feat: add spm cache

Author: okwasniewski

.github/actions/cache-spm/action.yml

@@ -0,0 +1,23 @@
+name: 'Cache SPM Dependencies'
+description: 'Cache Swift Package Manager (SPM) dependencies to speed up builds'
+
+runs:
+  using: "composite"
+  steps:
+    - name: Cache SPM dependencies
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.package-cache
+          .build
+        key: ${{ runner.os }}-spm-${{ hashFiles('**/Package.resolved') }}
+        restore-keys: |
+          ${{ runner.os }}-spm-
+
+    - name: List cached directories
+      if: steps.spm-cache.outputs.cache-hit == 'true'
+      shell: bash
+      run: |
+        echo "Cache hit! Listing cached directories:"
+        ls -lR ~/.package-cache
+        ls -lR .build

.github/workflows/ci.yml

@@ -28,6 +28,9 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@v2
 
+      - name: Cache SPM dependencies
+        uses: ./.github/actions/cache-spm
+
       - name: Set up Xcode
         uses: maxim-lobanov/setup-xcode@v1
         with:
@@ -42,6 +45,9 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@v2
 
+      - name: Cache SPM dependencies
+        uses: ./.github/actions/cache-spm
+
       - name: Set up Xcode
         uses: maxim-lobanov/setup-xcode@v1
         with: