add -v and Makefile to build releases

Makefile

@@ -0,0 +1,37 @@
+VERSION=0.5.0
+BUILD_DATE=$(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
+GIT_HASH=$(shell git rev-parse HEAD)
+
+RELEASES=bin/vopher-$(VERSION).linux.amd64 \
+		 bin/vopher-$(VERSION).linux.arm64 \
+		 bin/vopher-$(VERSION).linux.mips64 \
+		 bin/vopher-$(VERSION).windows.amd64.exe \
+		 bin/vopher-$(VERSION).freebsd.amd64 \
+		 bin/vopher-$(VERSION).darwin.amd64
+
+
+LDFLAGS=-ldflags "-X main.Version=$(VERSION) -X main.BuildDate=$(BUILD_DATE) -X main.GitHash=$(GIT_HASH)"
+
+
+releases: $(RELEASES)
+
+bin/vopher-$(VERSION).linux.mips64: bin
+	env GOOS=linux GOARCH=mips64 CGO_ENABLED=0 go build $(LDFLAGS) -o $@
+
+bin/vopher-$(VERSION).linux.amd64: bin
+	env GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build $(LDFLAGS) -o $@
+
+bin/vopher-$(VERSION).linux.arm64: bin
+	env GOOS=linux GOARCH=arm64 CGO_ENABLED=0 go build $(LDFLAGS) -o $@
+
+bin/vopher-$(VERSION).windows.amd64.exe: bin
+	env GOOS=windows GOARCH=amd64 CGO_ENABLED=0 go build $(LDFLAGS) -o $@
+
+bin/vopher-$(VERSION).darwin.amd64: bin
+	env GOOS=darwin GOARCH=amd64 CGO_ENABLED=0 go build $(LDFLAGS) -o $@
+
+bin/vopher-$(VERSION).freebsd.amd64: bin
+	env GOOS=freebsd GOARCH=amd64 CGO_ENABLED=0 go build $(LDFLAGS) -o $@
+
+bin:
+	mkdir $@

vopher.go

@@ -16,6 +16,12 @@ import (
 	"time"
 )
 
+var (
+	Version   = "0.5"
+	GitHash   = ""
+	BuildDate = ""
+)
+
 var allowed_actions = []string{
 	"u",
 	"up",
@@ -73,12 +79,14 @@ func main() {
 		ui        string
 		filter    stringList
 		supported bool
+		version   bool
 	}{action: "update", dir: "."}
 
 	flag.BoolVar(&cli.force, "force", cli.force, "force certain actions [prune, clean]")
 	flag.BoolVar(&cli.dry, "dry", cli.dry, "dry-run, show what would happen [prune, clean]")
 	flag.BoolVar(&cli.all, "all", cli.force, "don't keep <plugin>.zip around [prune]")
 	flag.BoolVar(&cli.supported, "list-supported-archives", false, "list all supported archive types")
+	flag.BoolVar(&cli.version, "v", false, "show version")
 	flag.StringVar(&cli.file, "f", cli.file, "path to list of plugins")
 	flag.StringVar(&cli.dir, "dir", cli.dir, "directory to extract the plugins to")
 	flag.StringVar(&cli.ui, "ui", cli.ui, "ui mode ('simple' or 'oneline', works with `update` action)")
@@ -87,6 +95,17 @@ func main() {
 	flag.Usage = usage
 	flag.Parse()
 
+	if cli.version {
+		fmt.Println("vopher:\t" + Version)
+		if GitHash != "" {
+			fmt.Println("git:\t" + GitHash)
+		}
+		if BuildDate != "" {
+			fmt.Println("build-date:\t" + BuildDate)
+		}
+		return
+	}
+
 	if cli.supported {
 		for _, suf := range supported_archives {
 			fmt.Println(suf)