add open collective funding

* feat: support to set architecture of SDK executable

* docs: update

* fix: try fix tests

* ci: set `fail-fast` to false

* fix: get latest version sdk

* fix: test any version

* fix: legacy version format

* fix: tests

* revert changes for `.github/workflows/workflow.yml`

* Update workflow.yml

* rename `ARCHITECTURE` to `ARCH`

* follow the existing spacing

* style: simplified code

* Update setup.sh

* style

.github/FUNDING.yml

@@ -0,0 +1 @@
+open_collective: flutter-action

.github/workflows/workflow.yml

@@ -1,22 +1,101 @@
 name: Main workflow
-on: [push]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 jobs:
-  run:
-    name: Run
+  test_channel:
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      matrix:
+        operating-system: [ubuntu-latest, windows-latest, macos-latest]
+        channel: [stable, beta]
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - uses: ./
+      with:
+        channel: ${{ matrix.channel }}
+    - name: Print FLUTTER_ROOT
+      shell: bash
+      run: echo "FLUTTER_ROOT set to $FLUTTER_ROOT"
+    - name: Print PUB_CACHE
+      shell: bash
+      run: echo "PUB_CACHE set to $PUB_CACHE"
+    - name: Run dart --version
+      shell: bash
+      run: dart --version
+    - name: Run flutter --version
+      shell: bash
+      run: flutter --version
+  test_version:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        version: [ 2.5.3, 2.x, 1, v1.12 ]
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - uses: ./
+      with:
+        channel: stable
+        flutter-version: ${{ matrix.version }}
+    - name: Run dart --version
+      shell: bash
+      run: dart --version
+    - name: Run flutter --version
+      shell: bash
+      run: flutter --version
+  test_master_channel:
+    runs-on: windows-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - uses: ./
+      with:
+        channel: master
+    - name: Run dart --version
+      shell: bash
+      run: dart --version
+    - name: Run flutter --version
+      shell: bash
+      run: flutter --version
+  test_any_channel:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - uses: ./
+      with:
+        channel: any
+        flutter-version: 2
+    - name: Run dart --version
+      shell: bash
+      run: dart --version
+    - name: Run flutter --version
+      shell: bash
+      run: flutter --version
+  test_cache:
     runs-on: ${{ matrix.operating-system }}
     strategy:
       matrix:
         operating-system: [ubuntu-latest, windows-latest, macos-latest]
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
-    - name: Set Node.js 10.x
-      uses: actions/setup-node@v1
+      uses: actions/checkout@v3
+    - uses: ./
       with:
-        node-version: 10.x
-    - name: npm install
-      run: npm install
-    - name: Lint
-      run: npm run format-check
-    - name: npm test
-      run: npm test
+        channel: stable
+        flutter-version: 2.5.0
+        cache: true
+        cache-key: key-20220113
+        cache-path: ${{ runner.tool_cache }}/flutter/2.5.0-stable
+    - name: Run dart --version
+      shell: bash
+      run: dart --version
+    - name: Run flutter --version
+      shell: bash
+      run: flutter --version

.gitignore

@@ -1,3 +0,0 @@
-node_modules/
-lib/
-__tests__/runner/*

.prettierrc.json

@@ -1,11 +0,0 @@
-{
-    "printWidth": 80,
-    "tabWidth": 2,
-    "useTabs": false,
-    "semi": true,
-    "singleQuote": true,
-    "trailingComma": "none",
-    "bracketSpacing": false,
-    "arrowParens": "avoid",
-    "parser": "typescript"
-  }

README.md

@@ -1,79 +1,165 @@
 # flutter-action
 
-This action sets up a flutter environment for use in actions. It works on Linux, Windows, and macOS.
+Flutter environment for use in GitHub Actions. It works on Linux, Windows, and macOS.
 
