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From: Elijah Newren <newren@gmail.com>
To: Jeff King <peff@peff.net>
Cc: Elijah Newren via GitGitGadget <gitgitgadget@gmail.com>,
	Git Mailing List <git@vger.kernel.org>,
	Phillip Wood <phillip.wood123@gmail.com>,
	Taylor Blau <me@ttaylorr.com>
Subject: Re: [PATCH v2 1/3] test-lib: allow selecting tests by substring/regex with --run
Date: Wed, 14 Oct 2020 12:02:07 -0700
Message-ID: <CABPp-BHV4WGygzyw6RUsJqCGkvmc-f4dseFjbAG9hUvJgkYx+Q@mail.gmail.com> (raw)
In-Reply-To: <20201014180959.GC24279@coredump.intra.peff.net>

On Wed, Oct 14, 2020 at 11:09 AM Jeff King <peff@peff.net> wrote:
>
> On Wed, Oct 14, 2020 at 10:50:03AM -0700, Elijah Newren wrote:
>
> > > > @@ -819,9 +821,8 @@ match_test_selector_list () {
> > > >                       *)
> > > >                               if expr "z$selector" : "z[0-9]*[^0-9]" >/dev/null
> > > >                               then
> > > > -                                     echo "error: $title: invalid non-numeric in test" \
> > > > -                                             "selector: '$orig_selector'" >&2
> > > > -                                     exit 1
> > > > +                                     echo "$title" | grep -q "$selector" && return
> > > > +                                     continue
> > > >                               fi
> > >
> > > I like that you allow regexes. It's unfortunate that the skip-check
> > > costs us a process in every test. It may not be that big a deal since we
> > > only pay it if you use a non-numeric selector. But I wonder if there's
> > > any reason not to use "expr" here, as well.
> >
> > I originally used [[ $title =~ "$selector" ]] in order to avoid the
> > sub-shell...but that was bash-specific.  I briefly looked to see if
> > there was a shell portable way to handle regexes, wasn't having much
> > luck, and decided that this is only likely to arise when people are
> > passing --run and thus only running a single script and they avoid all
> > the subprocesses that would have been invoked inside the test, so it's
> > still a big net win overall.  Does expr handle regexes, portably?  Or
> > are you suggesting dropping the regex handling and limit it to
> > substring matching?  In either case, does using expr save us anything
> > (isn't expr a shell command)?
>
> There's an expr command doing a regex match in the diff context quoted
> above. :)

Oh, indeed.  How'd I miss that?

> I was wrong that it would save us a process, though. I thought it was a
> builtin in modern shells, but it doesn't appear to be in either dash or
> bash. So there's little reason to prefer it over grep here (switching to
> globs could be done with case and would save a process).

I guess it's at least slightly more consistent with the surrounding code.

Oh, and I found a bug in that my code was not handling negated
substrings correctly, e.g.
   ./test-script.sh --run="!rename"
would run all the tests instead of excluding the ones that had
"rename" as a substring.  So I'll send a reroll fixing that.

