init

.dockerignore

@@ -0,0 +1,12 @@
+/coverage
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

.editorconfig

@@ -0,0 +1,15 @@
+# This file is for unifying the coding style for different editors and IDEs.
+# More information at http://editorconfig.org
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false

.eslintignore

@@ -0,0 +1,3 @@
+/dist/**
+/coverage/**
+/node_modules/**

.eslintrc.json

@@ -0,0 +1,24 @@
+{
+  "env": {
+    "node": true,
+    "es6": true,
+    "jest": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:jest/recommended",
+    "plugin:prettier/recommended"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "plugins": [
+    "@typescript-eslint",
+    "jest",
+    "prettier"
+  ]
+}

.gitattributes

@@ -0,0 +1,4 @@
+/.yarn/releases/** binary
+/.yarn/plugins/** binary
+/dist/** linguist-generated=true
+/lib/** linguist-generated=true

.github/CODE_OF_CONDUCT.md

@@ -0,0 +1,3 @@
+# Code of conduct
+
+- [Moby community guidelines](https://github.com/moby/moby/blob/master/CONTRIBUTING.md#moby-community-guidelines)

.github/CONTRIBUTING.md

@@ -0,0 +1,30 @@
+## Contributing
+
+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://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`
+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 yourself 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:
+
+- 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**.
+- Write a [good commit message](http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html).
+
+## Resources
+
+- [How to Contribute to Open Source](https://opensource.guide/how-to-contribute/)
+- [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.yml

@@ -0,0 +1,101 @@
+# https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/syntax-for-githubs-form-schema
+name: Bug Report
+description: Report a bug
+labels:
+  - status/triage
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for taking the time to report a bug!
+        If this is a security issue please report it to the [Docker Security team](mailto:security@docker.com).
+
+  - type: checkboxes
+    attributes:
+      label: Contributing guidelines
+      description: >
+        Make sure you've read the contributing guidelines before proceeding.
+      options:
+        - label: I've read the [contributing guidelines](https://github.com/docker/setup-qemu-action/blob/master/.github/CONTRIBUTING.md) and wholeheartedly agree
+          required: true
+
+  - type: checkboxes
+    attributes:
+      label: "I've found a bug, and:"
+      description: |
+        Make sure that your request fulfills all of the following requirements.
+        If one requirement cannot be satisfied, explain in detail why.
+      options:
+        - label: The documentation does not mention anything about my problem
+        - label: There are no open or closed issues that are related to my problem
+
+  - type: textarea
+    attributes:
+      label: Description
+      description: >
+        Provide a brief description of the bug in 1-2 sentences.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Expected behaviour
+      description: >
+        Describe precisely what you'd expect to happen.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Actual behaviour
+      description: >
+        Describe precisely what is actually happening.
+    validations:
+      required: true
+
+  - type: input
+    attributes:
+      label: Repository URL
+      description: >
+        Enter the URL of the repository where you are experiencing the
+        issue. If your repository is private, provide a link to a minimal
+        repository that reproduces the issue.
+
+  - type: input
+    attributes:
+      label: Workflow run URL
+      description: >
+        Enter the URL of the GitHub Action workflow run if public (e.g.
+        `https://github.com/<user>/<repo>/actions/runs/<id>`)
+
+  - type: textarea
+    attributes:
+      label: YAML workflow
+      description: |
+        Provide the YAML of the workflow that's causing the issue.
+        Make sure to remove any sensitive information.
+      render: yaml
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Workflow logs
+      description: >
+        [Attach](https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/attaching-files)
+        the [log file of your workflow run](https://docs.github.com/en/actions/managing-workflow-runs/using-workflow-run-logs#downloading-logs)
+        and make sure to remove any sensitive information.
+
+  - type: textarea
+    attributes:
+      label: BuildKit logs
+      description: >
+        If applicable, provide the [BuildKit container logs](https://docs.docker.com/build/ci/github-actions/configure-builder/#buildkit-container-logs)
+      render: text
+
+  - type: textarea
+    attributes:
+      label: Additional info
+      description: |
+        Provide any additional information that could be useful.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,9 @@
+# https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/configuring-issue-templates-for-your-repository#configuring-the-template-chooser
+blank_issues_enabled: true
+contact_links:
+  - name: Questions and Discussions
+    url: https://github.com/docker/setup-qemu-action/discussions/new
+    about: Use Github Discussions to ask questions and/or open discussion topics.
+  - name: Documentation
+    url: https://docs.docker.com/build/ci/github-actions/
+    about: Read the documentation.