-# Usage
+## Usage
+
+Use specific version and channel:
 
 ```yaml
 steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-java@v1
+- uses: actions/checkout@v3
+- uses: subosito/flutter-action@v2
   with:
-    java-version: '12.x'
-- uses: subosito/flutter-action@v1
-  with:
-    flutter-version: '1.9.1+hotfix.6'
-- run: flutter pub get
-- run: flutter test
-- run: flutter build apk
+    flutter-version: '2.8.0'
+    channel: 'stable'
+- run: flutter --version
 ```
 
 Use latest release for particular channel:
 
 ```yaml
 steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-java@v1
+- uses: actions/checkout@v3
+- uses: subosito/flutter-action@v2
   with:
-    java-version: '12.x'
-- uses: subosito/flutter-action@v1
-  with:
-    channel: 'stable' # or: 'dev' or 'beta'
-- run: flutter pub get
-- run: flutter test
-- run: flutter build apk
+    channel: 'stable' # or: 'beta' or 'master'
+- run: flutter --version
 ```
 
 Use latest release for particular version and/or channel:
 
 ```yaml
 steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-java@v1
+- uses: actions/checkout@v3
+- uses: subosito/flutter-action@v2
   with:
-    java-version: '12.x'
-- uses: subosito/flutter-action@v1
+    flutter-version: '1.22.x' # or, you can use 1.22
+    channel: 'dev'
+- run: flutter --version
+```
+
+Use particular version on any channel:
+
+```yaml
+steps:
+- uses: actions/checkout@v3
+- uses: subosito/flutter-action@v2
   with:
-    flutter-version: '1.12.x' # you can use 1.12
-    channel: 'dev' # optional, default to: 'stable'
+    flutter-version: '2.x'
+    channel: 'any'
+- run: flutter --version
+```
+
+Build Android APK and app bundle:
+
+```yaml
+steps:
+- uses: actions/checkout@v3
+- uses: actions/setup-java@v2
+  with:
+    distribution: 'zulu'
+    java-version: '11'
+- uses: subosito/flutter-action@v2
+  with:
+    flutter-version: '2.10.4'
 - run: flutter pub get
 - run: flutter test
 - run: flutter build apk
+- run: flutter build appbundle
 ```
 
-Matrix Testing:
+Build for iOS (macOS only):
 
 ```yaml
 jobs:
-  test:
-    name: Test on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+  build:
+    runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-java@v1
-        with:
-          java-version: '12.x'
-      - uses: subosito/flutter-action@v1
-        with:
-          flutter-version: '1.11.0'
-          channel: 'beta'
-      - run: dart --version
-      - run: flutter --version
-      - run: flutter pub get
-      - run: flutter test
-      - run: flutter build apk
+    - uses: actions/checkout@v3
+    - uses: subosito/flutter-action@v2
+      with:
+        flutter-version: '2.10.4'
+        architecture: x64
+    - run: flutter pub get
+    - run: flutter test
+    - run: flutter build ios --release --no-codesign
 ```
 
+Build for the web:
+
+```yaml
+steps:
+- uses: actions/checkout@v3
+- uses: subosito/flutter-action@v2
+  with:
+    flutter-version: '2.10.4'
+- run: flutter pub get
+- run: flutter test
+- run: flutter build web
+```
+
+Build for Windows:
+
+```yaml
+jobs:
+ build:
+   runs-on: windows-latest
+   steps:
+     - uses: actions/checkout@v3
+     - uses: subosito/flutter-action@v2
+       with:
+         channel: 'beta'
+     - run: flutter config --enable-windows-desktop
+     - run: flutter build windows
+```
+
+Build for Linux desktop:
+
+```yaml
+jobs:
+ build:
+   runs-on: ubuntu-latest
+   steps:
+     - uses: actions/checkout@v3
+     - uses: subosito/flutter-action@v2
+       with:
+         channel: 'beta'
+     - run: |
+        sudo apt-get update -y
+        sudo apt-get install -y ninja-build libgtk-3-dev
+     - run: flutter config --enable-linux-desktop
+     - run: flutter build linux
+```
+
+Build for macOS desktop:
+
+```yaml
+jobs:
+ build:
+   runs-on: macos-latest
+   steps:
+     - uses: actions/checkout@v3
+     - uses: subosito/flutter-action@v2
+       with:
+         channel: 'beta'
+         architecture: x64
+     - run: flutter config --enable-macos-desktop
+     - run: flutter build macos
+```
+
+Integration with `actions/cache`:
+
+```yaml
+steps:
+- uses: actions/checkout@v3
+- uses: subosito/flutter-action@v2
+  with:
+    flutter-version: '2.10.x'
+    channel: 'stable'
+    cache: true
+    cache-key: flutter # optional, change this to force refresh cache
+    cache-path: ${{ runner.tool_cache }}/flutter # optional, change this to specify the cache path
+    architecture: x64 # optional, x64 or arm64
+- run: flutter --version
+```

