use env if it existed (#360)

* Update Flock's git URL in README

* Update Flock's git URL in code sample

.github/FUNDING.yaml

@@ -0,0 +1 @@
+github: [subosito]

.github/workflows/workflow.yaml

@@ -0,0 +1,278 @@
+name: test
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+      - dev
+  pull_request:
+    paths:
+      - setup.sh
+      - action.yaml
+      - .github/workflows/workflow.yaml
+jobs:
+  lint_shellcheck:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - name: Run shellcheck
+        uses: ludeeus/action-shellcheck@master
+
+  test_channel:
+    runs-on: ${{ matrix.operating-system }}
+
+    strategy:
+      matrix:
+        operating-system:
+          - ubuntu-latest
+          - windows-latest
+          - macos-latest
+          - macos-13
+        channel: [stable, beta, master]
+        dry-run: [true, false]
+        git-source:
+          - https://github.com/flutter/flutter.git
+          - https://github.com/Flutter-Foundation/flutter.git
+          - https://gitee.com/harmonycommando_flutter/flutter.git
+        include:
+          - operating-system: ubuntu-latest
+            channel: main
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - id: flutter-action
+        uses: ./
+        with:
+          channel: ${{ matrix.channel }}
+          dry-run: ${{ matrix.dry-run }}
+          git-source: ${{ matrix.git-source }}
+      - name: Echo outputs
+        run: |
+          echo RUNNER-OS=${{ runner.os }}
+          echo RUNNER-ARCH=${{ runner.arch }}
+
+          echo CACHE-PATH=${{ steps.flutter-action.outputs.CACHE-PATH }}
+          echo CACHE-KEY=${{ steps.flutter-action.outputs.CACHE-KEY }}
+          echo CHANNEL=${{ steps.flutter-action.outputs.CHANNEL }}
+          echo VERSION=${{ steps.flutter-action.outputs.VERSION }}
+          echo ARCHITECTURE=${{ steps.flutter-action.outputs.ARCHITECTURE }}
+        shell: bash
+      - run: dart --version
+        if: ${{ matrix.dry-run != true }}
+        shell: bash
+      - run: flutter --version
+        if: ${{ matrix.dry-run != true }}
+        shell: bash
+      - run: "! dart --version"
+        if: ${{ matrix.dry-run == true }}
+        shell: bash
+      - run: "! flutter --version"
+        if: ${{ matrix.dry-run == true }}
+        shell: bash
+
+  test_cache:
+    runs-on: ${{ matrix.operating-system }}
+
+    strategy:
+      matrix:
+        operating-system:
+          [ubuntu-latest, windows-latest, macos-latest, macos-13]
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - uses: ./
+        with:
+          channel: stable
+          flutter-version: 3.10.6
+          cache: true
+      - run: dart --version
+        shell: bash
+      - run: flutter --version
+        shell: bash
+
+  test_version_file:
+    runs-on: ${{ matrix.operating-system }}
+
+    strategy:
+      matrix:
+        operating-system: [ubuntu-latest]
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - uses: ./
+        with:
+          channel: stable
+          flutter-version-file: test/pubspec.yaml
+      - name: Verify Dart version
+        run: dart --version | grep '2.18.6'
+        shell: bash
+      - name: Verify Flutter version
+        run: flutter --version | grep '3.3.10'
+        shell: bash
+
+  test_print_output_x64:
+    runs-on: ubuntu-latest
+
+    # These calls to setup.sh sepcify the -t flag, which enables test mode.
+    # Test mode uses hardcoded Flutter release manifests from test/ directory.
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - run: ./setup.sh -t -p -f test/pubspec.yaml   | grep '3.3.10'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep 'stable'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep '3.7.7'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep 'x64'
+        shell: bash
+      - run: ./setup.sh -t -p stable                 | grep 'stable'
+        shell: bash
+      - run: ./setup.sh -t -p beta                   | grep 'beta'
+        shell: bash
+      - run: ./setup.sh -t -p beta                   | grep '3.9.0-0.1.pre'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3.3.10 stable       | grep '3.3.10'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3.3.1 stable        | grep '3.3.1'
+        shell: bash
+      - run: ./setup.sh -t -p -n 2 stable            | grep '2.10.5'
+        shell: bash
+      - run: ./setup.sh -t -p -n 2 beta              | grep '2.13.0-0.4.pre'
+        shell: bash
+      - run: ./setup.sh -t -p -n 2 any               | grep 'beta'
+        shell: bash
+      - run: ./setup.sh -t -p -n 2 any               | grep '2.13.0-0.4.pre'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3 any               | grep 'beta'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3 any               | grep '3.9.0-0.1.pre'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3 any               | grep 'x64'
+        shell: bash
+      - run: ./setup.sh -t -p -n any stable          | grep 'stable'
+        shell: bash
+      - run: ./setup.sh -t -p -n any stable          | grep '3.7.7'
+        shell: bash
+      - run: ./setup.sh -t -p -n any stable          | grep 'x64'
+        shell: bash
+      - run: ./setup.sh -t -p -n 1 stable            | grep '1.22.6'
+        shell: bash
+      - run: ./setup.sh -t -p -n 0 any               | grep 'beta'
+        shell: bash
+      - run: ./setup.sh -t -p -n 0 any               | grep '0.11.13'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep 'flutter-linux-stable-3.7.7-x64-2ad6cd72c040113b47ee9055e722606a490ef0da'
+        shell: bash
+      - run: ./setup.sh -t -p stable                 | grep 'flutter-linux-stable-3.7.7-x64-2ad6cd72c040113b47ee9055e722606a490ef0da'
+        shell: bash
+      - run: ./setup.sh -t -p beta                   | grep 'flutter-linux-beta-3.9.0-0.1.pre-x64-f732038a8cf4562ce38a1d7debb30209ae3da896'
+        shell: bash
