bugfix/fix build protoc dependency (#79)

build.sh

@@ -28,6 +28,16 @@ build_backend() {
 }
 
 build_onnx_graph() {
+
+    cd $TOP_DIR/visualdl/server
+    if [ ! -d protoc3 ]; then
+        # manully install protobuf3
+        curl -OL https://github.com/google/protobuf/releases/download/v3.1.0/protoc-3.1.0-linux-x86_64.zip
+        unzip protoc-3.1.0-linux-x86_64.zip -d protoc3
+        chmod +x protoc3/bin/*
+    fi
+
+    export PATH="$PATH:$(pwd)/protoc3/bin"
     # TODO(ChunweiYan) check protoc version here
     cd $TOP_DIR/visualdl/server/onnx
     protoc onnx.proto --python_out .

setup.py

@@ -27,7 +27,7 @@ VERSION_NUMBER = read('VERSION_NUMBER')
 LICENSE = readlines('LICENSE')[0].strip()
 
 install_requires = ['Flask', 'numpy', 'Pillow', 'protobuf']
-execute_requires = ['npm', 'node', 'protoc', 'bash']
+execute_requires = ['npm', 'node', 'bash']
 
 
 def die(msg):