__tests__/installer.test.ts

@@ -1,121 +0,0 @@
-import io = require('@actions/io');
-import fs = require('fs');
-import path = require('path');
-import nock = require('nock');
-
-const toolDir = path.join(__dirname, 'runner', 'tools');
-const tempDir = path.join(__dirname, 'runner', 'temp');
-const dataDir = path.join(__dirname, 'data');
-
-process.env['RUNNER_TOOL_CACHE'] = toolDir;
-process.env['RUNNER_TEMP'] = tempDir;
-
-import * as installer from '../src/installer';
-
-function osName(): string {
-  switch (process.platform) {
-    case 'win32':
-      return 'windows';
-    case 'darwin':
-      return 'macos';
-    default:
-      return process.platform;
-  }
-}
-
-describe('installer tests', () => {
-  beforeAll(async () => {
-    await io.rmRF(toolDir);
-    await io.rmRF(tempDir);
-  }, 100000);
-
-  afterEach(async () => {
-    await io.rmRF(toolDir);
-    await io.rmRF(tempDir);
-  }, 100000);
-
-  it('Downloads flutter', async () => {
-    await installer.getFlutter('1.0.0', 'stable');
-    const sdkDir = path.join(toolDir, 'flutter', '1.0.0-stable', 'x64');
-
-    expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-    expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-  }, 300000);
-
-  it('Downloads flutter from dev channel', async () => {
-    await installer.getFlutter('1.17.0-dev.5.0', 'dev');
-    const sdkDir = path.join(toolDir, 'flutter', '1.17.0-dev.5.0-dev', 'x64');
-
-    expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-    expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-  }, 300000);
-
-  describe('get the latest release of a flutter version', () => {
-    beforeEach(() => {
-      const platform = osName();
-      nock('https://storage.googleapis.com', {allowUnmocked: true})
-        .get(`/flutter_infra/releases/releases_${platform}.json`)
-        .replyWithFile(200, path.join(dataDir, `releases_${platform}.json`));
-    });
-
-    afterEach(() => {
-      nock.cleanAll();
-      nock.enableNetConnect();
-    });
-
-    it('Downloads latest flutter release from stable channel', async () => {
-      await installer.getFlutter('', 'stable');
-      const sdkDir = path.join(toolDir, 'flutter', '1.17.0-stable', 'x64');
-
-      expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-      expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-    }, 300000);
-
-    it('Downloads latest flutter release from beta channel (using new release format)', async () => {
-      await installer.getFlutter('', 'beta');
-      const sdkDir = path.join(
-        toolDir,
-        'flutter',
-        '1.17.0-3.4.pre-beta',
-        'x64'
-      );
-
-      expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-      expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-    }, 300000);
-
-    it('Downloads latest flutter release of 1.7 when using version 1.7 from dev channel', async () => {
-      await installer.getFlutter('1.7', 'dev');
-      const sdkDir = path.join(toolDir, 'flutter', '1.7.11-dev', 'x64');
-
-      expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-      expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-    }, 300000);
-
-    it('Downloads latest flutter release of 1.7 when using version 1.7.x from dev channel', async () => {
-      await installer.getFlutter('1.7.x', 'dev');
-      const sdkDir = path.join(toolDir, 'flutter', '1.7.11-dev', 'x64');
-
-      expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-      expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-    }, 300000);
-
-    it('Downloads latest flutter release of 1.17 when using version 1.17.x from dev channel (using new release format)', async () => {
-      await installer.getFlutter('1.17.x', 'dev');
-      const sdkDir = path.join(toolDir, 'flutter', '1.17.0-dev.5.0-dev', 'x64');
-
-      expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-      expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-    }, 300000);
-  });
-
-  it('Throws if no location contains correct flutter version', async () => {
-    let thrown = false;
-    try {
-      await installer.getFlutter('1000.0', 'dev');
-    } catch {
-      thrown = true;
-    }
-    expect(thrown).toBe(true);
-  });
-});

