Re: [PATCH] fstests: reduce runtime of check -n

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On Wed, 21 Jun 2023 15:09:35 +0300, Amir Goldstein wrote:

> On Wed, Jun 21, 2023 at 12:24 PM David Disseldorp <ddiss@xxxxxxx> wrote:
...
> > > Actually I'm not sure what's this line for. We get $list by "cd $SRC_DIR; echo $1",
> > > is there any chance to have "$SRC_DIR" in $t (or $test_dir) ?  
> >
> > Indeed, this line can be dropped. One minor change in behaviour here is
> > that a test pattern with a wacky path prefix e.g. ../tests/xfs/00? will
> > no longer work. I think breaking such patterns is okay, but it could
> > also be resolved by more carefully extracting the last two path
> > components.
> >  
> 
> I didn't want to drop it because I didn't want to change legacy behavior.
> When user's cwd is fstests root directory, it may be natural for some
> users to use bash auto completion to run the command
> ./check tests/generic/001
> 
> so there may well be users out these that pass test names including
> the tests/ prefix and check has always trimmed this prefix.

Ah, yes, understood.

> There is something a bit confusing about expanding of bash
> patterns:
> 
> When the user uses this syntax:
> ./check tests/generic/00?
> 
> the shell expands that pattern to a list of 9 arguments passed to
> ./check tests/generic/001  tests/generic/002 ...
> 
> But when the user uses the documented syntax:
> ./check generic/00?
> check gets a single argument and $(cd $SRC_DIR; echo $1)
> expands this single argument to a list
> 
> All the above is existing behavior which my patch should
> not have changed.

The example I gave was "../tests/xfs/00?", which does get broken by this
change. It's relative to SRC_DIR and independent of check parameter
expansion. As mentioned, I think it's obscure enough usage that this
breakage shouldn't be worth bothering about.

Cheers, David




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