+      - run: ./setup.sh -t -p dev                    | grep 'flutter-linux-dev-2.13.0-0.1.pre-x64-13a2fb10b838971ce211230f8ffdd094c14af02c'
+        shell: bash
+      - run: ./setup.sh -t -p master                 | grep 'flutter-linux-master-any-x64-master'
+        shell: bash
+      - run: ./setup.sh -t -p -n 5b12b74 master      | grep 'flutter-linux-master-5b12b74-x64-master'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3.12.0-12.0.pre master     | grep 'flutter-linux-master-3.12.0-12.0.pre-x64-master'
+        shell: bash
+      - run: ./setup.sh -t -p -n stable master       | grep 'flutter-linux-master-stable-x64-master'
+        shell: bash
+      - run: ./setup.sh -t -p -n 2 any               | grep 'flutter-linux-beta-2.13.0-0.4.pre-x64-25caf1461b8f643092a9f6f5b224453b5c057d10'
+        shell: bash
+      - run: ./setup.sh -t -p -n 1 any               | grep 'flutter-linux-beta-1.26.0-17.8.pre-x64-044f2cf5607a26f8818dab0f766400e85c52bdff'
+        shell: bash
+      - run: ./setup.sh -t -p -n 0 any               | grep 'flutter-linux-beta-0.11.13-x64-58c8489fcdb4e4ef6c010117584c9b23d15221aa'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep '/opt/hostedtoolcache/flutter/stable-3.7.7-x64'
+        shell: bash
+      - run: ./setup.sh -t -p stable                 | grep '/opt/hostedtoolcache/flutter/stable-3.7.7-x64'
+        shell: bash
+      - run: ./setup.sh -t -p beta                   | grep '/opt/hostedtoolcache/flutter/beta-3.9.0-0.1.pre-x64'
+        shell: bash
+      - run: ./setup.sh -t -p dev                    | grep '/opt/hostedtoolcache/flutter/dev-2.13.0-0.1.pre-x64'
+        shell: bash
+      - run: ./setup.sh -t -p master                 | grep '/opt/hostedtoolcache/flutter/master-any-x64'
+        shell: bash
+      - run: ./setup.sh -t -p -k 'custom-:channel:-:version:-:hash:'       | grep 'custom-stable-3.7.7-2ad6cd72c040113b47ee9055e722606a490ef0da'
+        shell: bash
+      - run: ./setup.sh -t -p -k 'custom-:channel:-:version:-:sha256:'     | grep 'custom-stable-3.7.7-cdd49597e88c35e5de5184e9acff433dfbb3c075b74ef7b27790af7f57ce2420'
+        shell: bash
+      - run: ./setup.sh -t -p -c '/tmp/flutter/:channel:-:version:-:hash:' | grep '/tmp/flutter/stable-3.7.7-2ad6cd72c040113b47ee9055e722606a490ef0da'
+        shell: bash
+
+
+  test_print_output_arm64:
+    runs-on: macos-latest
+
+    # These calls to setup.sh sepcify the -t flag, which enables test mode.
+    # Test mode uses hardcoded Flutter release manifests from test/ directory.
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - run: ./setup.sh -t -p -f test/pubspec.yaml   | grep '3.3.10'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep 'stable'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep '3.7.7'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep 'arm64'
+        shell: bash
+      - run: ./setup.sh -t -p stable                 | grep 'stable'
+        shell: bash
+      - run: ./setup.sh -t -p beta                   | grep 'beta'
+        shell: bash
+      - run: ./setup.sh -t -p beta                   | grep '3.9.0-0.1.pre'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3.3.10 stable       | grep '3.3.10'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3.3.1 stable        | grep '3.3.1'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3 any               | grep 'beta'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3 any               | grep '3.9.0-0.1.pre'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3 -a arm64 any      | grep 'arm64'
+        shell: bash
+      - run: ./setup.sh -t -p -n any -a arm64 stable | grep 'stable'
+        shell: bash
+      - run: ./setup.sh -t -p -n any -a arm64 stable | grep '3.7.7'
+        shell: bash
+      - run: ./setup.sh -t -p -n any -a arm64 stable | grep 'arm64'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep 'flutter-macos-stable-3.7.7-arm64-2ad6cd72c040113b47ee9055e722606a490ef0da'
+        shell: bash
+      - run: ./setup.sh -t -p stable                 | grep 'flutter-macos-stable-3.7.7-arm64-2ad6cd72c040113b47ee9055e722606a490ef0da'
+        shell: bash
+      - run: ./setup.sh -t -p beta                   | grep 'flutter-macos-beta-3.9.0-0.1.pre-arm64-8b9b90e75107181aadc303d8d7422205863a35dd'
+        shell: bash
+      - run: ./setup.sh -t -p master                 | grep 'flutter-macos-master-any-arm64-master'
+        shell: bash
+      - run: ./setup.sh -t -p -n 5b12b74 master      | grep 'flutter-macos-master-5b12b74-arm64-master'
+        shell: bash
+      - run: ./setup.sh -t -p -n 3.12.0-12.0.pre master     | grep 'flutter-macos-master-3.12.0-12.0.pre-arm64-master'
+        shell: bash
+      - run: ./setup.sh -t -p -n stable master       | grep 'flutter-macos-master-stable-arm64-master'
+        shell: bash
+      - run: ./setup.sh -t -p                        | grep '/Users/runner/hostedtoolcache/flutter/stable-3.7.7-arm64'
+        shell: bash
+      - run: ./setup.sh -t -p stable                 | grep '/Users/runner/hostedtoolcache/flutter/stable-3.7.7-arm64'
+        shell: bash
+      - run: ./setup.sh -t -p beta                   | grep '/Users/runner/hostedtoolcache/flutter/beta-3.9.0-0.1.pre-arm64'
+        shell: bash
+      - run: ./setup.sh -t -p master                 | grep '/Users/runner/hostedtoolcache/flutter/master-any-arm64'
+        shell: bash
+      - run: ./setup.sh -t -p -k 'custom-:channel:-:version:-:hash:'       | grep 'custom-stable-3.7.7-2ad6cd72c040113b47ee9055e722606a490ef0da'
+        shell: bash
+      - run: ./setup.sh -t -p -k 'custom-:channel:-:version:-:sha256:'     | grep 'custom-stable-3.7.7-0511b9f164a62f467b063e6c83d9c683bb3fb056ee556b2f45e987a2c2f4a260'
+        shell: bash
+      - run: ./setup.sh -t -p -c '/tmp/flutter/:channel:-:version:-:hash:' | grep '/tmp/flutter/stable-3.7.7-2ad6cd72c040113b47ee9055e722606a490ef0da'
+        shell: bash

