ci: run swift package tests only when package related files changed

Author: soumyamahunt

.github/workflows/main.yml

@@ -52,23 +52,42 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
 
+    - name: Check change in source files
+      id: changed_source
+      uses: tj-actions/[email protected]
+      with:
+        files: |
+          Sources/**/*
+          Tests/**/*
+          Package*.swift
+          .github/actions/setup/action.yml
+          .github/workflows/main.yml
+
     - name: Setup repository
+      if:  steps.changed_source.outputs.any_changed == 'true'
       uses: ./.github/actions/setup
       with:
         swift: ${{ matrix.swift }}
 
     - name: Run tests
+      if:  steps.changed_source.outputs.any_changed == 'true'
       run: npm run test
 
     - name: Swift Coverage Report
-      if: matrix.swift == '5.6' && github.event_name == 'push'
+      if: |
+        steps.changed_source.outputs.any_changed == 'true' &&
+        matrix.swift == '5.6' &&
+        github.event_name == 'push'
       uses: maxep/[email protected]
       with:
         file-format: lcov
         output-file: ./coverage.lcov
 
     - name: Codecov upload
-      if: matrix.swift == '5.6' && github.event_name == 'push'
+      if: |
+        steps.changed_source.outputs.any_changed == 'true' &&
+        matrix.swift == '5.6' &&
+        github.event_name == 'push'
       uses: codecov/[email protected]
       with:
         token: ${{ secrets.CODECOV_TOKEN }}