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flag: document that Usage implementations may os.Exit #21671

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rsc opened this issue Aug 28, 2017 · 1 comment
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flag: document that Usage implementations may os.Exit #21671

rsc opened this issue Aug 28, 2017 · 1 comment
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Go1.10

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@rsc
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rsc commented Aug 28, 2017

We should document that a flag.Usage implementation is allowed to call os.Exit. See #21540 for related discussion.
@rsc rsc added this to the Go1.10 milestone Aug 28, 2017
@rsc rsc mentioned this issue Aug 28, 2017
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@dominikh dominikh mentioned this issue Aug 28, 2017
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@robpike robpike self-assigned this Aug 28, 2017
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Change https://golang.org/cl/59792 mentions this issue: flag: document that custom usage functions are free to call os.Exit

dominikh added a commit to dominikh/go-tools that referenced this issue Sep 4, 2017
@dominikh
staticcheck: remove CheckFlagUsage (SA1022)
d3d0ff0 
The Go team clarified that calling os.Exit in usage functions is
perfectly fine. See the following links for further information:

- rsc/getopt@9e2cef2#commitcomment-23601620

- golang/go#21540 (comment)

- golang/go#21671

Closes gh-159
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@rsc rsc unassigned robpike Jun 23, 2022
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