Merge pull request #72 from crazy-max/buildkit-version

Display BuildKit version

.github/workflows/ci.yml

@@ -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
@@ -175,6 +243,40 @@ jobs:
         uses: ./
         with:
           endpoint: mycontext
+        env:
+          DOCKER_CONTEXT: 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
@@ -204,8 +306,10 @@ 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/test.yml

@@ -22,6 +22,9 @@ jobs:
         uses: docker/bake-action@v1
         with:
           targets: validate
+      -
+        name: Set up Docker Buildx
+        uses: ./
       -
         name: Test
         uses: docker/bake-action@v1

README.md

@@ -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
@@ -129,6 +132,7 @@ Following inputs can be used as `step.with` keys
 | `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/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

@@ -519,12 +519,13 @@ 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) {
@@ -535,7 +536,7 @@ function run() {
             const buildxVersion = yield buildx.getVersion();
             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`);
@@ -554,6 +555,9 @@ 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`);
@@ -569,11 +573,24 @@ function run() {
                 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}`);
+                core.startGroup(`BuildKit version`);
+                core.info(yield buildx.getBuildKitVersion(`buildx_buildkit_${builder.node_name}`));
+                core.endGroup();
+            }
+            if (core.isDebug() || ((_a = builder.node_flags) === null || _a === void 0 ? void 0 : _a.includes('--debug'))) {
+                stateHelper.setDebug('true');
+            }
         }
         catch (error) {
             core.setFailed(error.message);
@@ -582,14 +599,24 @@ function run() {
 }
 function cleanup() {
     return __awaiter(this, void 0, void 0, function* () {
-        if (stateHelper.builderName.length == 0) {
-            return;
+        if (stateHelper.IsDebug && stateHelper.containerName.length > 0) {
+            core.startGroup(`BuildKit container logs`);
+            yield mexec.exec('docker', ['logs', `${stateHelper.containerName}`], false).then(res => {
+                if (res.stderr.length > 0 && !res.success) {
+                    core.warning(res.stderr);
+                }
+            });
+            core.endGroup();
+        }
+        if (stateHelper.builderName.length > 0) {
+            core.startGroup(`Removing builder`);
+            yield mexec.exec('docker', ['buildx', 'rm', `${stateHelper.builderName}`], false).then(res => {
+                if (res.stderr.length > 0 && !res.success) {
+                    core.warning(res.stderr);
+                }
+            });
+            core.endGroup();
         }
-        yield mexec.exec('docker', ['buildx', 'rm', `${stateHelper.builderName}`], false).then(res => {
-            if (res.stderr != '' && !res.success) {
-                core.warning(res.stderr);
-            }
-        });
     });
 }
 if (!stateHelper.IsPost) {
@@ -1484,6 +1511,7 @@ 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 +2150,7 @@ 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.getBuildKitVersion = 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));
@@ -2135,7 +2163,7 @@ const tc = __importStar(__webpack_require__(784));
 function getVersion() {
     return __awaiter(this, void 0, void 0, function* () {
         return yield exec.exec(`docker`, ['buildx', 'version'], true).then(res => {
-            if (res.stderr != '' && !res.success) {
+            if (res.stderr.length > 0 && !res.success) {
                 throw new Error(res.stderr);
             }
             return parseVersion(res.stdout);
@@ -2156,7 +2184,7 @@ exports.parseVersion = parseVersion;
 function isAvailable() {
     return __awaiter(this, void 0, void 0, function* () {
         return yield exec.exec(`docker`, ['buildx'], true).then(res => {
-            if (res.stderr != '' && !res.success) {
+            if (res.stderr.length > 0 && !res.success) {
                 return false;
             }
             return res.success;
@@ -2164,21 +2192,56 @@ 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 => {
-            if (res.stderr != '' && !res.success) {
+        return yield exec.exec(`docker`, ['buildx', 'inspect', name], true).then(res => {
+            if (res.stderr.length > 0 && !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);
@@ -2254,6 +2317,28 @@ function filename(version) {
         return util.format('buildx-v%s.%s-%s%s', version, platform, arch, ext);
     });
 }
+function getBuildKitVersion(containerID) {
+    return __awaiter(this, void 0, void 0, function* () {
+        return exec.exec(`docker`, ['inspect', '--format', '{{.Config.Image}}', containerID], true).then(bkitimage => {
+            if (bkitimage.success && bkitimage.stdout.length > 0) {
+                return exec.exec(`docker`, ['run', '--rm', bkitimage.stdout, '--version'], true).then(bkitversion => {
+                    if (bkitversion.success && bkitversion.stdout.length > 0) {
+                        return `${bkitimage.stdout} => ${bkitversion.stdout}`;
+                    }
+                    else if (bkitversion.stderr.length > 0) {
+                        core.warning(bkitversion.stderr);
+                    }
+                    return bkitversion.stdout;
+                });
+            }
+            else if (bkitimage.stderr.length > 0) {
+                core.warning(bkitimage.stderr);
+            }
+            return bkitimage.stdout;
+        });
+    });
+}
+exports.getBuildKitVersion = getBuildKitVersion;
 //# sourceMappingURL=buildx.js.map
 
