Re: [PATCH 3/8] archive: add a failure test wrt .gitattributes misreading

[Junio C Hamano <gitster@pobox.com>]

Nguyễn Thái Ngọc Duy  <pclouds@gmail.com> writes:

> "git archive" is used to create archives from a tree (or commit), so
> it should not consult any .gitattributes files on working directory.
>
> It currently does,...

...which _might_ be actively used as a _feature_ by people; I do not think
it is a bad idea to have a mode of operation where it solely works with
in-tree attributes ignoring the work tree ones, and I suspect we probably
would want to make that the default, but "so it should not" is probably a
bit too strong.

For example, an older version may record $Id$ with keyword expansion set
in its in-tree .gitattributes, and you later found it to be a mistake and
have removed it in the current version.  Re-exporting an older version
with the current code wouldn't have $Id$ expanded, but with your patch it
will.

A stronger example would be crlf conversion, I suppose, but the same "with
the current code we can fix it up but after this patch we can't" worry
applies.

So perhaps you may want to resurrect the current behaviour with a new
option --fix-attributes, whose description would be "normally the command
takes attributes settings from the tree being exported, but .gitattributes
files in it may record wrong attributes you may want to fix while
exporting.  With this option, corresponding .gitattributes files in the
work tree will override the in-tree .gitattributes" or something like
that.