Add support for protoc and grpc_php_plugin

src/scripts/tools/grpc_php_plugin.sh

@@ -0,0 +1,51 @@
+add_bazel() {
+  if [ ! "$(command -v bazel)" ]; then
+    os=$(uname -s)
+    if [ "$os" = "Linux" ]; then
+      ${apt_install:?} curl gnupg
+      curl "${curl_opts[@]:?}" https://bazel.build/bazel-release.pub.gpg | sudo apt-key add -
+      echo "deb [arch=amd64] https://storage.googleapis.com/bazel-apt stable jdk1.8" | sudo tee /etc/apt/sources.list.d/bazel.list
+      sudo "${debconf_fix:?}" apt-get update -y
+      ${apt_install:?} bazel
+    elif [ "$os" = "Darwin" ]; then
+      brew install bazel
+    fi
+  fi
+}
+
+get_grpc_tag() {
+  if [ "$grpc_tag" = "latest" ]; then
+    grpc_tag=$(curl "${curl_opts[@]:?}" https://grpc.io/release)
+  else
+    status_code=$(sudo curl -s -w "%{http_code}" -o /tmp/grpc.tmp "${curl_opts[@]:?}" "https://github.com/grpc/grpc/releases/tag/v$grpc_tag")
+    if [ "$status_code" = "200" ]; then
+      grpc_tag="v$grpc_tag"
+    else
+      grpc_tag=$(curl "${curl_opts[@]:?}" https://grpc.io/release)
+    fi
+  fi
+}
+
+add_grpc_php_plugin() {
+  grpc_tag=$1
+  get_grpc_tag
+  (
+    curl "${curl_opts[@]:?}" "https://github.com/grpc/grpc/archive/$grpc_tag.tar.gz" | tar -xz -C /tmp
+    cd "/tmp/grpc-${grpc_tag:1}" || exit
+    add_bazel
+    echo "os: $os"
+    echo "release: $DISTRIB_RELEASE"
+    if [ "$DISTRIB_RELEASE" = "16.04" ]; then
+      CC="$(command -v gcc)" CXX="$(command -v g++)" ./tools/bazel build src/compiler:grpc_php_plugin
+    else
+      ./tools/bazel build src/compiler:grpc_php_plugin
+    fi
+    sudo mv ./bazel-bin/src/compiler/grpc_php_plugin /usr/local/bin/grpc_php_plugin
+    sudo chmod a+x /usr/local/bin/grpc_php_plugin
+  ) >/dev/null 2>&1
+  echo "::set-output name=grpc_php_plugin_path::/usr/local/bin/grpc_php_plugin"
+  add_log "${tick:?}" "grpc_php_plugin" "Added"
+  printf "::group::\033[34;1m%s \033[0m\033[90;1m%s \033[0m\n" "grpc_php_plugin" "Click to read the grpc_php_plugin related license information"
+  cat "/tmp/grpc-${grpc_tag:1}/LICENSE"
+  echo "::endgroup::"
+}