No "invalid" status notification when rust-analyzer fails to discover a workspace #5829
Description
YCM relies on receiving rust-analyzer/status with either ready or invalid as a signal that rust-analyzer has finished all the background work at startup.
However, the version available through rustup, as well as the current master (844e1aa7), never send the notification if there's no actual workspace. Instead, I only see a window/showMessage notification. An example trace of exchanged messages:
2020-08-20 16:26:28,826 - DEBUG - TX: Sending message: b'Content-Length: 987\r\n\r\n{"id":1,"jsonrpc":"2.0","method":"initialize","params":{"capabilities":{"experimental":{"statusNotification":true},"textDocument":{"codeAction":{"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}}},"completion":{"completionItem":{"documentationFormat":["plaintext","markdown"]},"completionItemKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]}},"hover":{"contentFormat":["plaintext","markdown"]},"signatureHelp":{"signatureInformation":{"documentationFormat":["plaintext","markdown"],"parameterInformation":{"labelOffsetSupport":true}}},"synchronization":{"didSave":true}},"workspace":{"configuration":true}},"initializationOptions":{},"processId":12967,"rootPath":"/home/bstaletic/.vim/pack/bundle/start/YouCompleteMe/third_party/ycmd","rootUri":"file:///home/bstaletic/.vim/pack/bundle/start/YouCompleteMe/third_party/ycmd"}}'
2020-08-20 16:26:28,830 - DEBUG - RX: Received message: b'{"jsonrpc":"2.0","id":1,"result":{"capabilities":{"callHierarchyProvider":true,"codeActionProvider":{"codeActionKinds":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite"]},"codeLensProvider":{"resolveProvider":true},"completionProvider":{"triggerCharacters":[":","."]},"definitionProvider":true,"documentFormattingProvider":true,"documentHighlightProvider":true,"documentOnTypeFormattingProvider":{"firstTriggerCharacter":"=","moreTriggerCharacter":[".",">"]},"documentSymbolProvider":true,"experimental":{"joinLines":true,"onEnter":true,"parentModule":true,"runnables":{"kinds":["cargo"]},"ssr":true},"foldingRangeProvider":true,"hoverProvider":true,"implementationProvider":true,"referencesProvider":true,"renameProvider":{"prepareProvider":true},"selectionRangeProvider":true,"semanticTokensProvider":{"documentProvider":{"edits":true},"legend":{"tokenModifiers":["documentation","declaration","definition","static","abstract","deprecated","readonly","constant","controlFlow","injected","mutable","consuming","unsafe","attribute"],"tokenTypes":["comment","keyword","string","number","regexp","operator","namespace","type","struct","class","interface","enum","typeParameter","function","member","property","macro","variable","parameter","label","attribute","boolean","builtinType","enumMember","escapeSequence","formatSpecifier","generic","lifetime","punctuation","selfKeyword","typeAlias","union","unresolvedReference"]},"rangeProvider":true},"signatureHelpProvider":{"triggerCharacters":["(",","]},"textDocumentSync":{"change":2,"openClose":true,"save":{}},"typeDefinitionProvider":true,"workspaceSymbolProvider":true},"serverInfo":{"name":"rust-analyzer","version":"844e1aa"}}}'
2020-08-20 16:26:28,831 - DEBUG - TX: Sending notification: b'Content-Length: 52\r\n\r\n{"jsonrpc":"2.0","method":"initialized","params":{}}'
2020-08-20 16:26:28,831 - DEBUG - TX: Sending notification: b'Content-Length: 86\r\n\r\n{"jsonrpc":"2.0","method":"workspace/didChangeConfiguration","params":{"settings":{}}}'
2020-08-20 16:26:28,831 - DEBUG - TX: Sending notification: b'Content-Length: 144\r\n\r\n{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"rust","text":"\\n","uri":"file:///foo.rs","version":1}}}'
