improve gcmd with arguments parser

.example/os/console.go

@@ -1,22 +0,0 @@
-package main
-
-import (
-	"fmt"
-
-	"github.com/gogf/gf/os/gcmd"
-)
-
-func doEcho() {
-	fmt.Println("do echo")
-}
-
-func main() {
-	fmt.Println(gcmd.Value.GetAll())
-
-	fmt.Println(gcmd.Value.Get(1))
-
-	gcmd.BindHandle("echo", doEcho)
-	gcmd.RunHandle("echo")
-
-	gcmd.AutoRun()
-}

.example/os/gcmd/gcmd1.go

@@ -1,21 +0,0 @@
-package main
-
-import (
-	"fmt"
-
-	"github.com/gogf/gf/os/gcmd"
-)
-
-func help() {
-	fmt.Println("This is help.")
-}
-
-func test() {
-	fmt.Println("This is test.")
-}
-
-func main() {
-	gcmd.BindHandle("help", help)
-	gcmd.BindHandle("test", test)
-	gcmd.AutoRun()
-}

.example/other/test2.go

@@ -1,11 +1,13 @@
 package main
 
 import (
-	"fmt"
-
-	"github.com/gogf/gf/os/gfile"
+	"github.com/gogf/gf/frame/g"
+	"github.com/gogf/gf/text/gregex"
 )
 
 func main() {
-	fmt.Println(gfile.TempDir())
+	s := `-abc`
+	m, err := gregex.MatchString(`^\-{1,2}a={0,1}(.*)`, s)
+	g.Dump(err)
+	g.Dump(m)
 }