Try installing protobuf without homebrew

(cherry picked from commit 8c006b4)

Author: rdegnan

.travis.yml

@@ -2,29 +2,46 @@ sudo: required
 jobs:
   include:
   - stage: build
+    language: cpp
     os: linux
     jdk: oraclejdk8
-    language: generic
     before_install:
     - wget https://github.com/google/protobuf/releases/download/v3.6.1/protobuf-cpp-3.6.1.tar.gz
     - tar -xzvf protobuf-cpp-3.6.1.tar.gz
-    - pushd protobuf-3.6.1 && ./configure --disable-shared && make && sudo make install
-      && popd
+    - pushd protobuf-3.6.1
+    - ./configure --disable-shared && make && sudo make install
+    - popd
+    script: "./ci/travis.sh"
+  - stage: build
+    language: cpp
+    os: windows
+    filter_secrets: false
+    env:
+    - GRADLE_OPTS="-Dorg.gradle.daemon=false"
+    before_install:
+    - rm -r "/c/Program Files (x86)/Microsoft Visual Studio 14.0"
+    - export PATH=$PATH:"/c/Program Files (x86)/Microsoft Visual Studio/2017/BuildTools/VC/Tools/MSVC/14.16.27023/bin/HostX86/x64"
+    - choco install -y jdk8 --version 8.0.201
+    - export PATH=$PATH:"/c/Program Files/Java/jdk1.8.0_201/bin"
+    - wget https://github.com/google/protobuf/releases/download/v3.6.1/protobuf-cpp-3.6.1.tar.gz
+    - tar -xzf protobuf-cpp-3.6.1.tar.gz
+    - pushd protobuf-3.6.1/cmake
+    - mkdir build && cd build
+    - cmake -A x64 -DCMAKE_INSTALL_PREFIX="/c/Program Files/protobuf" -DCMAKE_CXX_FLAGS="-std=c++11 -EHsc" -Dprotobuf_BUILD_TESTS=OFF ..
+    - cmake --build . --config Release --target install
+    - popd
     script: "./ci/travis.sh"
   - stage: deploy
+    language: cpp
     os: osx
-    osx_image: xcode9.4
-    language: generic
-    env:
-    - HOMEBREW_TEMP="/tmp"
-    - LDFLAGS="/usr/local/lib/libprotobuf.a /usr/local/lib/libprotoc.a"
+    osx_image: xcode10.1
+    compiler: clang
     before_install:
-    - brew update
-    - pushd $(brew --repo)/Library/Taps/homebrew/homebrew-core
-    - git checkout 25a1892 Formula/protobuf.rb
-    - EDITOR="sed -i '' 's/system \".\/configure\",/system \".\/configure\", \"--disable-shared\",/g'"
-      brew edit protobuf
-    - brew install protobuf
+    - curl -O -L https://github.com/google/protobuf/releases/download/v3.6.1/protobuf-cpp-3.6.1.tar.gz
+    - tar -xzf protobuf-cpp-3.6.1.tar.gz
+    - pushd protobuf-3.6.1
+    - ./autogen.sh
+    - ./configure --disable-shared && make && sudo make install
     - popd
     script: "./ci/travis.sh"
 before_cache:

publication.gradle

@@ -11,7 +11,6 @@ configure(subprojects.findAll {it.name != 'rsocket-rpc-protobuf'}) {
 	  options.with {
 		links 'https://docs.oracle.com/javase/8/docs/api/'
 		links 'https://projectreactor.io/docs/core/release/api/'
-		links 'https://netty.io/4.1/api/'
 	  }
 	}