
+
+FROM scratch AS format-update
+COPY --from=format /out /
+
+FROM deps AS format-validate
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run format-check \

hack/shell

@@ -1,6 +0,0 @@
-#!/usr/bin/env bash
-
-iidfile=$(mktemp -t docker-iidfile.XXXXXXXXXX)
-DOCKER_BUILDKIT=1 docker build --iidfile $iidfile --progress=plain .
-docker run -it --rm $(cat $iidfile)
-docker rmi $(cat $iidfile)

hack/test.Dockerfile

@@ -0,0 +1,23 @@
+# syntax=docker/dockerfile:1.2
+ARG NODE_VERSION
+
+FROM node:${NODE_VERSION}-alpine AS base
+RUN apk add --no-cache git
+WORKDIR /src
+
+FROM base AS deps
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn install
+
+FROM deps AS test
+ENV RUNNER_TEMP=/tmp/github_runner
+ENV RUNNER_TOOL_CACHE=/tmp/github_tool_cache
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  --mount=type=bind,from=crazymax/docker,source=/usr/libexec/docker/cli-plugins/docker-buildx,target=/usr/libexec/docker/cli-plugins/docker-buildx \
+  --mount=type=bind,from=crazymax/docker,source=/usr/local/bin/docker,target=/usr/bin/docker \
+  yarn run test --coverageDirectory=/tmp/coverage
+
+FROM scratch AS test-coverage
+COPY --from=test /tmp/coverage /

hack/vendor.Dockerfile

@@ -0,0 +1,23 @@
+# syntax=docker/dockerfile:1.2
+ARG NODE_VERSION
+
+FROM node:${NODE_VERSION}-alpine AS base
+RUN apk add --no-cache git
+WORKDIR /src
+
+FROM base AS vendored
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn install && mkdir /out && cp yarn.lock /out
+
+FROM scratch AS update
+COPY --from=vendored /out /
+
+FROM vendored AS validate
+RUN --mount=type=bind,target=.,rw \
+  git add -A && cp -rf /out/* .; \
+  if [ -n "$(git status --porcelain -- yarn.lock)" ]; then \
+    echo >&2 'ERROR: Vendor result differs. Please vendor your package with "docker buildx bake vendor-update"'; \
+    git status --porcelain -- yarn.lock; \
+    exit 1; \
+  fi

package.json

@@ -27,11 +27,11 @@
   ],
   "license": "Apache-2.0",
   "dependencies": {
-    "@actions/core": "^1.2.6",
+    "@actions/core": "^1.2.7",
     "@actions/exec": "^1.0.4",
-    "@actions/http-client": "^1.0.9",
+    "@actions/http-client": "^1.0.11",
     "@actions/tool-cache": "^1.6.1",
-    "semver": "^7.3.4",
+    "semver": "^7.3.5",
     "uuid": "^8.3.2"
   },
   "devDependencies": {

src/buildx.ts

@@ -8,6 +8,16 @@ import * as github from './github';
 import * as core from '@actions/core';
 import * as tc from '@actions/tool-cache';
 
+export type Builder = {
+  name?: string;
+  driver?: string;
+  node_name?: string;
+  node_endpoint?: string;
+  node_status?: string;
+  node_flags?: string;
+  node_platforms?: string;
+};
+
 export async function getVersion(): Promise<string> {
   return await exec.exec(`docker`, ['buildx', 'version'], true).then(res => {
     if (res.stderr != '' && !res.success) {
@@ -34,16 +44,50 @@ export async function isAvailable(): Promise<Boolean> {
   });
 }
 