.github/workflows/workflow.yml

@@ -1,22 +0,0 @@
-name: Main workflow
-on: [push]
-jobs:
-  run:
-    name: Run
-    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
-      with:
-        node-version: 10.x
-    - name: npm install
-      run: npm install
-    - name: Lint
-      run: npm run format-check
-    - name: npm test
-      run: npm test

.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

@@ -1,77 +1,385 @@
 # 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
+Originally created by [Alif Rachmawadi]. Maintained by [Bartek Pacia].
+
+The following sections show how to configure this action.
+
+## Specifying Flutter version
+
+### Use specific version and channel
 
 ```yaml
 steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-java@v1
-  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
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      channel: stable
+      flutter-version: 3.19.0
+  - run: flutter --version
 ```
 
-Use latest release for particular channel:
+### Use version from pubspec.yaml
+
+This is inspired by [`actions/setup-go`](https://github.com/actions/setup-go).
 
 ```yaml
 steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-java@v1
-  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
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      channel: stable
+      flutter-version-file: pubspec.yaml # path to pubspec.yaml
+  - run: flutter --version
 ```
 
-Use latest release for particular version and/or channel:
+> [!IMPORTANT]
+>
+> For `flutter-version-file` to work, you need to have the exact Flutter version
+> defined in your pubspec.yaml:
+>
+> **Good**
+>
+> ```yaml
+> environment:
+>   sdk: ">=3.3.0 <4.0.0"
+>   flutter: 3.19.0
+> ```
+>
+> **Bad**
+>
+> ```yaml
+> environment:
+>   sdk: ">=3.3.0 <4.0.0"
+>   flutter: ">= 3.19.0 <4.0.0"
+> ```
+
+> [!NOTE]
+>
+> Using `flutter-version-file` requires [`yq`](https://github.com/mikefarah/yq),
+> which is not pre-installed in `windows` runners. Fortunately, since version
+> 2.18.0, this action installs `yq` automatically if `flutter-version-file`
+> is specified, so no action is required from you.
+
+### Use latest release for particular channel
 
 ```yaml
 steps:
-- uses: actions/checkout@v1
-- uses: actions/setup-java@v1
-  with:
-    java-version: '12.x'
-- uses: subosito/flutter-action@v1
-  with:
-    flutter-version: '1.12.x' # you can use 1.12
-    channel: 'dev' # optional, default to: 'stable'
-- run: flutter pub get
-- run: flutter test
-- run: flutter build apk
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      channel: stable # or: beta, master (or main)
+  - run: flutter --version
 ```
 
-Matrix Testing:
+### Use latest release for particular version and/or channel
+
+```yaml
+steps:
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      channel: dev
+      flutter-version: 1.22.x
+  - run: flutter --version
+```
+
+### Use particular version on any channel
+
+```yaml
+steps:
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      channel: any
+      flutter-version: 3.x
+  - run: flutter --version
+```
+
+### Use particular git reference on master channel
+
+```yaml
+steps:
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      channel: master
+      flutter-version: 5b12b74 # tag, commit or branch
+  - run: flutter --version
+```
+
+### Use a Flutter mirror by set ENV
+
+You can get more infomation from [Flutter official docs](https://docs.flutter.dev/community/china).
+
+```yaml
+steps:
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    env:
+      FLUTTER_STORAGE_BASE_URL: https://storage.flutter-io.cn
+    uses: subosito/flutter-action@v2
+    with:
+      channel: master
+      flutter-version: 5b12b74 # tag, commit or branch
+  - run: flutter --version
+```
+
+### Use alternative Flutter repository
+
+This action supports "alternative Flutters" in addition to the official
+[`flutter/flutter`](https://github.com/flutter/flutter), for example:
+- [Flock](https://github.com/join-the-flock/flock.git)
+- [a Flutter fork that supports
+  HarmonyOS](https://gitee.com/harmonycommando_flutter/flutter.git)
+
+```yaml
+steps:
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      channel: master
+      flutter-version: 3.24.0
+      git-source: https://github.com/join-the-flock/flock.git
+  - run: flutter --version
+```
+
+> [!NOTE]
+>
+> This feature was implemented in
+> [#344](https://github.com/subosito/flutter-action/pull/334) and is available
+> since v2.18.0.
+
+### Apply a patch
+
+Sometimes you find a bug in Flutter and you fix it yourself (you're a
+rockstar!), and then submit a patch/PR to Flutter repository. However, everyone
+knows that code review takes time, but your app needs the fix _now_.
+
+You can apply your patch like this:
+
+```yaml
+steps:
+- name: Clone repository
+  uses: actions/checkout@v4
+- uses: subosito/flutter-action@v2
+  with:
+    flutter-version: 3.22.2
+    channel: stable
+- run: |
+    flutter --version
+    cd ${{ env.FLUTTER_ROOT }}
+    curl https://patch-diff.githubusercontent.com/raw/flutter/flutter/pull/137874.patch | git apply
+    git status
+```
+
+> [!NOTE]
+>
+> This was first discussed in [this issue](https://github.com/subosito/flutter-action/issues/310).
+
+## Build targets
+
+Build **Android** APK and app bundle:
+
+```yaml
+steps:
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      flutter-version: 3.24.0
+  - run: flutter pub get
+  - run: flutter test
+  - run: flutter build apk
+  - run: flutter build appbundle
+```
+
+### Build for iOS
+
+> [!NOTE]
+>
+> Building for iOS requires a macOS runner.
 
 ```yaml
 jobs:
-  test:
-    name: Test on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+  main:
+    runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-java@v1
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v2
         with:
-          java-version: '12.x'
-      - uses: subosito/flutter-action@v1
-        with:
-          flutter-version: '1.11.0'
-          channel: 'beta'
+          channel: stable
       - run: flutter pub get
       - run: flutter test
-      - run: flutter build apk
+      - run: flutter build ios --release --no-codesign
 ```
 
