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[PATCH 14/16] ref-filter: stop setting FILTER_REFS_INCLUDE_BROKEN

From
Jeff King <peff@peff.net>
Date
Sep 24, 2021, 18:48 UTC
Message-ID
<YU4dZZ7P34/kSduu@coredump.intra.peff.net>
In-Reply-To
<YU4ZOF9+ubmoItmK@coredump.intra.peff.net>

Of the ref-filter callers, for-each-ref and git-branch both set the INCLUDE_BROKEN flag (but git-tag does not, which is a weird inconsistency). But now that GIT_REF_PARANOIA is on by default, that produces almost the same outcome for all three.

The one exception is that GIT_REF_PARANOIA will omit dangling symrefs. That's a better behavior for these tools, as they would never include such a symref in the main output anyway (they can't, as it doesn't point to an object). Instead they issue a warning to stderr. But that warning is somewhat useless; a dangling symref is a perfectly reasonable thing to have in your repository, and is not a sign of corruption. It's much friendlier to just quietly ignore it.

And in terms of robustness, the warning gains us little. It does not impact the exit code of either tool. So while the warning _might_ clue in a user that they have an unexpected broken symref, it would not help any kind of scripted use.

This patch converts for-each-ref and git-branch to stop using the INCLUDE_BROKEN flag. That gives them more reasonable behavior, and harmonizes them with git-tag.

We have to change one test to adapt to the situation. t1430 tries to trigger all of the REF_ISBROKEN behaviors from the underlying ref code. It uses for-each-ref to do so (because there isn't any other mechanism). That will no longer issue a warning about the symref which points to an invalid name, as it's considered dangling (and we can instead be sure that it's _not_ mentioned on stderr). Note that we do still complain about the illegally named "broken..symref"; its problem is not that it's dangling, but the name of the symref itself is illegal.

Signed-off-by: Jeff King <peff@peff.net>
---
 builtin/branch.c        | 2 +-
 builtin/for-each-ref.c  | 2 +-
 t/t1430-bad-ref-name.sh | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/builtin/branch.c b/builtin/branch.c
index 03c7b7253a..0b7ed82654 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -427,7 +427,7 @@ static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sortin
 
 	memset(&array, 0, sizeof(array));
 
-	filter_refs(&array, filter, filter->kind | FILTER_REFS_INCLUDE_BROKEN);
+	filter_refs(&array, filter, filter->kind);
 
 	if (filter->verbose)
 		maxwidth = calc_maxwidth(&array, strlen(remote_prefix));
diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 89cb6307d4..642b4b888f 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -77,7 +77,7 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 
 	filter.name_patterns = argv;
 	filter.match_as_path = 1;
-	filter_refs(&array, &filter, FILTER_REFS_ALL | FILTER_REFS_INCLUDE_BROKEN);
+	filter_refs(&array, &filter, FILTER_REFS_ALL);
 	ref_array_sort(sorting, &array);
 
 	if (!maxcount || array.nr < maxcount)
diff --git a/t/t1430-bad-ref-name.sh b/t/t1430-bad-ref-name.sh
index b1839e0877..fa3aeb80f2 100755
--- a/t/t1430-bad-ref-name.sh
+++ b/t/t1430-bad-ref-name.sh
@@ -170,7 +170,7 @@ test_expect_success 'for-each-ref emits warnings for broken names' '
 	! grep -e "badname" output &&
 	! grep -e "broken\.\.\.symref" output &&
 	test_i18ngrep "ignoring ref with broken name refs/heads/broken\.\.\.ref" error &&
-	test_i18ngrep "ignoring broken ref refs/heads/badname" error &&
+	test_i18ngrep ! "ignoring broken ref refs/heads/badname" error &&
 	test_i18ngrep "ignoring ref with broken name refs/heads/broken\.\.\.symref" error
 '
 
-- 
2.33.0.1071.gb37e412355
Previous: Jeff KingNext: Jeff King
Message 18 of 22 in “enabling GIT_REF_PARANOIA by default”
  1. 0/16 enabling GIT_REF_PARANOIA by defaultJeff King, Sep 24, 2021
  2. 01/16 t7900: clean up some more broken refsJeff King, Sep 24, 2021
  3. Jonathan TanSep 27, 2021
  4. Jeff KingSep 27, 2021
  5. 02/16 t5516: don't use HEAD ref for invalid ref-deletion testsJeff King, Sep 24, 2021
  6. 03/16 t5600: provide detached HEAD for corruption failuresJeff King, Sep 24, 2021
  7. 04/16 t5312: drop "verbose" helperJeff King, Sep 24, 2021
  8. 05/16 t5312: create bogus ref as necessaryJeff King, Sep 24, 2021
  9. 06/16 t5312: test non-destructive repackJeff King, Sep 24, 2021
  10. 07/16 t5312: be more assertive about command failureJeff King, Sep 24, 2021
  11. 08/16 refs-internal.h: move DO_FOR_EACH_* flags next to each otherJeff King, Sep 24, 2021
  12. 09/16 refs-internal.h: reorganize DO_FOR_EACH_* flag documentationJeff King, Sep 24, 2021
  13. 10/16 refs: add DO_FOR_EACH_OMIT_DANGLING_SYMREFS flagJeff King, Sep 24, 2021
  14. 11/16 refs: omit dangling symrefs when using GIT_REF_PARANOIAJeff King, Sep 24, 2021
  15. 12/16 refs: turn on GIT_REF_PARANOIA by defaultJeff King, Sep 24, 2021
  16. Jonathan TanSep 27, 2021
  17. 13/16 repack, prune: drop GIT_REF_PARANOIA settingsJeff King, Sep 24, 2021
  18. 14/16 ref-filter: stop setting FILTER_REFS_INCLUDE_BROKENJeff King, Sep 24, 2021
  19. 15/16 ref-filter: drop broken-ref code entirelyJeff King, Sep 24, 2021
  20. 16/16 refs: drop "broken" flag from for_each_fullref_in()Jeff King, Sep 24, 2021
  21. Jonathan TanSep 27, 2021
  22. Junio C HamanoSep 24, 2021

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