-export async function platforms(): Promise<String | undefined> {
-  return await exec.exec(`docker`, ['buildx', 'inspect'], true).then(res => {
+export async function inspect(name: string): Promise<Builder> {
+  return await exec.exec(`docker`, ['buildx', 'inspect', name], true).then(res => {
     if (res.stderr != '' && !res.success) {
       throw new Error(res.stderr);
     }
-    for (const line of res.stdout.trim().split(`\n`)) {
-      if (line.startsWith('Platforms')) {
-        return line.replace('Platforms: ', '').replace(/\s/g, '').trim();
+    const builder: Builder = {};
+    itlines: for (const line of res.stdout.trim().split(`\n`)) {
+      const [key, ...rest] = line.split(':');
+      const value = rest.map(v => v.trim()).join(':');
+      if (key.length == 0 || value.length == 0) {
+        continue;
+      }
+      switch (key) {
+        case 'Name': {
+          if (builder.name == undefined) {
+            builder.name = value;
+          } else {
+            builder.node_name = value;
+          }
+          break;
+        }
+        case 'Driver': {
+          builder.driver = value;
+          break;
+        }
+        case 'Endpoint': {
+          builder.node_endpoint = value;
+          break;
+        }
+        case 'Status': {
+          builder.node_status = value;
+          break;
+        }
+        case 'Flags': {
+          builder.node_flags = value;
+          break;
+        }
+        case 'Platforms': {
+          builder.node_platforms = value.replace(/\s/g, '');
+          break itlines;
+        }
       }
     }
+    return builder;
   });
 }
 
@@ -52,7 +96,7 @@ export async function install(inputVersion: string, dockerConfigHome: string): P
   if (!release) {
     throw new Error(`Cannot find buildx ${inputVersion} release`);
   }
-  core.debug(`Release found: ${release.tag_name}`);
+  core.debug(`Release ${release.tag_name} found`);
   const version = release.tag_name.replace(/^v+|v+$/g, '');
 
   let toolPath: string;
@@ -76,7 +120,7 @@ export async function install(inputVersion: string, dockerConfigHome: string): P
   core.debug(`Plugin path is ${pluginPath}`);
   fs.copyFileSync(path.join(toolPath, filename), pluginPath);
 
-  core.info('🔨 Fixing perms...');
+  core.info('Fixing perms');
   fs.chmodSync(pluginPath, '0755');
 
   return pluginPath;
@@ -92,7 +136,7 @@ async function download(version: string): Promise<string> {
   let downloadPath: string;
 
   try {
-    core.info(`⬇️ Downloading ${downloadUrl}...`);
+    core.info(`Downloading ${downloadUrl}`);
     downloadPath = await tc.downloadTool(downloadUrl);
     core.debug(`Downloaded to ${downloadPath}`);
   } catch (error) {

src/context.ts

@@ -1,5 +1,6 @@
 import * as os from 'os';
 import * as core from '@actions/core';
+import {issueCommand} from '@actions/core/lib/command';
 
 export const osPlat: string = os.platform();
 export const osArch: string = os.arch();
@@ -12,6 +13,7 @@ export interface Inputs {
   install: boolean;
   use: boolean;
   endpoint: string;
+  config: string;
 }
 
 export async function getInputs(): Promise<Inputs> {
@@ -24,7 +26,8 @@ export async function getInputs(): Promise<Inputs> {
       '--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host',
     install: /true/i.test(core.getInput('install')),
     use: /true/i.test(core.getInput('use')),
-    endpoint: core.getInput('endpoint')
+    endpoint: core.getInput('endpoint'),
+    config: core.getInput('config')
   };
 }
 
@@ -47,3 +50,8 @@ export const asyncForEach = async (array, callback) => {
     await callback(array[index], index, array);
   }
 };
+
+// FIXME: Temp fix https://github.com/actions/toolkit/issues/777
+export function setOutput(name: string, value: any): void {
+  issueCommand('set-output', {name}, value);
+}

src/main.ts

@@ -10,29 +10,29 @@ import * as stateHelper from './state-helper';
 
 async function run(): Promise<void> {
   try {
-    if (os.platform() !== 'linux') {
-      core.setFailed('Only supported on linux platform');
-      return;
-    }
+    core.startGroup(`Docker info`);
+    await exec.exec('docker', ['version']);
+    await exec.exec('docker', ['info']);
+    core.endGroup();
 
     const inputs: context.Inputs = await context.getInputs();
     const dockerConfigHome: string = process.env.DOCKER_CONFIG || path.join(os.homedir(), '.docker');
 
     if (!(await buildx.isAvailable()) || inputs.version) {
-      core.startGroup(`👉 Installing Buildx`);
+      core.startGroup(`Installing buildx`);
       await buildx.install(inputs.version || 'latest', dockerConfigHome);
       core.endGroup();
     }
 
     const buildxVersion = await buildx.getVersion();
-    core.info(`📣 Buildx version: ${buildxVersion}`);
+    core.info(`Using buildx ${buildxVersion}`);
 
     const builderName: string = inputs.driver == 'docker' ? 'default' : `builder-${require('uuid').v4()}`;
-    core.setOutput('name', builderName);
+    context.setOutput('name', builderName);
     stateHelper.setBuilderName(builderName);
 
     if (inputs.driver !== 'docker') {
-      core.startGroup(`🔨 Creating a new builder instance`);
+      core.startGroup(`Creating a new builder instance`);
       let createArgs: Array<string> = ['buildx', 'create', '--name', builderName, '--driver', inputs.driver];
       if (semver.satisfies(buildxVersion, '>=0.3.0')) {
         await context.asyncForEach(inputs.driverOpts, async driverOpt => {
@@ -48,10 +48,13 @@ async function run(): Promise<void> {
       if (inputs.endpoint) {
         createArgs.push(inputs.endpoint);
       }
+      if (inputs.config) {
+        createArgs.push('--config', inputs.config);
+      }
       await exec.exec('docker', createArgs);
       core.endGroup();
 
-      core.startGroup(`🏃 Booting builder`);
+      core.startGroup(`Booting builder`);
       let bootstrapArgs: Array<string> = ['buildx', 'inspect', '--bootstrap'];
       if (semver.satisfies(buildxVersion, '>=0.4.0')) {
         bootstrapArgs.push('--builder', builderName);
@@ -61,30 +64,52 @@ async function run(): Promise<void> {
     }
 
     if (inputs.install) {
-      core.startGroup(`🤝 Setting buildx as default builder`);
+      core.startGroup(`Setting buildx as default builder`);
       await exec.exec('docker', ['buildx', 'install']);
       core.endGroup();
     }
 
-    core.startGroup(`🛒 Extracting available platforms`);
-    const platforms = await buildx.platforms();
-    core.info(`${platforms}`);
-    core.setOutput('platforms', platforms);
+    core.startGroup(`Inspect builder`);
+    const builder = await buildx.inspect(builderName);
+    core.info(JSON.stringify(builder, undefined, 2));
+    context.setOutput('driver', builder.driver);
+    context.setOutput('endpoint', builder.node_endpoint);
+    context.setOutput('status', builder.node_status);
+    context.setOutput('flags', builder.node_flags);
+    context.setOutput('platforms', builder.node_platforms);
     core.endGroup();
+
+    if (inputs.driver == 'docker-container') {
+      stateHelper.setContainerName(`buildx_buildkit_${builder.node_name}`);
+    }
+    if (core.isDebug() || builder.node_flags?.includes('--debug')) {
+      stateHelper.setDebug('true');
+    }
   } catch (error) {
     core.setFailed(error.message);
   }
 }
 
 async function cleanup(): Promise<void> {
-  if (stateHelper.builderName.length == 0) {
-    return;
+  if (stateHelper.IsDebug && stateHelper.containerName.length > 0) {
+    core.startGroup(`BuildKit container logs`);
+    await mexec.exec('docker', ['logs', `${stateHelper.containerName}`], false).then(res => {
+      if (res.stderr != '' && !res.success) {
+        core.warning(res.stderr);
+      }
+    });
+    core.endGroup();
+  }
+
+  if (stateHelper.builderName.length > 0) {
+    core.startGroup(`Removing builder`);
+    await mexec.exec('docker', ['buildx', 'rm', `${stateHelper.builderName}`], false).then(res => {
+      if (res.stderr != '' && !res.success) {
+        core.warning(res.stderr);
+      }
+    });
+    core.endGroup();
   }
-  await mexec.exec('docker', ['buildx', 'rm', `${stateHelper.builderName}`], false).then(res => {
-    if (res.stderr != '' && !res.success) {
-      core.warning(res.stderr);
-    }
-  });
 }
 
 if (!stateHelper.IsPost) {

src/state-helper.ts

@@ -1,12 +1,22 @@
 import * as core from '@actions/core';
 
 export const IsPost = !!process.env['STATE_isPost'];
+export const IsDebug = !!process.env['STATE_isDebug'];
 export const builderName = process.env['STATE_builderName'] || '';
+export const containerName = process.env['STATE_containerName'] || '';
+
+export function setDebug(debug: string) {
+  core.saveState('isDebug', debug);
+}
 
 export function setBuilderName(builderName: string) {
   core.saveState('builderName', builderName);
 }
 