.github/ISSUE_TEMPLATE/feature.yml

@@ -0,0 +1,15 @@
+# https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/syntax-for-githubs-form-schema
+name: Feature request
+description: Missing functionality? Come tell us about it!
+labels:
+  - kind/enhancement
+  - status/triage
+
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: What is the feature you want to see?
+    validations:
+      required: true

.github/SECURITY.md

@@ -0,0 +1,12 @@
+# Reporting security issues
+
+The project maintainers take security seriously. If you discover a security
+issue, please bring it to their attention right away!
+
+**Please _DO NOT_ file a public issue**, instead send your report privately to
+[security@docker.com](mailto:security@docker.com).
+
+Security reports are greatly appreciated, and we will publicly thank you for it.
+We also like to send gifts—if you'd like Docker swag, make sure to let
+us know. We currently do not offer a paid security bounty program, but are not
+ruling it out in the future.

.github/dependabot.yml

@@ -0,0 +1,19 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    labels:
+      - "dependencies"
+      - "bot"
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    versioning-strategy: "increase"
+    allow:
+      - dependency-type: "production"
+    labels:
+      - "dependencies"
+      - "bot"

.github/workflows/ci.yml

@@ -0,0 +1,123 @@
+name: ci
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  schedule:
+    - cron: '0 10 * * *'
+  push:
+    branches:
+      - 'master'
+      - 'releases/v*'
+    tags:
+      - 'v*'
+  pull_request:
+
+jobs:
+  default:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Set up QEMU
+        id: qemu
+        uses: ./
+      -
+        name: Available platforms
+        run: echo ${{ steps.qemu.outputs.platforms }}
+
+  main:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+          - tonistiigi/binfmt:latest
+          - tonistiigi/binfmt:master
+        platforms:
+          - all
+          - arm64,riscv64,arm
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Set up QEMU
+        id: qemu
+        uses: ./
+        with:
+          image: ${{ matrix.image }}
+          platforms: ${{ matrix.platforms }}
+      -
+        name: Available platforms
+        run: echo ${{ steps.qemu.outputs.platforms }}
+
+  error:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Stop docker
+        run: |
+          sudo systemctl stop docker docker.socket
+      -
+        name: Set up QEMU
+        id: qemu
+        continue-on-error: true
+        uses: ./
+      -
+        name: Check
+        run: |
+          echo "${{ toJson(steps.qemu) }}"
+          if [ "${{ steps.qemu.outcome }}" != "failure" ] || [ "${{ steps.qemu.conclusion }}" != "success" ]; then
+            echo "::error::Should have failed"
+            exit 1
+          fi
+
+  cache-image:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        cache:
+          - true
+          - false
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Set up QEMU
+        id: qemu
+        uses: ./
+        with:
+          image: tonistiigi/binfmt:master
+          cache-image: ${{ matrix.cache }}
+      -
+        name: Available platforms
+        run: echo ${{ steps.qemu.outputs.platforms }}
+
+  version:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+          - tonistiigi/binfmt:master
+          - tonistiigi/binfmt:latest
+          - tonistiigi/binfmt:qemu-v7.0.0
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Set up QEMU
+        uses: ./
+        with:
+          image: ${{ matrix.image }}

.github/workflows/publish.yml

@@ -0,0 +1,21 @@
+name: publish
+
+on:
+  release:
+    types:
+      - published
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+      packages: write
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Publish
+        uses: actions/publish-immutable-action@v0.0.4

.github/workflows/test.yml

@@ -0,0 +1,28 @@
+name: test
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  push:
+    branches:
+      - 'master'
+      - 'releases/v*'
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Test
+        uses: docker/bake-action@v6
+        with:
+          targets: test
+      -
+        name: Upload coverage
+        uses: codecov/codecov-action@v5
+        with:
+          files: ./coverage/clover.xml
+          token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/validate.yml

