Re: v2.25.0-rc0 test failure on cygwin

>
>
> I noticed on Friday, while testing the v2.25.0-rc0 build, that test t6137
> failed on cygwin:
>
>   $ tail test-out-2-50-rc0
>   Test Summary Report
>   -------------------
>   t6137-pathspec-wildcards-literal.sh              (Wstat: 256 (exited 1) Tests: 25 Failed: 11)
>     Failed tests:  2, 7, 9, 11, 14-15, 17, 19, 21, 23, 25
>     Non-zero exit status: 1
>   Files=1023, Tests=30946, 21783 wallclock secs (19.08 usr 42.17 sys + 4031.65 cusr 12965.78 csys = 17058.68 CPU)
>   Result: FAIL
>   make[1]: *** [Makefile:78: prove] Error 1
>   make[1]: Leaving directory '/home/ramsay/git/t'
>   make: *** [Makefile:3286: test] Error 2
>   $
>
> A quick squint at the failing tests made it clear that the failure was
> caused by the cygwin build treating a quoted glob character sequence
> (e.g. '\*') as a directory separator char followed by a glob character.
>
> To show this, I quickly hacked up a patch which causes the test to pass:
>
>
>   diff --git a/abspath.h b/abspath.h
>   index 4653080d5e..a5e30a3033 100644
>   --- a/abspath.h
>   +++ b/abspath.h
>   @@ -27,7 +27,7 @@ char *prefix_filename_except_for_dash(const char *prefix, const char *path);
>
>    static inline int is_absolute_path(const char *path)
>    {
>   -     return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
>   +     return /*is_dir_sep(path[0])*/ path[0] == '/' || has_dos_drive_prefix(path);
>    }
>
>    /**
>   diff --git a/path.c b/path.c
>   index 3b598b2847..f000b9ffff 100644
>   --- a/path.c
>   +++ b/path.c
>   @@ -1223,13 +1223,15 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
>         end = src + offset_1st_component(src);
>         while (src < end) {
>                 char c = *src++;
>   +#ifdef DUMMY
>                 if (is_dir_sep(c))
>                         c = '/';
>   +#endif
>                 *dst++ = c;
>         }
>         dst0 = dst;
>
>   -     while (is_dir_sep(*src))
>   +     while (/*is_dir_sep(*src)*/ *src == '/')
>                 src++;
>
>         for (;;) {
>   @@ -1247,10 +1249,10 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
>                         if (!src[1]) {
>                                 /* (1) */
>                                 src++;
>   -                     } else if (is_dir_sep(src[1])) {
>   +                     } else if (/*is_dir_sep(src[1])*/ src[1] == '/') {
>                                 /* (2) */
>                                 src += 2;
>   -                             while (is_dir_sep(*src))
>   +                             while (/*is_dir_sep(*src)*/ *src == '/')
>                                         src++;
>                                 continue;
>                         } else if (src[1] == '.') {
>   @@ -1258,10 +1260,10 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
>                                         /* (3) */
>                                         src += 2;
>                                         goto up_one;
>   -                             } else if (is_dir_sep(src[2])) {
>   +                             } else if (/*is_dir_sep(src[2])*/ src[2] == '/') {
>                                         /* (4) */
>                                         src += 3;
>   -                                     while (is_dir_sep(*src))
>   +                                     while (/*is_dir_sep(*src)*/ *src == '/')
>                                                 src++;
>                                         goto up_one;
>                                 }
>   @@ -1269,11 +1271,11 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
>                 }
>
>                 /* copy up to the next '/', and eat all '/' */
>   -             while ((c = *src++) != '\0' && !is_dir_sep(c))
>   +             while ((c = *src++) != '\0' && !(/*is_dir_sep(c)*/ c == '/'))
>                         *dst++ = c;
>   -             if (is_dir_sep(c)) {
>   +             if (/*is_dir_sep(c)*/ c == '/') {
>                         *dst++ = '/';
>   -                     while (is_dir_sep(c))
>   +                     while (/*is_dir_sep(c)*/ c == '/')
>                                 c = *src++;
>                         src--;
>                 } else if (!c)
>

> In other words, in 'is_absolute_path()' and 'normalize_path_copy_len()', then
> just disable the '\' character as a path separator! ;)
>
> This was just to demonstrate the problem, not a serious patch, of course!
>
> I was away for the weekend and was expecting to see a patch to fix this
> on Gfw when I got back, but to my surprise there has been no mention of
> it on the mailing list (having now waded through the backlog!).
>
> To be clear, I can not imagine that this test passes on Gfw. However, this
> should have been failing the windows CI for ages, so ... perhaps I don't
> have a sufficiently vivid imagination. :)
>
> Anyway, the patch below 'fixes' the issue on cygwin.
>
> Thanks.
