Merge pull request #36 from crazy-max/image-info

Display image information

.dockerignore

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

.github/CONTRIBUTING.md

@@ -2,15 +2,17 @@
 
 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-qemu-action/fork) and clone the repository
 2. Configure and install the dependencies: `yarn install`
-4. Create a new branch: `git checkout -b my-branch-name`
-5. Make your change
-6. Run pre-checkin: `yarn run pre-checkin`
+3. Create a new branch: `git checkout -b my-branch-name`
+4. Make your changes
+5. Format code and build javascript artifacts: `docker buildx bake pre-checkin`
+6. Validate all code has correctly formatted and built: `docker buildx bake validate`
 7. Push to your fork and [submit a pull request](https://github.com/docker/setup-qemu-action/compare)
 8. Pat your self on the back and wait for your pull request to be reviewed and merged.
 
@@ -24,5 +26,5 @@ 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:
@@ -29,7 +29,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v2.3.3
+        uses: actions/checkout@v2
       -
         name: Set up QEMU
         id: qemu
@@ -43,3 +43,31 @@ jobs:
       -
         name: Dump context
         uses: crazy-max/ghaction-dump-context@v1
+
+  error:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Stop docker
+        run: |
+          sudo systemctl stop docker
+      -
+        name: Set up QEMU
+        id: qemu
+        continue-on-error: true
+        uses: ./
+      -
+        name: Check
+        run: |
+          echo "${{ toJson(steps.qemu) }}"
+          if [ "${{ steps.qemu.outcome }}" != "failure" ] || [ "${{ steps.qemu.conclusion }}" != "success" ]; then
+            echo "::error::Should have failed"
+            exit 1
+          fi
+      -
+        name: Dump context
+        if: always()
+        uses: crazy-max/ghaction-dump-context@v1

.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@v2.3.3
-      -
-        name: Run Labeler
-        uses: crazy-max/ghaction-github-labeler@v3.0.0

.github/workflows/validate.yml

@@ -0,0 +1,24 @@
+name: validate
+
+on:
+  push:
+    branches:
+      - 'master'
+      - 'releases/v*'
+  pull_request:
+    branches:
+      - 'master'
+      - 'releases/v*'
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Validate
+        uses: docker/bake-action@v1
+        with:
+          targets: validate

README.md

@@ -4,12 +4,7 @@
 
 ## About
 
-GitHub Action to install [QEMU static binaries](https://github.com/multiarch/qemu-user-static).
-
-> :bulb: See also:
-> * [login](https://github.com/docker/login-action) action
-> * [setup-buildx](https://github.com/docker/setup-buildx-action) action
-> * [build-push](https://github.com/docker/build-push-action) action
+GitHub Action to install [QEMU](https://github.com/qemu/qemu) static binaries.
 
 ![Screenshot](.github/setup-qemu-action.png)
 
@@ -19,7 +14,6 @@ ___
 * [Customizing](#customizing)
   * [inputs](#inputs)
 * [Keep up-to-date with GitHub Dependabot](#keep-up-to-date-with-github-dependabot)
-* [Limitation](#limitation)
 
 ## Usage
 
@@ -82,7 +76,3 @@ 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).

