Allow file exclusions in diffs

[anonymous@…]

Trac should allow us to set file types (by extension) that should not be diff-ed. A lot of large auto generated xml-based files are showing up in changesets and they really hurt performance and make Trac difficult to use.

[Emmanuel Blot]

Note that has an (incomplete) workaround, you can prevent Trac from generation large diff with an option in trac.ini, using the number of files and/or the size of the diff, see TracIni#changeset-section.

The filtering should be based on the file MIME type rather than the file extension BTW.

[Remy Blank]

I see that this could be useful. I'll see what I can do.

[Remy Blank]

#7304 was closed as a duplicate. It suggested ignoring files by a list of glob patterns, and not to use the list when a single file is diffed.

[Remy Blank]

Refocusing.

[ilewismsl]

While not ideal, because it would be useful to restrict diffs, while still allowing view of a mime type, the trac.ini [mimeview] treat_as_binary key provides a partial workaround for this issue (see also #2672).

By adding a mime type to the treat_as_binary list, you can get Trac to treat the file type as binary. With that change, Trac will not attempt to diff the file type. The drawback is that it also will not display the file type in the browser any more.