do not duplicate attributes on include suggestion

[eiswind]

In asciidoc.provider.ts

const globalVariableDefinitions = documentText.match(/:\S+:.*/g)

leads to duplicate entries in the suggestions when i define an attribute in the same file.

:srcdir: ../two

include::{srcdir}/

and further down it appears again (coming from a different provider)

[ggrossetie]

We should not use a regular expression. Instead, we should use Asciidoctor.js to parse the AsciiDoc document using the header_only option. Then, we can retrieve attributes using: Document#getAttributes

[ggrossetie]

It might be because attributeReferenceProvider will return it as well:

asciidoctor-vscode/src/features/attributeReferenceProvider.ts

Line 5 in b65f1c1

export class AttributeReferenceProvider {

We should probably remove const globalVariableDefinitions = documentText.match(/:\S+:.*/g).

I think we should revise our completion item providers to make sure that we don't return the same items more than once.

[eiswind]

That's the case. The duplicate comes from AttributeReferenceProvider.

[ggrossetie]

It should be better in the latest version. Feel free to open a new issue if we can improve it further.