dist/index.js

@@ -90,36 +90,48 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-const os = __importStar(__webpack_require__(87));
 const mexec = __importStar(__webpack_require__(757));
 const core = __importStar(__webpack_require__(186));
 const exec = __importStar(__webpack_require__(514));
+const command_1 = __webpack_require__(241);
 function run() {
     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 image = core.getInput('image') || 'tonistiigi/binfmt:latest';
             const platforms = core.getInput('platforms') || 'all';
-            core.info(`💎 Installing QEMU static binaries...`);
+            core.startGroup(`Pulling binfmt Docker image`);
+            yield exec.exec('docker', ['pull', image]);
+            core.endGroup();
+            core.startGroup(`Image info`);
+            yield exec.exec('docker', ['image', 'inspect', image]);
+            core.endGroup();
+            core.startGroup(`Installing QEMU static binaries`);
             yield exec.exec('docker', ['run', '--rm', '--privileged', image, '--install', platforms]);
-            core.info('🛒 Extracting available platforms...');
+            core.endGroup();
+            core.startGroup(`Extracting available platforms`);
             yield mexec.exec(`docker`, ['run', '--rm', '--privileged', image], true).then(res => {
                 if (res.stderr != '' && !res.success) {
                     throw new Error(res.stderr);
                 }
                 const platforms = JSON.parse(res.stdout.trim());
                 core.info(`${platforms.supported.join(',')}`);
-                core.setOutput('platforms', platforms.supported.join(','));
+                setOutput('platforms', platforms.supported.join(','));
             });
+            core.endGroup();
         }
         catch (error) {
             core.setFailed(error.message);
         }
     });
 }
+// FIXME: Temp fix https://github.com/actions/toolkit/issues/777
+function setOutput(name, value) {
+    command_1.issueCommand('set-output', { name }, value);
+}
 run();
 //# sourceMappingURL=main.js.map
 
@@ -744,6 +756,25 @@ class ExecState extends events.EventEmitter {
 
 "use strict";
 
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
 var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
     function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
     return new (P || (P = Promise))(function (resolve, reject) {
@@ -753,15 +784,11 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         step((generator = generator.apply(thisArg, _arguments || [])).next());
     });
 };
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
-    return result;
-};
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.getState = exports.saveState = exports.group = exports.endGroup = exports.startGroup = exports.info = exports.warning = exports.error = exports.debug = exports.isDebug = exports.setFailed = exports.setCommandEcho = exports.setOutput = exports.getBooleanInput = exports.getInput = exports.addPath = exports.setSecret = exports.exportVariable = exports.ExitCode = void 0;
 const command_1 = __webpack_require__(241);
+const file_command_1 = __webpack_require__(717);
+const utils_1 = __webpack_require__(278);
 const os = __importStar(__webpack_require__(87));
 const path = __importStar(__webpack_require__(622));
 /**
@@ -788,9 +815,17 @@ var ExitCode;
  */
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 function exportVariable(name, val) {
-    const convertedVal = command_1.toCommandValue(val);
+    const convertedVal = utils_1.toCommandValue(val);
     process.env[name] = convertedVal;
-    command_1.issueCommand('set-env', { name }, convertedVal);
+    const filePath = process.env['GITHUB_ENV'] || '';
+    if (filePath) {
+        const delimiter = '_GitHubActionsFileCommandDelimeter_';
+        const commandValue = `${name}<<${delimiter}${os.EOL}${convertedVal}${os.EOL}${delimiter}`;
+        file_command_1.issueCommand('ENV', commandValue);
+    }
+    else {
+        command_1.issueCommand('set-env', { name }, convertedVal);
+    }
 }
 exports.exportVariable = exportVariable;
 /**
@@ -806,12 +841,20 @@ exports.setSecret = setSecret;
  * @param inputPath
  */
 function addPath(inputPath) {
-    command_1.issueCommand('add-path', {}, inputPath);
+    const filePath = process.env['GITHUB_PATH'] || '';
+    if (filePath) {
+        file_command_1.issueCommand('PATH', inputPath);
+    }
+    else {
+        command_1.issueCommand('add-path', {}, inputPath);
+    }
     process.env['PATH'] = `${inputPath}${path.delimiter}${process.env['PATH']}`;
 }
 exports.addPath = addPath;
 /**
- * Gets the value of an input.  The value is also trimmed.
+ * Gets the value of an input.
+ * Unless trimWhitespace is set to false in InputOptions, the value is also trimmed.
+ * Returns an empty string if the value is not defined.
  *
  * @param     name     name of the input to get
  * @param     options  optional. See InputOptions.
@@ -822,9 +865,34 @@ function getInput(name, options) {
     if (options && options.required && !val) {
         throw new Error(`Input required and not supplied: ${name}`);
     }
+    if (options && options.trimWhitespace === false) {
+        return val;
+    }
     return val.trim();
 }
 exports.getInput = getInput;
+/**
+ * Gets the input value of the boolean type in the YAML 1.2 "core schema" specification.
+ * Support boolean input list: `true | True | TRUE | false | False | FALSE` .
+ * The return value is also in boolean type.
+ * ref: https://yaml.org/spec/1.2/spec.html#id2804923
+ *
+ * @param     name     name of the input to get
+ * @param     options  optional. See InputOptions.
+ * @returns   boolean
+ */
+function getBooleanInput(name, options) {
+    const trueValue = ['true', 'True', 'TRUE'];
+    const falseValue = ['false', 'False', 'FALSE'];
+    const val = getInput(name, options);
+    if (trueValue.includes(val))
+        return true;
+    if (falseValue.includes(val))
+        return false;
+    throw new TypeError(`Input does not meet YAML 1.2 "Core Schema" specification: ${name}\n` +
+        `Support boolean input list: \`true | True | TRUE | false | False | FALSE\``);
+}
+exports.getBooleanInput = getBooleanInput;
 /**
  * Sets the value of an output.
  *
@@ -833,6 +901,7 @@ 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;
@@ -973,15 +1042,29 @@ exports.getState = getState;
 