+### Build for the web
+
+```yaml
+steps:
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      channel: stable
+  - run: flutter pub get
+  - run: flutter test
+  - run: flutter build web
+```
+
+### Build for Windows
+
+```yaml
+jobs:
+  main:
+    runs-on: windows-latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+      - run: flutter build windows
+```
+
+### Build for Linux desktop
+
+```yaml
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+      - run: |
+          sudo apt-get update -y
+          sudo apt-get install -y ninja-build libgtk-3-dev
+      - run: flutter build linux
+```
+
+### Build for macOS desktop
+
+> [!NOTE]
+>
+> Building for macOS requires a macOS runner.
+
+```yaml
+jobs:
+  main:
+    runs-on: macos-latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+      - run: flutter build macos
+```
+
+## Caching
+
+Integration with [`actions/cache`](https://github.com/actions/cache):
+
+```yaml
+steps:
+  - name: Clone repository
+    uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    with:
+      channel: stable
+      cache: true
+      # optional parameters follow
+      cache-key: "flutter-:os:-:channel:-:version:-:arch:-:hash:" # optional, change this to force refresh cache
+      cache-path: "${{ runner.tool_cache }}/flutter/:channel:-:version:-:arch:" # optional, change this to specify the cache path
+      pub-cache-key: "flutter-pub:os:-:channel:-:version:-:arch:-:hash:" # optional, change this to force refresh cache of dart pub get dependencies
+      pub-cache-path: "${{ runner.tool_cache }}/flutter/:channel:-:version:-:arch:" # optional, change this to specify the cache path
+  - run: flutter --version
+```
+
+Note: `cache-key`, `pub-cache-key`, and `cache-path` have support for several
+dynamic values:
+
+- `:os:`
+- `:channel:`
+- `:version:`
+- `:arch:`
+- `:hash:`
+- `:sha256:`
+
+Use outputs from `flutter-action`:
+
+```yaml
+steps:
+  - name: Clone repository
+  - uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    id: flutter-action
+    with:
+      channel: stable
+  - name: Print outputs
+    shell: bash
+    run: |
+      echo CACHE-PATH=${{ steps.flutter-action.outputs.CACHE-PATH }}
+      echo CACHE-KEY=${{ steps.flutter-action.outputs.CACHE-KEY }}
+      echo CHANNEL=${{ steps.flutter-action.outputs.CHANNEL }}
+      echo VERSION=${{ steps.flutter-action.outputs.VERSION }}
+      echo ARCHITECTURE=${{ steps.flutter-action.outputs.ARCHITECTURE }}
+      echo PUB-CACHE-PATH=${{ steps.flutter-action.outputs.PUB-CACHE-PATH }}
+      echo PUB-CACHE-KEY=${{ steps.flutter-action.outputs.PUB-CACHE-KEY }}
+```
+
+If you don't need to install Flutter and just want the outputs, you can use the
+`dry-run` option:
+
+```yaml
+steps:
+  - name: Clone repository
+  - uses: actions/checkout@v4
+  - name: Set up Flutter
+    uses: subosito/flutter-action@v2
+    id: flutter-action
+    with:
+      channel: stable
+      dry-run: true
+  - run: |
+      echo CACHE-PATH=${{ steps.flutter-action.outputs.CACHE-PATH }}
+      echo CACHE-KEY=${{ steps.flutter-action.outputs.CACHE-KEY }}
+      echo CHANNEL=${{ steps.flutter-action.outputs.CHANNEL }}
+      echo VERSION=${{ steps.flutter-action.outputs.VERSION }}
+      echo ARCHITECTURE=${{ steps.flutter-action.outputs.ARCHITECTURE }}
+      echo PUB-CACHE-PATH=${{ steps.flutter-action.outputs.PUB-CACHE-PATH }}
+      echo PUB-CACHE-KEY=${{ steps.flutter-action.outputs.PUB-CACHE-KEY }}
+    shell: bash
+```
+[Alif Rachmawadi]: https://github.com/subosito
+[Bartek Pacia]: https://github.com/bartekpacia

