Please support a feature to omit all help and messages

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Issue by joshtriplett
Sunday Nov 18, 2018 at 10:10 GMT
Originally opened as clap-rs/clap#1384

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For the purposes of reducing binary size, I'd love to have a new default feature flag for clap (that projects could then disable) that would omit generated --help and all friendly error/constraint messages, and minimize error reporting to just "Invalid arguments" or similar. That would help for embedded use cases that may want to reduce the sizes of binaries used in scripting, without regard to human invocations of those binaries.

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Comment by CreepySkeleton
Saturday Feb 01, 2020 at 15:28 GMT

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Related to #1485

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Comment by CreepySkeleton
Saturday Feb 01, 2020 at 15:37 GMT

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Closing in favor of #1365

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Comment by Dylan-DPC
Saturday Feb 01, 2020 at 15:41 GMT

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This may be a side effect of that but not directly related. Reopening

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Comment by Rua
Thursday Jan 21, 2021 at 14:34 GMT

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I would like this as well, but supported as a runtime option instead of a feature flag, so that it can be enabled or disabled on a case-by-case basis.

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Comment by ldm0
Thursday Jan 28, 2021 at 17:25 GMT

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I would like this as well, but supported as a runtime option instead of a feature flag, so that it can be enabled or disabled on a case-by-case basis.

@Rua This issue is mainly about reducing binary size. If you just wanna control the help message emission in the runtime, the right-now approach is using try_get_matches to get a result and control the output by yourself.

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Comment by pksunkara
Wednesday Jun 16, 2021 at 01:27 GMT

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Postponing this for later than 3.0 because we need design on how to divided the existing help, error messages, usage etc.. into separate feature flags.