Add coverage recording

.travis.yml

@@ -20,6 +20,13 @@ addons:
       - libgl1-mesa-dev
       - llvm-3.8-dev
       - libedit-dev
+      - libcurl4-openssl-dev
+      - libelf-dev
+      - libdw-dev
+      - libiberty-dev
+      - cmake
+      - gcc
+      - binutils-dev
 env:
   - BUILD_KIND=DEBUG RUST_BACKTRACE=1
   - BUILD_KIND=RELEASE RUST_BACKTRACE=1
@@ -30,6 +37,15 @@ script:
   - if [ $BUILD_KIND = DEBUG ]; then (cd webrender_api && cargo test --verbose --features "ipc"); fi
   - if [ $BUILD_KIND = DEBUG ]; then (cd webrender && cargo build --verbose --no-default-features); fi
   - if [ $BUILD_KIND = DEBUG ]; then (cargo test --all --verbose); fi
-  - if [ $BUILD_KIND = RELEASE ]; then (cd wrench && python headless.py reftest); fi
+  - if [ $BUILD_KIND = RELEASE ]; then (cargo test --all --verbose); fi
+  - if [ $BUILD_KIND = DEBUG ]; then (wget https://github.com/SimonKagstrom/kcov/archive/master.tar.gz &&
+                                        tar xzf master.tar.gz &&
+                                        cd kcov-master &&
+                                        mkdir build &&
+                                        cd build &&
+                                        cmake .. &&
+                                        make &&
+                                        sudo make install); fi
+  - if [ $BUILD_KIND = DEBUG ]; then (cd wrench && mkdir cov && python headless.py --subpixel-aa reftest); fi
   - if [ $BUILD_KIND = RELEASE ]; then (cd wrench && cargo build --release --features=debugger); fi
   - if [ $TRAVIS_RUST_VERSION == "nightly" ]; then (cd webrender && cargo bench --verbose); fi

wrench/headless.py

@@ -67,4 +67,8 @@ def set_osmesa_env(bin_path):
 
 subprocess.check_call(['cargo', 'build', '--release', '--verbose', '--features', 'headless'])
 set_osmesa_env('../target/release/')
-subprocess.check_call(['../target/release/wrench', '-h'] + sys.argv[1:])
+subprocess.check_call(['kcov', '--verify', 'cov/out',
+                               '--include-path', '../webrender',
+                               '--coveralls-id', os.environ['TRAVIS_JOB_ID'],
+                               '../target/release/wrench', '-h']
+                               + sys.argv[1:])