__tests__/installer.test.ts

@@ -1,109 +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);
-  }, 300000);
-
-  afterAll(async () => {
-    try {
-      await io.rmRF(toolDir);
-      await io.rmRF(tempDir);
-    } catch {
-      console.log('Failed to remove test directories');
-    }
-  }, 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(`${sdkDir}.complete`)).toBe(true);
-    expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-  }, 100000);
-
-  it('Downloads flutter from beta channel', async () => {
-    await installer.getFlutter('1.8.3', 'beta');
-    const sdkDir = path.join(toolDir, 'flutter', '1.8.3-beta', 'x64');
-
-    expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-    expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-  }, 100000);
-
-  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',
-        '1.7.8-hotfix.4-stable',
-        'x64'
-      );
-
-      expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-      expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-    }, 200000);
-
-    it('Downloads latest flutter release of 1.7 when using version 1.7 from dev channel', async () => {
-      await installer.getFlutter('1.7', 'dev');
-      const sdkDir = path.join(toolDir, 'flutter', '1.7.11-dev', 'x64');
-
-      expect(fs.existsSync(`${sdkDir}.complete`)).toBe(true);
-      expect(fs.existsSync(path.join(sdkDir, 'bin'))).toBe(true);
-    }, 200000);
-
-    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);
-    }, 200000);
-  });
-
-  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.yaml

@@ -0,0 +1,134 @@
+name: Set up Flutter
+description: Setup your runner with Flutter environment
+author: Alif Rachmawadi
+branding:
+  icon: maximize
+  color: blue
+
+inputs:
+  channel:
+    description: The Flutter build release channel
+    required: false
+    default: stable
+  flutter-version:
+    description: The Flutter version to make available on the path
+    required: false
+    default: ""
+  flutter-version-file:
+    description: The pubspec.yaml file with exact Flutter version defined
+    required: false
+    default: ""
+  architecture:
+    description: The architecture of Flutter SDK executable (x64 or arm64)
+    required: false
+    default: "${{ runner.arch }}"
+  cache:
+    description: Cache the Flutter SDK
+    required: false
+    default: "false"
+  cache-key:
+    description: Identifier for the Flutter SDK cache
+    required: false
+    default: ""
+  cache-path:
+    description: Flutter SDK cache path
+    required: false
+    default: ""
+  pub-cache-key:
+    description: Identifier for the Dart .pub-cache cache
+    required: false
+    default: ""
+  pub-cache-path:
+    description: Flutter pub cache path
+    required: false
+    default: default
+  dry-run:
+    description: If true, get outputs but do not install Flutter
+    required: false
+    default: "false"
+  git-source:
+    description: Git clone source
+    required: false
+    default: "https://github.com/flutter/flutter.git"
+
+outputs:
+  CHANNEL:
+    value: "${{ steps.flutter-action.outputs.CHANNEL }}"
+    description: The selected Flutter release channel
+  VERSION:
+    value: "${{ steps.flutter-action.outputs.VERSION }}"
+    description: The selected Flutter version
+  ARCHITECTURE:
+    value: "${{ steps.flutter-action.outputs.ARCHITECTURE }}"
+    description: The selected Flutter CPU architecture
+  CACHE-KEY:
+    value: "${{ steps.flutter-action.outputs.CACHE-KEY }}"
+    description: Key used to cache the Flutter SDK
+  CACHE-PATH:
+    value: "${{ steps.flutter-action.outputs.CACHE-PATH }}"
+    description: Path to Flutter SDK
+  PUB-CACHE-KEY:
+    value: "${{ steps.flutter-action.outputs.PUB-CACHE-KEY }}"
+    description: Key used to cache the pub dependencies
+  PUB-CACHE-PATH:
+    value: "${{ steps.flutter-action.outputs.PUB-CACHE-PATH }}"
+    description: Path to pub cache
+  GIT_SOURCE:
+    value: "${{ steps.flutter-action.outputs.GIT_SOURCE }}"
+    description: Git source of Flutter SDK repository to clone
+
+runs:
+  using: composite
+  steps:
+    # This is a cross-platform composite action that needs yq in order to parse
+    # the pubspec.yaml file.
+    # It's not preinstalled on Windows runners.
+    # See https://github.com/actions/runner-images/issues/7443#issuecomment-1514597691
+    - name: Make yq tool available on Windows runners
+      if: runner.os == 'Windows' && inputs.flutter-version-file != ''
+      run: choco install yq
+      shell: bash
+
+    - name: Make setup script executable
+      run: chmod +x "$GITHUB_ACTION_PATH/setup.sh"
+      shell: bash
+
+    - name: Set action inputs
+      id: flutter-action
+      shell: bash
+      run: |
+        $GITHUB_ACTION_PATH/setup.sh -p \
+          -n '${{ inputs.flutter-version }}' \
+          -f '${{ inputs.flutter-version-file }}' \
+          -a '${{ inputs.architecture }}' \
+          -k '${{ inputs.cache-key }}' \
+          -c '${{ inputs.cache-path }}' \
+          -l '${{ inputs.pub-cache-key }}' \
+          -d '${{ inputs.pub-cache-path }}' \
+          -g '${{ inputs.git-source }}' \
+          ${{ inputs.channel }}
+
+    - name: Cache Flutter
+      uses: actions/cache@v4
+      if: ${{ inputs.cache == 'true' }}
+      with:
+        path: ${{ steps.flutter-action.outputs.CACHE-PATH }}
+        key: ${{ steps.flutter-action.outputs.CACHE-KEY }}
+
+    - name: Cache pub dependencies
+      uses: actions/cache@v4
+      if: ${{ inputs.cache == 'true' }}
+      with:
+        path: ${{ steps.flutter-action.outputs.PUB-CACHE-PATH }}
+        key: ${{ steps.flutter-action.outputs.PUB-CACHE-KEY }}-${{ hashFiles('**/pubspec.lock') }}
+
+    - name: Run setup script
+      shell: bash
+      if: ${{ inputs.dry-run != 'true' && inputs.dry-run != true }}
+      run: |
+        $GITHUB_ACTION_PATH/setup.sh \
+          -n '${{ steps.flutter-action.outputs.VERSION }}' \
+          -a '${{ steps.flutter-action.outputs.ARCHITECTURE }}' \
+          -c '${{ steps.flutter-action.outputs.CACHE-PATH }}' \
+          -d '${{ steps.flutter-action.outputs.PUB-CACHE-PATH }}' \
+          ${{ steps.flutter-action.outputs.CHANNEL }}

