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flag: PrintDefaults claims configurability, but doesn't say how #15024

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dsymonds opened this issue Mar 30, 2016 · 4 comments
Closed

flag: PrintDefaults claims configurability, but doesn't say how #15024

dsymonds opened this issue Mar 30, 2016 · 4 comments
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Documentation FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
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Unplanned

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@dsymonds
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https://golang.org/pkg/flag/#PrintDefaults says

PrintDefaults prints, to standard error unless configured otherwise, ...

I couldn't see anywhere how to send its output anywhere else.

I dug through the source code and eventually made my way to (*FlagSet).SetOutput, but that was not at all obvious.
@dsymonds
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Also, it'd be nice if one could print the output to an io.Writer without having to mess with the global configuration. I couldn't see how to do that either.

@bradfitz bradfitz added this to the Unplanned milestone Apr 7, 2016
@gopherbot
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CL https://golang.org/cl/28488 mentions this issue.

@ALTree ALTree added the NeedsFix The path to resolution is known, but the work has not been done. label Jul 18, 2017
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Change https://golang.org/cl/85816 mentions this issue: flag: remove confusing text from PrintDefaults functions regarding output

@gopherbot
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Change https://golang.org/cl/145203 mentions this issue: flag: improve docs for PrintDefaults; clarify how to change output destination

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@bradfitz @dsymonds @ALTree @gopherbot