wip: Fetching diagnostics, parsing notifications.

1 files changed, 45 insertions, 0 deletions

diff --git a/helix-lsp/log b/helix-lsp/log
new file mode 100644
index 00000000..d8370f16
--- /dev/null
+++ b/helix-lsp/log
@@ -0,0 +1,45 @@
+Sun Oct 18 21:15:33 2020:["lsp#register_server", "server registered", "typescript-language-server"]
+Sun Oct 18 21:15:33 2020:["lsp#register_server", "server registered", "elixir-ls"]
+Sun Oct 18 21:15:33 2020:["lsp#register_server", "server registered", "vue-language-server"]
+Sun Oct 18 21:15:33 2020:["lsp#register_server", "server registered", "rust-analyzer"]
+Sun Oct 18 21:15:33 2020:["s:on_text_document_did_open()", 1, "", "/Users/speed/src/helix/helix-lsp", ""]
+Sun Oct 18 21:15:34 2020:["s:on_text_document_did_close()", 1]
+Sun Oct 18 21:15:34 2020:["s:on_text_document_did_open()", 1, "rust", "/Users/speed/src/helix", "file:///Users/speed/src/helix/helix-lsp/src/lib.rs"]
+Sun Oct 18 21:15:34 2020:["Starting server", "rust-analyzer", ["rust-analyzer"]]
+Sun Oct 18 21:15:34 2020:[{"response": {"data": {"__data__": "vim-lsp", "lsp_id": 7, "server_name": "rust-analyzer"}, "message": "started lsp server successfully"}}]
+Sun Oct 18 21:15:34 2020:["--->", 7, "rust-analyzer", {"method": "initialize", "params": {"rootUri": "file:///Users/speed/src/helix/helix-lsp", "capabilities": {"workspace": {"configuration": true, "applyEdit": true}, "textDocument": {"implementation": {"linkSupport": true}, "documentSymbol": {"symbolKind": {"valueSet": [10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 1, 2, 3, 4, 5, 6, 7, 8, 9]}, "hierarchicalDocumentSymbolSupport": false}, "semanticHighlightingCapabilities": {"semanticHighlighting": false}, "codeAction": {"codeActionLiteralSupport": {"codeActionKind": {"valueSet": ["", "quickfix", "refactor", "refactor.extract", "refactor.inline", "refactor.rewrite", "source", "source.organizeImports"]}}, "dynamicRegistration": false}, "completion": {"completionItem": {"snippetSupport": false, "documentationFormat": ["plaintext"]}, "completionItemKind": {"valueSet": [10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 1, 2, 3, 4, 5, 6, 7, 8, 9]}}, "foldingRange": {"lineFoldingOnly": true}, "typeDefinition": {"linkSupport": true}, "typeHierarchy": false, "declaration": {"linkSupport": true}, "definition": {"linkSupport": true}}}, "rootPath": "/Users/speed/src/helix/helix-lsp", "processId": 22973, "trace": "off"}}]
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+Sun Oct 18 21:15:34 2020:["--->", 7, "rust-analyzer", {"method": "initialized", "params": {}}]
+Sun Oct 18 21:15:34 2020:[{"response": {"data": {"__data__": "vim-lsp", "server_name": "rust-analyzer"}, "message": "configuration sent"}}]
+Sun Oct 18 21:15:34 2020:["s:update_file_content()", 1]
+Sun Oct 18 21:15:34 2020:["--->", 7, "rust-analyzer", {"method": "textDocument/didOpen", "params": {"textDocument": {"uri": "file:///Users/speed/src/helix/helix-lsp/src/lib.rs", "version": 1, "languageId": "rust", "text": "use std::collections::HashMap;\n\nuse jsonrpc_core as jsonrpc;\nuse lsp_types as lsp;\n\nuse serde::{Deserialize, Serialize};\nuse serde_json::Value;\n\nuse smol::channel::{Receiver, Sender};\nuse smol::io::{BufReader, BufWriter};\nuse smol::prelude::*;\nuse smol::process::{Child, ChildStderr, ChildStdin, ChildStdout, Command, Stdio};\nuse smol::Executor;\n\nuse futures_util::{select, FutureExt};\n\n/// A type representing all possible values sent from the server to the client.\n#[derive(Debug, PartialEq, Clone, Deserialize, Serialize)]\n#[serde(deny_unknown_fields)]\n#[serde(untagged)]\nenum Message {\n    /// A regular JSON-RPC request output (single response).\n    Output(jsonrpc::Output),\n    /// A notification.