Feature: Add goctl env (#1557)

tools/goctl/env/env.go

@@ -0,0 +1,17 @@
+package env
+
+import (
+	"fmt"
+
+	"github.com/urfave/cli"
+	"github.com/zeromicro/go-zero/tools/goctl/pkg/env"
+)
+
+func Action(c *cli.Context) error {
+	write := c.StringSlice("write")
+	if len(write) > 0 {
+		return env.WriteEnv(write)
+	}
+	fmt.Println(env.Print())
+	return nil
+}