Re: Subprojects in project.el (Was: Eglot, project.el, and python virtual environments)

[Dmitry Gutov]

On 25/11/22 09:30, Eli Zaretskii wrote:
> I'm probably missing something: how does a Lisp program construct an
> instance of a project with a known backend?  For example, if the project is
> of the 'transient' kind, how would such a Lisp program go about constructing
> an instance without exposing/knowing about the internals of the project
> object?  I see no generic make-project API that such a Lisp program could
> call.  What did I miss?

The Lisp program that constructs instances of 'transient' is 
'project-current'. There could also someday be a new function that we 
add by its side (e.g. a helper function) which would also do that. And 
that's okay because they belong to the same package, and thus do not 
export the "private" knowledge.

The program that creates instances of 'vc' type is called 
'project-try-vc'. But we could similarly add a generic method belonging 
to the same unit of code (called 'project-subprojects') which would 
"belong" to the VC project backend and create a list of instances of its 
type.