Disable unnecessary java and cmake builds in travis (#150)

Signed-off-by: Yi Wu <yiwu@pingcap.com>

.travis.yml

@@ -32,14 +32,10 @@ env:
  - TEST_GROUP=3 # 20-22 minutes
  - TEST_GROUP=4 # 12-14 minutes
  # Run java tests
- - JOB_NAME=java_test # 4-11 minutes
  # Build ROCKSDB_LITE
  - JOB_NAME=lite_build # 3-4 minutes
  # Build examples
  - JOB_NAME=examples # 5-7 minutes
- - JOB_NAME=cmake # 3-5 minutes
- - JOB_NAME=cmake-gcc8 # 3-5 minutes
- - JOB_NAME=cmake-mingw # 3 minutes
 
 matrix:
  exclude:
@@ -51,10 +47,6 @@ matrix:
  env: TEST_GROUP=3
  - os: osx
  env: TEST_GROUP=4
- - os: osx
- env: JOB_NAME=cmake-gcc8
- - os : osx
- env: JOB_NAME=cmake-mingw
  - os : linux
  compiler: clang
  - os : osx
@@ -66,15 +58,6 @@ install:
  brew install ccache zstd lz4 snappy xz;
  PATH=$PATH:/usr/local/opt/ccache/libexec;
  fi
- - if [ "${JOB_NAME}" == cmake-gcc8 ]; then
- CC=gcc-8 && CXX=g++-8;
- fi
- - if [[ "${JOB_NAME}" == cmake* ]] && [ "${TRAVIS_OS_NAME}" == linux ]; then
- mkdir cmake-dist && curl -sfSL https://github.com/Kitware/CMake/releases/download/v3.14.5/cmake-3.14.5-Linux-x86_64.tar.gz | tar --strip-components=1 -C cmake-dist -xz && export PATH=$PWD/cmake-dist/bin:$PATH;
- fi
- - if [[ "${JOB_NAME}" == java_test ]]; then
- java -version && echo "JAVA_HOME=${JAVA_HOME}";
- fi
 
 before_script:
  # Increase the maximum number of open file descriptors, since some tests use
@@ -102,22 +85,12 @@ script:
  ;;
  esac
  - case $JOB_NAME in
- java_test)
- OPT=-DTRAVIS V=1 make rocksdbjava jtest
- ;;
  lite_build)
  OPT='-DTRAVIS -DROCKSDB_LITE' V=1 make -j4 static_lib tools
  ;;
  examples)
  OPT=-DTRAVIS V=1 make -j4 static_lib && cd examples && make -j4
  ;;
- cmake-mingw)
- sudo update-alternatives --set x86_64-w64-mingw32-g++ /usr/bin/x86_64-w64-mingw32-g++-posix;
- mkdir build && cd build && cmake -DJNI=1 .. -DCMAKE_CXX_FLAGS=-fno-asynchronous-unwind-tables -DCMAKE_C_COMPILER=x86_64-w64-mingw32-gcc -DCMAKE_CXX_COMPILER=x86_64-w64-mingw32-g++ -DCMAKE_SYSTEM_NAME=Windows && make -j4 rocksdb rocksdbjni
- ;;
- cmake*)
- mkdir build && cd build && cmake -DJNI=1 .. -DCMAKE_BUILD_TYPE=Release && make -j4 rocksdb rocksdbjni
- ;;
  esac
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