Build C dependencies before C++ to fix linking on Rust nightly

See discussion in https://github.com/rust-lang/rust/issues/95561

.github/workflows/coverage.yml

@@ -1,22 +1,20 @@
-# name: Coverage
+name: Coverage
 
-# on: [pull_request, push]
+on: [pull_request, push]
 
-# jobs:
-#   coverage:
-#     runs-on: ubuntu-latest
-#     steps:
-#       - uses: actions/checkout@v2
-#       - name: Install Rust
-#         run: rustup toolchain install nightly --component llvm-tools-preview
-
-#       - name: Install cargo-llvm-cov
-#         uses: taiki-e/install-action@cargo-llvm-cov
-
-#       - name: Generate code coverage
-#         run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
-#       - name: Upload coverage to Codecov
-#         uses: codecov/codecov-action@v1
-#         with:
-#           files: lcov.info
-#           fail_ci_if_error: true
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Rust
+        run: rustup toolchain install nightly --component llvm-tools-preview
+      - name: Install cargo-llvm-cov
+        run: curl -LsSf https://github.com/taiki-e/cargo-llvm-cov/releases/latest/download/cargo-llvm-cov-x86_64-unknown-linux-gnu.tar.gz | tar xzf - -C ~/.cargo/bin
+      - name: Generate code coverage
+        run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1
+        with:
+          files: lcov.info
+          fail_ci_if_error: true

build.rs

@@ -22,6 +22,13 @@ impl TreeSitterParser {
             }
         }
 
+        let mut build = cc::Build::new();
+        build.include(&dir).warnings(false); // ignore unused parameter warnings
+        for file in c_files {
+            build.file(dir.join(file));
+        }
+        build.compile(self.name);
+
         if !cpp_files.is_empty() {
             let mut cpp_build = cc::Build::new();
             cpp_build
@@ -43,12 +50,6 @@ impl TreeSitterParser {
             cpp_build.compile(&format!("{}-cpp", self.name));
         }
 
-        let mut build = cc::Build::new();
-        build.include(&dir).warnings(false); // ignore unused parameter warnings
-        for file in c_files {
-            build.file(dir.join(file));
-        }
-        build.compile(self.name);
     }
 }