Angularls root directory not found

Question

I have the angular language server installed but client doesn't attach when I'm in an angular project because it doesn't have an angular.json in the root (since it is an Nx workspace), which (according to the lsp-config documentation) is the root_pattern for this language server.

In VSCode the language server is fine, and this Stack Overflow question mentions the "legacy view engine" which seems to be related.

I can't find any useful information about how I can set up the lsp config for neovim that will get it to work without the angular.json file present.

I should add I'm using lsp-zero to handle the lsp configuration. I've found scattered bits of info indicating I could use project.json as the root_pattern but I'm stumped as to how I can actually do that in the config.

Answer 1

I'll self answer this question, since I've just stumbled across a post elsewhere that gave me a hint.

I've got the lspconfig extension installed and this provides a utility function for the root_dir function. Since project.json looks like a suitable substitution in Nx workspaces, I've added this to my lsp config:

local util = require('lspconfig.util')

lsp.configure('angularls', {
    root_dir = util.root_pattern('angular.json', 'project.json')
})

Now when I open a file in my Nx angular workspace, the LSP client is attached and I get all the expected functions. I hope this helps fellow Angular Nx devs who use Neovim!