Small tidy and speed up of the travis build (#6181)

Summary:
Cuts about 30-60 seconds to from each Travis Linux build, and about 15 minutes from each macOS build
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6181

Differential Revision: D19098357

Pulled By: pdillinger

fbshipit-source-id: 863dd1ab09076ad9b03c2b7914908359628315ae

.travis.yml

@@ -6,25 +6,34 @@ os:
 compiler:
   - clang
   - gcc
-osx_image: xcode8.3
+osx_image: xcode9.4
 jdk:
   - openjdk7
 cache:
   - ccache
-  - apt
 
 addons:
   apt:
     sources:
       - ubuntu-toolchain-r-test
     packages:
-      - curl
-      - g++-8
-      - libbz2-dev
       - libgflags-dev
+      - libbz2-dev
+      - liblz4-dev
       - libsnappy-dev
-      - mingw-w64
+      - liblzma-dev  # xv
+      - libzstd-dev
       - zlib1g-dev
+  homebrew:
+    update: true
+    packages:
+      - ccache
+      - gflags
+      - lz4
+      - snappy
+      - xz
+      - zstd
+
 env:
   - TEST_GROUP=platform_dependent # 16-18 minutes
   - TEST_GROUP=1 # 33-35 minutes
@@ -60,15 +69,17 @@ matrix:
   - os : osx
     compiler: gcc
 
-# https://docs.travis-ci.com/user/caching/#ccache-cache
 install:
   - if [ "${TRAVIS_OS_NAME}" == osx ]; then
-      brew install ccache gflags zstd lz4 snappy xz;
       PATH=$PATH:/usr/local/opt/ccache/libexec;
     fi
   - if [ "${JOB_NAME}" == cmake-gcc8 ]; then
+      sudo apt-get install -y g++-8;
       CC=gcc-8 && CXX=g++-8;
     fi
+  - if [ "${JOB_NAME}" == cmake-mingw ]; then
+      sudo apt-get install -y mingw-w64 ;
+    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

db/db_block_cache_test.cc

@@ -10,6 +10,7 @@
 #include "cache/lru_cache.h"
 #include "db/db_test_util.h"
 #include "port/stack_trace.h"
+#include "util/compression.h"
 
 namespace rocksdb {
 
@@ -685,16 +686,18 @@ TEST_F(DBBlockCacheTest, CacheCompressionDict) {
 
   // Try all the available libraries that support dictionary compression
   std::vector<CompressionType> compression_types;
-#ifdef ZLIB
+  if (Zlib_Supported()) {
     compression_types.push_back(kZlibCompression);
-#endif  // ZLIB
-#if LZ4_VERSION_NUMBER >= 10400
+  }
+  if (LZ4_Supported()) {
     compression_types.push_back(kLZ4Compression);
     compression_types.push_back(kLZ4HCCompression);
-#endif  // LZ4_VERSION_NUMBER >= 10400
-#if ZSTD_VERSION_NUMBER >= 500
+  }
+  if (ZSTD_Supported()) {
     compression_types.push_back(kZSTD);
-#endif  // ZSTD_VERSION_NUMBER >= 500
+  } else if (ZSTDNotFinal_Supported()) {
+    compression_types.push_back(kZSTDNotFinalCompression);
+  }
   Random rnd(301);
   for (auto compression_type : compression_types) {
     Options options = CurrentOptions();