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[PATCH 3/1] update-index doc: note a fixed bug in the untracked cache

From
Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Date
Dec 27, 2017, 11:28 UTC
Message-ID
<20171227112854.1322-1-avarab@gmail.com>
In-Reply-To
<20171227102551.GA26616@ash>

Document the bug tested for in my "status: add a failing test showing a core.untrackedCache bug" and fixed in Duy's "dir.c: fix missing dir invalidation in untracked code".

Since this is very likely something others will encounter in the future on older versions, and it's not obvious how to fix it let's document both that it exists, and how to "fix" it with a one-off command.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
Show 6 quoted lines
> On Tue, Dec 26, 2017 at 05:47:19PM +0700, Duy Nguyen wrote:
>> Strangely, root dir is not cached (no valid flag). I don't know why
>> but that's ok we'll roll with it.
>
> I figured this out. Which is good because now I know how/why the bug
> happens.

Thanks a lot. I think it's probably good to apply something like this on top of this now 3-patch series.

 Documentation/git-update-index.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)
diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index bdb0342593..bc6c32002f 100644
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -464,6 +464,17 @@ command reads the index; while when `--[no-|force-]untracked-cache`
 are used, the untracked cache is immediately added to or removed from
 the index.
 
+Before 2.16, the untracked cache had a bug where replacing a directory
+with a symlink to another directory could cause it to incorrectly show
+files tracked by git as untracked. See the "status: add a failing test
+showing a core.untrackedCache bug" commit to git.git. A workaround for
+that was (and this might work for other undiscoverd bugs in the
+future):
+
+----------------
+$ git -c core.untrackedCache=false status
+----------------
+
 File System Monitor
 -------------------
 
-- 
2.15.1.424.g9478a66081
Previous: Duy NguyenNext: Junio C Hamano
Message 6 of 12 in “status: add a failing test showing a core.untrackedCache bug”
  1. status: add a failing test showing a core.untrackedCache bugÆvar Arnfjörð Bjarmason, Dec 22, 2017
  2. Duy NguyenDec 25, 2017
  3. Ævar Arnfjörð BjarmasonDec 25, 2017
  4. Duy NguyenDec 26, 2017
  5. Duy NguyenDec 27, 2017
  6. 3/1 update-index doc: note a fixed bug in the untracked cacheÆvar Arnfjörð Bjarmason, Dec 27, 2017
  7. Junio C HamanoDec 27, 2017
  8. Eric SunshineDec 27, 2017
  9. Junio C HamanoDec 27, 2017
  10. Ævar Arnfjörð BjarmasonDec 27, 2017
  11. Duy NguyenDec 28, 2017
  12. Junio C HamanoDec 28, 2017

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