Merge pull request #22 from tkms0106/5_version

add a --version command line argument

Author: fiatjaf

Makefile

@@ -1,3 +1,3 @@
 all:
 	mkdir -p dist
-	gox -ldflags="-s -w" -tags="full" -osarch="darwin/amd64 linux/386 linux/amd64 linux/arm freebsd/amd64 windows/amd64" -output="dist/jiq_{{.OS}}_{{.Arch}}" github.com/fiatjaf/jiq/cmd/jiq
+	gox -ldflags="-s -w -X main.version=$(shell git describe --tags)" -tags="full" -osarch="darwin/amd64 linux/386 linux/amd64 linux/arm freebsd/amd64 windows/amd64" -output="dist/jiq_{{.OS}}_{{.Arch}}" github.com/fiatjaf/jiq/cmd/jiq

cmd/jiq/jiq.go

@@ -7,9 +7,15 @@ import (
 	"github.com/fiatjaf/jiq"
 )
 
+var version string
+
 func main() {
 	content := os.Stdin
 
+	if len(os.Args) > 1 && os.Args[1] == "--version" {
+		fmt.Println(version)
+		os.Exit(0)
+	}
 	if len(os.Args) > 1 && os.Args[1] == "--help" {
 		fmt.Print(`jiq - interactive commandline JSON processor
 Usage: <json string> | jiq [options] [initial filter]