action.yml

@@ -1,17 +0,0 @@
-name: 'Flutter action'
-description: 'Setup your runner with Flutter environment'
-author: 'Alif Rachmawadi'
-inputs:
-  flutter-version:
-    description: 'The Flutter version to make available on the path'
-    required: false
-  channel:
-    description: 'The Flutter build release channel'
-    required: false
-    default: 'stable'
-runs:
-  using: 'node12'
-  main: 'dist/index.js'
-branding:
-  icon: 'maximize'
-  color: 'blue'

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

@@ -1,51 +0,0 @@
-{
-  "name": "flutter-action",
-  "version": "1.2.0",
-  "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": "^1.2.3",
-    "@actions/exec": "^1.0.3",
-    "@actions/http-client": "^1.0.6",
-    "@actions/io": "^1.0.2",
-    "@actions/tool-cache": "^1.3.1",
-    "semver": "^7.1.3",
-    "uuid": "^7.0.1"
-  },
-  "devDependencies": {
-    "@types/jest": "^25.1.3",
-    "@types/nock": "^10.0.3",
-    "@types/node": "^12.12.29",
-    "@types/semver": "^7.1.0",
-    "@types/uuid": "^7.0.0",
-    "@zeit/ncc": "^0.21.1",
-    "jest": "^25.1.0",
-    "jest-circus": "^25.1.0",
-    "nock": "^10.0.6",
-    "npm-run-all": "^4.1.5",
-    "prettier": "^1.19.1",
-    "ts-jest": "^25.2.1",
-    "typescript": "^3.8.3"
-  }
-}

