Cam Hutchison
4ecb53599b
* fix: Check if negatable duplicates another flag
Add a check for flags with the `negatable` option if the negative flag
conflicts with another tag, such as:
Flag bool `negatable:""`
NoFlag bool
The flag `--no-flag` is ambiguous in this scenario.
* feat: Make negatable flag name customisable
Allow a value on the `negatable` tag to specify a flag name to use for
negation instead of using `--no-<flag-name>` as the flag.
e.g.
Approve bool `default:"true",negatable:"deny"`
This example will allow `--deny` to set the `Approve` field to false.
20 lines
563 B
Go
20 lines
563 B
Go
package kong
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// negatableDefault is a placeholder value for the Negatable tag to indicate
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// the negated flag is --no-<flag-name>. This is needed as at the time of
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// parsing a tag, the field's flag name is not yet known.
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const negatableDefault = "_"
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// negatableFlagName returns the name of the flag for a negatable field, or
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// an empty string if the field is not negatable.
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func negatableFlagName(name, negation string) string {
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switch negation {
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case "":
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return ""
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case negatableDefault:
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return "--no-" + name
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default:
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return "--" + negation
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}
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}
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