From dfb5ee3dd41c1c4749d4e297f5187a5843ab65e3 Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Sat, 8 Aug 2020 12:51:45 -0400
Subject: [PATCH] Linkstamp the binaries when building with make.

---
 Makefile      |  9 +++++++--
 mailpopbox.go | 11 +++++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 6620afd..65608a7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,17 @@
 .PHONY:
 all: coverage mac linux
 
+DIRTY=$(shell [[ -z `git status --untracked-files=no --porcelain` ]] || echo "-dirty")
+GITHASH=$(shell git log --pretty='%H' -1)
+
+LDFLAG=-ldflags "-X 'main.versionGit=$(GITHASH)$(DIRTY)'"
+
 coverage:
 	go test -coverprofile ./cover.out ./...
 	go tool cover -html=cover.out -o cover.html
 
 mac:
-	GOOS=darwin GOARCH=amd64 go build -o mailpopbox-mac-amd64
+	GOOS=darwin GOARCH=amd64 go build -o mailpopbox-mac-amd64 $(LDFLAG)
 
 linux:
-	GOOS=linux GOARCH=amd64 go build -o mailpopbox-linux-amd64
+	GOOS=linux GOARCH=amd64 go build -o mailpopbox-linux-amd64 $(LDFLAG)
diff --git a/mailpopbox.go b/mailpopbox.go
index 50dc504..af2c369 100644
--- a/mailpopbox.go
+++ b/mailpopbox.go
@@ -14,12 +14,23 @@ import (
 	"go.uber.org/zap"
 )
 
+var (
+	versionGit = "development"
+	versionNumber = "2.0.0"
+	versionString = "mailpopbox " + versionNumber + " (" + versionGit + ")\n"
+)
+
 func main() {
 	if len(os.Args) != 2 {
 		fmt.Fprintf(os.Stderr, "Usage: %s config.json\n", os.Args[0])
 		os.Exit(1)
 	}
 
+	if os.Args[1] == "version" {
+		fmt.Print(versionString)
+		os.Exit(0)
+	}
+
 	configFile, err := os.Open(os.Args[1])
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "config file: %s\n", err)
-- 
2.22.5