\n    Notification(jsonrpc::Notification),\n    /// A JSON-RPC request\n    Call(jsonrpc::Call),\n}\n\npub struct Client {\n    process: Child,\n    stderr: BufReader<ChildStderr>,\n    outgoing: Sender<Payload>,\n\n    pub request_counter: u64,\n\n    capabilities: Option<lsp::ServerCapabilities>,\n}\n\nimpl Client {\n    pub fn start(ex: &Executor, cmd: &str, args: &[String]) -> Self {\n        let mut process = Command::new(cmd)\n            .args(args)\n            .stdin(Stdio::piped())\n            .stdout(Stdio::piped())\n            .stderr(Stdio::piped())\n            .spawn()\n            .expect(\"Failed to start language server\");\n        // smol makes sure the process is reaped on drop, but using kill_on_drop(true) maybe?\n\n        // TODO: do we need bufreader/writer here? or do we use async wrappers on unblock?\n        let writer = BufWriter::new(process.stdin.take().expect(\"Failed to open stdin\"));\n        let reader = BufReader::new(process.stdout.take().expect(\"Failed to open stdout\"));\n        let stderr = BufReader::new(process.stderr.take().expect(\"Failed to open stderr\"));\n\n        let (incoming, outgoing) = Transport::start(ex, reader, writer);\n\n        Client {\n            process,\n            stderr,\n            outgoing,\n\n            request_counter: 0,\n\n            capabilities: None,\n        }\n    }\n\n    fn next_request_id(&mut self) -> jsonrpc::Id {\n        let id = jsonrpc::Id::Num(self.request_counter);\n        self.request_counter += 1;\n        id\n    }\n\n    fn to_params(value: Value) -> anyhow::Result<jsonrpc::Params> {\n        use jsonrpc::Params;\n\n        let params = match value {\n            Value::Null => Params::None,\n            Value::Bool(_) | Value::Number(_) | Value::String(_) => Params::Array(vec![value]),\n            Value::Array(vec) => Params::Array(vec),\n            Value::Object(map) => Params::Map(map),\n        };\n\n        Ok(params)\n    }\n\n    pub async fn request<R: lsp::request::Request>(\n        &mut self,\n        params: R::Params,\n    ) -> anyhow::Result<R::Result>\n    where\n        R::Params: serde::Serialize,\n        R::Result: core::fmt::Debug, // TODO: temporary\n    {\n        let params = serde_json::to_value(params)?;\n\n        let request = jsonrpc::MethodCall {\n            jsonrpc: Some(jsonrpc::Version::V2),\n            id: self.next_request_id(),\n            method: R::METHOD.to_string(),\n            params: Self::to_params(params)?,\n        };\n\n        let (tx, rx) = smol::channel::bounded::<anyhow::Result<Value>>(1);\n\n        self.outgoing\n            .send(Payload::Request {\n                chan: tx,\n                value: request,\n            })\n            .await?;\n\n        let response = rx.recv().await??;\n\n        let response = serde_json::from_value(response)?;\n\n        // TODO: we should pass request to a sender thread via a channel\n        // so it can't be interleaved\n\n        // TODO: responses can be out of order, we need to register a single shot response channel\n\n        Ok(response)\n    }\n\n    pub async fn notify<R: lsp::notification::Notification>(\n        &mut self,\n        params: R::Params,\n    ) -> anyhow::Result<()>\n    where\n        R::Params: serde::Serialize,\n    {\n        let params = serde_json::to_value(params)?;\n\n        let notification = jsonrpc::Notification {\n            jsonrpc: Some(jsonrpc::Version::V2),\n            method: R::METHOD.to_string(),\n            params: Self::to_params(params)?,\n        };\n\n        self.outgoing\n            .send(Payload::Notification(notification))\n            .await?;\n\n        Ok(())\n    }\n\n    // -------------------------------------------------------------------------------------------\n    // General messages\n    // -------------------------------------------------------------------------------------------\n\n    