bug#18009: 24.4.50; Add hooks for `rename-file' and `delete-file'

[Stefan Monnier]

> Please add a hook for each of these basic operations.  It is not unusual
> to want to be able to carry out some action associated with
> (successfully) renaming or deleting a file.  The hooks would be run at
> the end of the operation, and only upon success.

It's not unreasonable, but these are rather low-level operations, I'm
not sure I want to run hooks from them.

> One use case: Bookmark+ autofile bookmarks have the same name as their
> files.  (There can be multiple bookmarks with the same name,
> corresponding to files with the same name in different directories.)
> With a hook it would be trivial to automatically rename or delete the
> associated bookmark.

Of course you can use an `advice' in the mean time, but maybe a better
long-term answer is the file-notification API so that your code would
know about renames not only when they're performed from the same Emacs
session but also from any other process.


        Stefan