/usr/share/gocode/src/github.com/svent/go-flags/optstyle_windows.go is in golang-github-svent-go-flags-dev 1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import (
"strings"
)
// Windows uses a front slash for both short and long options. Also it uses
// a colon for name/argument delimter.
const (
defaultShortOptDelimiter = '/'
defaultLongOptDelimiter = "/"
defaultNameArgDelimiter = ':'
)
func argumentIsOption(arg string) bool {
// Windows-style options allow front slash for the option
// delimiter.
return len(arg) > 0 && (arg[0] == '-' || arg[0] == '/')
}
// stripOptionPrefix returns the option without the prefix and whether or
// not the option is a long option or not.
func stripOptionPrefix(optname string) (string, bool) {
// Determine if the argument is a long option or not. Windows
// typically supports both long and short options with a single
// front slash as the option delimiter, so handle this situation
// nicely.
if strings.HasPrefix(optname, "--") {
return optname[2:], true
} else if strings.HasPrefix(optname, "-") {
return optname[1:], false
} else if strings.HasPrefix(optname, "/") {
optname = optname[1:]
if len(optname) > 1 {
return optname, true
}
return optname, false
}
return optname, false
}
// splitOption attempts to split the passed option into a name and an argument.
// When there is no argument specified, nil will be returned for it.
func splitOption(option string) (string, *string) {
if len(option) == 0 {
return option, nil
}
// Windows typically uses a colon for the option name and argument
// delimiter while POSIX typically uses an equals. Support both styles,
// but don't allow the two to be mixed. That is to say /foo:bar and
// --foo=bar are acceptable, but /foo=bar and --foo:bar are not.
var pos int
if option[0] == '/' {
pos = strings.Index(option, ":")
} else if option[0] == '-' {
pos = strings.Index(option, "=")
}
if pos >= 0 {
rest := option[pos+1:]
return option[:pos], &rest
}
return option, nil
}
// newHelpGroup returns a new group that contains default help parameters.
func newHelpGroup(showHelp func() error) *Group {
// Windows CLI applications typically use /? for help, so make both
// that available as well as the POSIX style h and help.
var help struct {
ShowHelp func() error `short:"?" description:"Show this help message"`
ShowHelp2 func() error `short:"h" long:"help" description:"Show this help message"`
}
help.ShowHelp = showHelp
help.ShowHelp2 = showHelp
return NewGroup("Help Options", &help)
}
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