setup.sh

@@ -0,0 +1,239 @@
+#!/bin/bash
+set -eu
+
+check_command() {
+	command -v "$1" >/dev/null 2>&1
+}
+
+if ! check_command jq; then
+	echo "jq not found. Install it from https://stedolan.github.io/jq"
+	exit 1
+fi
+
+OS_NAME=$(echo "$RUNNER_OS" | awk '{print tolower($0)}')
+ARCH_NAME=$(echo "$RUNNER_ARCH" | awk '{print tolower($0)}')
+MANIFEST_BASE_URL="${FLUTTER_STORAGE_BASE_URL:-https://storage.googleapis.com}/flutter_infra_release/releases"
+MANIFEST_JSON_PATH="releases_$OS_NAME.json"
+MANIFEST_URL="$MANIFEST_BASE_URL/$MANIFEST_JSON_PATH"
+
+filter_by_channel() {
+	jq --arg channel "$1" '[.releases[] | select($channel == "any" or .channel == $channel)]'
+}
+
+filter_by_arch() {
+	jq --arg arch "$1" '[.[] | select(.dart_sdk_arch == $arch or ($arch == "x64" and (has("dart_sdk_arch") | not)))]'
+}
+
+filter_by_version() {
+	jq --arg version "$1" '.[].version |= gsub("^v"; "") | (if $version == "any" then .[0] else (map(select(.version == $version or (.version | startswith(($version | sub("\\.x$"; "")) + ".")) and .version != $version)) | .[0]) end)'
+}
+
+not_found_error() {
+	echo "Unable to determine Flutter version for channel: $1 version: $2 architecture: $3"
+}
+
+transform_path() {
+	if [ "$OS_NAME" = windows ]; then
+		echo "$1" | sed -e 's/^\///' -e 's/\//\\/g'
+	else
+		echo "$1"
+	fi
+}
+
+download_archive() {
+	archive_url="$MANIFEST_BASE_URL/$1"
+	archive_name=$(basename "$1")
+	archive_local="$RUNNER_TEMP/$archive_name"
+
+	curl --connect-timeout 15 --retry 5 "$archive_url" >"$archive_local"
+
+	mkdir -p "$2"
+
+	case "$archive_name" in
+	*.zip)
+		EXTRACT_PATH="$RUNNER_TEMP/_unzip_temp"
+		unzip -q -o "$archive_local" -d "$EXTRACT_PATH"
+		# 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 "$2"
+		mv "$EXTRACT_PATH"/flutter "$2"
+		rm -r "$EXTRACT_PATH"
+		;;
+	*)
+		tar xf "$archive_local" -C "$2" --strip-components=1
+		;;
+	esac
+
+	rm "$archive_local"
+}
+
+CACHE_PATH=""
+CACHE_KEY=""
+PUB_CACHE_PATH=""
+PUB_CACHE_KEY=""
+PRINT_ONLY=""
+TEST_MODE=false
+ARCH=""
+VERSION=""
+VERSION_FILE=""
+GIT_SOURCE=""
+
+while getopts 'tc:k:d:l:pa:n:f:g:' flag; do
+	case "$flag" in
+	c) CACHE_PATH="$OPTARG" ;;
+	k) CACHE_KEY="$OPTARG" ;;
+	d) PUB_CACHE_PATH="$OPTARG" ;;
+	l) PUB_CACHE_KEY="$OPTARG" ;;
+	p) PRINT_ONLY=true ;;
+	t) TEST_MODE=true ;;
+	a) ARCH="$(echo "$OPTARG" | awk '{print tolower($0)}')" ;;
+	n) VERSION="$OPTARG" ;;
+	f)
+		VERSION_FILE="$OPTARG"
+		if [ -n "$VERSION_FILE" ] && ! check_command yq; then
+			echo "yq not found. Install it from https://mikefarah.gitbook.io/yq"
+			exit 1
+		fi
+		;;
+    g) GIT_SOURCE="$OPTARG" ;;
+	?) exit 2 ;;
+	esac
+done
+
+[ -z "$ARCH" ] && ARCH="$ARCH_NAME"
+
+if [ -n "$VERSION_FILE" ]; then
+	if [ -n "$VERSION" ]; then
+		echo "Cannot specify both a version and a version file"
+		exit 1
+	fi
+
+	VERSION="$(yq eval '.environment.flutter' "$VERSION_FILE")"
+fi
+
+ARR_CHANNEL=("${@:$OPTIND:1}")
+CHANNEL="${ARR_CHANNEL[0]:-}"
+
+[ -z "$CHANNEL" ] && CHANNEL=stable
+[ -z "$VERSION" ] && VERSION=any
+[ -z "$ARCH" ] && ARCH=x64
+[ -z "$CACHE_PATH" ] && CACHE_PATH="$RUNNER_TOOL_CACHE/flutter/:channel:-:version:-:arch:"
+[ -z "$CACHE_KEY" ] && CACHE_KEY="flutter-:os:-:channel:-:version:-:arch:-:hash:"
+[ -z "$PUB_CACHE_KEY" ] && PUB_CACHE_KEY="flutter-pub-:os:-:channel:-:version:-:arch:-:hash:"
+[ -z "$PUB_CACHE_PATH" ] && PUB_CACHE_PATH="default"
+[ -z "$GIT_SOURCE" ] && GIT_SOURCE="https://github.com/flutter/flutter.git"
+
+# `PUB_CACHE` is what Dart and Flutter looks for in the environment, while
+# `PUB_CACHE_PATH` is passed in from the action.
+#
+# If `PUB_CACHE` is set already, then it should continue to be used. Otherwise, satisfy it
+# if the action requests a custom path, or set to the Dart default values depending
+# on the operating system.
+if [ -z "${PUB_CACHE:-}" ]; then
+	if [ "$PUB_CACHE_PATH" != "default" ]; then
+		PUB_CACHE="$PUB_CACHE_PATH"
+	elif [ "$OS_NAME" = "windows" ]; then
+		PUB_CACHE="$LOCALAPPDATA\\Pub\\Cache"
+	else
+		PUB_CACHE="$HOME/.pub-cache"
+	fi
+fi
+
+if [ "$TEST_MODE" = true ]; then
+	RELEASE_MANIFEST=$(cat "$(dirname -- "${BASH_SOURCE[0]}")/test/$MANIFEST_JSON_PATH")
+else
+	RELEASE_MANIFEST=$(curl --silent --connect-timeout 15 --retry 5 "$MANIFEST_URL")
+fi
+
+if [ "$CHANNEL" = "master" ] || [ "$CHANNEL" = "main" ]; then
+	VERSION_MANIFEST="{\"channel\":\"$CHANNEL\",\"version\":\"$VERSION\",\"dart_sdk_arch\":\"$ARCH\",\"hash\":\"$CHANNEL\",\"sha256\":\"$CHANNEL\"}"
+else
+	VERSION_MANIFEST=$(echo "$RELEASE_MANIFEST" | filter_by_channel "$CHANNEL" | filter_by_arch "$ARCH" | filter_by_version "$VERSION")
+fi
+
+case "$VERSION_MANIFEST" in
+*null*)
+	not_found_error "$CHANNEL" "$VERSION" "$ARCH"
+	exit 1
+	;;
+esac
+
+expand_key() {
+	version_channel=$(echo "$VERSION_MANIFEST" | jq -r '.channel')
+	version_version=$(echo "$VERSION_MANIFEST" | jq -r '.version')
+	version_arch=$(echo "$VERSION_MANIFEST" | jq -r '.dart_sdk_arch // "x64"')
+	version_hash=$(echo "$VERSION_MANIFEST" | jq -r '.hash')
+	version_sha_256=$(echo "$VERSION_MANIFEST" | jq -r '.sha256')
+
+	expanded_key="${1/:channel:/$version_channel}"
+	expanded_key="${expanded_key/:version:/$version_version}"
+	expanded_key="${expanded_key/:arch:/$version_arch}"
+	expanded_key="${expanded_key/:hash:/$version_hash}"
+	expanded_key="${expanded_key/:sha256:/$version_sha_256}"
+	expanded_key="${expanded_key/:os:/$OS_NAME}"
+
+	echo "$expanded_key"
+}
+
+CACHE_KEY=$(expand_key "$CACHE_KEY")
+PUB_CACHE_KEY=$(expand_key "$PUB_CACHE_KEY")
+CACHE_PATH=$(expand_key "$(transform_path "$CACHE_PATH")")
+
+if [ "$PRINT_ONLY" = true ]; then
+	version_info=$(echo "$VERSION_MANIFEST" | jq -j '.channel,":",.version,":",.dart_sdk_arch // "x64"')
+
+	info_channel=$(echo "$version_info" | awk -F ':' '{print $1}')
+	info_version=$(echo "$version_info" | awk -F ':' '{print $2}')
+	info_architecture=$(echo "$version_info" | awk -F ':' '{print $3}')
+
+	if [ "$TEST_MODE" = true ]; then
+		echo "CHANNEL=$info_channel"
+		echo "VERSION=$info_version"
+		# VERSION_FILE is not printed, because it is essentially same as VERSION
+		echo "ARCHITECTURE=$info_architecture"
+		echo "CACHE-KEY=$CACHE_KEY"
+		echo "CACHE-PATH=$CACHE_PATH"
+		echo "PUB-CACHE-KEY=$PUB_CACHE_KEY"
+		echo "PUB-CACHE-PATH=$PUB_CACHE"
+		exit 0
+	fi
+
+	{
+		echo "CHANNEL=$info_channel"
+		echo "VERSION=$info_version"
+		# VERSION_FILE is not printed, because it is essentially same as VERSION
+		echo "ARCHITECTURE=$info_architecture"
+		echo "CACHE-KEY=$CACHE_KEY"
+		echo "CACHE-PATH=$CACHE_PATH"
+		echo "PUB-CACHE-KEY=$PUB_CACHE_KEY"
+		echo "PUB-CACHE-PATH=$PUB_CACHE"
+	} >>"${GITHUB_OUTPUT:-/dev/null}"
+
+	exit 0
+fi
+
+if [ ! -x "$CACHE_PATH/bin/flutter" ]; then
+	if [ "$CHANNEL" = "master" ] || [ "$CHANNEL" = "main" ]; then
+		git clone -b "$CHANNEL" "$GIT_SOURCE" "$CACHE_PATH"
+		if [ "$VERSION" != "any" ]; then
+			git config --global --add safe.directory "$CACHE_PATH"
+			(cd "$CACHE_PATH" && git checkout "$VERSION")
+		fi
+	else
+		archive_url=$(echo "$VERSION_MANIFEST" | jq -r '.archive')
+		download_archive "$archive_url" "$CACHE_PATH"
+	fi
+fi
+
+{
+	echo "FLUTTER_ROOT=$CACHE_PATH"
+	echo "PUB_CACHE=$PUB_CACHE"
+} >>"${GITHUB_ENV:-/dev/null}"
+
+{
+	echo "$CACHE_PATH/bin"
+	echo "$CACHE_PATH/bin/cache/dart-sdk/bin"
+	echo "$PUB_CACHE/bin"
+} >>"${GITHUB_PATH:-/dev/null}"

