From: "Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>,
yuri.kanivetsky@gmail.com,
"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
Subject: [PATCH v3 4/4] cache-tree: do not generate empty trees as a result of all i-t-a subentries
Date: Sat, 9 Jul 2016 07:23:56 +0200 [thread overview]
Message-ID: <20160709052356.30570-5-pclouds@gmail.com> (raw)
In-Reply-To: <20160709052356.30570-1-pclouds@gmail.com>
If a subdirectory contains nothing but i-t-a entries, we generate an
empty tree object and add it to its parent tree. Which is wrong. Such
a subdirectory should not be added.
Note that this has a cascading effect. If subdir 'a/b/c' contains
nothing but i-t-a entries, we ignore it. But then if 'a/b' contains
only (the non-existing) 'a/b/c', then we should ignore 'a/b' while
building 'a' too. And it goes all the way up to top directory.
Noticed-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
cache-tree.c | 7 +++++++
t/t2203-add-intent.sh | 14 ++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/cache-tree.c b/cache-tree.c
index c2676e8..2d50640 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -380,6 +380,13 @@ static int update_one(struct cache_tree *it,
continue;
}
+ /*
+ * "sub" can be an empty tree if subentries are i-t-a.
+ */
+ if (sub && sub->cache_tree->entry_count < 0 &&
+ !hashcmp(sha1, EMPTY_TREE_SHA1_BIN))
+ continue;
+
strbuf_grow(&buffer, entlen + 100);
strbuf_addf(&buffer, "%o %.*s%c", mode, entlen, path + baselen, '\0');
strbuf_add(&buffer, sha1, 20);
diff --git a/t/t2203-add-intent.sh b/t/t2203-add-intent.sh
index 24aed2e..f4b2fac 100755
--- a/t/t2203-add-intent.sh
+++ b/t/t2203-add-intent.sh
@@ -99,5 +99,19 @@ test_expect_success 'cache-tree does not ignore dir that has i-t-a entries' '
)
'
+test_expect_success 'cache-tree does skip dir that becomes empty' '
+ rm -fr ita-in-dir &&
+ git init ita-in-dir &&
+ (
+ cd ita-in-dir &&
+ mkdir -p 1/2/3 &&
+ echo 4 >1/2/3/4 &&
+ git add -N 1/2/3/4 &&
+ git write-tree >actual &&
+ echo $_EMPTY_TREE >expected &&
+ test_cmp expected actual
+ )
+'
+
test_done
--
2.8.2.537.g0965dd9
next prev parent reply other threads:[~2016-07-09 5:24 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-04 13:50 Git doesn't always add files to a commit (amend) Yuri Kanivetsky
2016-07-04 15:48 ` Duy Nguyen
2016-07-04 17:48 ` [PATCH] cache-tree.c: fix i-t-a check skipping directory updates sometimes Nguyễn Thái Ngọc Duy
2016-07-06 17:43 ` Junio C Hamano
2016-07-06 17:55 ` Junio C Hamano
2016-07-06 18:48 ` [PATCH v2 0/2] cache-tree building fix in the presence of ita entries Nguyễn Thái Ngọc Duy
2016-07-06 18:48 ` [PATCH v2 1/2] cache-tree.c: fix i-t-a entry skipping directory updates sometimes Nguyễn Thái Ngọc Duy
2016-07-06 18:48 ` [PATCH v2 2/2] cache-tree: do not generate empty trees as a result of all i-t-a subentries Nguyễn Thái Ngọc Duy
2016-07-06 19:26 ` Junio C Hamano
2016-07-07 17:12 ` Duy Nguyen
2016-07-07 18:52 ` Junio C Hamano
2016-07-08 15:39 ` Duy Nguyen
2016-07-08 15:53 ` Junio C Hamano
2016-07-08 16:36 ` Duy Nguyen
2016-07-08 17:23 ` Junio C Hamano
2016-07-09 5:23 ` [PATCH v3 0/4] cache-tree building fix in the presence of ita entries Nguyễn Thái Ngọc Duy
2016-07-09 5:23 ` [PATCH v3 1/4] test-lib.sh: introduce and use $_EMPTY_TREE Nguyễn Thái Ngọc Duy
2016-07-12 20:40 ` Junio C Hamano
2016-07-13 15:04 ` Duy Nguyen
2016-07-09 5:23 ` [PATCH v3 2/4] test-lib.sh: introduce and use $_EMPTY_BLOB Nguyễn Thái Ngọc Duy
2016-07-09 5:23 ` [PATCH v3 3/4] cache-tree.c: fix i-t-a entry skipping directory updates sometimes Nguyễn Thái Ngọc Duy
2016-07-09 5:23 ` Nguyễn Thái Ngọc Duy [this message]
2016-07-12 20:49 ` [PATCH v3 4/4] cache-tree: do not generate empty trees as a result of all i-t-a subentries Junio C Hamano
2016-07-13 14:59 ` Duy Nguyen
2016-07-16 5:06 ` [PATCH v4 0/4] cache-tree building fix in the presence of ita entries Nguyễn Thái Ngọc Duy
2016-07-16 5:06 ` [PATCH v4 1/4] test-lib.sh: introduce and use $EMPTY_TREE Nguyễn Thái Ngọc Duy
2016-07-16 5:06 ` [PATCH v4 2/4] test-lib.sh: introduce and use $EMPTY_BLOB Nguyễn Thái Ngọc Duy
2016-07-16 5:06 ` [PATCH v4 3/4] cache-tree.c: fix i-t-a entry skipping directory updates sometimes Nguyễn Thái Ngọc Duy
2016-07-16 5:06 ` [PATCH v4 4/4] cache-tree: do not generate empty trees as a result of all i-t-a subentries Nguyễn Thái Ngọc Duy
2016-07-18 20:48 ` [PATCH v4 0/4] cache-tree building fix in the presence of ita entries Junio C Hamano
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