Re: PL support

[Sébastien G]

Le samedi 09 mai 2020 à 18:36 +0100, João Távora a écrit :
> enhance eglot.el to automatically download server programs.


Maybe downloading and installing server programs can be delegate to a
new "external-tools.el" library. Something that can manage not only
language server, but any extrnal tools requested by a mode.

This library could provide an API to:
- Declare, in a single elisp function call, an external tool with a
  name and how install it (which pkg and pkg manager to use)
- Let modes request the presence of specific external tool with a
  single elisp function call
- Modes can, optionnaly, request the latest version of the external
  tool to be present

When an external tools is requested:
- If the tool is not installed: Install it
- If the tool is already installed and latest version is required:
  Update it
- If the tool is already installed and latest version is not required:
  Do nothing
- When installing or updating something, ask user confirmation before
  do it
- If the tool requested cannot be installed, the mode can know it and
  desactivate some of its features.


"external-tools" could be useful to many modes and elisp functions.

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