英文:
How to specify "usage" for cli arguments (not flags)
问题
对于标志(flags),我可以指定在--help命令中显示的描述信息。
flag.String("a", "", "这是一个标志")
但是我没有标志,只有参数,我像这样使用命令行界面(CLI):
mycommand start 4
是否可以使用--help来查看“start”(和其他)参数的描述信息?
英文:
For flags I can specify description which appers in --help command
flag.String("a", "", "Is is a flag")
But I don't have flags, only arguments, I use cli like this
mycommand start 4
Is it possible use --help to see description to "start" (and other) arguments?
答案1
得分: 1
由于这不是直接由标志支持的功能,我只知道alecthomas/kong
包含参数用法:
package main
import "github.com/alecthomas/kong"
var CLI struct {
Rm struct {
Force bool `help:"强制删除。"`
Recursive bool `help:"递归删除文件。"`
Paths []string `arg:"" name:"path" help:"要删除的路径。" type:"path"`
} `cmd:"" help:"删除文件。"`
Ls struct {
Paths []string `arg:"" optional:"" name:"path" help:"要列出的路径。" type:"path"`
} `cmd:"" help:"列出路径。"`
}
func main() {
ctx := kong.Parse(&CLI)
switch ctx.Command() {
case "rm <path>":
case "ls":
default:
panic(ctx.Command())
}
}
使用shell --help rm
将得到以下结果:
$ shell --help rm
usage: shell rm <paths> ...
删除文件。
参数:
<paths> ... 要删除的路径。 <====== "usage" for cli arguments (not flags)!
标志:
--debug 调试模式。
-f, --force 强制删除。
-r, --recursive 递归删除文件。
英文:
Since this is not directly supported by flags, I know only of alecthomas/kong
which does include argument usage:
package main
import "github.com/alecthomas/kong"
var CLI struct {
Rm struct {
Force bool `help:"Force removal."`
Recursive bool `help:"Recursively remove files."`
Paths []string `arg:"" name:"path" help:"Paths to remove." type:"path"`
} `cmd:"" help:"Remove files."`
Ls struct {
Paths []string `arg:"" optional:"" name:"path" help:"Paths to list." type:"path"`
} `cmd:"" help:"List paths."`
}
func main() {
ctx := kong.Parse(&CLI)
switch ctx.Command() {
case "rm <path>":
case "ls":
default:
panic(ctx.Command())
}
}
You will get with shell --help rm
:
$ shell --help rm
usage: shell rm <paths> ...
Remove files.
Arguments:
<paths> ... Paths to remove. <====== "usage" for cli arguments (not flags)!
Flags:
--debug Debug mode.
-f, --force Force removal.
-r, --recursive Recursively remove files.
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