chore: Code coverage ignores .build and test files

Author: NeedleInAJayStack

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
         run: docker run --rm -v ${{ github.workspace }}:/repo ghcr.io/nicklockwood/swiftformat:latest /repo --lint
 
   macos:
-    name: Build and test on macOS
+    name: Test on macOS
     runs-on: macOS-latest
     steps:
     - uses: maxim-lobanov/setup-xcode@v1
@@ -34,28 +34,33 @@ jobs:
     - name: Build and test
       run: swift test --parallel --enable-test-discovery
 
-  # Swift versions older than 5.7 don't have builds for ubuntu 22.04. https://www.swift.org/download/ 
-  ubuntu-20_04:
-    name: Build ${{ matrix.swift }} on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-20.04] 
-        swift: ["5.4", "5.5", "5.6"]
+  linux:
+    name: Test on Linux
+    runs-on: ubuntu-latest
     steps:
     - uses: swift-actions/setup-swift@v1
-      with:
-        swift-version: ${{ matrix.swift }}
     - uses: actions/checkout@v3
     - name: Test
-      run: swift test --parallel
+      run: swift test --parallel --enable-code-coverage
+    - name: Get test coverage html
+      run: |
+        llvm-cov show \
+          $(swift build --show-bin-path)/GraphitiPackageTests.xctest \
+          --instr-profile $(swift build --show-bin-path)/codecov/default.profdata \
+          --ignore-filename-regex="\.build|Tests" \
+          --format html \
+          --output-dir=.test-coverage
+    - name: Upload test coverage html
+      uses: actions/upload-artifact@v3
+      with:
+        name: test-coverage-report
+        path: .test-coverage
 
-  ubuntu-22_04:
-    name: Build ${{ matrix.swift }} on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
+  backcompat-ubuntu-22_04:
+    name: Test Swift ${{ matrix.swift }} on Ubuntu 22.04
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
-        os: [ubuntu-22.04] 
         swift: ["5.7"]
     steps:
     - uses: swift-actions/setup-swift@v1
@@ -65,23 +70,17 @@ jobs:
     - name: Test
       run: swift test --parallel
 
-  ubuntu-latest:
-    name: Build latest on ubuntu
-    runs-on: ubuntu-latest
+  # Swift versions older than 5.7 don't have builds for ubuntu 22.04. https://www.swift.org/download/ 
+  backcompat-ubuntu-20_04:
+    name: Test Swift ${{ matrix.swift }} on Ubuntu 20.04
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        swift: ["5.4", "5.5", "5.6"]
     steps:
     - uses: swift-actions/setup-swift@v1
+      with:
+        swift-version: ${{ matrix.swift }}
     - uses: actions/checkout@v3
     - name: Test
-      run: swift test --parallel --enable-code-coverage
-    - name: Get test coverage html
-      run: |
-        llvm-cov show \
-          $(swift build --show-bin-path)/GraphitiPackageTests.xctest \
-          --instr-profile $(swift build --show-bin-path)/codecov/default.profdata \
-          --format html \
-          --output-dir=.test-coverage
-    - name: Upload test coverage html
-      uses: actions/upload-artifact@v3
-      with:
-        name: test-coverage-report
-        path: .test-coverage
+      run: swift test --parallel