new build regime

* use new makefile style, remove two previous build systems
* multi-stage build for the tiniest image

Dockerfile

@@ -1,16 +1,11 @@
-FROM alpine:3.5
-
-COPY docker/start.sh /bin/start.sh
-CMD ["/bin/start.sh"]
-
+FROM golang:alpine as builder
 COPY main.go /go/src/github.com/discourse/discourse-auth-proxy/
+RUN apk add git
+RUN cd /go/src/github.com/discourse/discourse-auth-proxy \
+  && go get \
+  && go build
 
-RUN apk add --no-cache -t build-deps build-base git go mercurial \
-	&& export GOPATH=/go \
-	&& cd /go/src/github.com/discourse/discourse-auth-proxy \
-	&& go get \
-	&& go build -o /bin/discourse-auth-proxy \
-	&& apk del --purge build-deps \
-	# Don't ask me why, but purging the go package leaves behind about
-	# 8MB of cruft in /usr/lib/go which we have to nuke by hand
-	&& rm -rf /go /usr/lib/go
+FROM alpine:latest
+COPY --from=builder /go/bin/discourse-auth-proxy /bin/
+COPY start.sh /bin/start.sh
+CMD ["/bin/start.sh"]

Makefile

@@ -0,0 +1,14 @@
+IMAGE := discourse/auth-proxy
+TAG := $(shell date -u +%Y%m%d.%H%M%S)
+
+.PHONY: default
+default: push
+	@printf "${IMAGE}:${TAG} ready\n"
+
+.PHONY: push
+push: build
+	docker push ${IMAGE}:${TAG}
+
+.PHONY: build
+build:
+	docker build -t ${IMAGE}:${TAG} .

README.md

@@ -43,7 +43,7 @@ Docker Image
 You may run using docker using
 
 ```
-docker run samsaffron/discourse-auth-proxy
+docker run discourse/discourse-auth-proxy
 ```
 
 Running will display configuration instructions

build

@@ -1,6 +0,0 @@
-#!/bin/bash
-
-set -e
-
-docker build --build-arg=http_proxy=$http_proxy -t discourse/auth-proxy .
-docker push discourse/auth-proxy

docker/Dockerfile

@@ -1,6 +0,0 @@
-FROM gliderlabs/alpine
-
-ADD build_image/discourse-auth-proxy /bin/discourse-auth-proxy
-ADD start.sh /bin/start.sh
-
-CMD ["/bin/start.sh"]

docker/build.rb

@@ -1,40 +0,0 @@
-require 'pty'
-
-version = "1.0.0"
-$nocache = false
-
-def run(command)
-  lines = []
-  PTY.spawn(command) do |stdin, stdout, pid|
-    begin
-      stdin.each do |line|
-        lines << line
-        puts line
-      end
-    rescue Errno::EIO
-      # we are done
-    end
-  end
-
-  lines
-end
-
-
-def build(path)
-  lines = run("cd #{path} && docker build #{$nocache ? "--no-cache" : ""} .")
-  lines[-1]["successfully built ".length..-1].strip
-end
-
-img = build("build_image")
-pwd = `pwd`.strip
-run "docker run --rm -it -v #{pwd}/build_image:/shared #{img}"
-
-repo = "samsaffron/discourse-auth-proxy"
-tag = "#{repo}:#{version}"
-latest = "#{repo}:#{latest}"
-
-img = build(".")
-run "docker tag -f #{img} #{tag}"
-run "docker tag -f #{img} #{latest}"
-
-

docker/build_image/Dockerfile

@@ -1,11 +0,0 @@
-FROM gliderlabs/alpine
-
-RUN apk --update add bash git go mercurial
-RUN mkdir -p /gopath/src/github.com/discourse && cd /gopath/src/github.com/discourse && git clone https://github.com/discourse/discourse-auth-proxy
-ENV GOPATH /gopath
-RUN mkdir -p /gopath
-RUN cd /gopath/src/github.com/discourse/discourse-auth-proxy && go get
-RUN cd /gopath/src/github.com/discourse/discourse-auth-proxy && CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-w' .
-
-CMD cp /gopath/src/github.com/discourse/discourse-auth-proxy/discourse-auth-proxy /shared
-

start.sh

@@ -29,7 +29,7 @@ if [ -z "$GOOD" ]; then
   echo "SSO_URL=http://someurl"
   echo "HOST_PORT=3001"
   echo
-  echo "docker run -d --restart=always -e ORIGIN_URL=\$ORIGIN_URL -e PROXY_URL=http://0.0.0.0:80 -e SSO_SECRET=\$SSO_SECRET -e SSO_URL=\$SSO_URL -p \$HOST_PORT:80 samsaffron/discourse-auth-proxy"
+  echo "docker run -d --restart=always -e ORIGIN_URL=\$ORIGIN_URL -e PROXY_URL=http://0.0.0.0:80 -e SSO_SECRET=\$SSO_SECRET -e SSO_URL=\$SSO_URL -p \$HOST_PORT:80 discourse/discourse-auth-proxy"
 else
   exec /bin/discourse-auth-proxy
 fi