ci: add coverage support

.travis.yml

@@ -3,6 +3,7 @@ language: rust
 cache:
   directories:
   - $HOME/.cache/rocksdb
+  - $HOME/.cache/kcov
 
 matrix:
   include:
@@ -13,28 +14,15 @@ matrix:
       addons:
          apt:
             sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-precise-3.6']
-            packages: ['clang-3.6', 'zlib1g-dev', 'libbz2-dev', 'libsnappy-dev', 'libjemalloc-dev', 'curl']
+            packages: ['clang-3.6', 'zlib1g-dev', 'libbz2-dev', 'libsnappy-dev', 'libjemalloc-dev', 'curl', 'libdw-dev', 'libelf-dev', 'elfutils', 'binutils-dev']
     - os: osx
       rust: nightly
 
 install:
-  - if [[ "${TRAVIS_OS_NAME}" == 'osx' ]]; then brew install gflags snappy rocksdb; fi
-  - rocksdb_dir=$HOME/.cache/rocksdb
-  - if [[ "${TRAVIS_OS_NAME}" == "linux" ]] && [[ ! -f "$rocksdb_dir/librocksdb.so" ]]; then need_rebuild=true; fi
-  - if [[ "$need_rebuild" == "true" ]] && [[ ! -d "$rocksdb_dir" ]]; then mkdir -p $rocksdb_dir; fi
-  # Build gflags
-  - pushd /tmp
-  - if [[ "$need_rebuild" == "true" ]]; then curl -L https://github.com/gflags/gflags/archive/v2.1.2.tar.gz -o gflags.tar.gz && tar xf gflags.tar.gz && cd gflags-2.1.2 && cmake . && make; fi
-  # Add gflags to include/library paths
-  - export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/tmp/gflags-2.1.2/lib"
-  - export LIBRARY_PATH="$LIBRARY_PATH:/tmp/gflags-2.1.2/lib"
-  - export CPLUS_INCLUDE_PATH="$CPLUS_INCLUDE_PATH:/tmp/gflags-2.1.2/include"
-  - if [ -n "${COMPILER}" ]; then export CXX=${COMPILER}; fi
-  - cd /tmp
-  - if [[ "$need_rebuild" == "true" ]]; then curl -L https://github.com/facebook/rocksdb/archive/rocksdb-4.3.1.tar.gz -o rocksdb.tar.gz && tar xf rocksdb.tar.gz && cd rocksdb-rocksdb-4.3.1 && make shared_lib && cp librocksdb.so* $rocksdb_dir; fi
-  - popd
+  - export KCOV_DIR=$HOME/.cache/kcov
+  - export ROCKSDB_DIR=$HOME/.cache/rocksdb
+  - make -f travis-build/Makefile prepare_${TRAVIS_OS_NAME}
 
 script:
-  - export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$rocksdb_dir"
-  - export LIBRARY_PATH="$LD_LIBRARY_PATH"
-  - ENABLE_FEATURES=default make test
+  - make -f travis-build/Makefile test_${TRAVIS_OS_NAME}
+  - make -f travis-build/Makefile cover_${TRAVIS_OS_NAME}

README.md

@@ -1,7 +1,7 @@
 ## TiKV is a distributed Key-Value (KV) database powered by Rust
 
 
-[![Build Status](https://travis-ci.org/pingcap/tikv.svg?branch=master)](https://travis-ci.org/pingcap/tikv)
+[![Build Status](https://travis-ci.org/pingcap/tikv.svg?branch=master)](https://travis-ci.org/pingcap/tikv) [![Coverage Status](https://coveralls.io/repos/github/pingcap/tikv/badge.svg?branch=master)](https://coveralls.io/github/pingcap/tikv)
 
 
 TiKV is a distributed Key-Value database which is based on the design of Google Spanner and HBase, but is much simpler without dependency on any distributed file system. With the implementation of the Raft consensus algorithm in Rust and consensus state storing in RocksDB, it guarantees data consistency. Placement driver which is introduced to implement sharding enables automatic data migration. The transaction model is similar to Google's Percolator with some performance improvements. TiKV also provides snapshot isolation (SI), serializable snapshot isolation (SSI), and externally consistent reads and writes in distributed transactions. See [Tikv-server software stack](#tikv-server-software-stack) for more information. TiKV has the following primary features:

travis-build/Makefile

@@ -0,0 +1,54 @@
+${ROCKSDB_DIR}/libgflags.a:
+	cd /tmp && \
+	curl -L https://github.com/gflags/gflags/archive/v2.1.2.tar.gz -o gflags.tar.gz && \
+	tar xf gflags.tar.gz && \
+	cd gflags-2.1.2 && \
+	cmake . && \
+	make && \
+	mkdir -p ${ROCKSDB_DIR} && \
+	cp lib/* ${ROCKSDB_DIR} && \
+	cp -r include ${ROCKSDB_DIR}
+
+${ROCKSDB_DIR}/librocksdb.so: ${ROCKSDB_DIR}/libgflags.a
+	export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${ROCKSDB_DIR}" && \
+	export LIBRARY_PATH="${LIBRARY_PATH}:${ROCKSDB_DIR}" && \
+	export CPLUS_INCLUDE_PATH="${CPLUS_INCLUDE_PATH}:${ROCKSDB_DIR}/include" && \
+	export CXX=${COMPILER} && \
+	cd /tmp && \
+	curl -L https://github.com/facebook/rocksdb/archive/rocksdb-4.3.1.tar.gz -o rocksdb.tar.gz && \
+	tar xf rocksdb.tar.gz && \
+	cd rocksdb-rocksdb-4.3.1 && \
+	make shared_lib && \
+	cp librocksdb.so* ${ROCKSDB_DIR}
+
+${KCOV_DIR}/kcov:
+	cd /tmp && \
+	curl -L https://github.com/SimonKagstrom/kcov/archive/v31.tar.gz -o kcov.tar.gz && \
+	tar xf kcov.tar.gz && \
+	cd kcov-31 && \
+	cmake . && \
+	make && \
+	mkdir -p ${KCOV_DIR} && \
+	cp src/kcov ${KCOV_DIR}/kcov
+
+prepare_linux: ${ROCKSDB_DIR}/librocksdb.so ${KCOV_DIR}/kcov
+
+prepare_osx:
+	brew install gflags snappy rocksdb
+
+test_linux:
+	export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${ROCKSDB_DIR}" && \
+	export LIBRARY_PATH="${LIBRARY_PATH}:${ROCKSDB_DIR}" && \
+	ulimit -n 2000 && \
+	ENABLE_FEATURES=default make test 2>&1 | tee tests.log
+
+test_osx:
+	ENABLE_FEATURES=default make test
+
+cover_linux:
+	export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${ROCKSDB_DIR}" && \
+	export LIBRARY_PATH="${LIBRARY_PATH}:${ROCKSDB_DIR}" && \
+	grep " Running " tests.log | sed -e 's/Running//g' | xargs -n 1 ${KCOV_DIR}/kcov --verify --coveralls-id=${TRAVIS_JOB_ID} --include-pattern tikv target/kcov
+
+cover_osx:
+