Re: [PATCH v2 2/3] t7800: fix tests when difftool uses --no-symlinks

On Sat, Mar 23, 2013 at 9:31 AM, John Keeping [off-list ref] wrote:

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
   command
5) the output files doesn't contain the expected output, causing the

s/files doesn't/file doesn't/

   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
working tree.

In the longer term, difftool probably needs to learn to warn the user
instead of overwrite any changes that have been made to the working tree

s/overwrite/overwriting/

file.

Signed-off-by: John Keeping <redacted>