t7421: eliminate 'grep' check in t7421.4 for mingw compatibility

The 'grep' check in test 4 of t7421 resulted in the failure of t7421 on Windows due to a different error message error: cannot spawn git: No such file or directory instead of fatal: exec 'rev-parse': cd to 'my-subm' failed: No such file or directory Tighten up the check to compute 'src_abbrev' by guarding the 'verify_submodule_committish()' call using `p->status !='D'`, so that the former isn't called in case of non-existent submodule directory, consequently, there is no such error message on any execution environment. The same need not be implemented for 'dst_abbrev' and is rather redundant since the conditional 'if (S_ISGITLINK(p->mod_dst))' already guards the 'verify_submodule_committish()' when we have a status of 'D'. Therefore, eliminate the 'grep' check in t7421. Instead, verify the absence of an error message by doing a 'test_must_be_empty' on the file containing the error. Reported-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Helped-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com> Mentored-by: Christian Couder <chriscool@tuxfamily.org> Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com> Signed-off-by: Shourya Shukla <shouryashukla.oo@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Shourya Shukla committed Aug 27, 2020 at 23:15 UTC d79b14556922e5b7139268e92f2dface8d174278

2 files changed +5 -4

builtin/submodule--helper.c

+4 -3

@@ -1035,7 +1035,7 @@ static void print_submodule_summary(struct summary_cb *info, char *errmsg,

1035 static void generate_submodule_summary(struct summary_cb *info,

1036 struct module_cb *p)

1037 {

1038 - char *displaypath, *src_abbrev, *dst_abbrev;

1038 + char *displaypath, *src_abbrev = NULL, *dst_abbrev;

1039 int missing_src = 0, missing_dst = 0;

1040 char *errmsg = NULL;

1041 int total_commits = -1;

@@ -1061,8 +1061,9 @@ static void generate_submodule_summary(struct summary_cb *info,

1061 }

1062

1063 if (S_ISGITLINK(p->mod_src)) {

1064 - src_abbrev = verify_submodule_committish(p->sm_path,

1065 - oid_to_hex(&p->oid_src));

1064 + if (p->status != 'D')

1065 + src_abbrev = verify_submodule_committish(p->sm_path,

1066 + oid_to_hex(&p->oid_src));

1067 if (!src_abbrev) {

1068 missing_src = 1;

1069 /*

t/t7421-submodule-summary-add.sh

+1 -1

@@ -58,7 +58,7 @@ test_expect_success 'submodule summary output for submodules with changed paths'

58 git commit -m "change submodule path" &&

59 rev=$(git -C sm rev-parse --short HEAD^) &&

60 git submodule summary HEAD^^ -- my-subm >actual 2>err &&

61 - grep "fatal:.*my-subm" err &&

61 + test_must_be_empty err &&

62 cat >expected <<-EOF &&

63 * my-subm ${rev}...0000000: