From d17581237f13df0b3608ac88782d4b508f53037d Mon Sep 17 00:00:00 2001
From: Andras Ferencz-Szabo <andrasferenczszabo@monzo.com>
Date: Mon, 9 Sep 2019 11:49:16 +0100
Subject: [PATCH] Add make dist command to build version binary releases

---
 Makefile  | 21 ++++++++++++++++++---
 README.md |  7 +++++++
 dist.sh   | 28 ++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+), 3 deletions(-)
 create mode 100755 dist.sh

diff --git a/Makefile b/Makefile
index a5098d3..de678a4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,34 +1,49 @@
-.PHONY: all clean test build
-
 DOCKER_REPOSITORY ?= monzo
 DOCKER_TAG ?= latest
 DOCKER_IMAGE ?= $(DOCKER_REPOSITORY)/kontrast:$(DOCKER_TAG)
 
+ALL_GOARCH = amd64
+ALL_GOOS = linux darwin
+
+.PHONY: clean
 clean:
-	rm -f bin/
+	rm -rf bin/
 
+.PHONY: build
 build:
 	mkdir -p bin/
 	dep ensure -v
 	go build -o bin/kontrast ./cmd/kontrast
 
+.PHONY: kontrastd
 kontrastd:
 	mkdir -p bin/
 	dep ensure -v
 	go build -o bin/kontrastd ./cmd/kontrastd
 
+.PHONY: build-in-docker
 build-in-docker:
 	dep ensure -vendor-only -v
 	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /out/kontrastd ./cmd/kontrastd
 
+.PHONY: build-linux
 build-linux:
 	mkdir -p bin/
 	dep ensure -v
 	GOOS=linux go build -o bin/kontrast ./cmd/kontrast
 
+.PHONY: dist
+dist:
+	$(eval export ALL_GOARCH)
+	$(eval export ALL_GOOS)
+	mkdir -p bin/
+	NAME=kontrast ./dist.sh
+
+.PHONY: docker
 docker:
 	docker build . -t $(DOCKER_IMAGE)
 
+.PHONY: docker-push
 docker-push: docker
 	docker push $(DOCKER_IMAGE)
 
diff --git a/README.md b/README.md
index d5019d0..14fc759 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,13 @@ Note: this takes a while [1]
 `kontrast my-manifest.yaml`
 
 
+## Release process
+
+1. Create a new semver version tag on master in "v0.1.2" format
+2. Push the tag
+3. Run `make clean dist` to build the binary releases
+4. Create a new release on Github and upload all files from `bin/`
+
 ---
 ###### [1] Why does it take so long to build/install? Why is the binary 150MB?
 
diff --git a/dist.sh b/dist.sh
new file mode 100755
index 0000000..54419fe
--- /dev/null
+++ b/dist.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+set -eo pipefail
+
+VERSION=""
+if [ -z "${VERSION}" ]; then
+  VERSION=$(git tag | sort -r --version-sort | head -n1)
+fi
+
+if [ -z "${VERSION}" ]; then
+  echo "VERSION can not be empty"
+fi
+
+VERSION=${VERSION/v/}
+
+echo "Building version ${VERSION}"
+
+mkdir -p bin
+
+for arch in ${ALL_GOARCH}; do
+  for platform in ${ALL_GOOS}; do
+    file="bin/${NAME}-${VERSION}.${platform}.${arch}"
+    echo "Building ${file}"
+    CGO_ENABLED=0 GOOS=${platform} GOARCH=${arch} go build -ldflags="-s -w" -o ${file} ./cmd/${NAME}
+  done
+done
+
+cd bin && shasum -a 256 ${NAME}-${VERSION}.* > ${NAME}-${VERSION}.sha256sums