From d59cc42e2222d02c70ad8e3486ef662c6b45caeb Mon Sep 17 00:00:00 2001
From: Ettore Di Giacinto <mudler@gentoo.org>
Date: Tue, 26 May 2020 21:07:09 +0200
Subject: [PATCH] Add target to create smaller binary

---
 Dockerfile |  3 ++-
 Makefile   | 10 +++++++---
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index b9c2e550..c6602bb6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,7 @@
 FROM golang as builder
+RUN apt-get update && apt-get install upx
 ADD . /luet
-RUN cd /luet && make build
+RUN cd /luet && make build-small
 
 FROM scratch
 ENV LUET_NOLOCK=true
diff --git a/Makefile b/Makefile
index aef1487b..fac5c31f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 
 # go tool nm ./luet | grep Commit
-LDFLAGS += -X "github.com/mudler/luet/cmd.BuildTime=$(shell date -u '+%Y-%m-%d %I:%M:%S %Z')"
-LDFLAGS += -X "github.com/mudler/luet/cmd.BuildCommit=$(shell git rev-parse HEAD)"
+override LDFLAGS += -X "github.com/mudler/luet/cmd.BuildTime=$(shell date -u '+%Y-%m-%d %I:%M:%S %Z')"
+override LDFLAGS += -X "github.com/mudler/luet/cmd.BuildCommit=$(shell git rev-parse HEAD)"
 
 NAME ?= luet
 PACKAGE_NAME ?= $(NAME)
@@ -9,7 +9,6 @@ PACKAGE_CONFLICT ?= $(PACKAGE_NAME)-beta
 REVISION := $(shell git rev-parse --short HEAD || echo dev)
 VERSION := $(shell git describe --tags || echo $(REVISION))
 VERSION := $(shell echo $(VERSION) | sed -e 's/^v//g')
-ITTERATION := $(shell date +%s)
 BUILD_PLATFORMS ?= -osarch="linux/amd64" -osarch="linux/386" -osarch="linux/arm"
 ROOT_DIR:=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
 
@@ -66,6 +65,11 @@ deps:
 build:
 	CGO_ENABLED=0 go build -ldflags '$(LDFLAGS)'
 
+.PHONY: build-small
+build-small:
+	@$(MAKE) LDFLAGS+="-s -w" build
+	upx --brute $(NAME)
+
 .PHONY: image
 image:
 	docker build --rm -t luet/base .