action.yml

@@ -1,17 +1,40 @@
 name: 'Flutter action'
 description: 'Setup your runner with Flutter environment'
 author: 'Alif Rachmawadi'
+branding:
+  icon: 'maximize'
+  color: 'blue'
 inputs:
   flutter-version:
     description: 'The Flutter version to make available on the path'
     required: false
+    default: 'any'
   channel:
     description: 'The Flutter build release channel'
     required: false
     default: 'stable'
+  cache:
+    description: 'Cache the Flutter SDK'
+    required: false
+  cache-key:
+    description: 'Identifier for the Flutter SDK cache'
+    required: false
+    default: 'flutter'
+  cache-path:
+    description: 'Flutter SDK cache path'
+    required: false
+    default: ${{ runner.tool_cache }}/flutter
+  architecture:
+    description: 'The architecture of Flutter SDK executable (x64 or arm64)'
+    required: false
+    default: 'x64'
 runs:
-  using: 'node12'
-  main: 'dist/index.js'
-branding:
-  icon: 'maximize'
-  color: 'blue'
+  using: 'composite'
+  steps:
+    - if: ${{ inputs.cache == 'true' }}
+      uses: actions/cache@v2
+      with:
+        path: ${{ inputs.cache-path }}
+        key: ${{ inputs.cache-key }}-${{ inputs.channel }}-${{ inputs.flutter-version }}
+    - run: $GITHUB_ACTION_PATH/setup.sh -c "${{ inputs.cache-path }}" ${{ inputs.channel }} ${{ inputs.flutter-version }} ${{ inputs.architecture }}
+      shell: bash

jest.config.js

@@ -1,11 +0,0 @@
-module.exports = {
-  clearMocks: true,
-  moduleFileExtensions: ['js', 'ts'],
-  testEnvironment: 'node',
-  testMatch: ['**/*.test.ts'],
-  testRunner: 'jest-circus/runner',
-  transform: {
-    '^.+\\.ts$': 'ts-jest'
-  },
-  verbose: true
-}

package.json

@@ -1,53 +0,0 @@
-{
-  "name": "flutter-action",
-  "version": "1.3.2",
-  "private": true,
-  "description": "Flutter environment for use in actions",
-  "main": "lib/index.js",
-  "scripts": {
-    "build-tsc": "tsc",
-    "build-ncc": "ncc build",
-    "build": "run-s build-tsc build-ncc",
-    "format": "prettier --write **/*.ts",
-    "format-check": "prettier --check **/*.ts",
-    "test": "jest"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/subosito/flutter-action.git"
-  },
-  "keywords": [
-    "actions",
-    "node",
-    "flutter",
-    "setup"
-  ],
-  "author": "Alif Rachmawadi <arch@subosito.com>",
-  "license": "MIT",
-  "dependencies": {
-    "@actions/core": "^1.2.4",
-    "@actions/exec": "^1.0.4",
-    "@actions/http-client": "^1.0.8",
-    "@actions/io": "^1.0.2",
-    "@actions/tool-cache": "^1.3.4",
-    "semver": "^7.3.2",
-    "uuid": "^7.0.3"
-  },
-  "devDependencies": {
-    "@types/jest": "^25.2.1",
-    "@types/node": "^12.12.38",
-    "@types/semver": "^7.1.0",
-    "@types/uuid": "^7.0.3",
-    "@zeit/ncc": "^0.22.1",
-    "jest": "^25.5.4",
-    "jest-circus": "^25.5.4",
-    "nock": "^12.0.3",
-    "npm-run-all": "^4.1.5",
-    "prettier": "^1.19.1",
-    "ts-jest": "^25.5.0",
-    "typescript": "^3.8.3"
-  },
-  "resolutions": {
-    "minimist": "^1.2.2"
-  }
-}

