On Wed, Jan 03 2018, Adam Dinwoodie jotted:
> On Monday 25 December 2017 at 12:28 am +0000, Ævar Arnfjörð Bjarmason wrote:
>> There has never been any full roundtrip testing of what git-ls-files
>> and other functions that use wildmatch() actually do, rather we've
>> been satisfied with just testing the underlying C function.
>>
>> Due to git-ls-files and friends having their own codepaths before they
>> call wildmatch() there's sometimes differences in the behavior between
>> the two, and even when we test for those (as with
>> 9e4e8a64c2 ("pathspec: die on empty strings as pathspec", 2017-06-06))
>> there was no one place where you can review how these two modes
>> differ.
>>
>> Now there is. We now attempt to create a file called $haystack and
>> match $needle against it for each pair of $needle and $haystack that
>> we were passing to test-wildmatch.
>>
>> If we can't create the file we skip the test. This ensures that we can
>> run this on all platforms and not maintain some infinitely growing
>> whitelist of e.g. platforms that don't support certain characters in
>> filenames.
>>
>> As a result of doing this we can now see the cases where these two
>> ways of testing wildmatch differ:
>>
>> * Creating a file called 'a[]b' and running ls-files 'a[]b' will show
>> that file, but wildmatch("a[]b", "a[]b") will not match
>>
>> * wildmatch() won't match a file called \ against \, but ls-files
>> will.
>>
>> * `git --glob-pathspecs ls-files 'foo**'` will match a file
>> 'foo/bba/arr', but wildmatch won't, however pathmatch will.
>>
>> This seems like a bug to me, the two are otherwise equivalent as
>> these tests show.
>>
>> This also reveals the case discussed in 9e4e8a64c2 above, where '' is
>> now an error as far as ls-files is concerned, but wildmatch() itself
>> happily accepts it.
>>
>> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
>
> I'm seeing this test script failing on the pu branch as a result of this
> commit when building on Cygwin. Specifically, the test fails at
> 9d45e1ca4 ("Merge branch 'bw/oidmap-autoinit' into pu", 2017-12-28), and
> bisecting points the blame at 2ee0c785a ("wildmatch test: create & test
> files on disk in addition to in-memory", 2017-12-25).
>
> I've copied the verbose error output for the first error below, and
> uploaded the full output, including verbose and trace output for the
> unexpectedly failing tests, at [0]. (With 42 failures among 1512 tests,
> there's a lot of it, so I didn't want to include it in an email.)
Does the fixup above in <878tdm8k2d.fsf@xxxxxxxxxxxxxxxxxxx> work for
you, i.e. changing $10 in the script to ${10}?
I was waiting on Junio to see if he'd like to just squash that or if I
should re-send.
> expecting success:
> wildtest_file_setup &&
> printf '%s' '\' >expect &&
> git --glob-pathspecs ls-files -z -- '00' >actual.raw 2>actual.err &&
> wildtest_stdout_stderr_cmp
>
> ++ wildtest_file_setup
> ++ test_when_finished '
> rm -rf -- * &&
> git reset
> '
> ++ test 0 = 0
> ++ test_cleanup='{
> rm -rf -- * &&
> git reset
>
> } && (exit "$eval_ret"); eval_ret=$?; :'
> ++ git add -A
> ++ printf %s '\'
> ++ git --glob-pathspecs ls-files -z -- 00
> ++ wildtest_stdout_stderr_cmp
> ++ tr -d '\0'
> ++ test_cmp expect.err actual.err
> ++ diff -u expect.err actual.err
> ++ test_cmp expect actual
> ++ diff -u expect actual
> --- expect 2018-01-03 12:43:11.116611200 +0000
> +++ actual 2018-01-03 12:43:11.216180400 +0000
> @@ -1 +0,0 @@
> -\
> \ No newline at end of file
> + test_eval_ret_=1
> + want_trace
> + test t = t
> + test t = t
> + set +x
> error: last command exited with $?=1
> ++ rm -rf -- actual actual.err actual.raw expect expect.err
> ++ git reset
> ++ exit 1
> ++ eval_ret=1
> ++ :
> + test_eval_ret_=0
> + want_trace
> + test t = t
> + test t = t
> + set +x
> not ok 490 - wildmatch(ls): match '00' '\'
> #
> # wildtest_file_setup &&
> # printf '%s' '\' >expect &&
> # git --glob-pathspecs ls-files -z -- '00' >actual.raw 2>actual.err &&
> # wildtest_stdout_stderr_cmp
> #
>
> I'm digging into the failures myself now, but wanted to report the
> problem in the name of getting more eyes on it.
>
> Adam
>
> [0]: https://gist.github.com/me-and/04443bcb00e12436f0eacce079b56d02