@@ -0,0 +1,43 @@
+name: validate
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  push:
+    branches:
+      - 'master'
+      - 'releases/v*'
+  pull_request:
+
+jobs:
+  prepare:
+    runs-on: ubuntu-latest
+    outputs:
+      targets: ${{ steps.generate.outputs.targets }}
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: List targets
+        id: generate
+        uses: docker/bake-action/subaction/list-targets@v6
+        with:
+          target: validate
+
+  validate:
+    runs-on: ubuntu-latest
+    needs:
+      - prepare
+    strategy:
+      fail-fast: false
+      matrix:
+        target: ${{ fromJson(needs.prepare.outputs.targets) }}
+    steps:
+      -
+        name: Validate
+        uses: docker/bake-action@v6
+        with:
+          targets: ${{ matrix.target }}

.gitignore

@@ -0,0 +1,53 @@
+# https://raw.githubusercontent.com/github/gitignore/main/Node.gitignore
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

.prettierignore

@@ -0,0 +1,6 @@
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# yarn v2
+.yarn/

.prettierrc.json

@@ -0,0 +1,11 @@
+{
+  "printWidth": 120,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "bracketSpacing": false,
+  "arrowParens": "avoid",
+  "parser": "typescript"
+}

.yarnrc.yml

@@ -0,0 +1,13 @@
+logFilters:
+  - code: YN0013
+    level: discard
+  - code: YN0019
+    level: discard
+  - code: YN0076
+    level: discard
+
+nodeLinker: node-modules
+
+plugins:
+  - path: .yarn/plugins/@yarnpkg/plugin-interactive-tools.cjs
+    spec: "@yarnpkg/plugin-interactive-tools"

LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        https://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
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+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
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+
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+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2013-2018 Docker, Inc.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       https://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

README.md

@@ -0,0 +1,61 @@
+[![GitHub release](https://img.shields.io/github/release/docker/setup-qemu-action.svg?style=flat-square)](https://github.com/docker/setup-qemu-action/releases/latest)
+[![GitHub marketplace](https://img.shields.io/badge/marketplace-docker--setup--qemu-blue?logo=github&style=flat-square)](https://github.com/marketplace/actions/docker-setup-qemu)
+[![CI workflow](https://img.shields.io/github/actions/workflow/status/docker/setup-qemu-action/ci.yml?branch=master&label=ci&logo=github&style=flat-square)](https://github.com/docker/setup-qemu-action/actions?workflow=ci)
+[![Test workflow](https://img.shields.io/github/actions/workflow/status/docker/setup-qemu-action/test.yml?branch=master&label=test&logo=github&style=flat-square)](https://github.com/docker/setup-qemu-action/actions?workflow=test)
+[![Codecov](https://img.shields.io/codecov/c/github/docker/setup-qemu-action?logo=codecov&style=flat-square)](https://codecov.io/gh/docker/setup-qemu-action)
+
+## About
+
+GitHub Action to install [QEMU](https://github.com/qemu/qemu) static binaries.
+
+![Screenshot](.github/setup-qemu-action.png)
+
+___
+
+* [Usage](#usage)
+* [Customizing](#customizing)
+  * [inputs](#inputs)
+  * [outputs](#outputs)
+* [Contributing](#contributing)
+
+## Usage
+
+```yaml
+name: ci
+
+on:
+  push:
+
+jobs:
+  qemu:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+```
+
+## Customizing
+
+### inputs
+
+The following inputs can be used as `step.with` keys:
+
+| Name          | Type   | Default                                                                       | Description                                        |
+|---------------|--------|-------------------------------------------------------------------------------|----------------------------------------------------|
+| `image`       | String | [`tonistiigi/binfmt:latest`](https://hub.docker.com/r/tonistiigi/binfmt/tags) | QEMU static binaries Docker image                  |
+| `platforms`   | String | `all`                                                                         | Platforms to install (e.g., `arm64,riscv64,arm`)   |
+| `cache-image` | Bool   | `true`                                                                        | Cache binfmt image to GitHub Actions cache backend |
+
+### outputs
+
+The following outputs are available:
+
+| Name          | Type    | Description                           |
+|---------------|---------|---------------------------------------|
+| `platforms`   | String  | Available platforms (comma separated) |
+
+## Contributing
+
+Want to contribute? Awesome! You can find information about contributing to
+this project in the [CONTRIBUTING.md](/.github/CONTRIBUTING.md)

