Fix missing required flag error uses flag name and not alias #1709
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skelouse
approved these changes
Mar 20, 2023
dearchap
reviewed
Mar 21, 2023
| for _, key := range f.Names() { | ||
| flagName = key | ||
| flagNames := f.Names() | ||
| flagName = flagNames[0] |
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what happens if someone passes in a flag with no name or aliases defined ? Will the slice be nil ?
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It returns an empty slice (length 0) slice with empty string (length 1), not a nil. I can make a test case for it to prove that it doesn't panic if you want, even though the code doesn't handle this kind of flag nicely (showing as a newline in the help).
What would a flag without a name or alias means to the user? Shouldn't the code have a different check and error for this case?
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if len(flagNames) == 0 ln 208 will panic:
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@skelouse it's length 1 with an empty string. Sorry for the confusion. https://go.dev/play/p/tsnBea9RKk4 - No panic
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Both examples provided are illustrative but its better to add a simple test case for this. Just have a flag without a name and see what happens. If everything works well and good.
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skelouse
approved these changes
Mar 27, 2023
dearchap
approved these changes
Mar 28, 2023
mauromorales
referenced
this pull request
in kairos-io/provider-kairos
May 3, 2023
[](https://renovatebot.com) This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [github.com/urfave/cli/v2](https://togithub.com/urfave/cli) | require | patch | `v2.25.1` -> `v2.25.3` | --- ### Release Notes <details> <summary>urfave/cli</summary> ### [`v2.25.3`](https://togithub.com/urfave/cli/releases/tag/v2.25.3) [Compare Source](https://togithub.com/urfave/cli/compare/v2.25.2...v2.25.3) #### What's Changed - Fix `incorrectTypeForFlagError` for unknowns by [@​danhunsaker](https://togithub.com/danhunsaker) in [https://github.com/urfave/cli/pull/1708](https://togithub.com/urfave/cli/pull/1708) #### New Contributors - [@​danhunsaker](https://togithub.com/danhunsaker) made their first contribution in [https://github.com/urfave/cli/pull/1708](https://togithub.com/urfave/cli/pull/1708) **Full Changelog**: urfave/cli@v2.25.2...v2.25.3 ### [`v2.25.2`](https://togithub.com/urfave/cli/releases/tag/v2.25.2) [Compare Source](https://togithub.com/urfave/cli/compare/v2.25.1...v2.25.2) #### What's Changed - Fix missing required flag error uses flag name and not alias by [@​nirhaas](https://togithub.com/nirhaas) in [https://github.com/urfave/cli/pull/1709](https://togithub.com/urfave/cli/pull/1709) - Remove redundant variable declarations by [@​huiyifyj](https://togithub.com/huiyifyj) in [https://github.com/urfave/cli/pull/1714](https://togithub.com/urfave/cli/pull/1714) - Fix:(issue 1689) Match markdown output with help output by [@​dearchap](https://togithub.com/dearchap) in [https://github.com/urfave/cli/pull/1723](https://togithub.com/urfave/cli/pull/1723) #### New Contributors - [@​nirhaas](https://togithub.com/nirhaas) made their first contribution in [https://github.com/urfave/cli/pull/1709](https://togithub.com/urfave/cli/pull/1709) - [@​huiyifyj](https://togithub.com/huiyifyj) made their first contribution in [https://github.com/urfave/cli/pull/1714](https://togithub.com/urfave/cli/pull/1714) **Full Changelog**: urfave/cli@v2.25.1...v2.25.2 </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). View repository job log [here](https://app.renovatebot.com/dashboard#github/kairos-io/provider-kairos). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNS42Ni4xIiwidXBkYXRlZEluVmVyIjoiMzUuNjYuMSIsInRhcmdldEJyYW5jaCI6Im1haW4ifQ==--> Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
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What type of PR is this?
What this PR does / why we need it:
Up until now, the missing required flag error showed the last alias of a flag, instead of the actual flag name. This results in a relatively unclear error messages:
Instead of
Which issue(s) this PR fixes:
Fixes #1701
Testing
Added test case to ensure this change works as expected.
Release Notes