From fb81bba9c6178fca0ff062828e0869e9331d1a4c Mon Sep 17 00:00:00 2001
From: Christopher Beard <cbeard9@bloomberg.net>
Date: Mon, 9 Nov 2020 11:40:51 -0500
Subject: [PATCH] Cache dependencies in docker build using go mod

---
 Dockerfile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 2c9b8181..0ec68c7a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,10 +4,14 @@ FROM golang:1.15.2-alpine as builder
 ENV BURROW_SRC /usr/src/Burrow/
 
 RUN apk add --no-cache git curl
-COPY . $BURROW_SRC
 WORKDIR $BURROW_SRC
 
-RUN go mod tidy && go build -o /tmp/burrow .
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . $BURROW_SRC
+RUN go build -o /tmp/burrow .
 
 # stage 2: runner
 FROM alpine:3.12