Re: [BUG] git clean -X skips a directory containing only ignored files

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On 01/31/2012 12:36 AM, Paul Berry wrote:
> I am trying to use "git clean -X" to remove object files (which
> are gitignored) from my source tree, but it appears to miss
> object files that are in a subdirectory without any git-tracked
> files:
> 
> $ git init test
> Initialized empty Git repository in /home/pberry/tmp/test/.git/
> $ cd test
> $ mkdir foo
> $ touch foo/bar.o
> $ echo '*.o' > .gitignore
> $ git add .gitignore
> $ git commit -mgitignore
> [master (root-commit) 6b5ffcb] gitignore
>  1 files changed, 1 insertions(+), 0 deletions(-)
>  create mode 100644 .gitignore
> $ git status
> # On branch master
> nothing to commit (working directory clean)
> $ git clean -d -X -f
> $ ls foo
> bar.o
> 
> It seems to me that bar.o should have been removed, because
> according to the git-clean docs, -X means "Remove only files
> ignored by git", and bar.o is definitely being ignored by git.
> 
> 
> It looks like a very similar bug was reported back in 2010, but
> not fixed:
> http://git.661346.n2.nabble.com/BUG-git-clean-X-behaviour-when-gitignore-has-sub-directory-entries-td5575307.html.
> I've confirmed that the workaround mentioned by Jonathan Nieder
> in that thread fixes my problem too (removing "dir.flags |=
> DIR_SHOW_OTHER_DIRECTORIES;" from builtin/clean.c).  However I'm
> guessing from Jonathan's comments that it would be better to fix
> this bug elsewhere (somewhere in dir.c perhaps).

Removing DIR_SHOW_OTHER_DIRECTORIES just happens to not trigger
this particular "bug" but breaks pretty much everything else.

As a workaround, you could explicitly add the directory to your
gitignore file.

Here's a test:

-- >8 --

Subject: [PATCH] t7300-clean: show known breakage with "git clean -d -X"

"git clean -d -X" fails for directories containing only untracked files.
Example:

	$ ls -R .
	.:
	foo
	./foo:
	bar.o
	$ cat .gitignore
	*.o
	$ git clean -d -X -f
	$ ! test -d foo || echo fail

Reported-by: Paul Berry <stereotype441@xxxxxxxxx>
Signed-off-by: Michael Schubert <mschub@xxxxxxxxxxxxx>
---
 t/t7300-clean.sh |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/t/t7300-clean.sh b/t/t7300-clean.sh
index 800b536..0b6d545 100755
--- a/t/t7300-clean.sh
+++ b/t/t7300-clean.sh
@@ -332,6 +332,13 @@ test_expect_success 'git clean -d -X' '
 
 '
 
+test_expect_failure 'git clean -d -X' '
+  mkdir -p a/b &&
+  touch a/b/c.o &&
+  git clean -d -X &&
+  ! test -d a
+'
+
 test_expect_success 'clean.requireForce defaults to true' '
 
 	git config --unset clean.requireForce &&
-- 
1.7.9.174.g356eff6
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