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67 lines
1.6 KiB
67 lines
1.6 KiB
// +build !windows forceposix
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package flags
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import (
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"strings"
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)
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const (
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defaultShortOptDelimiter = '-'
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defaultLongOptDelimiter = "--"
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defaultNameArgDelimiter = '='
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)
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func argumentStartsOption(arg string) bool {
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return len(arg) > 0 && arg[0] == '-'
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}
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func argumentIsOption(arg string) bool {
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if len(arg) > 1 && arg[0] == '-' && arg[1] != '-' {
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return true
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}
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if len(arg) > 2 && arg[0] == '-' && arg[1] == '-' && arg[2] != '-' {
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return true
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}
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return false
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}
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// stripOptionPrefix returns the option without the prefix and whether or
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// not the option is a long option or not.
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func stripOptionPrefix(optname string) (prefix string, name string, islong bool) {
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if strings.HasPrefix(optname, "--") {
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return "--", optname[2:], true
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} else if strings.HasPrefix(optname, "-") {
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return "-", optname[1:], false
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}
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return "", optname, false
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}
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// splitOption attempts to split the passed option into a name and an argument.
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// When there is no argument specified, nil will be returned for it.
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func splitOption(prefix string, option string, islong bool) (string, string, *string) {
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pos := strings.Index(option, "=")
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if (islong && pos >= 0) || (!islong && pos == 1) {
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rest := option[pos+1:]
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return option[:pos], "=", &rest
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}
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return option, "", nil
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}
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// addHelpGroup adds a new group that contains default help parameters.
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func (c *Command) addHelpGroup(showHelp func() error) *Group {
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var help struct {
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ShowHelp func() error `short:"h" long:"help" description:"Show this help message"`
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}
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help.ShowHelp = showHelp
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ret, _ := c.AddGroup("Help Options", "", &help)
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ret.isBuiltinHelp = true
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return ret
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}
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