When 'git difftool --dir-diff' is using --no-symlinks (either explicitly
or implicitly because it's running on Windows), any working tree files
that have been copied to the temporary directory are copied back after
the difftool completes.
Because an earlier test uses "git add .", the "output" file used by
tests is tracked by Git and the following sequence occurs during some
1) the shell opens "output" to redirect the difftool output
2) difftool copies the empty "output" to the temporary directory
3) difftool runs "ls" which writes to "output"
4) difftool copies the empty "output" file back over the output of the
5) the output file doesn't contain the expected output, causing the
test to fail
Instead of adding all changes, explicitly add only the files that the
test is using, allowing later tests to write their result files into the
Signed-off-by: John Keeping <j...@keeping.me.uk>
Changes since v2:
- Fix grammar issues in commit message
- Remove the final paragraph of the commit message since this is now
addressed by patch 2/5 in this series
t/t7800-difftool.sh | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
index 9fd09db..df443a9 100755
@@ -314,7 +314,7 @@ test_expect_success PERL 'setup change in subdirectory' '
git commit -m "added sub/sub" &&
echo test >>file &&
echo test >>sub/sub &&
- git add . &&
+ git add file sub/sub &&
git commit -m "modified both"
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