Golang v2 environment -- runtime and builder (#427)

v2 environment for Go; includes runtime and builder.

environments/go/builder/Dockerfile

@@ -1,5 +1,14 @@
-FROM golang:1.8.1
+ARG BUILDER_IMAGE=fission/builder
+ARG GO_VERSION=1.9.2
+
+FROM ${BUILDER_IMAGE}
+
+FROM golang:${GO_VERSION}
+
+COPY --from=0 /builder /builder
 
 ENV GOPATH /usr
 RUN go get github.com/fission/fission
 
+ADD build.sh /usr/local/bin/build
+

environments/go/builder/build.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cd ${SRC_PKG}
+go build -buildmode=plugin -i -o ${DEPLOY_PKG} .

environments/go/builder/go-function-build

@@ -1,11 +0,0 @@
-#!/bin/sh
-
-if [ $# -eq 0 ]
-then
-    echo "No arguments, building current dir"
-    filename='.'
-else
-    filename=$1
-fi
-
-docker run --rm -v $(pwd):/build -w /build fission/go-builder:1.8.1 go build -buildmode=plugin -o function.so $filename && echo "Compiled plugin: function.so. Use 'fission function create' to upload to fission."