initial implementation

.editorconfig

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+# 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

.eslintrc.json

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+{
+  "env": {
+    "node": true,
+    "es2021": true,
+    "jest": true
+  },
+  "extends": [
+    "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

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+/dist/** linguist-generated=true
+/lib/** linguist-generated=true

.gitignore

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+node_modules
+lib
+
+# Rest of the file pulled from https://github.com/github/gitignore/blob/master/Node.gitignore
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-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
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# next.js build output
+.next
+
+# nuxt.js build output
+.nuxt
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/

.prettierrc.json

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

action.yml

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+# https://help.github.com/en/articles/metadata-syntax-for-github-actions
+name: 'Docker Setup Docker'
+description: 'Set up Docker'
+author: 'docker'
+branding:
+  icon: 'anchor'
+  color: 'blue'
+
+inputs:
+  version:
+    description: 'Docker CE version. (e.g, 23.0.1)'
+    required: false
+
+runs:
+  using: 'node16'
+  main: 'dist/index.js'

package.json

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+{
+  "name": "docker-setup-docker",
+  "description": "Set up Docker CE",
+  "main": "lib/main.js",
+  "scripts": {
+    "build": "ncc build src/main.ts --source-map --minify --license licenses.txt",
+    "lint": "eslint src/**/*.ts __tests__/**/*.ts",
+    "format": "eslint --fix src/**/*.ts __tests__/**/*.ts",
+    "test": "jest --coverage",
+    "all": "yarn run build && yarn run format && yarn test"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/crazy-max/ghaction-setup-docker.git"
+  },
+  "keywords": [
+    "actions",
+    "docker",
+    "engine"
+  ],
+  "author": "Docker",
+  "contributors": [
+    {
+      "name": "CrazyMax",
+      "url": "https://crazymax.dev"
+    }
+  ],
+  "license": "Apache-2.0",
+  "dependencies": {
+    "@actions/core": "^1.10.0",
+    "@docker/actions-toolkit": "link:../../docker_org/actions/docker-actions-toolkit"
+  },
+  "devDependencies": {
+    "@types/node": "^16.11.26",
+    "@typescript-eslint/eslint-plugin": "^5.14.0",
+    "@typescript-eslint/parser": "^5.14.0",
+    "@vercel/ncc": "^0.33.3",
+    "eslint": "^8.11.0",
+    "eslint-config-prettier": "^8.5.0",
+    "eslint-plugin-jest": "^26.1.1",
+    "eslint-plugin-prettier": "^4.0.0",
+    "jest": "^27.2.5",
+    "prettier": "^2.3.1",
+    "ts-jest": "^27.1.2",
+    "ts-node": "^10.7.0",
+    "typescript": "^4.4.4"
+  }
+}

src/context.ts

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+import * as core from '@actions/core';
+
+export interface Inputs {
+  version: string;
+}
+
+export function getInputs(): Inputs {
+  return {
+    version: core.getInput('version')
+  };
+}

src/main.ts

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+import * as context from './context';
+import * as core from '@actions/core';
+import * as actionsToolkit from '@docker/actions-toolkit';
+
+import {Install} from '../../../docker_org/actions/docker-actions-toolkit/lib/docker/install';
+import {Context} from '../../../docker_org/actions/docker-actions-toolkit/lib/context';
+import {Docker} from '../../../docker_org/actions/docker-actions-toolkit/lib/docker/docker';
+
+actionsToolkit.run(
+  // main
+  async () => {
+    const input: context.Inputs = context.getInputs();
+    const install = new Install();
+
+    let toolDir;
+    if (!(await Docker.isAvailable()) || input.version) {
+      await core.group(`Download docker`, async () => {
+        toolDir = await install.download(input.version || 'latest');
+      });
+    }
+    if (toolDir) {
+      await install.install(toolDir, Context.tmpDir(), input.version);
+    }
+
+    await core.group(`Docker info`, async () => {
+      await Docker.printVersion();
+      await Docker.printInfo();
+    });
+  }
+);

tsconfig.json

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+{
+  "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"
+  ]
+}