bug#58431: 29.0.50; [Eglot] Add "breadcrumb.el" feature based on imenu.el/project.el services

[João Távora]

On Wed, Oct 12, 2022 at 12:49 AM João Távora <joaotavora@gmail.com> wrote:

> Let's use some M-x artist-mode magic to explain what is in place
> and what I am proposing.
>
> +---+----+   +---------+     +----------+
> |eglot.el|   |python.el|     | ruby.el  |
> +---+----+   +---+-----+     +----+-----+
>     |            |                |
>     |            |                |
>     |            v                |
>     |        +----------+         |
>     +------->| imenu.el |<--------+
>              +-+--------+
>                |
> +--------------+
> |
> |  +-------------------+
> \->|which-func.el      |
> |  |(already working)  |
> |  +-------------------+

> \->|...                |
> |  +-------------------+         +--------------+
> |                                |  project.el  |
> |  o-------------------o         +--------------+
> \->|breadcrumb.el      |             /
>    |(proposed addition)|<------------
>    o-------------------o
>

I've now created https://github.com/joaotavora/breadcrumb with
exactly this architecture.  Suggest everyone interested
check it out.  Propose we add it to ELPA.  It is not
Eglot-specific so it needn't depend on Eglot (but I've tested
it with Eglot and it works well).


João