Add Path.source()

.github/workflows/ci.yml

@@ -14,10 +14,9 @@ jobs:
     strategy:
       matrix:
         xcode:
-        #- 10.3   # Swift 5.0 (doesn’t work on GHA macOS image :-/)
+      # - 10.3   # Swift 5.0 (doesn’t work on GHA macOS image :-/)
         - 11.3   # Swift 5.1
         - ^11.4  # Swift 5.2
-        - latest # Swift 5.3
     steps:
     - uses: actions/checkout@v2
     - name: setup-xcode
@@ -34,9 +33,13 @@ jobs:
         destination:
         - platform=iOS Simulator,OS=latest,name=iPhone 11
         - platform=tvOS Simulator,OS=latest,name=Apple TV
-        - platform=macOS # for code-coverage
+        - platform=macOS
     steps:
     - uses: actions/checkout@v2
+    - uses: maxim-lobanov/setup-xcode@1.0
+      with:
+        xcode-version: 12  # Swift 5.3
+    - run: swift --version
     - run: swift package generate-xcodeproj --enable-code-coverage
     - uses: sersoft-gmbh/xcodebuild-action@v1
       with:
@@ -50,36 +53,39 @@ jobs:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v2
-    - run: swift package generate-xcodeproj --enable-code-coverage
+    - run: swift package generate-xcodeproj
     - uses: sersoft-gmbh/xcodebuild-action@v1
       with:
         project: Path.swift.xcodeproj
         scheme: Path.swift-Package
         destination: platform=watchOS Simulator,OS=latest,name=Apple Watch Series 5 - 40mm
         action: build
+  linux-4-2:
+    needs: smoke
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: fwal/setup-swift@v1
+      with:
+        swift-version: 4.2
+    - run: swift test --parallel  # doesn’t support code coverage
   linux:
     needs: smoke
     runs-on: ubuntu-latest
     strategy:
       matrix:
         swift:
-        # - 4.0.3 fails for some reason
-        - 4.2
         - 5.0.3
         - 5.1
         - 5.2
-        # - 5.3 not available yet sigh
+      # - 5.3 not yet available sigh
     steps:
     - uses: actions/checkout@v2
     - uses: fwal/setup-swift@v1
       with:
         swift-version: ${{ matrix.swift }}
     - run: swift test --parallel --enable-code-coverage
-      if: ${{ matrix.swift != '4.2' }}
-    - run: swift test --parallel
-      if: ${{ matrix.swift == '4.2' }}
     - name: Generate Coverage Report
-      if: ${{ matrix.swift != '4.2' }}
       run: |
         sudo apt-get -qq update && sudo apt-get -qq install llvm-10
         export b=$(swift build --show-bin-path) && llvm-cov-10 \
@@ -89,6 +95,5 @@ jobs:
           $b/Path.swiftPackageTests.xctest \
           > info.lcov
     - uses: codecov/codecov-action@v1
-      if: ${{ matrix.swift != '4.2' }}
       with:
-        file: ./info.lcov
+        file: ./info.lcov