2020-08-20 16:26:28,849 - DEBUG - RX: Received message: b'{"jsonrpc":"2.0","method":"window/showMessage","params":{"message":"rust-analyzer failed to discover workspace","type":1}}'
2020-08-20 16:26:28,849 - DEBUG - RX: Received message: b'{"jsonrpc":"2.0","id":0,"method":"client/registerCapability","params":{"registrations":[{"id":"textDocument/didSave","method":"textDocument/didSave","registerOptions":{"documentSelector":[{"pattern":"**/*.rs"},{"pattern":"**/Cargo.toml"},{"pattern":"**/Cargo.lock"}],"includeText":false}}]}}'
2020-08-20 16:26:28,849 - DEBUG - TX: Sending response: b'Content-Length: 38\r\n\r\n{"id":0,"jsonrpc":"2.0","result":null}'
2020-08-20 16:26:28,855 - DEBUG - RX: Received message: b'{"jsonrpc":"2.0","id":1,"method":"workspace/configuration","params":{"items":[{"section":"rust-analyzer"}]}}'
2020-08-20 16:26:28,855 - DEBUG - TX: Sending response: b'Content-Length: 40\r\n\r\n{"id":1,"jsonrpc":"2.0","result":[null]}'
This is the rust-analyzer log with RA_LOG set to rust-analyzer=trace:
[INFO rust_analyzer] lifecycle: server started
[INFO rust_analyzer::config] Config::update({})
[INFO rust_analyzer::main_loop] initial config: Config {
client_caps: ClientCapsConfig {
location_link: false,
line_folding_only: false,
hierarchical_symbols: false,
code_action_literals: true,
work_done_progress: false,
code_action_group: false,
resolve_code_action: false,
hover_actions: false,
status_notification: true,
signature_help_label_offsets: true,
},
publish_diagnostics: true,
diagnostics: DiagnosticsConfig {
disable_experimental: false,
disabled: {},
},
diagnostics_map: DiagnosticsMapConfig {
warnings_as_info: [],
warnings_as_hint: [],
},
lru_capacity: None,
proc_macro_srv: None,
files: FilesConfig {
watcher: Notify,
exclude: [],
},
notifications: NotificationsConfig {
cargo_toml_not_found: true,
},
cargo_autoreload: true,
cargo: CargoConfig {
no_default_features: false,
all_features: false,
features: [],
load_out_dirs_from_check: false,
target: None,
},
rustfmt: Rustfmt {
extra_args: [],
},
flycheck: Some(
CargoCommand {
command: "check",
target_triple: None,
all_targets: true,
no_default_features: false,
all_features: false,
features: [],
extra_args: [],
},
),
inlay_hints: InlayHintsConfig {
type_hints: true,
parameter_hints: true,
chaining_hints: true,
max_length: None,
},
completion: CompletionConfig {
enable_postfix_completions: true,
add_call_parenthesis: true,
add_call_argument_snippets: true,
snippet_cap: None,
},
assist: AssistConfig {
snippet_cap: None,
allowed: None,
},
call_info_full: true,
lens: LensConfig {
run: true,
debug: true,
implementations: true,
},
hover: HoverConfig {
implementations: true,
run: true,
debug: true,
goto_type_def: true,
},
with_sysroot: true,
linked_projects: [],
root_path: AbsPathBuf(
"/home/bstaletic/.vim/pack/bundle/start/YouCompleteMe/third_party/ycmd",
),
}
[INFO rust_analyzer::main_loop] handle_event(Notification(Notification { method: "workspace/didChangeConfiguration", params: Object({"settings": Object({})}) }))
[INFO rust_analyzer::main_loop] handle_event(Workspaces([]))
[INFO rust_analyzer::reload] reloading projects: []
[INFO rust_analyzer::main_loop] handle_event(Notification { method: "textDocument/didOpen" })
[INFO rust_analyzer::main_loop] handle_event(Response(Response { id: RequestId(U64(0)), result: None, error: None }))
[INFO rust_analyzer::main_loop] handle_event(Response(Response { id: RequestId(U64(1)), result: Some(Array([Null])), error: None }))
[DEBUG rust_analyzer::main_loop] config update response: 'Response { id: RequestId(U64(1)), result: Some(Array([Null])), error: None }
[INFO rust_analyzer::config] Config::update(null)