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

@@ -1,211 +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('.');
-
-  if (versionPart[1] == null || versionPart[2] == null) {
-    version = version.concat('.x');
-  }
-
-  version = await determineVersion(version, channel);
-
-  let cleanver = `${version.replace('+', '-')}-${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 downloadInfo = getDownloadInfo(version, channel);
-    const sdkFile = await tc.downloadTool(downloadInfo.url);
-
-    let tempDir: string = generateTempDir();
-    const sdkDir = await extractDownload(sdkFile, tempDir);
-    core.debug(`Flutter sdk extracted to ${sdkDir}`);
-
-    toolPath = await tc.cacheDir(sdkDir, 'flutter', cleanver);
-  }
-
-  core.exportVariable('FLUTTER_HOME', toolPath);
-  core.addPath(path.join(toolPath, 'bin'));
-}
-
-function osName(): string {
-  if (IS_DARWIN) return 'macos';
-  if (IS_WINDOWS) return 'windows';
-
-  return process.platform;
-}
-
-function extName(): string {
-  if (IS_LINUX) return 'tar.xz';
-
-  return 'zip';
-}
-
-function getDownloadInfo(
-  version: string,
-  channel: string
-): {version: string; url: string} {
-  const os = osName();
-  const ext = extName();
-  const url = `${storageUrl}/${channel}/${os}/flutter_${os}_v${version}-${channel}.${ext}`;
-
-  return {
-    version,
-    url
-  };
-}
-
-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 ${file} - it is a directory`);
-  }
-
-  if ('tar.xz' === extName()) {
-    await tc.extractTar(file, destDir, 'x');
-  } else {
-    await tc.extractZip(file, destDir);
-  }
-}
-
-async function determineVersion(
-  version: string,
-  channel: string
-): Promise<string> {
-  if (version.endsWith('.x') || version === '') {
-    return await getLatestVersion(version, channel);
-  }
-
-  return version;
-}
-
-interface IFlutterChannel {
-  [key: string]: string;
-  beta: string;
-  dev: string;
-  stable: string;
-}
-
-interface IFlutterRelease {
-  hash: string;
-  channel: string;
-  version: string;
-}
-
-interface IFlutterStorage {
-  current_release: IFlutterChannel;
-  releases: IFlutterRelease[];
-}
-
-async function getLatestVersion(
-  version: string,
-  channel: string
-): Promise<string> {
-  const releasesUrl: string = `${storageUrl}/releases_${osName()}.json`;
-  const http: httpm.HttpClient = new httpm.HttpClient('flutter-action');
-  const storage: IFlutterStorage | null = (
-    await http.getJson<IFlutterStorage | null>(releasesUrl)
-  ).result;
-
-  if (!storage) {
-    throw new Error('unable to get latest version');
-  }
-
-  if (version.endsWith('.x')) {
-    const sver = version.slice(0, version.length - 2);
-    const releases = storage.releases.filter(
-      release =>
-        release.version.startsWith(`v${sver}`) && release.channel === channel
-    );
-    const versions = releases.map(release =>
-      release.version.slice(1, release.version.length)
-    );
-    const sortedVersions = versions.sort(semver.rcompare);
-
-    core.debug(
-      `latest version of ${version} from channel ${channel} is ${sortedVersions[0]}`
-    );
-
-    return sortedVersions[0];
-  }
-
-  const channelVersion = storage.releases.find(
-    release => release.hash === storage.current_release[channel]
-  );
-
-  if (!channelVersion) {
-    throw new Error(`unable to get latest version from channel ${channel}`);
-  }
-
-  let cver = channelVersion.version;
-  cver = cver.slice(1, cver.length);
-
-  core.debug(`latest version from channel ${channel} is ${cver}`);
-  return cver;
-}

test/pubspec.yaml

@@ -0,0 +1,5 @@
+name: flutter_action_test
+
+environment:
+  dart: ">=2.18.0 <3.0.0"
+  flutter: 3.3.10

tsconfig.json

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