John Keeping <j...@keeping.me.uk> writes:
> It can't ever happen because we only call this if the mode is non-zero
> in which case the SHA-1 is only null if there are unstaged changes.
>
> However, I think this revised version is much clearer.
Yes, that makes the intention crystal clear. I like it.
>
> git-difftool.perl | 6 ++++++
> t/t7800-difftool.sh | 7 +++++++
> 2 files changed, 13 insertions(+)
>
> diff --git a/git-difftool.perl b/git-difftool.perl
> index 6780292..8a75205 100755
> --- a/git-difftool.perl
> +++ b/git-difftool.perl
> @@ -92,6 +92,12 @@ sub use_wt_file
> return 0;
> }
>
> + if (! -e "$workdir/$file") {
> + # If the file doesn't exist in the working tree, we cannot
> + # use it.
> + return (0, $null_sha1);
> + }
> +
> my $wt_sha1 = $repo->command_oneline('hash-object', "$workdir/$file");
> my $use = ($sha1 eq $null_sha1) || ($sha1 eq $wt_sha1);
> return ($use, $wt_sha1);
> diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
> index a6bd99e..d46f041 100755
> --- a/t/t7800-difftool.sh
> +++ b/t/t7800-difftool.sh
> @@ -356,6 +356,13 @@ run_dir_diff_test 'difftool --dir-diff from
> subdirectory' '
> )
> '
>
> +run_dir_diff_test 'difftool --dir-diff when worktree file is missing' '
> + test_when_finished git reset --hard &&
> + rm file2 &&
> + git difftool --dir-diff $symlinks --extcmd ls branch master >output &&
> + grep file2 output
> +'
> +
> write_script .git/CHECK_SYMLINKS <<\EOF
> for f in file file2 sub/sub
> do
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