Add Codecov badge and upload LCOV coverage

Author: 1998code

.github/workflows/swift.yml

@@ -26,9 +26,21 @@ jobs:
         run: swift build -v
       - name: Test with coverage
         run: swift test --enable-code-coverage -v
-      - name: Coverage path
+      - name: Export LCOV
         id: coverage
-        run: echo "path=$(swift test --show-codecov-path)" >> "$GITHUB_OUTPUT"
+        run: |
+          COVERAGE_PATH="$(swift test --show-codecov-path)"
+          CODECOV_DIR="$(dirname "$COVERAGE_PATH")"
+          BIN_PATH="$(swift build --show-bin-path)"
+          TEST_BINARY="$BIN_PATH/SwiftNEWPackageTests.xctest/Contents/MacOS/SwiftNEWPackageTests"
+
+          xcrun llvm-cov export "$TEST_BINARY" \
+            -instr-profile "$CODECOV_DIR/default.profdata" \
+            -format=lcov \
+            -ignore-filename-regex='/.build/|/Tests/' \
+            | sed "s#SF:$PWD/#SF:#" > coverage.lcov
+
+          echo "path=coverage.lcov" >> "$GITHUB_OUTPUT"
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v6
         with:

README.md

@@ -5,6 +5,7 @@
 ![Stable](https://img.shields.io/github/v/release/1998code/SwiftNEWKit?color=03A791&label=Stable)
 ![Beta](https://img.shields.io/github/v/release/1998code/SwiftNEWKit?include_prereleases&color=3A59D1&label=Beta)
 [![Validate JSON Files](https://github.com/1998code/SwiftNEWKit/actions/workflows/validate-json.yml/badge.svg)](https://github.com/1998code/SwiftNEWKit/actions/workflows/validate-json.yml)
+[![codecov](https://codecov.io/github/1998code/SwiftNEWKit/branch/main/graph/badge.svg?token=GI0KRUHVH1)](https://codecov.io/github/1998code/SwiftNEWKit)
 ![Swift Version](https://img.shields.io/badge/Swift-5.9/6.1-teal.svg)
 ![Platforms](https://img.shields.io/badge/Platforms-iOS%2015.0+%20|%20macOS%2014.0+%20|%20tvOS%2017.0+%20|%20visionOS%201.0+-15437D.svg)
 ![License](https://img.shields.io/badge/License-MIT-C8ECFE.svg)