Use a released version of protoc

.travis.yml

@@ -11,7 +11,7 @@ cache:
   - $HOME/local
   - ${TRAVIS_BUILD_DIR}/examples/browser/node_modules
 before_install:
-- ./.travis/build-protoc.sh 3.0.0-beta-3
+- ./.travis/install-protoc.sh 3.0.0
 - ./.travis/install-swagger-codegen.sh 2.1.6
 - nvm install v6.1 && nvm use v6.1 && node --version
 - go get github.com/golang/lint/golint

.travis/install-protoc.sh

@@ -0,0 +1,19 @@
+#!/bin/sh -eu
+protoc_version=$1
+if test -z "${protoc_version}"; then
+	echo "Usage: .travis/install-protoc.sh protoc-version"
+	exit 1
+fi
+if [ "`$HOME/local/bin/protoc-${protoc_version} --version 2>/dev/null | cut -d' ' -f 2`" != ${protoc_version} ]; then
+	rm -rf $HOME/local/bin $HOME/local/include
+
+	mkdir -p $HOME/tmp $HOME/local
+	cd $HOME/tmp
+	wget https://github.com/google/protobuf/releases/download/v${protoc_version}/protoc-${protoc_version}-linux-x86_64.zip
+	unzip protoc-${protoc_version}-linux-x86_64.zip
+	mv bin $HOME/local/bin
+	mv include $HOME/local/include
+fi
+
+echo \$ $HOME/local/bin/protoc --version
+$HOME/local/bin/protoc --version