__tests__/context.test.ts

@@ -0,0 +1,72 @@
+import {beforeEach, describe, expect, test} from '@jest/globals';
+
+import * as context from '../src/context';
+
+describe('getInputs', () => {
+  beforeEach(() => {
+    process.env = Object.keys(process.env).reduce((object, key) => {
+      if (!key.startsWith('INPUT_')) {
+        object[key] = process.env[key];
+      }
+      return object;
+    }, {});
+  });
+
+  // prettier-ignore
+  test.each([
+    [
+      0,
+      new Map<string, string>([
+        ['cache-image', 'true'],
+      ]),
+      {
+        image: 'docker.io/tonistiigi/binfmt:latest',
+        platforms: 'all',
+        cacheImage: true,
+      } as context.Inputs
+    ],
+    [
+      1,
+      new Map<string, string>([
+        ['image', 'docker/binfmt:latest'],
+        ['platforms', 'arm64,riscv64,arm'],
+        ['cache-image', 'false'],
+      ]),
+      {
+        image: 'docker/binfmt:latest',
+        platforms: 'arm64,riscv64,arm',
+        cacheImage: false,
+      } as context.Inputs
+    ],
+    [
+      2,
+      new Map<string, string>([
+        ['platforms', 'arm64, riscv64, arm '],
+        ['cache-image', 'true'],
+      ]),
+      {
+        image: 'docker.io/tonistiigi/binfmt:latest',
+        platforms: 'arm64,riscv64,arm',
+        cacheImage: true,
+      } as context.Inputs
+    ]
+  ])(
+    '[%d] given %p as inputs, returns %p',
+    async (num: number, inputs: Map<string, string>, expected: context.Inputs) => {
+      inputs.forEach((value: string, name: string) => {
+        setInput(name, value);
+      });
+      const res = await context.getInputs();
+      expect(res).toEqual(expected);
+    }
+  );
+});
+
+// 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()}`;
+}
+
+function setInput(name: string, value: string): void {
+  process.env[getInputName(name)] = value;
+}

action.yml

@@ -0,0 +1,30 @@
+# https://help.github.com/en/articles/metadata-syntax-for-github-actions
+name: 'Docker Setup QEMU'
+description: 'Install QEMU static binaries'
+author: 'docker'
+branding:
+  icon: 'anchor'
+  color: 'blue'
+
+inputs:
+  image:
+    description: 'QEMU static binaries Docker image (e.g. tonistiigi/binfmt:latest)'
+    default: 'docker.io/tonistiigi/binfmt:latest'
+    required: false
+  platforms:
+    description: 'Platforms to install (e.g. arm64,riscv64,arm)'
+    default: 'all'
+    required: false
+  cache-image:
+    description: 'Cache binfmt image to GitHub Actions cache backend'
+    default: 'true'
+    required: false
+
+outputs:
+  platforms:
+    description: 'Available platforms (comma separated)'
+
+runs:
+  using: 'node20'
+  main: 'dist/index.js'
+  post: 'dist/index.js'

codecov.yml

@@ -0,0 +1,3 @@
+comment: false
+github_checks:
+  annotations: false

dev.Dockerfile

@@ -0,0 +1,80 @@
+# syntax=docker/dockerfile:1
+
+ARG NODE_VERSION=20
+
+FROM node:${NODE_VERSION}-alpine AS base
+RUN apk add --no-cache cpio findutils git
+WORKDIR /src
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/.yarn/cache <<EOT
+  corepack enable
+  yarn --version
+  yarn config set --home enableTelemetry 0
+EOT
+
+FROM base AS deps
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/.yarn/cache \
+  --mount=type=cache,target=/src/node_modules \
+  yarn install && mkdir /vendor && cp yarn.lock /vendor
+
+FROM scratch AS vendor-update
+COPY --from=deps /vendor /
+
+FROM deps AS vendor-validate
+RUN --mount=type=bind,target=.,rw <<EOT
+  set -e
+  git add -A
+  cp -rf /vendor/* .
+  if [ -n "$(git status --porcelain -- yarn.lock)" ]; then
+    echo >&2 'ERROR: Vendor result differs. Please vendor your package with "docker buildx bake vendor"'
+    git status --porcelain -- yarn.lock
+    exit 1
+  fi
+EOT
+
+FROM deps AS build
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/.yarn/cache \
+  --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 <<EOT
+  set -e
+  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
+EOT
+
+FROM deps AS format
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/.yarn/cache \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run format \
+  && mkdir /out && find . -name '*.ts' -not -path './node_modules/*' -not -path './.yarn/*' | cpio -pdm /out
+
+FROM scratch AS format-update
+COPY --from=format /out /
+
+FROM deps AS lint
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/.yarn/cache \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run lint
+
+FROM deps AS test
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/.yarn/cache \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run test --coverage --coverageDirectory=/tmp/coverage
+
+FROM scratch AS test-coverage
+COPY --from=test /tmp/coverage /