>
> ATB,
> Ramsay Jones
>
>
> ---- >8 ----
> From: Ramsay Jones <ramsay@ramsayjones.plus.com>
> Date: Mon, 2 Jun 2025 22:51:33 +0100
> Subject: [PATCH] t6137: disable 'quoted glob' pathspecs on cygwin
>
> The backslash in a 'quoted glob' character is treated as a directory
> separator character on cygwin, which causes all such tests to fail.
> Skip all such tests on cygwin using the !CYGWIN prerequisite. While
> here, fix a few test titles as well.
>
> Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
> ---
>  t/t6137-pathspec-wildcards-literal.sh | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/t/t6137-pathspec-wildcards-literal.sh b/t/t6137-pathspec-wildcards-literal.sh
> index 20abad5667..229e48282e 100755
> --- a/t/t6137-pathspec-wildcards-literal.sh
> +++ b/t/t6137-pathspec-wildcards-literal.sh
> @@ -39,7 +39,7 @@ test_expect_success 'add wildcard *' '
>         )
>  '
>
> -test_expect_success 'add literal \*' '
> +test_expect_success !CYGWIN 'add literal \*' '
>         git init test-asterisk-literal &&
>         (
>                 cd test-asterisk-literal &&
> @@ -125,7 +125,7 @@ test_expect_success 'add wildcard f*' '
>         )
>  '
>
> -test_expect_success 'add literal f\*' '
> +test_expect_success !CYGWIN 'add literal f\*' '
>         git init test-f-lit &&
>         (
>                 cd test-f-lit &&
> @@ -156,7 +156,7 @@ test_expect_success 'add wildcard f**' '
>         )
>  '
>
> -test_expect_success 'add literal f\*\*' '
> +test_expect_success !CYGWIN 'add literal f\*\*' '
>         git init test-fdstar-lit &&
>         (
>                 cd test-fdstar-lit &&
> @@ -184,7 +184,7 @@ test_expect_success 'add wildcard f?z' '
>         )
>  '
>
> -test_expect_success 'add literal \? literal' '
> +test_expect_success !CYGWIN 'add literal \? literal' '
>         git init test-q-lit &&
>         (
>                 cd test-q-lit &&
> @@ -227,7 +227,7 @@ test_expect_success 'add wildcard hello?world' '
>         )
>  '
>
> -test_expect_success 'add literal hello\?world' '
> +test_expect_success !CYGWIN 'add literal hello\?world' '
>         git init test-hellolit &&
>         (
>                 cd test-hellolit &&
> @@ -241,7 +241,7 @@ test_expect_success 'add literal hello\?world' '
>         )
>  '
>
> -test_expect_success 'add literal [abc]' '
> +test_expect_success !CYGWIN 'add literal \[abc\]' '
>         git init test-brackets-lit &&
>         (
>                 cd test-brackets-lit &&
> @@ -280,7 +280,7 @@ test_expect_success 'commit: wildcard *' '
>         )
>  '
>
> -test_expect_success 'commit: literal *' '
> +test_expect_success !CYGWIN 'commit: literal \*' '
>         git init test-c-asterisk-lit &&
>         (
>                 cd test-c-asterisk-lit &&
> @@ -313,7 +313,7 @@ test_expect_success 'commit: wildcard f*' '
>         )
>  '
>
> -test_expect_success 'commit: literal f\*' '
> +test_expect_success !CYGWIN 'commit: literal f\*' '
>         git init test-c-flit &&
>         (
>                 cd test-c-flit &&
> @@ -328,7 +328,7 @@ test_expect_success 'commit: literal f\*' '
>         )
>  '
>
> -test_expect_success 'commit: wildcard pathspec limits commit' '
> +test_expect_success 'commit: wildcard f**' '
>         git init test-c-pathlimit &&
>         (
>                 cd test-c-pathlimit &&
> @@ -346,7 +346,7 @@ test_expect_success 'commit: wildcard pathspec limits commit' '
>         )
>  '
>
> -test_expect_success 'commit: literal f\*\*' '
> +test_expect_success !CYGWIN 'commit: literal f\*\*' '
>         git init test-c-fdstar-lit &&
>         (
>                 cd test-c-fdstar-lit &&
> @@ -379,7 +379,7 @@ test_expect_success 'commit: wildcard ?' '
>         )
>  '
>
> -test_expect_success 'commit: literal \?' '
> +test_expect_success !CYGWIN 'commit: literal \?' '
>         git init test-c-qlit &&
>         (
>                 cd test-c-qlit &&
> @@ -411,7 +411,7 @@ test_expect_success 'commit: wildcard hello?world' '
>         )
>  '
>
> -test_expect_success 'commit: literal hello\?world' '
> +test_expect_success !CYGWIN 'commit: literal hello\?world' '
>         git init test-c-hellolit &&
>         (
>                 cd test-c-hellolit &&
> --
> 2.49.0