Add runtime version reporting

cmd/releasekit/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo"
+)
+
+func main() {
+	os.Exit(run(os.Args[1:], os.Stdout, os.Stderr))
+}
+
+func run(args []string, stdout, stderr io.Writer) int {
+	if len(args) == 1 && args[0] == "version" {
+		fmt.Fprintf(stdout, "releasekit %s\n", buildinfo.Version())
+		return 0
+	}
+
+	fmt.Fprintln(stderr, "usage: releasekit version")
+	return 2
+}