Re: running EDE from a file that is not under a project root dir

[Dmitry Gutov <dgutov@yandex.ru>]

On 08/04/2015 09:13 PM, Stephen Leake wrote:

> But then it uses semantic-symref-derive-find-filepatterns to get the
> file patterns to pass to grep. Since I'm starting from a text-mode
> buffer, that returns (*.letter *.article *.te?xt). Which is _not_ what I
> want; I want *.el.

If we don't want to change too much code, I suppose 
xref-collect-references could bind semantic-symref-filepattern-alist to 
a list of one element:

`((,major-mode "*"))

Though that will search in all files. To refine it further, indeed we 
could make the choice based on what the project tells us.

> My question is this; what is the minimum change I should make to EDE to
> support these use cases?
>
> I think I need three things:
>
> - add a "file patterns" element to the EDE project (or target?) data
> structure, and have semantic-symref-derive-find-filepatterns check that
> before the alists.

That's cool, but won't help xref-find-references if EDE isn't used. A 
hard dependency on EDE could even break the current usage of 
semantic-symref-find-references-by-name in xref-find-references.

On the other hand, if we introduce project-source-file-patterns, 
xref-find-references could use it in the 
semantic-symref-filepattern-alist binding.

And ede-source-file-patterns could be used by semantic-symref-symbol and 
semantic-symref-regexp.

That issue aside, xref-find-references currently doesn't use 
project-ignores, nor does it use grep-find-ignored-directories and 
grep-find-ignored-files. Thought it still works reasonably quickly as 
long as the "uninteresting" files don't match the file name pattern we 
search for.

> - add an ede-global-project variable that I can set to my current
> project, to bypass the project root detection.
>
>      I've proposed the same change to project.el; there, it can be used
>      by one of the project-find functions.

project.el doesn't need that variable. The variable can just as well 
live in the package you're writing.