docker-bake.hcl

@@ -0,0 +1,66 @@
+target "_common" {
+  args = {
+    BUILDKIT_CONTEXT_KEEP_GIT_DIR = 1
+  }
+}
+
+group "default" {
+  targets = ["build"]
+}
+
+group "pre-checkin" {
+  targets = ["vendor", "format", "build"]
+}
+
+group "validate" {
+  targets = ["lint", "build-validate", "vendor-validate"]
+}
+
+target "build" {
+  inherits = ["_common"]
+  dockerfile = "dev.Dockerfile"
+  target = "build-update"
+  output = ["."]
+}
+
+target "build-validate" {
+  inherits = ["_common"]
+  dockerfile = "dev.Dockerfile"
+  target = "build-validate"
+  output = ["type=cacheonly"]
+}
+
+target "format" {
+  inherits = ["_common"]
+  dockerfile = "dev.Dockerfile"
+  target = "format-update"
+  output = ["."]
+}
+
+target "lint" {
+  inherits = ["_common"]
+  dockerfile = "dev.Dockerfile"
+  target = "lint"
+  output = ["type=cacheonly"]
+}
+
+target "vendor" {
+  inherits = ["_common"]
+  dockerfile = "dev.Dockerfile"
+  target = "vendor-update"
+  output = ["."]
+}
+
+target "vendor-validate" {
+  inherits = ["_common"]
+  dockerfile = "dev.Dockerfile"
+  target = "vendor-validate"
+  output = ["type=cacheonly"]
+}
+
+target "test" {
+  inherits = ["_common"]
+  dockerfile = "dev.Dockerfile"
+  target = "test-coverage"
+  output = ["./coverage"]
+}

jest.config.ts

@@ -0,0 +1,29 @@
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
+
+const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'docker-setup-qemu-action-'));
+
+process.env = Object.assign({}, process.env, {
+  TEMP: tmpDir,
+  GITHUB_REPOSITORY: 'docker/setup-qemu-action',
+  RUNNER_TEMP: path.join(tmpDir, 'runner-temp'),
+  RUNNER_TOOL_CACHE: path.join(tmpDir, 'runner-tool-cache')
+}) as {
+  [key: string]: string;
+};
+
+module.exports = {
+  clearMocks: true,
+  moduleFileExtensions: ['js', 'ts'],
+  testMatch: ['**/*.test.ts'],
+  transform: {
+    '^.+\\.ts$': 'ts-jest'
+  },
+  moduleNameMapper: {
+    '^csv-parse/sync': '<rootDir>/node_modules/csv-parse/dist/cjs/sync.cjs'
+  },
+  collectCoverageFrom: ['src/**/{!(main.ts),}.ts'],
+  coveragePathIgnorePatterns: ['lib/', 'node_modules/', '__mocks__/', '__tests__/'],
+  verbose: true
+};

package.json

@@ -0,0 +1,46 @@
+{
+  "name": "docker-setup-qemu",
+  "description": "Install QEMU static binaries",
+  "main": "src/main.ts",
+  "scripts": {
+    "build": "ncc build src/main.ts --source-map --minify --license licenses.txt",
+    "lint": "yarn run prettier && yarn run eslint",
+    "format": "yarn run prettier:fix && yarn run eslint:fix",
+    "eslint": "eslint --max-warnings=0 .",
+    "eslint:fix": "eslint --fix .",
+    "prettier": "prettier --check \"./**/*.ts\"",
+    "prettier:fix": "prettier --write \"./**/*.ts\"",
+    "test": "jest"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/docker/setup-qemu-action.git"
+  },
+  "keywords": [
+    "actions",
+    "docker",
+    "qemu"
+  ],
+  "author": "Docker Inc.",
+  "license": "Apache-2.0",
+  "packageManager": "yarn@3.6.3",
+  "dependencies": {
+    "@actions/core": "^1.11.1",
+    "@docker/actions-toolkit": "^0.56.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20.12.12",
+    "@typescript-eslint/eslint-plugin": "^7.9.0",
+    "@typescript-eslint/parser": "^7.9.0",
+    "@vercel/ncc": "^0.38.1",
+    "eslint": "^8.57.0",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-jest": "^28.5.0",
+    "eslint-plugin-prettier": "^5.1.3",
+    "jest": "^29.7.0",
+    "prettier": "^3.2.5",
+    "ts-jest": "^29.1.2",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.4.5"
+  }
+}