 "use strict";
 
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
 var __importStar = (this && this.__importStar) || function (mod) {
     if (mod && mod.__esModule) return mod;
     var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.issue = exports.issueCommand = void 0;
 const os = __importStar(__webpack_require__(87));
+const utils_1 = __webpack_require__(278);
 /**
  * Commands
  *
@@ -1035,6 +1118,33 @@ class Command {
         return cmdStr;
     }
 }
+function escapeData(s) {
+    return utils_1.toCommandValue(s)
+        .replace(/%/g, '%25')
+        .replace(/\r/g, '%0D')
+        .replace(/\n/g, '%0A');
+}
+function escapeProperty(s) {
+    return utils_1.toCommandValue(s)
+        .replace(/%/g, '%25')
+        .replace(/\r/g, '%0D')
+        .replace(/\n/g, '%0A')
+        .replace(/:/g, '%3A')
+        .replace(/,/g, '%2C');
+}
+//# sourceMappingURL=command.js.map
+
+/***/ }),
+
+/***/ 278:
+/***/ (function(__unusedmodule, exports) {
+
+"use strict";
+
+// We use any as a valid input type
+/* eslint-disable @typescript-eslint/no-explicit-any */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.toCommandValue = void 0;
 /**
  * Sanitizes an input into a string so it can be passed into issueCommand safely
  * @param input input to sanitize into a string
@@ -1049,21 +1159,7 @@ function toCommandValue(input) {
     return JSON.stringify(input);
 }
 exports.toCommandValue = toCommandValue;
-function escapeData(s) {
-    return toCommandValue(s)
-        .replace(/%/g, '%25')
-        .replace(/\r/g, '%0D')
-        .replace(/\n/g, '%0A');
-}
-function escapeProperty(s) {
-    return toCommandValue(s)
-        .replace(/%/g, '%25')
-        .replace(/\r/g, '%0D')
-        .replace(/\n/g, '%0A')
-        .replace(/:/g, '%3A')
-        .replace(/,/g, '%2C');
-}
-//# sourceMappingURL=command.js.map
+//# sourceMappingURL=utils.js.map
 
 /***/ }),
 
@@ -1443,6 +1539,55 @@ module.exports = require("util");
 
 /***/ }),
 
+/***/ 717:
+/***/ (function(__unusedmodule, exports, __webpack_require__) {
+
+"use strict";
+
+// For internal use, subject to change.
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.issueCommand = void 0;
+// We use any as a valid input type
+/* eslint-disable @typescript-eslint/no-explicit-any */
+const fs = __importStar(__webpack_require__(747));
+const os = __importStar(__webpack_require__(87));
+const utils_1 = __webpack_require__(278);
+function issueCommand(command, message) {
+    const filePath = process.env[`GITHUB_${command}`];
+    if (!filePath) {
+        throw new Error(`Unable to find environment variable for file command ${command}`);
+    }
+    if (!fs.existsSync(filePath)) {
+        throw new Error(`Missing file at path: ${filePath}`);
+    }
+    fs.appendFileSync(filePath, `${utils_1.toCommandValue(message)}${os.EOL}`, {
+        encoding: 'utf8'
+    });
+}
+exports.issueCommand = issueCommand;
+//# sourceMappingURL=file-command.js.map
+
+/***/ }),
+
 /***/ 747:
 /***/ (function(module) {
 