 /***/ }),
@@ -5580,14 +5665,24 @@ 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 +8102,10 @@ 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 +8118,8 @@ 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 +8142,11 @@ 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
 
 /***/ }),

package.json

@@ -27,7 +27,7 @@
   ],
   "license": "Apache-2.0",
   "dependencies": {
-    "@actions/core": "^1.2.6",
+    "@actions/core": "^1.2.7",
     "@actions/exec": "^1.0.4",
     "@actions/http-client": "^1.0.11",
     "@actions/tool-cache": "^1.6.1",

src/buildx.ts

@@ -8,9 +8,19 @@ 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) {
+    if (res.stderr.length > 0 && !res.success) {
       throw new Error(res.stderr);
     }
     return parseVersion(res.stdout);
@@ -27,23 +37,57 @@ export async function parseVersion(stdout: string): Promise<string> {
 
 export async function isAvailable(): Promise<Boolean> {
   return await exec.exec(`docker`, ['buildx'], true).then(res => {
-    if (res.stderr != '' && !res.success) {
+    if (res.stderr.length > 0 && !res.success) {
       return false;
     }
     return res.success;
   });
 }
 
-export async function platforms(): Promise<String | undefined> {
-  return await exec.exec(`docker`, ['buildx', 'inspect'], true).then(res => {
-    if (res.stderr != '' && !res.success) {
+export async function inspect(name: string): Promise<Builder> {
+  return await exec.exec(`docker`, ['buildx', 'inspect', name], true).then(res => {
+    if (res.stderr.length > 0 && !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;
   });
 }
 
@@ -127,3 +171,21 @@ async function filename(version: string): Promise<string> {
   const ext: string = context.osPlat == 'win32' ? '.exe' : '';
   return util.format('buildx-v%s.%s-%s%s', version, platform, arch, ext);
 }
+
+export async function getBuildKitVersion(containerID: string): Promise<string> {
+  return exec.exec(`docker`, ['inspect', '--format', '{{.Config.Image}}', containerID], true).then(bkitimage => {
+    if (bkitimage.success && bkitimage.stdout.length > 0) {
+      return exec.exec(`docker`, ['run', '--rm', bkitimage.stdout, '--version'], true).then(bkitversion => {
+        if (bkitversion.success && bkitversion.stdout.length > 0) {
+          return `${bkitimage.stdout} => ${bkitversion.stdout}`;
+        } else if (bkitversion.stderr.length > 0) {
+          core.warning(bkitversion.stderr);
+        }
+        return bkitversion.stdout;
+      });
+    } else if (bkitimage.stderr.length > 0) {
+      core.warning(bkitimage.stderr);
+    }
+    return bkitimage.stdout;
+  });
+}

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

@@ -10,10 +10,10 @@ 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');
@@ -28,7 +28,7 @@ async function run(): Promise<void> {
     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') {
@@ -48,6 +48,9 @@ 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();
 
@@ -66,25 +69,50 @@ async function run(): Promise<void> {
       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}`);
+      core.startGroup(`BuildKit version`);
+      core.info(await buildx.getBuildKitVersion(`buildx_buildkit_${builder.node_name}`));
+      core.endGroup();
+    }
+    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', `${stateHelper.containerName}`], false).then(res => {
+      if (res.stderr.length > 0 && !res.success) {
+        core.warning(res.stderr);
+      }
+    });
+    core.endGroup();
+  }
+
+  if (stateHelper.builderName.length > 0) {
+    core.startGroup(`Removing builder`);
+    await mexec.exec('docker', ['buildx', 'rm', `${stateHelper.builderName}`], false).then(res => {
+      if (res.stderr.length > 0 && !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"