src/context.ts

@@ -0,0 +1,16 @@
+import * as core from '@actions/core';
+import {Util} from '@docker/actions-toolkit/lib/util';
+
+export interface Inputs {
+  image: string;
+  platforms: string;
+  cacheImage: boolean;
+}
+
+export function getInputs(): Inputs {
+  return {
+    image: core.getInput('image') || 'docker.io/tonistiigi/binfmt:latest',
+    platforms: Util.getInputList('platforms').join(',') || 'all',
+    cacheImage: core.getBooleanInput('cache-image')
+  };
+}

src/main.ts

@@ -0,0 +1,70 @@
+import * as context from './context';
+import * as core from '@actions/core';
+import * as actionsToolkit from '@docker/actions-toolkit';
+
+import {Docker} from '@docker/actions-toolkit/lib/docker/docker';
+
+interface Platforms {
+  supported: string[];
+  available: string[];
+}
+
+actionsToolkit.run(
+  // main
+  async () => {
+    const input: context.Inputs = context.getInputs();
+
+    await core.group(`Docker info`, async () => {
+      await Docker.printVersion();
+      await Docker.printInfo();
+    });
+
+    await core.group(`Pulling binfmt Docker image`, async () => {
+      await Docker.pull(input.image, input.cacheImage);
+    });
+
+    await core.group(`Image info`, async () => {
+      await Docker.getExecOutput(['image', 'inspect', input.image], {
+        ignoreReturnCode: true
+      }).then(res => {
+        if (res.stderr.length > 0 && res.exitCode != 0) {
+          throw new Error(res.stderr.match(/(.*)\s*$/)?.[0]?.trim() ?? 'unknown error');
+        }
+      });
+    });
+
+    await core.group(`Binfmt version`, async () => {
+      await Docker.getExecOutput(['run', '--rm', '--privileged', input.image, '--version'], {
+        ignoreReturnCode: true
+      }).then(res => {
+        if (res.stderr.length > 0 && res.exitCode != 0) {
+          throw new Error(res.stderr.match(/(.*)\s*$/)?.[0]?.trim() ?? 'unknown error');
+        }
+      });
+    });
+
+    await core.group(`Installing QEMU static binaries`, async () => {
+      await Docker.getExecOutput(['run', '--rm', '--privileged', input.image, '--install', input.platforms], {
+        ignoreReturnCode: true
+      }).then(res => {
+        if (res.stderr.length > 0 && res.exitCode != 0) {
+          throw new Error(res.stderr.match(/(.*)\s*$/)?.[0]?.trim() ?? 'unknown error');
+        }
+      });
+    });
+
+    await core.group(`Extracting available platforms`, async () => {
+      await Docker.getExecOutput(['run', '--rm', '--privileged', input.image], {
+        ignoreReturnCode: true,
+        silent: true
+      }).then(res => {
+        if (res.stderr.length > 0 && res.exitCode != 0) {
+          throw new Error(res.stderr.match(/(.*)\s*$/)?.[0]?.trim() ?? 'unknown error');
+        }
+        const platforms: Platforms = JSON.parse(res.stdout.trim());
+        core.info(`${platforms.supported.join(',')}`);
+        core.setOutput('platforms', platforms.supported.join(','));
+      });
+    });
+  }
+);

tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "esModuleInterop": true,
+    "target": "es6",
+    "module": "commonjs",
+    "strict": true,
+    "newLine": "lf",
+    "outDir": "./lib",
+    "rootDir": "./src",
+    "forceConsistentCasingInFileNames": true,
+    "noImplicitAny": false,
+    "resolveJsonModule": true,
+    "useUnknownInCatchVariables": false,
+  },
+  "exclude": [
+    "./__tests__/**/*",
+    "./lib/**/*",
+    "node_modules",
+    "jest.config.ts"
+  ]
+}