Crash nicely on no argument.

aledbf · May 29, 2018 · 8e74638 · 8e74638
1 parent 19e50ec
commit 8e74638
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/main.go b/main.go
@@ -4,6 +4,7 @@ package deno
 
 import (
  "flag"
+ "fmt"
  "github.com/ry/v8worker2"
  "os"
  "runtime/pprof"
@@ -69,6 +70,12 @@ var main_map string
 func Init() {
  workerArgs = FlagsParse()
 
+ if len(workerArgs) == 0 {
+ fmt.Fprintf(os.Stderr, "Usage: %s file.ts\n", os.Args[0])
+ flag.PrintDefaults()
+ os.Exit(1)
+ }
+
  // Maybe start Golang CPU profiler.
  // Use --prof for profiling JS.
  if *flagGoProf != "" {