Initial version

.gitignore

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+__tests__/runner/*
+
+# Rest 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
+node_modules/
+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/

LICENSE

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+
+The MIT License (MIT)
+
+Copyright (c) 2019 actions-rs team and contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# `rustup toolchain` Action
+
+This GitHub Action installs [Rust toolchain](https://github.com/rust-lang/rustup.rs#toolchain-specification).
+
+Optionally it can set installed toolchain as a default and as an override for current directory.
+
+## Example workflow
+
+```yaml
+on: [push]
+
+name: build
+
+jobs:
+  check:
+    name: Rust project
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Install nightly
+        uses: actions-rs/toolchain@1
+        with:
+            toolchain: nightly
+            override: true
+```
+
+## Inputs
+
+* `toolchain`: Toolchain name, see [rustup page](https://github.com/rust-lang/rustup.rs#toolchain-specification) for details.\
+  Examples: `stable`, `nightly`, `nightly-2019-04-20`
+* `default`: Set installed toolchain as default (executes `rustup toolchain default {TOOLCHAIN}`)
+* `override`: Set installed toolchain as an override for current directory
+
+Note: `toolchain` input is required.

__tests__/args.test.ts

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+import * as args from '../src/args'
+
+const testEnvVars = {
+    INPUT_TOOLCHAIN: 'nightly-2019-04-20',
+    INPUT_DEFAULT: 'false',
+    INPUT_OVERRIDE: 'true'
+}
+
+describe('actions-rs/toolchain', () => {
+    beforeEach(() => {
+    for (const key in testEnvVars)
+        process.env[key] = testEnvVars[key as keyof typeof testEnvVars]
+    })
+
+    it('Parses action input into toolchain options', async () => {
+        const result = args.toolchain_args();
+
+        expect(result.name).toBe('nightly-2019-04-20');
+        expect(result.default).toBe(false);
+        expect(result.override).toBe(true);
+    });
+});

action.yml

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+name: 'rustup toolchain'
+description: 'Install the Rust toolchain'
+author: 'actions-rs team'
+branding:
+  icon: play-circle
+  color: black
+inputs:
+  toolchain:
+    description: |
+      Rust toolchain name.
+
+      See https://github.com/rust-lang/rustup.rs#toolchain-specification
+    required: true
+  default:
+    description: Set installed toolchain as default
+    default: false
+  override:
+    description: Set installed toolchain as an override for a directory
+    default: false
+
+runs:
+  using: 'node12'
+  main: 'dist/index.js'

jest.config.js

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+module.exports = {
+  clearMocks: true,
+  moduleFileExtensions: ['js', 'ts'],
+  testEnvironment: 'node',
+  testMatch: ['**/*.test.ts'],
+  testRunner: 'jest-circus/runner',
+  transform: {
+    '^.+\\.ts$': 'ts-jest'
+  },
+  verbose: true
+}

package.json

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+{
+    "name": "rustup-toolchain",
+    "version": "0.1.0",
+    "private": false,
+    "description": "Install the Rust toolchain",
+    "main": "lib/main.js",
+    "directories": {
+        "lib": "lib",
+        "test": "__tests__"
+    },
+    "scripts": {
+        "build": "ncc build src/main.ts --minify",
+        "watch": "ncc build src/main.ts --watch --minify",
+        "test": "jest"
+    },
+    "repository": {
+        "type": "git",
+        "url": "git+https://github.com/actions-rs/toolchain.git"
+    },
+    "keywords": [
+        "actions",
+        "rust",
+        "rustup",
+        "toolchain"
+    ],
+    "author": "actions-rs",
+    "license": "MIT",
+    "bugs": {
+        "url": "https://github.com/actions-rs/toolchain/issues"
+    },
+    "dependencies": {
+        "@actions/core": "^1.0.0",
+        "@actions/exec": "^1.0.0"
+    },
+    "devDependencies": {
+        "@types/jest": "^24.0.13",
+        "@types/node": "^12.7.5",
+        "@zeit/ncc": "^0.20.5",
+        "jest": "^24.9.0",
+        "jest-circus": "^24.9.0",
+        "ts-jest": "^24.0.2",
+        "typescript": "^3.5.1"
+    }
+}

src/args.ts

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+import * as core from '@actions/core';
+
+// Workaround for a GH bug: https://github.com/actions/toolkit/issues/127
+//
+// For input `all-features: true` it will generate the `INPUT_ALL-FEATURES: true`
+// env variable, which looks too weird.
+// Here we are trying to get proper name `INPUT_NO_DEFAULT_FEATURES` first,
+// and if it does not exist, trying the `INPUT_NO-DEFAULT-FEATURES`
+function getInput(name: string, options?: core.InputOptions): string {
+    const inputFullName = name.replace(/-/g, '_');
+    let value = core.getInput(inputFullName, options);
+    if (value.length > 0) {
+        return value
+    }
+
+    return core.getInput(name)
+}
+
+function inputBoolean(name: string): boolean {
+    const value = getInput(name);
+    if (value == 'true' || value == '1') {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+
+export interface ToolchainOptions {
+    name: string,
+    default: boolean,
+    override: boolean
+}
+
+export function toolchain_args(): ToolchainOptions {
+    return {
+        name: getInput('toolchain', {required: true}),
+        default: inputBoolean('default'),
+        override: inputBoolean('override')
+    }
+}

src/main.ts

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+import * as core from '@actions/core';
+import * as exec from '@actions/exec';
+
+import * as args from './args';
+
+async function do_exec(program: string, args: string[]) {
+    try {
+        await exec.exec(program, args);
+    } catch (error) {
+        core.setFailed(error.message);
+    }
+}
+
+async function run() {
+    let opts = args.toolchain_args();
+    await do_exec('rustup', ['toolchain', 'install', opts.name]);
+
+    if (opts.default) {
+        await do_exec('rustup', ['default', opts.name]);
+    }
+
+    if (opts.override) {
+        await do_exec('rustup', ['override', opts.name]);
+    }
+}
+
+run();

tsconfig.json

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+{
+  "compilerOptions": {
+    /* Basic Options */
+    // "incremental": true,                   /* Enable incremental compilation */
+    "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
+    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    // "allowJs": true,                       /* Allow javascript files to be compiled. */
+    // "checkJs": true,                       /* Report errors in .js files. */
+    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
+    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
+    // "outFile": "./",                       /* Concatenate and emit output to single file. */
+    "outDir": "./lib",                        /* Redirect output structure to the directory. */
+    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                     /* Enable project compilation */
+    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
+    // "removeComments": true,                /* Do not emit comments to output. */
+    // "noEmit": true,                        /* Do not emit outputs. */
+    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                           /* Enable all strict type-checking options. */
+    "noImplicitAny": false,                 /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,              /* Enable strict null checks. */
+    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                /* Report errors on unused locals. */
+    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+
+    /* Module Resolution Options */
+    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                       /* List of folders to include type definitions from. */
+    // "types": [],                           /* Type declaration files to be included in compilation. */
+    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
+    // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+  },
+  "exclude": ["node_modules", "**/*.test.ts"]
+}