[PATCH] format-patch: clear UNINTERESTING flag before prepare_bases

[Xiaolong Ye]

When users specify the commit range with 'Z..C' pattern for format-patch, all
the parents of Z (including Z) would be marked as UNINTERESTING which would
prevent revision walk in prepare_bases from getting the prerequisite commits,
thus `git format-patch --base <base_commit_sha> Z..C` won't be able to generate
the list of prerequisite patch ids. Clear UNINTERESTING flag with
clear_object_flags solves this issue.

Reported-by: Eduardo Habkost <ehabk...@redhat.com>
Signed-off-by: Xiaolong Ye <xiaolong...@intel.com>
---
 builtin/log.c           | 1 +
 t/t4014-format-patch.sh | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/builtin/log.c b/builtin/log.c
index 4686f68594..01993de6fe 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1746,6 +1746,7 @@ int cmd_format_patch(int argc, const char **argv, const 
char *prefix)
        if (base_commit || base_auto) {
                struct commit *base = get_base_commit(base_commit, list, nr);
                reset_revision_walk();
+               clear_object_flags(UNINTERESTING);
                prepare_bases(&bases, base, list, nr);
        }
 
diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 028d5507a6..53880da7bb 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -1554,13 +1554,15 @@ test_expect_success 'format-patch -o overrides 
format.outputDirectory' '
 
 test_expect_success 'format-patch --base' '
        git checkout side &&
-       git format-patch --stdout --base=HEAD~3 -1 | tail -n 7 >actual &&
+       git format-patch --stdout --base=HEAD~3 -1 | tail -n 7 >actual1 &&
+       git format-patch --stdout --base=HEAD~3 HEAD~.. | tail -n 7 >actual2 &&
        echo >expected &&
        echo "base-commit: $(git rev-parse HEAD~3)" >>expected &&
        echo "prerequisite-patch-id: $(git show --patch HEAD~2 | git patch-id 
--stable | awk "{print \$1}")" >>expected &&
        echo "prerequisite-patch-id: $(git show --patch HEAD~1 | git patch-id 
--stable | awk "{print \$1}")" >>expected &&
        signature >> expected &&
-       test_cmp expected actual
+       test_cmp expected actual1 &&
+       test_cmp expected actual2
 '
 
 test_expect_success 'format-patch --base errors out when base commit is in 
revision list' '
-- 
2.16.GIT