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MarkDeprecated and NormalizeFunc as alias results in an inconsistent deprecation message #279
Description
cmd.Flags().StringVar(&src, "dir", "", "deprecated, use src")
cmd.Flags().MarkDeprecated("dir", "dir has been renamed src")
cmd.Flags().StringVar(&src, "src", "", "src directory or file")
cmd.Flags().SetNormalizeFunc(aliasNormalizeFunc)
$ go run . --dir=test
Flag --src has been deprecated, dir has been renamed src
Activity
tomasaschan commentedon Jul 16, 2025
This issue has not been updated in a long time. Is it still relevant?
(If I receive no answer before the end of the summer, I'll close it. Feel free to re-open if you come here after that happens and it is relevant to you - but if you do, please also comment and specify what outcome you're interested in!)
hdimer commentedon Jul 30, 2026
Still reproduces on main. With an alias set up via
SetNormalizeFunc, using the alias for a deprecated flag reports the canonical name instead of the one you typed:Parsepasses the normalizedflag.NameintoSet, so the typed name is lost before the message is built. Outcome I'd want: report the flag as typed,Flag --dir has been deprecated, .... Opened #500 with a small fix.fix: report the flag name as typed in deprecation warnings