pub async fn initialize(&mut self) -> anyhow::Result<()> {\n        // TODO: delay any requests that are triggered prior to initialize\n\n        #[allow(deprecated)]\n        let params = lsp::InitializeParams {\n            process_id: Some(u64::from(std::process::id())),\n            root_path: None,\n            // root_uri: Some(lsp_types::Url::parse(\"file://localhost/\")?),\n            root_uri: None, // set to project root in the future\n            initialization_options: None,\n            capabilities: lsp::ClientCapabilities::default(),\n            trace: None,\n            workspace_folders: None,\n            client_info: None,\n        };\n\n        let response = self.request::<lsp::request::Initialize>(params).await?;\n        self.capabilities = Some(response.capabilities);\n\n        // next up, notify<initialized>\n        self.notify::<lsp::notification::Initialized>(lsp::InitializedParams {})\n            .await?;\n\n        Ok(())\n    }\n\n    pub async fn shutdown(&mut self) -> anyhow::Result<()> {\n        self.request::<lsp::request::Shutdown>(()).await\n    }\n\n    pub async fn exit(&mut self) -> anyhow::Result<()> {\n        self.notify::<lsp::notification::Exit>(()).await\n    }\n\n    // -------------------------------------------------------------------------------------------\n    // Text document\n    // -------------------------------------------------------------------------------------------\n\n    pub async fn text_document_did_open(\n        &mut self,\n        state: &helix_core::State,\n    ) -> anyhow::Result<()> {\n        self.notify::<lsp::notification::DidOpenTextDocument>(lsp::DidOpenTextDocumentParams {\n            text_document: lsp::TextDocumentItem {\n                uri: lsp::Url::from_file_path(\n                    std::fs::canonicalize(state.path.as_ref().unwrap()).unwrap(),\n                )\n                .unwrap(),\n                language_id: \"rust\".to_string(), // TODO: hardcoded for now\n                version: 0,\n                text: String::from(&state.doc),\n            },\n        })\n        .await\n    }\n\n    // TODO: trigger any time history.commit_revision happens\n    pub async fn text_document_did_change(\n        &mut self,\n        state: &helix_core::State,\n    ) -> anyhow::Result<()> {\n        self.notify::<lsp::notification::DidSaveTextDocument>(lsp::DidSaveTextDocumentParams {\n            text_document: lsp::TextDocumentIdentifier::new(\n                lsp::Url::from_file_path(state.path.as_ref().unwrap()).unwrap(),\n            ),\n            text: None, // TODO?\n        })\n        .await\n    }\n\n    pub async fn text_document_did_close(&mut self) -> anyhow::Result<()> {\n        unimplemented!()\n    }\n\n    // will_save / will_save_wait_until\n\n    pub async fn text_document_did_save(&mut self) -> anyhow::Result<()> {\n        unimplemented!()\n    }\n}\n\nenum Payload {\n    Request {\n        chan: Sender<anyhow::Result<Value>>,\n        value: jsonrpc::MethodCall,\n    },\n    Notification(jsonrpc::Notification),\n}\n\nstruct Transport {\n    incoming: Sender<Message>,\n    outgoing: Receiver<Payload>,\n\n    pending_requests: HashMap<jsonrpc::Id, Sender<anyhow::Result<Value>>>,\n    headers: HashMap<String, String>,\n\n    writer: BufWriter<ChildStdin>,\n    reader: BufReader<ChildStdout>,\n}\n\nimpl Transport {\n    pub fn start(\n        ex: &Executor,\n        reader: BufReader<ChildStdout>,\n        writer: BufWriter<ChildStdin>,\n    ) -> (Receiver<Message>, Sender<Payload>) {\n        let (incoming, rx) = smol::channel::unbounded();\n        let (tx, outgoing) = smol::channel::unbounded();\n\n        let transport = Self {\n            reader,\n            writer,\n            incoming,\n            outgoing,\n            