setup.sh

@@ -0,0 +1,122 @@
+#!/bin/bash
+
+OS_NAME=$(echo "$RUNNER_OS" | awk '{print tolower($0)}')
+MANIFEST_BASE_URL="https://storage.googleapis.com/flutter_infra_release/releases"
+MANIFEST_URL="${MANIFEST_BASE_URL}/releases_${OS_NAME}.json"
+
+# convert version like 2.5.x to 2.5
+normalize_version() {
+  if [[ $1 == *x ]]; then
+    echo ${1::-2}
+  else
+    echo $1
+  fi
+}
+
+latest_version() {
+  jq --arg channel "$1" --arg arch "$ARCH" '.releases | map(select(.channel==$channel) | select(.dart_sdk_arch == null or .dart_sdk_arch == $arch)) | first'
+}
+
+wildcard_version() {
+  if [ $2 == *"v"* ]; then  # is legacy version format
+    if [[ $1 == any ]]; then
+    jq --arg version "$2" '.releases | map(select(.version | startswith($version) )) | first'
+    else
+    jq --arg channel "$1" --arg version "$2" '.releases | map(select(.channel==$channel) | select(.version | startswith($version) )) | first'
+    fi
+  elif [[ $1 == any ]]; then
+    jq --arg version "$2" --arg arch "$ARCH" '.releases | map(select(.version | startswith($version)) | select(.dart_sdk_arch == null or .dart_sdk_arch == $arch)) | first'    
+  else
+    jq --arg channel "$1" --arg version "$2" --arg arch "$ARCH" '.releases | map(select(.channel==$channel) | select(.version | startswith($version) ) | select(.dart_sdk_arch == null or .dart_sdk_arch == $arch)) | first'
+  fi
+}
+
+get_version() {
+  if [[ $2 == any ]]; then
+    latest_version $1
+  else
+    wildcard_version $1 $2
+  fi
+}
+
+get_version_manifest() {
+  releases_manifest=$(curl --silent --connect-timeout 15 --retry 5 $MANIFEST_URL)
+  version_manifest=$(echo $releases_manifest | get_version $1 $(normalize_version $2))
+
+  if [[ $version_manifest == null ]]; then
+    # fallback through legacy version format
+    echo $releases_manifest | wildcard_version $1 "v$(normalize_version $2)"
+  else
+    echo $version_manifest
+  fi
+}
+
+download_archive() {
+  archive_url="$MANIFEST_BASE_URL/$1"
+  archive_name=$(basename $1)
+  archive_local="$RUNNER_TEMP/$archive_name"
+
+  curl --connect-timeout 15 --retry 5 $archive_url >$archive_local
+
+  # Create the target folder
+  mkdir -p "$2"
+
+  if [[ $archive_name == *zip ]]; then
+    unzip -q -o "$archive_local" -d "$RUNNER_TEMP"
+    # Remove the folder again so that the move command can do a simple rename
+    # instead of moving the content into the target folder.
+    # This is a little bit of a hack since the "mv --no-target-directory"
+    # linux option is not available here
+    rm -r "$2"
+    mv ${RUNNER_TEMP}/flutter "$2"
+  else
+    tar xf "$archive_local" -C "$2" --strip-components=1
+  fi
+
+  rm $archive_local
+}
+
+transform_path() {
+  if [[ $OS_NAME == windows ]]; then
+    echo $1 | sed -e 's/^\///' -e 's/\//\\/g'
+  else
+    echo $1
+  fi
+}
+
+CACHE_PATH=""
+
+while getopts 'c:' flag; do
+  case "${flag}" in
+  c) CACHE_PATH="$OPTARG" ;;
+  ?) exit 2 ;;
+  esac
+done
+
+CHANNEL="${@:$OPTIND:1}"
+VERSION="${@:$OPTIND+1:1}"
+ARCH="${@:$OPTIND+2:1}"
+
+SDK_CACHE="$(transform_path ${CACHE_PATH})"
+PUB_CACHE="$(transform_path ${CACHE_PATH}/.pub-cache)"
+
+if [[ ! -x "${SDK_CACHE}/bin/flutter" ]]; then
+  if [[ $CHANNEL == master ]]; then
+    git clone -b master https://github.com/flutter/flutter.git "$SDK_CACHE"
+  else
+    VERSION_MANIFEST=$(get_version_manifest $CHANNEL $VERSION)
+    if [[ $VERSION_MANIFEST == null ]]; then
+      echo "Unable to determine Flutter version for channel: $CHANNEL version: $VERSION architecture: $ARCH"
+      exit 1
+     fi
+    ARCHIVE_PATH=$(echo $VERSION_MANIFEST | jq -r '.archive')
+    download_archive "$ARCHIVE_PATH" "$SDK_CACHE"
+  fi
+fi
+
+echo "FLUTTER_ROOT=${SDK_CACHE}" >>$GITHUB_ENV
+echo "PUB_CACHE=${PUB_CACHE}" >>$GITHUB_ENV
+
+echo "${SDK_CACHE}/bin" >>$GITHUB_PATH
+echo "${SDK_CACHE}/bin/cache/dart-sdk/bin" >>$GITHUB_PATH
+echo "${PUB_CACHE}/bin" >>$GITHUB_PATH

