Add support for dart in vscode-dart

We are working on improving graphql support for dart. vscode-apollo is the best plugin to provide syntax highlighting in vscode and we wouldn’t want to create a separate plugin just to allow syntax highlighting in dart.

This would just be a matter of adding a new template syntax to vscode-apollo. We can use this as a reference implementation: https://github.com/apollographql/apollo-tooling/blob/master/packages/vscode-apollo/syntaxes/graphql.py.json

If the Apollo team is OK with this, I or someone on my team can submit a pull request with the additional syntax.

The syntax we would support will look like this:

var query = gql("""
                query GetCard(\$id:CardId!) {
                  card(id:\$id) {
                    id
                    name
                    completed
                }
                """);

[venkatd]

@JakeDawkins I’ve got it working in the PR but need some guidance on how to properly build and test the extension. I’ve currently patched the changes in directly to see that it all works. Who would be someone good to talk to about this?

Thanks!

[comerc]

@venkatd I also see this bug: Dart is not syntax highlighting. Do you have solution?

• Apollo GraphQL v1.19.9
• apollo/2.33.10 darwin-x64 node-v16.14.0
• Flutter (Channel stable, 2.10.3, on macOS 12.2)
• VS Code (version 1.66.1)

When VSCode starts up, I see that it works. But after a minute, the highlighting turns off.