Add support for asdf-vm installed via MacPorts

[DrTom]

I have checked that this feature is not already implemented

• This feature does not exist

Use case

Currently asdf-vm is supported for various install methods including HomeBrew but not via the MacPorts https://www.macports.org/ system.

Description

Ruby installs from asdf-vm should be detected if asdf-vm was installed via MacPorts.

Implementation

In src/ruby/asdf.ts various search paths are present, e.g. for Homebrew

ruby-lsp/vscode/src/ruby/asdf.ts

Lines 60 to 68 in bbc1ccb

	vscode.Uri.joinPath(
	vscode.Uri.file("/"),
	"opt",
	"homebrew",
	"opt",
	"asdf",
	"libexec",
	scriptName,
	),

.

Support for MacPorts can be added by adding the additional default path for asdf-vm from MacPorts in the following way:

      vscode.Uri.joinPath(
        vscode.Uri.file("/"),
        "opt",
        "local",
        "share",
        "asdf",
        scriptName,
      ),

[andyw8]

Thank for you for the suggestion.

If we were to implemented this, then we'd probably want MacPorts supported for all version managers on Mac, to avoid inconsistency. It may be helpful to introduce some abstraction for Homebrew/MacPorts to reduce duplication.

In the meantime, you can set a custom path for MacPort's adsf installation:
https://shopify.github.io/ruby-lsp/version-managers.html#custom-activation

(If anyone is interested in implementing this, please reach out to discuss your approach first).