add: random utf8 file generation

cmd/spawn/main.go

@@ -5,6 +5,7 @@ import (
 	"os"
 
 	"github.com/prajeenrg/spawn/pkg/image"
+	"github.com/prajeenrg/spawn/pkg/text"
 	"github.com/urfave/cli/v2"
 )
 
@@ -50,5 +51,19 @@ func main() {
 				return nil
 			},
 		},
+		{
+			Name:  "text",
+			Usage: "generate dummy text files",
+			Flags: []cli.Flag{
+				&cli.StringFlag{Name: "file", Aliases: []string{"f"}, Required: true},
+				&cli.UintFlag{Name: "size", Aliases: []string{"s"}, Value: 100},
+			},
+			Action: func(ctx *cli.Context) error {
+				name := ctx.String("file")
+				size := ctx.Uint("size")
+				text.MakeDummyFile(name, size)
+				return nil
+			},
+		},
 	}
 }

pkg/text/text.go

@@ -0,0 +1,19 @@
+package text
+
+import (
+	"log"
+
+	"github.com/prajeenrg/spawn/pkg/util"
+)
+
+func MakeDummyFile(name string, size uint) {
+	file := util.CreateFile(name)
+	defer file.Close()
+
+	_, b := util.GetRandomBytes(size)
+	_, err := file.Write(b)
+
+	if err != nil {
+		log.Fatalf("Writing to %s failed", name)
+	}
+}