Add build date to LDFLAGS

Makefile

@@ -1,14 +1,19 @@
-LUME_VERSION ?= $(shell git describe --tags --always)
-LDFLAGS := ${LDFLAGS} -X git.kill0.net/chill9/lume/cmd.Version=${LUME_VERSION}
 
 ifeq ($(OS), Windows_NT)
     EXE=lume.exe
 	RM=del /f /q
+	BUILD_DATE=$(shell powershell Get-Date -Format "yyyy-MM-ddThh:mm:sszzz")
 else
     EXE=lume
     EXE=rm -f
+	BUILD_DATE=$(shell date --iso-8601=seconds)
 endif
 
+LUME_VERSION ?= $(shell git describe --tags --always)
+LDFLAGS := ${LDFLAGS} \
+	-X git.kill0.net/chill9/lume/cmd.Version=${LUME_VERSION} \
+	-X git.kill0.net/chill9/lume/cmd.BuildDate=${BUILD_DATE}
+
 .PHONY: build
 build:
 	go build -o ${EXE} -ldflags="${LDFLAGS}" ./cmd/lume

cmd/main.go

@@ -30,6 +30,7 @@ func init() {
 }
 
 var Version string = "0.1.0-pre"
+var BuildDate string
 
 const lumercFile string = ".lumerc"
 

cmd/version.go

@@ -19,5 +19,8 @@ func VersionCmd(args CmdArgs) (int, error) {
 	fmt.Printf("lume %s\n", Version)
 	fmt.Printf("  os/arch: %s/%s\n", runtime.GOOS, runtime.GOARCH)
 	fmt.Printf("  go version: %s\n", runtime.Version())
+	if BuildDate != "" {
+		fmt.Printf("  build date: %s\n", BuildDate)
+	}
 	return ExitSuccess, nil
 }