From ce2faa39ebbedce19b67490ef9e96675c9d2b0f2 Mon Sep 17 00:00:00 2001
From: "Stephen McQuay (smcquay)" <stephen@mcquay.me>
Date: Thu, 8 Mar 2018 16:09:51 -0800
Subject: [PATCH] Add automatic version to build output

---
 Makefile | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 0022abc..87f622b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,22 @@
 .PHONY: default
 default: bin/hw bin/hwc bin/hwl
 
+VERSION := $(shell git describe --tags 2> /dev/null || echo "unreleased")
+V_DIRTY := $(shell git describe --exact-match HEAD 2> /dev/null > /dev/null || echo "-unreleased")
 bin/hw: cmd/hw/main.go bin
-	GOOS=linux go build -v -o bin/hw ./cmd/hw
+	@GOOS=linux go build -ldflags \
+		"-X mcquay.me/hw.Version=$(VERSION)$(V_DIRTY)" \
+		 -v -o bin/hw ./cmd/hw
 
 bin/hwc: cmd/hwc/main.go bin
-	GOOS=linux go build -v -o bin/hwc ./cmd/hwc
+	@GOOS=linux go build -ldflags \
+		"-X mcquay.me/hw.Version=$(VERSION)$(V_DIRTY)" \
+		 -v -o bin/hwc ./cmd/hwc
 
 bin/hwl: cmd/hwl/main.go bin
-	GOOS=linux go build -v -o bin/hwl ./cmd/hwl
+	@GOOS=linux go build -ldflags \
+		"-X mcquay.me/hw.Version=$(VERSION)$(V_DIRTY)" \
+		 -v -o bin/hwl ./cmd/hwl
 
 bin:
 	mkdir bin