src/index.ts

@@ -1,15 +0,0 @@
-import * as core from '@actions/core';
-import * as installer from './installer';
-
-async function run() {
-  try {
-    const version = core.getInput('flutter-version') || '';
-    const channel = core.getInput('channel') || 'stable';
-
-    await installer.getFlutter(version, channel);
-  } catch (error) {
-    core.setFailed(error.message);
-  }
-}
-
-run();

src/installer.ts

@@ -1,269 +0,0 @@
-import * as core from '@actions/core';
-import * as io from '@actions/io';
-import * as tc from '@actions/tool-cache';
-import * as fs from 'fs';
-import * as path from 'path';
-import * as httpm from '@actions/http-client';
-import * as semver from 'semver';
-
-const IS_WINDOWS = process.platform === 'win32';
-const IS_DARWIN = process.platform === 'darwin';
-const IS_LINUX = process.platform === 'linux';
-
-const storageUrl = 'https://storage.googleapis.com/flutter_infra/releases';
-
-let tempDirectory = process.env['RUNNER_TEMP'] || '';
-
-if (!tempDirectory) {
-  let baseLocation;
-
-  if (IS_WINDOWS) {
-    baseLocation = process.env['USERPROFILE'] || 'C:\\';
-  } else {
-    if (process.platform === 'darwin') {
-      baseLocation = '/Users';
-    } else {
-      baseLocation = '/home';
-    }
-  }
-
-  tempDirectory = path.join(baseLocation, 'actions', 'temp');
-}
-
-export async function getFlutter(
-  version: string,
-  channel: string
-): Promise<void> {
-  const versionPart = version.split('.').filter(Boolean);
-
-  if (
-    versionPart.length > 0 &&
-    (versionPart[1] == null || versionPart[2] == null)
-  ) {
-    version = version.concat('.x');
-  }
-
-  const {version: selected, rawVersion, downloadUrl} = await determineVersion(
-    version,
-    channel
-  );
-
-  let cleanver = `${selected.replace('+', '-')}-${channel}`;
-  let toolPath = tc.find('flutter', cleanver);
-
-  if (toolPath) {
-    core.debug(`Tool found in cache ${toolPath}`);
-  } else {
-    core.debug('Downloading Flutter from Google storage');
-
-    const sdkFile = await tc.downloadTool(downloadUrl);
-
-    let tempDir: string = generateTempDir();
-    const sdkDir = await extractDownload(sdkFile, tempDir);
-    core.debug(`Flutter sdk extracted to ${sdkDir}`);
-
-    toolPath = await tc.cacheDir(sdkDir, 'flutter', cleanver);
-  }
-
-  core.exportVariable('FLUTTER_HOME', toolPath);
-  core.addPath(path.join(toolPath, 'bin'));
-  core.addPath(path.join(toolPath, 'bin', 'cache', 'dart-sdk', 'bin'));
-}
-
-function osName(): string {
-  if (IS_DARWIN) return 'macos';
-  if (IS_WINDOWS) return 'windows';
-
-  return process.platform;
-}
-
-function extName(): string {
-  if (IS_LINUX) return 'tar.xz';
-
-  return 'zip';
-}
-
-function generateTempDir(): string {
-  return path.join(
-    tempDirectory,
-    'temp_' + Math.floor(Math.random() * 2000000000)
-  );
-}
-
-async function extractDownload(
-  sdkFile: string,
-  destDir: string
-): Promise<string> {
-  await io.mkdirP(destDir);
-
-  const sdkPath = path.normalize(sdkFile);
-  const stats = fs.statSync(sdkPath);
-
-  if (stats.isFile()) {
-    await extractFile(sdkFile, destDir);
-
-    const sdkDir = path.join(destDir, fs.readdirSync(destDir)[0]);
-
-    return sdkDir;
-  } else {
-    throw new Error(`Flutter sdk argument ${sdkFile} is not a file`);
-  }
-}
-
-async function extractFile(file: string, destDir: string): Promise<void> {
-  const stats = fs.statSync(file);
-
-  if (!stats) {
-    throw new Error(`Failed to extract ${file} - it doesn't exist`);
-  } else if (stats.isDirectory()) {
-    throw new Error(`Failed to extract ${file} - it is a directory`);
-  }
-
-  if ('tar.xz' === extName()) {
-    await tc.extractTar(file, destDir, 'x');
-  } else {
-    await tc.extractZip(file, destDir);
-  }
-}
-
-async function determineVersion(
-  version: string,
-  channel: string
-): Promise<{version: string; rawVersion: string; downloadUrl: string}> {
-  if (version.endsWith('.x') || version === '') {
