🚀 Optimize ImageMagick caching in setup-cmux action

.github/actions/setup-cmux/action.yml

@@ -29,14 +29,23 @@ runs:
         restore-keys: |
           ${{ runner.os }}-bun-cache-
 
-    - name: Cache Homebrew (macOS)
+    - name: Cache ImageMagick (macOS)
       if: runner.os == 'macOS'
+      id: cache-imagemagick-mac
       uses: actions/cache@v4
       with:
-        path: ~/Library/Caches/Homebrew
-        key: ${{ runner.os }}-brew-cache-${{ hashFiles('**/bun.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-brew-cache-
+        path: |
+          /opt/homebrew/Cellar/imagemagick
+          /usr/local/Cellar/imagemagick
+        key: ${{ runner.os }}-${{ runner.arch }}-imagemagick-7.1.1
+
+    - name: Cache apt packages (Linux)
+      if: runner.os == 'Linux'
+      id: cache-apt
+      uses: actions/cache@v4
+      with:
+        path: /var/cache/apt/archives
+        key: ${{ runner.os }}-apt-imagemagick-v1
 
     - name: Install dependencies
       shell: bash
@@ -46,25 +55,38 @@ runs:
       if: runner.os == 'macOS'
       shell: bash
       run: |
-        if ! brew list imagemagick &>/dev/null; then
-          echo "📦 Installing ImageMagick..."
-          time brew install imagemagick
+        if [ "${{ steps.cache-imagemagick-mac.outputs.cache-hit }}" == "true" ]; then
+          echo "✅ ImageMagick restored from cache"
+          # Link the cached installation
+          brew link --overwrite --force imagemagick 2>/dev/null || true
+          if command -v magick &>/dev/null; then
+            magick --version | head -1
+          else
+            echo "⚠️  Cache restored but linking failed, reinstalling..."
+            HOMEBREW_NO_AUTO_UPDATE=1 brew install imagemagick
+            magick --version | head -1
+          fi
         else
-          echo "✅ ImageMagick already installed"
-          brew list imagemagick --versions
+          echo "📦 Installing ImageMagick..."
+          HOMEBREW_NO_AUTO_UPDATE=1 brew install imagemagick
+          magick --version | head -1
         fi
-        # Verify it's in PATH
-        which magick
-        magick --version | head -1
 
     - name: Install ImageMagick (Linux)
       if: runner.os == 'Linux'
       shell: bash
       run: |
-        if ! command -v convert &> /dev/null; then
-          echo "Installing ImageMagick..."
-          sudo apt-get update -qq
-          sudo apt-get install -y imagemagick
+        if command -v convert &>/dev/null; then
+          echo "✅ ImageMagick already installed"
+          convert --version | head -1
         else
-          echo "ImageMagick already installed"
+          echo "📦 Installing ImageMagick..."
+          # Restore apt cache permissions if cache was restored
+          if [ "${{ steps.cache-apt.outputs.cache-hit }}" == "true" ]; then
+            sudo chmod -R 755 /var/cache/apt/archives 2>/dev/null || true
+          fi
+          # Update only if needed and install with minimal dependencies
+          sudo apt-get update -qq
+          sudo apt-get install -y --no-install-recommends imagemagick
+          convert --version | head -1
         fi