difftool's dir-diff feature was blindly feeding worktree paths
to hash-object without checking whether the path was indeed a
file, causing the feature to fail when repositories contain
symlinks to directories.
Ensure that only files are ever given to hash-object.
Add a test to demonstrate the breakage.
Reported-by: Ismail Badawi <ism...@badawi.io>
Signed-off-by: David Aguilar <dav...@gmail.com>
---
git-difftool.perl | 4 +---
t/t7800-difftool.sh | 19 +++++++++++++++++++
2 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/git-difftool.perl b/git-difftool.perl
index 7df7c8a..1abe647 100755
--- a/git-difftool.perl
+++ b/git-difftool.perl
@@ -70,9 +70,7 @@ sub use_wt_file
my ($repo, $workdir, $file, $sha1) = @_;
my $null_sha1 = '0' x 40;
- if (! -e "$workdir/$file") {
- # If the file doesn't exist in the working tree, we cannot
- # use it.
+ if (! -f "$workdir/$file") {
return (0, $null_sha1);
}
diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
index 48c6e2b..ec8bc8c 100755
--- a/t/t7800-difftool.sh
+++ b/t/t7800-difftool.sh
@@ -504,4 +504,23 @@ test_expect_success PERL 'difftool properly honors gitlink
and core.worktree' '
)
'
+test_expect_success PERL,SYMLINKS 'difftool --dir-diff symlinked directories' '
+ git init dirlinks &&
+ (
+ cd dirlinks &&
+ git config diff.tool checktrees &&
+ git config difftool.checktrees.cmd "echo good" &&
+ mkdir foo &&
+ : >foo/bar &&
+ git add foo/bar &&
+ test_commit symlink-one &&
+ ln -s foo link &&
+ git add link &&
+ test_commit symlink-two &&
+ echo good >expect &&
+ git difftool --tool=checktrees --dir-diff HEAD~ >actual &&
+ test_cmp expect actual
+ )
+'
+
test_done
--
2.6.2.281.gac28444
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