Add a way to use custom syntaxes

[citorva]

The raw function allows to use custom or less known language through the syntaxes which takes a path to a sublime-syntax file. It looks good add a same argument to allows the use of sourcerer with custom syntaxes

[miestrode]

Hello! I agree, and am currently working on this.

[citorva]

After using the module, this issue was indeed a non-issue because the syntax is made from a raw element and the lang parameter is just a description of the code label.

[miestrode]

This is indeed possible with the current release. I will still be adding native support for this, for convenience and future-proofing.

[citorva]

I have rechecked and sourcerer lost syntax colorization with custom syntaxes. I reopen then the issue

[citorva]

A temporary working workaround was replacing the last raw call with this code:

  let source_args = (
    lang: source.lang
  )

  if source.has("theme") {
    source_args.insert("theme", source.theme)
  }

  if source.has("syntaxes") {
    source_args.insert("syntaxes", source.syntaxes)
  }

  raw(block: true, ..source_args, unlabelled-source)