Re: [PATCH 05/19] tree_entry_interesting(): remove dependency on struct diff_options

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Nguyán ThÃi Ngác Duy <pclouds@xxxxxxxxx> writes:

> This function can be potentially used in more places than just
> tree-diff.c. "struct diff_options" does not make much sense outside
> diff_tree_sha1().
>
> While removing the use of diff_options, it also removes
> tree_entry_extract() call, which means S_ISDIR() uses the entry->mode
> directly, without being filtered by canon_mode() (called internally
> inside tree_entry_extract)
>
> Signed-off-by: Nguyán ThÃi Ngác Duy <pclouds@xxxxxxxxx>

The patch looks good, but the second paragraph above sounded unnecessarily
alarming and I had to read it three times to make sure nothing fishy is
going on ;-).

It bypasses tree-entry-extract call and uses fields of "entry" directly.
With the change, entry->mode is used without first getting normalized with
canon_mode(), but the only use of the mode information in this function is
to check the type of the entry by giving it to S_ISDIR() macro, and the
result does not change with or without canon_mode(), so it is Ok.
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