[KEYCLOAK-8487] Provide gatekeeper binaries for Linux, Windows and OSx

  - Build only for amd64
  - Replaces gzip by tar and generate each file based on the OS
  - Inclusion of sha1 files and set-version.sh script

Makefile

@@ -11,6 +11,8 @@ DEPS=$(shell go list -f '{{range .TestImports}}{{.}} {{end}}' ./...)
 PACKAGES=$(shell go list ./...)
 LFLAGS ?= -X main.gitsha=${GIT_SHA} -X main.compiled=${BUILD_TIME}
 VETARGS ?= -asmdecl -atomic -bool -buildtags -copylocks -methods -nilfunc -printf -rangeloops -shift -structtags -unsafeptr
+PLATFORMS=darwin linux windows
+ARCHITECTURES=amd64
 
 .PHONY: test authors changelog build docker static release lint cover vet glide-install
 
@@ -25,6 +27,14 @@ build: golang
 	@mkdir -p bin
 	go build -ldflags "${LFLAGS}" -o bin/${NAME}
 
+release: clean golang deps
+	@mkdir -p release
+	$(foreach GOOS, $(PLATFORMS),\
+	$(foreach GOARCH, $(ARCHITECTURES), $(shell [ $(GOOS) = "windows" ]  && EXT=".exe"; env GOOS=$(GOOS) GOARCH=$(GOARCH) CGO_ENABLED=0 \
+	go build -a -tags netgo -ldflags "-w ${LFLAGS}" -o bin/${NAME}$$EXT; \
+	tar -czvf release/${NAME}-$(GOOS)-$(GOARCH).tar.gz -C bin/ ${NAME}$$EXT >/dev/null; \
+  sha1sum release/${NAME}-$(GOOS)-$(GOARCH).tar.gz | cut -d " " -f1 > release/${NAME}-$(GOOS)-$(GOARCH).tar.gz.sha1 )))
+
 static: golang deps
 	@echo "--> Compiling the static binary"
 	@mkdir -p bin
@@ -66,14 +76,9 @@ certs:
 		-profile=server \
 		tests/proxy-csr.json | cfssljson -bare tests/proxy
 
-release: static
-	mkdir -p release
-	gzip -c bin/${NAME} > release/${NAME}_${VERSION}_linux_${HARDWARE}.gz
-	rm -f release/${NAME}
-
 clean:
-	rm -rf ./bin 2>/dev/null
-	rm -rf ./release 2>/dev/null
+	rm -rf ./bin/* 2>/dev/null
+	rm -rf ./release/* 2>/dev/null
 
 authors:
 	@echo "--> Updating the AUTHORS"

set-version.sh

@@ -0,0 +1,6 @@
+#!/bin/bash -e
+
+NEW_VERSION=$1
+
+CURRENT=`awk '/release.*=/ { print $3 }' doc.go | sed 's/"//g'`
+sed -i "s/$CURRENT/$NEW_VERSION/g" doc.go