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From "Marco Massenzio" <ma...@mesosphere.io>
Subject Re: Review Request 34193: Refactored common functionality into FlagsBase
Date Thu, 28 May 2015 22:33:49 GMT


> On May 28, 2015, 11:45 a.m., Benjamin Hindman wrote:
> > 3rdparty/libprocess/3rdparty/stout/tests/flags_tests.cpp, line 517
> > <https://reviews.apache.org/r/34193/diff/5/?file=972154#file972154line517>
> >
> >     This looks like a duplicated test with the 'Usage' test above?

great catch!
modified to test with a derived class that alters the program name not to be picked from argv[0]


- Marco


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On May 26, 2015, 8:47 p.m., Marco Massenzio wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/34193/
> -----------------------------------------------------------
> 
> (Updated May 26, 2015, 8:47 p.m.)
> 
> 
> Review request for mesos, Benjamin Hindman and Joris Van Remoortere.
> 
> 
> Bugs: MESOS-2711
>     https://issues.apache.org/jira/browse/MESOS-2711
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Jira: MESOS-2711
> 
> Every program that uses stout's `FlagsBase` ends up
> re-implementing the `printUsage()` function, and adding
> a `bool help` (and associated --help flag); this functionality
> has now been refactored in the base class and is available everywhere.
> 
> This change attempts to be backward-compatible, so it
> does not alter the behavior of the program when --help is
> invoked (by, eg, automatically printing usage and exiting)
> but leaves up to the caller to check for `flags.help` and then
> decide what action to take.
> 
> There is now a default behavior for the "leader" ("Usage: <prog name> [options]")
> but the client API allows to modify that too.
> 
> Note - anywhere I found the use of the `--help` flag the behavior was the same: 
> print usage and exit (see also https://reviews.apache.org/r/34195).
> 
> 
> Diffs
> -----
> 
>   3rdparty/libprocess/3rdparty/stout/include/stout/flags/flags.hpp fb383b463a99924483634eebf22bf34de318f920

>   3rdparty/libprocess/3rdparty/stout/tests/flags_tests.cpp 00281195b53d2597bdb46e3fe6cd9d46a5e9b1f1

> 
> Diff: https://reviews.apache.org/r/34193/diff/
> 
> 
> Testing
> -------
> 
> make check
> 
> **NOTE** this change by itself breaks the build, because the --help is redefined everywhere
(16 places, as of last count): CL 34195 fixes that and makes all build/tests pass.
> 
> 
> Thanks,
> 
> Marco Massenzio
> 
>


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