RSpec support modules are not indexed

Description

Ruby LSP Information

VS Code Version

1.95.0

Ruby LSP Extension Version

0.8.12

Ruby LSP Server Version

0.21.3

Ruby LSP Addons

• Ruby LSP Rails

Ruby Version

3.1.6

Ruby Version Manager

rbenv

Installed Extensions

Ruby LSP Settings

{}

{
  "enableExperimentalFeatures": false,
  "enabledFeatures": {
    "codeActions": true,
    "diagnostics": true,
    "documentHighlights": true,
    "documentLink": true,
    "documentSymbols": true,
    "foldingRanges": true,
    "formatting": true,
    "hover": true,
    "inlayHint": true,
    "onTypeFormatting": true,
    "selectionRanges": true,
    "semanticHighlighting": true,
    "completion": true,
    "codeLens": true,
    "definition": true,
    "workspaceSymbol": true,
    "signatureHelp": true,
    "typeHierarchy": true
  },
  "featuresConfiguration": {},
  "addonSettings": {},
  "rubyVersionManager": {
    "identifier": "auto"
  },
  "customRubyCommand": "",
  "formatter": "rubocop",
  "linters": null,
  "bundleGemfile": "",
  "testTimeout": 30,
  "branch": "",
  "pullDiagnosticsOn": "both",
  "useBundlerCompose": false,
  "bypassTypechecker": false,
  "rubyExecutablePath": "",
  "indexing": {
    "excludedPatterns": [
      "node_modules/**/*",
      "tmp/**/*",
      "spec/**/*_spec.rb",
      "db/**/*",
      "factories/**/*",
      "script/**/*"
    ]
  },
  "erbSupport": true,
  "useLauncher": false
}

Reproduction steps

While it's possible to specify includePatterns and excludePatterns for rubyLsp.indexing, those values are concatenated to the default values for those settings. That makes it impossible to configure ruby-lsp to index RSpec support files.

For example, RSpec will add spec to $LOAD_PATH, so we can add some support file to spec/my_helper_module.rb, for example, and include that module in a context. Here's an example on how it works:

module LoggedInAsAdmin
  extend RSpec::Core::SharedContext
  before(:example) do
    log_in_as :admin
  end
end
describe "admin section" do
  include LoggedInAsAdmin
  # ...
end

In the example above, LoggedInAsAdmin is not going to be indexed, so we can't jump to its definition from VSCode.

Currently, it's not possible to override the exclusion pattern "spec/**/*" defined by default, from VSCode settings.

We should be allowed to override those exclusions in order to enable indexing of RSpec support files.

Start with lib/ruby_indexer/lib/ruby_indexer/configuration.rb at the default exclusion pattern referenced in the issue, then trace how rubyLsp.indexing includePatterns and excludePatterns are combined. Verify how VS Code settings are applied and make it possible to override the default spec/**/* exclusion so support files such as spec/my_helper_module.rb are indexed. Done means RSpec support module definitions can be indexed and navigated to from VS Code.