-    return await getLatestVersion(version, channel);
-  }
-
-  return await getSelectedVersion(version, channel);
-}
-
-interface IFlutterChannel {
-  [key: string]: string;
-  beta: string;
-  dev: string;
-  stable: string;
-}
-
-interface IFlutterRelease {
-  hash: string;
-  channel: string;
-  version: string;
-  archive: string;
-}
-
-interface IFlutterStorage {
-  current_release: IFlutterChannel;
-  releases: IFlutterRelease[];
-}
-
-async function getReleases(): Promise<IFlutterStorage> {
-  const releasesUrl: string = `${storageUrl}/releases_${osName()}.json`;
-  const http: httpm.HttpClient = new httpm.HttpClient('flutter-action');
-  const storage: IFlutterStorage | null = (
-    await http.getJson<IFlutterStorage | null>(releasesUrl)
-  ).result;
-
-  if (!storage) {
-    throw new Error('unable to get flutter releases');
-  }
-
-  return storage;
-}
-
-async function getSelectedVersion(
-  version: string,
-  channel: string
-): Promise<{version: string; rawVersion: string; downloadUrl: string}> {
-  const storage = await getReleases();
-  const release = storage.releases.find(release => {
-    if (release.channel != channel) return false;
-    return compare(version, release.version);
-  });
-
-  if (!release) {
-    throw new Error(`invalid flutter version ${version}, channel ${channel}`);
-  }
-
-  return {
-    version,
-    rawVersion: release.version,
-    downloadUrl: `${storageUrl}/${release.archive}`
-  };
-}
-
-async function getLatestVersion(
-  version: string,
-  channel: string
-): Promise<{version: string; rawVersion: string; downloadUrl: string}> {
-  const storage = await getReleases();
-
-  if (version.endsWith('.x')) {
-    const sver = version.slice(0, version.length - 2);
-    const releases = storage.releases.filter(release => {
-      if (release.channel != channel) return false;
-      return prefixCompare(sver, release.version);
-    });
-
-    const versions = releases
-      .map(release => release.version)
-      .map(version =>
-        version.startsWith('v') ? version.slice(1, version.length) : version
-      );
-
-    const sortedVersions = versions.sort(semver.rcompare);
-
-    let cver = sortedVersions[0];
-    let release = releases.find(release => compare(cver, release.version));
-
-    if (!release) {
-      throw new Error(`unable to find release for ${cver}`);
-    }
-
-    core.debug(
-      `latest version of ${version} from channel ${channel} is ${release.version}`
-    );
-
-    return {
-      version: cver,
-      rawVersion: release.version,
-      downloadUrl: `${storageUrl}/${release.archive}`
-    };
-  }
-
-  const channelVersion = storage.releases.find(release => {
-    return (
-      release.hash === storage.current_release[channel] &&
-      release.channel == channel
-    );
-  });
-
-  if (!channelVersion) {
-    throw new Error(`unable to get latest version from channel ${channel}`);
-  }
-
-  let rver = channelVersion.version;
-  let cver = rver.startsWith('v') ? rver.slice(1, rver.length) : rver;
-
-  core.debug(`latest version from channel ${channel} is ${rver}`);
-  return {
-    version: cver,
-    rawVersion: rver,
-    downloadUrl: `${storageUrl}/${channelVersion.archive}`
-  };
-}
-
-function compare(version: string, releaseVersion: string): boolean {
-  if (releaseVersion.startsWith('v')) {
-    return releaseVersion === `v${version}`;
-  }
-
-  return releaseVersion === version;
-}
-
-function prefixCompare(version: string, releaseVersion: string): boolean {
-  if (releaseVersion.startsWith('v')) {
-    return releaseVersion.startsWith(`v${version}`);
-  }
-
-  return releaseVersion.startsWith(version);
-}

tsconfig.json

@@ -1,11 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "es6",
-    "module": "commonjs",
-    "outDir": "./lib",
-    "rootDir": "./src",
-    "strict": true,
-    "esModuleInterop": true
-  },
-  "exclude": ["node_modules", "**/*.test.ts"]
-}