initial work on llvm cov support

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cargo-make"
-version = "0.3.35"
+version = "0.3.36"
 authors = ["Sagie Gur-Ari <sagiegurari@gmail.com>"]
 description = "Rust task runner and build tool."
 license = "Apache-2.0"

README.md

@@ -834,7 +834,7 @@ See [contributing guide](.github/CONTRIBUTING.md)
 
 | Date | Version | Description |
 | ----------- | ------- | ----------- |
-| 2017-07-21 | v0.3.35 | Maintenance |
+| 2017-07-22 | v0.3.36 | Added coverage-lcov task (not fully tested) |
 | 2017-07-21 | v0.3.34 | Added coverage-tarpaulin task |
 | 2017-07-21 | v0.3.33 | Added more environment variables for workspace support |
 | 2017-07-20 | v0.3.32 | Added --list-all-steps cli option |

docs/_includes/content.md

@@ -802,7 +802,7 @@ See [contributing guide](https://github.com/sagiegurari/cargo-make/blob/master/.
 
 | Date | Version | Description |
 | ----------- | ------- | ----------- |
-| 2017-07-21 | v0.3.35 | Maintenance |
+| 2017-07-22 | v0.3.36 | Added coverage-lcov task (not fully tested) |
 | 2017-07-21 | v0.3.34 | Added coverage-tarpaulin task |
 | 2017-07-21 | v0.3.33 | Added more environment variables for workspace support |
 | 2017-07-20 | v0.3.32 | Added --list-all-steps cli option |

src/default.toml

@@ -376,14 +376,15 @@ done
 ]
 
 [tasks.coverage-lcov]
-description = "WARNING, ONLY INSTALLS LCOV. ACTUAL COVERAGE IS CURRENTLY NOT IMPLEMENTED!!!"
-windows_alias = "empty"
+description = "WARNING, THIS TASK IS UNTESTED!!!! Installs (if missing) and runs coverage using llvm-cov (not supported on windows/mac)"
+
+[tasks.coverage-lcov.linux]
 install_script = [
 '''
 command -v lcov >/dev/null 2>&1 || {
  if [ "$(grep -Ei 'debian|buntu|mint' /etc/*release)" ]; then
  sudo apt-get update || true
- sudo apt-get install -y clang
+ sudo apt-get install -y clang llvm-3.9 lcov
  
  git clone https://github.com/linux-test-project/lcov.git
  cd lcov
@@ -396,8 +397,39 @@ command -v lcov >/dev/null 2>&1 || {
 ]
 script = [
 '''
-echo "Not Implemented."
-exit 1
+#based on https://users.rust-lang.org/t/howto-generating-a-branch-coverage-report/8524
+if [ -n "$LLVM_VERSION" ]; then
+ rm -f *.gcda *.gcno
+
+ cargo rustc -- --test -Ccodegen-units=1 -Clink-dead-code -Cpasses=insert-gcov-profiling -Zno-landing-pads "-L/usr/lib/llvm-$LLVM_VERSION/lib/clang/$LLVM_VERSION/lib/linux/" "-lclang_rt.profile-${CARGO_MAKE_RUST_TARGET_ARCH}"
+
+ ls *.gcno
+
+ echo "Running unit tests"
+ for file in target/debug/deps/${CARGO_MAKE_CRATE_FS_NAME}*
+ do
+ "$file" || true
+ done
+
+ echo "Running integration tests"
+ for file in target/debug/deps/test_*
+ do
+ "$file" || true
+ done
+
+ ls *.gcda
+
+ echo "#!/bin/sh -e\nllvm-cov gcov $*" >> ./target/llvm-gcov
+ chmod 777 ./target/llvm-gcov
+ PATH=$PATH:./target:"/usr/lib/llvm-$LLVM_VERSION/bin"
+
+ LCOVOPTS="--gcov-tool llvm-gcov --rc lcov_branch_coverage=1"
+ LCOVOPTS="${LCOVOPTS} --rc lcov_excl_line=assert"
+ lcov ${LCOVOPTS} --capture --directory . --base-directory . -o coverage.lcov
+ lcov ${LCOVOPTS} --extract coverage.info "$(pwd)/*" -o "${CARGO_MAKE_CRATE_FS_NAME}.lcov"
+
+ genhtml --branch-coverage --demangle-cpp --legend "${CARGO_MAKE_CRATE_FS_NAME}.info" -o target/coverage/
+fi
 '''
 ]