From 22b7b2b95312bee21f35ea10b351c29fadd1c439 Mon Sep 17 00:00:00 2001
From: John Guo <john@johng.cn>
Date: Sun, 21 Nov 2021 22:38:47 +0800
Subject: [PATCH] comment updates for package gcmd

---
 os/gcmd/gcmd_command_help.go | 4 ++--
 os/gcmd/gcmd_command_run.go  | 9 ++++++++-
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/os/gcmd/gcmd_command_help.go b/os/gcmd/gcmd_command_help.go
index 72335c4df..1e482650e 100644
--- a/os/gcmd/gcmd_command_help.go
+++ b/os/gcmd/gcmd_command_help.go
@@ -114,14 +114,14 @@ func (c *Command) Print() {
 		buffer.WriteString(gstr.WordWrap(gstr.Trim(c.Description), maxLineChars, "\n"+prefix))
 		buffer.WriteString("\n")
 	}
-	buffer.WriteString("\n")
 
 	// Additional.
 	if c.Additional != "" {
 		lineStr := gstr.WordWrap(gstr.Trim(c.Additional), maxLineChars, "\n")
 		buffer.WriteString(lineStr)
+		buffer.WriteString("\n")
 	}
-	buffer.WriteString("\n")
+
 	fmt.Println(buffer.String())
 }
 
diff --git a/os/gcmd/gcmd_command_run.go b/os/gcmd/gcmd_command_run.go
index 0f412ad33..391cf3c15 100644
--- a/os/gcmd/gcmd_command_run.go
+++ b/os/gcmd/gcmd_command_run.go
@@ -10,6 +10,7 @@ package gcmd
 import (
 	"context"
 	"fmt"
+	"os"
 
 	"github.com/gogf/gf/v2/text/gstr"
 )
@@ -38,7 +39,11 @@ func (c *Command) Run(ctx context.Context) error {
 	}
 
 	// Print error and help command if no command found.
-	fmt.Printf("Error: command not found for \"%s\"\n\n", gstr.Join(args, " "))
+	fmt.Printf(
+		"ERROR: command \"%s\" not found for arguments \"%s\"\n",
+		gstr.Join(args, " "),
+		gstr.Join(os.Args, " "),
+	)
 	c.Print()
 
 	return nil
@@ -63,6 +68,7 @@ func (c *Command) doRun(ctx context.Context, parser *Parser) (err error) {
 	return c.Func(ctx, parser)
 }
 
+// reParse re-parses the arguments using option configuration of current command.
 func (c *Command) reParse(ctx context.Context, parser *Parser) (*Parser, error) {
 	// It seems just has built-in help option, it so does nothing.
 	if len(c.Options) == 1 {
@@ -83,6 +89,7 @@ func (c *Command) reParse(ctx context.Context, parser *Parser) (*Parser, error)
 	return Parse(supportedOptions)
 }
 
+// searchCommand recursively searches the command according given arguments.
 func (c *Command) searchCommand(args []string) *Command {
 	if len(args) == 0 {
 		return nil