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61 lines
1.4 KiB
61 lines
1.4 KiB
package cli
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import (
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"fmt"
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"github.com/xrash/smetrics"
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)
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func jaroWinkler(a, b string) float64 {
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// magic values are from https://github.com/xrash/smetrics/blob/039620a656736e6ad994090895784a7af15e0b80/jaro-winkler.go#L8
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const (
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boostThreshold = 0.7
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prefixSize = 4
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)
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return smetrics.JaroWinkler(a, b, boostThreshold, prefixSize)
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}
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func suggestFlag(flags []Flag, provided string, hideHelp bool) string {
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distance := 0.0
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suggestion := ""
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for _, flag := range flags {
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flagNames := flag.Names()
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if !hideHelp {
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flagNames = append(flagNames, HelpFlag.Names()...)
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}
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for _, name := range flagNames {
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newDistance := jaroWinkler(name, provided)
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if newDistance > distance {
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distance = newDistance
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suggestion = name
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}
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}
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}
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if len(suggestion) == 1 {
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suggestion = "-" + suggestion
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} else if len(suggestion) > 1 {
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suggestion = "--" + suggestion
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}
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return suggestion
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}
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// suggestCommand takes a list of commands and a provided string to suggest a
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// command name
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func suggestCommand(commands []*Command, provided string) (suggestion string) {
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distance := 0.0
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for _, command := range commands {
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for _, name := range append(command.Names(), helpName, helpAlias) {
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newDistance := jaroWinkler(name, provided)
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if newDistance > distance {
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distance = newDistance
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suggestion = name
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}
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}
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}
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return fmt.Sprintf(SuggestDidYouMeanTemplate, suggestion)
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}
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