Hi, everyone,
I have create a package named cmdline to extend std.flag based on Go
src v1.7
Then, we can make a command usage page more easily and with enough
information.
So, I wonder if the Go authors can merge this change into std.flag, to
help gophers make a command line page more conveniently?
You can find the project here: http://github.com/vipally/cmdline
This is the main change:
1. Add LogicName and Required field for every flag, and modify the flag
define interface
2. Add Summary and Details for command line info
3. Add interface GetUsage() string
4. Modify the Parse() logic
//usage of cmdline as follow
import (
"github.com/vipally/cmdline"
)
func main() {
cmdline.Summary("command copy is used to copy a file to another path.")
cmdline.Details(`Command copy is used to copy a file to another path.
If the destnation file is exist, default ask for if will cover it.
If flag -y used, it will cover the destnation file without ask.
If flag -n used, it will not cover the destnation file without ask.
`)
cmdline.String("s", "src", ".", true, "source file path")
cmdline.String("d", "dst", ".", true, "destnation file path")
cmdline.Bool("c", "cover", false, false, "if cover the destnation file")
cmdline.Bool("y", "yes", false, false, "if auto select yes when ask for
cover")
cmdline.Bool("n", "no", false, false, "if auto select no when ask for
cover")
cmdline.Parse()
//[error] require but lack of flag -s=<src>
//Usage of [copy.exe]:
// Summary:
// command copy is used to copy a file to another path
//
// Usage:
// copy.exe [-c=<cover>] -d=<dst> [-n=<no>] -s=<src> [-y=<yes>]
// -c=<cover>
// if cover the destnation file
// -d=<dst> required string (default ".")
// destination file path
// -n=<no> if auto select no when ask for cover
// -s=<src> required string (default ".")
// source file path
// -y=<yes>
// if auto select yes when ask for cover
//
// Details:
// Command copy is used to copy a file to another path.
// If the destnation file is exist, default ask for if will cover it.
// If flag -y used, it will cover the destnation file without ask.
// If flag -n used, it will not cover the destnation file without ask.
}
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