+export function setContainerName(containerName: string) {
+  core.saveState('containerName', containerName);
+}
+
 if (!IsPost) {
   core.saveState('isPost', 'true');
 }

yarn.lock

@@ -2,10 +2,10 @@
 # yarn lockfile v1
 
 
-"@actions/core@^1.2.6":
-  version "1.2.6"
-  resolved "https://registry.yarnpkg.com/@actions/core/-/core-1.2.6.tgz#a78d49f41a4def18e88ce47c2cac615d5694bf09"
-  integrity sha512-ZQYitnqiyBc3D+k7LsgSBmMDVkOVidaagDG7j3fOym77jNunWRuYx7VSHa9GNfFZh+zh61xsCjRj4JxMZlDqTA==
+"@actions/core@^1.2.6", "@actions/core@^1.2.7":
+  version "1.2.7"
+  resolved "https://registry.yarnpkg.com/@actions/core/-/core-1.2.7.tgz#594f8c45b213f0146e4be7eda8ae5cf4e198e5ab"
+  integrity sha512-kzLFD5BgEvq6ubcxdgPbRKGD2Qrgya/5j+wh4LZzqT915I0V3rED+MvjH6NXghbvk1MXknpNNQ3uKjXSEN00Ig==
 
 "@actions/exec@^1.0.0", "@actions/exec@^1.0.4":
   version "1.0.4"
@@ -14,10 +14,10 @@
   dependencies:
     "@actions/io" "^1.0.1"
 
-"@actions/http-client@^1.0.8", "@actions/http-client@^1.0.9":
-  version "1.0.9"
-  resolved "https://registry.yarnpkg.com/@actions/http-client/-/http-client-1.0.9.tgz#af1947d020043dbc6a3b4c5918892095c30ffb52"
-  integrity sha512-0O4SsJ7q+MK0ycvXPl2e6bMXV7dxAXOGjrXS1eTF9s2S401Tp6c/P3c3Joz04QefC1J6Gt942Wl2jbm3f4mLcg==
+"@actions/http-client@^1.0.11", "@actions/http-client@^1.0.8":
+  version "1.0.11"
+  resolved "https://registry.yarnpkg.com/@actions/http-client/-/http-client-1.0.11.tgz#c58b12e9aa8b159ee39e7dd6cbd0e91d905633c0"
+  integrity sha512-VRYHGQV1rqnROJqdMvGUbY/Kn8vriQe/F9HR2AlYHzmKuM/p3kjNuXhmdBfcVgsvRWTz5C5XW5xvndZrVBuAYg==
   dependencies:
     tunnel "0.0.6"
 
@@ -3114,10 +3114,10 @@ saxes@^5.0.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
   integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
 
-semver@7.x, semver@^7.3.2, semver@^7.3.4:
-  version "7.3.4"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.4.tgz#27aaa7d2e4ca76452f98d3add093a72c943edc97"
-  integrity sha512-tCfb2WLjqFAtXn4KEdxIhalnRtoKFN7nAwj0B3ZXCbQloV2tq5eDbcTmT68JJD3nRJq24/XgxtQKFIpQdtvmVw==
+semver@7.x, semver@^7.3.2, semver@^7.3.5:
+  version "7.3.5"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.5.tgz#0b621c879348d8998e4b0e4be94b3f12e6018ef7"
+  integrity sha512-PoeGJYh8HK4BTO/a9Tf6ZG3veo/A7ZVsYrSA6J8ny9nb3B1VrpkuN+z9OE5wfE5p6H4LchYZsegiQgbJD94ZFQ==
   dependencies:
     lru-cache "^6.0.0"