Remove tar actions/cache in setup-flutter in favor of instant persistent disk SDK reuse

setup-flutter/README.md

@@ -1,42 +1,31 @@
 # Setup Flutter
 
-Cross-platform composite action to set up the Flutter SDK with automated caching on macOS, Windows, and Linux. Supports local Git mirrors with automatic fallback to upstream GitHub.
+Cross-platform composite action to set up the Flutter SDK with concurrency locking and local Git mirror support on macOS, Windows, and Linux.
 
 ## Features
 
 - **Multi-OS Support**: Native setup for macOS (Apple Silicon & Intel), Windows (PowerShell), and Linux.
 - **Git Mirror & Fallback**: Clones from local Gitea Flutter mirror (`https://git.rodydavis.dev/rodydavis/flutter.git`) with automatic fallback to `https://github.com/flutter/flutter.git`.
-- **SDK Caching**: Uses `actions/cache@v3` to cache the full Flutter SDK directory across workflow runs based on OS, CPU architecture, and version.
+- **Fast Local Disk Caching & Concurrency Locks**: Reuses persistent runner SDK installations on disk without expensive tar compression steps or race conditions between parallel jobs.
 - **Desktop Windowing**: Automatically configures desktop windowing support and exports Flutter to `$GITHUB_PATH`.
 
 ## Inputs
 
 | Name | Description | Required | Default |
 | :--- | :--- | :--- | :--- |
-| `version` | Flutter channel, tag, or branch (e.g., `master`, `stable`, `3.29.0`). | No | `master` |
+| `version` | Flutter channel, tag, or commit hash (e.g., `master`, `stable`, `3.29.0`, `4ebf37fe...`). | No | `master` |
 | `mirror_url` | Git repository URL for Flutter SDK mirror. | No | `https://git.rodydavis.dev/rodydavis/flutter.git` |
 | `git_token` | Gitea token for authenticated git mirror access. | No | `''` |
-| `cache` | Enable Flutter SDK caching across CI runs. | No | `true` |
 | `enable_windowing` | Enable desktop windowing and platform configs. | No | `true` |
 
 ## Example Usage
 
-### Basic Usage (Master Channel)
+### Pinned Commit Hash
 
 ```yaml
 - name: Set up Flutter
   uses: rodydavis/shared-actions/setup-flutter@main
   with:
-    version: master
+    version: 4ebf37fe7df0a130ba5bee17315b98f905c10b34
     git_token: ${{ secrets.GIT_TOKEN }}
 ```
-
-### Specific Version Tag with Caching
-
-```yaml
-- name: Set up Flutter 3.29.0
-  uses: rodydavis/shared-actions/setup-flutter@main
-  with:
-    version: '3.29.0'
-    cache: 'true'
-```

setup-flutter/action.yml

@@ -1,5 +1,5 @@
 name: 'Setup Flutter'
-description: 'Cross-platform setup for Flutter with caching on macOS, Windows, and Linux.'
+description: 'Cross-platform setup for Flutter with local mirror and multi-runner concurrency support.'
 inputs:
   version:
     description: 'Flutter channel, version tag, or commit hash (e.g., master, stable, 3.29.0, 4ebf37fe7df0a130ba5bee17315b98f905c10b34)'
@@ -13,10 +13,6 @@ inputs:
     description: 'Gitea token for authenticated git cloning'
     required: false
     default: ''
-  cache:
-    description: 'Enable Flutter SDK caching'
-    required: false
-    default: 'true'
   enable_windowing:
     description: 'Enable windowing and desktop support'
     required: false
@@ -25,24 +21,8 @@ inputs:
 runs:
   using: 'composite'
   steps:
-    - name: Determine Cache Key
-      id: cache-key
-      shell: bash
-      run: |
-        echo "key=flutter-${{ runner.os }}-${{ runner.arch }}-${{ inputs.version }}" >> $GITHUB_OUTPUT
-
-    - name: Cache Flutter SDK
-      if: inputs.cache == 'true'
-      id: flutter-cache
-      uses: actions/cache@v3
-      with:
-        path: |
-          ~/flutter-sdk
-          C:\flutter-sdk
-        key: ${{ steps.cache-key.outputs.key }}
-
     - name: Install Flutter (macOS / Linux)
-      if: runner.os != 'Windows' && steps.flutter-cache.outputs.cache-hit != 'true'
+      if: runner.os != 'Windows'
       shell: bash
       run: |
         LOCK_DIR="${TMPDIR:-/tmp}/flutter-sdk-setup.lock"
@@ -82,7 +62,7 @@ runs:
         rm -rf "$LOCK_DIR" || true
 
     - name: Install Flutter (Windows)
-      if: runner.os == 'Windows' && steps.flutter-cache.outputs.cache-hit != 'true'
+      if: runner.os == 'Windows'
       shell: powershell
       run: |
         $lockDir = Join-Path $env:TEMP "flutter-sdk-setup.lock"