docker-bake.hcl

@@ -0,0 +1,60 @@
+variable "NODE_VERSION" {
+  default = "12"
+}
+
+target "node-version" {
+  args = {
+    NODE_VERSION = NODE_VERSION
+  }
+}
+
+group "default" {
+  targets = ["build"]
+}
+
+group "pre-checkin" {
+  targets = ["vendor-update", "format", "build"]
+}
+
+group "validate" {
+  targets = ["format-validate", "build-validate", "vendor-validate"]
+}
+
+target "build" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "build-update"
+  output = ["."]
+}
+
+target "build-validate" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "build-validate"
+}
+
+target "format" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "format-update"
+  output = ["."]
+}
+
+target "format-validate" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "format-validate"
+}
+
+target "vendor-update" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/vendor.Dockerfile"
+  target = "update"
+  output = ["."]
+}
+
+target "vendor-validate" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/vendor.Dockerfile"
+  target = "validate"
+}

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/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

@@ -26,7 +26,7 @@
   ],
   "license": "Apache-2.0",
   "dependencies": {
-    "@actions/core": "^1.2.6",
+    "@actions/core": "^1.3.0",
     "@actions/exec": "^1.0.4"
   },
   "devDependencies": {

src/main.ts

@@ -1,7 +1,7 @@
-import * as os from 'os';
 import * as mexec from './exec';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
+import {issueCommand} from '@actions/core/lib/command';
 
 interface Platforms {
   supported: string[];
@@ -10,29 +10,44 @@ interface Platforms {
 
 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 image: string = core.getInput('image') || 'tonistiigi/binfmt:latest';
     const platforms: string = core.getInput('platforms') || 'all';
 
-    core.info(`💎 Installing QEMU static binaries...`);
-    await exec.exec('docker', ['run', '--rm', '--privileged', image, '--install', platforms]);
+    core.startGroup(`Pulling binfmt Docker image`);
+    await exec.exec('docker', ['pull', image]);
+    core.endGroup();
 
-    core.info('🛒 Extracting available platforms...');
+    core.startGroup(`Image info`);
+    await exec.exec('docker', ['image', 'inspect', image]);
+    core.endGroup();
+
+    core.startGroup(`Installing QEMU static binaries`);
+    await exec.exec('docker', ['run', '--rm', '--privileged', image, '--install', platforms]);
+    core.endGroup();
+
+    core.startGroup(`Extracting available platforms`);
     await mexec.exec(`docker`, ['run', '--rm', '--privileged', image], true).then(res => {
       if (res.stderr != '' && !res.success) {
         throw new Error(res.stderr);
       }
       const platforms: Platforms = JSON.parse(res.stdout.trim());
       core.info(`${platforms.supported.join(',')}`);
-      core.setOutput('platforms', platforms.supported.join(','));
+      setOutput('platforms', platforms.supported.join(','));
     });
+    core.endGroup();
   } catch (error) {
     core.setFailed(error.message);
   }
 }
 
+// FIXME: Temp fix https://github.com/actions/toolkit/issues/777
+function setOutput(name: string, value: any): void {
+  issueCommand('set-output', {name}, value);
+}
+
 run();

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@^1.3.0":
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/@actions/core/-/core-1.3.0.tgz#f5e4b24c889e7f2e58b466cc8c7481292284eba0"
+  integrity sha512-xxtX0Cwdhb8LcgatfJkokqT8KzPvcIbwL9xpLU09nOwBzaStbfm0dNncsP0M4us+EpoPdWy7vbzU5vSOH7K6pg==
 
 "@actions/exec@^1.0.4":
   version "1.0.4"