  reply index

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-12 23:26 [PATCH 0/3] Make test selection easier by specifying description substrings instead of just numeric counters Elijah Newren via GitGitGadget
2020-10-12 23:26 ` [PATCH 1/3] test-lib: allow selecting tests by substring/regex with --run Elijah Newren via GitGitGadget
2020-10-13 15:39   ` Taylor Blau
2020-10-13 17:23     ` Elijah Newren
2020-10-13 17:28       ` Taylor Blau
2020-10-13 18:21         ` Elijah Newren
2020-10-12 23:26 ` [PATCH 2/3] t6006, t6012: adjust tests to use 'setup' instead of synonyms Elijah Newren via GitGitGadget
2020-10-12 23:26 ` [PATCH 3/3] test-lib: reduce verbosity of skipped tests Elijah Newren via GitGitGadget
2020-10-13 15:44   ` Taylor Blau
2020-10-13 17:56     ` Elijah Newren
2020-10-13 19:27       ` Junio C Hamano
2020-10-13 13:08 ` [PATCH 0/3] Make test selection easier by specifying description substrings instead of just numeric counters Phillip Wood
2020-10-15 11:48   ` Johannes Schindelin
2020-10-15 13:42     ` Phillip Wood
2020-10-13 19:19 ` [PATCH v2 " Elijah Newren via GitGitGadget
2020-10-13 19:19   ` [PATCH v2 1/3] test-lib: allow selecting tests by substring/regex with --run Elijah Newren via GitGitGadget
2020-10-14 17:04     ` Jeff King
2020-10-14 17:46       ` Junio C Hamano
2020-10-14 18:07         ` Jeff King
2020-10-14 19:24           ` Junio C Hamano
2020-10-14 19:41             ` Elijah Newren
2020-10-14 19:49               ` Jeff King
2020-10-15 16:09                 ` Junio C Hamano
2020-10-15 15:59               ` Junio C Hamano
2020-10-14 17:50       ` Elijah Newren
2020-10-14 17:57         ` Junio C Hamano
2020-10-14 19:12           ` Elijah Newren
2020-10-15 16:10             ` Junio C Hamano
2020-10-14 18:09         ` Jeff King
2020-10-14 19:02           ` Elijah Newren [this message]
2020-10-15 16:20       ` Junio C Hamano
2020-10-15 19:46         ` Jeff King
2020-10-15 20:08           ` Junio C Hamano
2020-10-16  0:38             ` Jeff King
2020-10-16 16:16               ` Junio C Hamano
2020-10-16 16:30                 ` Junio C Hamano
2020-10-16 20:06                 ` Jeff King
2020-10-16 20:22                   ` Junio C Hamano
2020-10-13 19:19   ` [PATCH v2 2/3] t6006, t6012: adjust tests to use 'setup' instead of synonyms Elijah Newren via GitGitGadget
2020-10-13 19:19   ` [PATCH v2 3/3] test-lib: reduce verbosity of skipped tests Elijah Newren via GitGitGadget
2020-10-14 16:53     ` Jeff King
2020-10-14 17:39       ` Elijah Newren
2020-10-14 17:55         ` Jeff King
2020-10-14 17:57           ` Elijah Newren
2020-10-13 19:49   ` [PATCH v2 0/3] Make test selection easier by specifying description substrings instead of just numeric counters Taylor Blau
2020-10-14 21:13   ` [PATCH v3 " Elijah Newren via GitGitGadget
2020-10-14 21:13     ` [PATCH v3 1/3] test-lib: allow selecting tests by substring/glob with --run Elijah Newren via GitGitGadget
2020-10-16 11:40       ` Phillip Wood
2020-10-16 17:27         ` Elijah Newren
2020-10-16 18:24           ` Phillip Wood
2020-10-16 20:02           ` Junio C Hamano
2020-10-16 20:07             ` Jeff King
2020-10-14 21:13     ` [PATCH v3 2/3] t6006, t6012: adjust tests to use 'setup' instead of synonyms Elijah Newren via GitGitGadget
2020-10-14 21:13     ` [PATCH v3 3/3] test-lib: reduce verbosity of skipped tests Elijah Newren via GitGitGadget
2020-10-15 19:48     ` [PATCH v3 0/3] Make test selection easier by specifying description substrings instead of just numeric counters Jeff King
2020-10-16 19:28     ` [PATCH v4 " Elijah Newren via GitGitGadget
2020-10-16 19:28       ` [PATCH v4 1/3] test-lib: allow selecting tests by substring/glob with --run Elijah Newren via GitGitGadget
2020-10-16 19:28       ` [PATCH v4 2/3] t6006, t6012: adjust tests to use 'setup' instead of synonyms Elijah Newren via GitGitGadget
2020-10-16 19:28       ` [PATCH v4 3/3] test-lib: reduce verbosity of skipped tests Elijah Newren via GitGitGadget
2020-10-16 20:25       ` [PATCH v4 0/3] Make test selection easier by specifying description substrings instead of just numeric counters Junio C Hamano
2020-10-16 20:56         ` Elijah Newren
2020-10-16 22:50       ` [PATCH v5 " Elijah Newren via GitGitGadget
2020-10-16 22:50         ` [PATCH v5 1/3] test-lib: allow selecting tests by substring/glob with --run Elijah Newren via GitGitGadget
2020-10-16 23:25           ` Andrei Rybak
2020-10-17 23:43             ` Elijah Newren
2020-10-16 22:50         ` [PATCH v5 2/3] t6006, t6012: adjust tests to use 'setup' instead of synonyms Elijah Newren via GitGitGadget
2020-10-16 22:50         ` [PATCH v5 3/3] test-lib: reduce verbosity of skipped tests Elijah Newren via GitGitGadget
2020-10-18  0:23         ` [PATCH v6 0/3] Make test selection easier by specifying description substrings instead of just numeric counters Elijah Newren via GitGitGadget
2020-10-18  0:23           ` [PATCH v6 1/3] test-lib: allow selecting tests by substring/glob with --run Elijah Newren via GitGitGadget
2020-10-18  0:23           ` [PATCH v6 2/3] t6006, t6012: adjust tests to use 'setup' instead of synonyms Elijah Newren via GitGitGadget
2020-10-18  0:23           ` [PATCH v6 3/3] test-lib: reduce verbosity of skipped tests Elijah Newren via GitGitGadget

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