pending_requests: Default::default(),\n            headers: Default::default(),\n        };\n\n        ex.spawn(transport.duplex()).detach();\n\n        (rx, tx)\n    }\n\n    async fn recv(\n        reader: &mut (impl AsyncBufRead + Unpin),\n        headers: &mut HashMap<String, String>,\n    ) -> Result<Message, std::io::Error> {\n        // read headers\n        loop {\n            let mut header = String::new();\n            // detect pipe closed if 0\n            reader.read_line(&mut header).await?;\n            let header = header.trim();\n\n            if header.is_empty() {\n                break;\n            }\n\n            let parts: Vec<&str> = header.split(\": \").collect();\n            if parts.len() != 2 {\n                // return Err(Error::new(ErrorKind::Other, \"Failed to parse header\"));\n                panic!()\n            }\n            headers.insert(parts[0].to_string(), parts[1].to_string());\n        }\n\n        // find content-length\n        let content_length = headers.get(\"Content-Length\").unwrap().parse().unwrap();\n\n        let mut content = vec![0; content_length];\n        reader.read_exact(&mut content).await?;\n        let msg = String::from_utf8(content).unwrap();\n\n        // read data\n\n        // try parsing as output (server response) or call (server request)\n        let output: serde_json::Result<Message> = serde_json::from_str(&msg);\n\n        Ok(output?)\n    }\n\n    pub async fn send_payload(&mut self, payload: Payload) -> anyhow::Result<()> {\n        match payload {\n            Payload::Request { chan, value } => {\n                self.pending_requests.insert(value.id.clone(), chan);\n\n                let json = serde_json::to_string(&value)?;\n                self.send(json).await\n            }\n            Payload::Notification(value) => {\n                let json = serde_json::to_string(&value)?;\n                self.send(json).await\n            }\n        }\n    }\n\n    pub async fn send(&mut self, request: String) -> anyhow::Result<()> {\n        println!(\"-> {}\", request);\n\n        // send the headers\n        self.writer\n            .write_all(format!(\"Content-Length: {}\\r\\n\\r\\n\", request.len()).as_bytes())\n            .await?;\n\n        // send the body\n        self.writer.write_all(request.as_bytes()).await?;\n\n        self.writer.flush().await?;\n\n        Ok(())\n    }\n\n    pub async fn recv_response(&mut self, output: jsonrpc::Output) -> anyhow::Result<()> {\n        match output {\n            jsonrpc::Output::Success(jsonrpc::Success { id, result, .. }) => {\n                println!(\"<- {}\", result);\n\n                let tx = self\n                    .pending_requests\n                    .remove(&id)\n                    .expect(\"pending_request with id not found!\");\n                tx.send(Ok(result)).await?;\n            }\n            jsonrpc::Output::Failure(_) => panic!(\"recv fail\"),\n            msg => unimplemented!(\"{:?}\", msg),\n        }\n        Ok(())\n    }\n\n    pub async fn duplex(mut self) {\n        loop {\n            select! {\n                // client -> server\n                msg = self.outgoing.next().fuse() => {\n                    if msg.is_none() {\n                        break;\n                    }\n                    let msg = msg.unwrap();\n\n                    self.send_payload(msg).await.unwrap();\n                }\n                // server <- client\n                msg = Self::recv(&mut self.reader, &mut self.headers).fuse() => {\n                    if msg.is_err() {\n                        break;\n                    }\n                    let msg = msg.unwrap();\n\n                    match msg {\n                        Message::Output(output) => self.recv_response(output).await.unwrap(),\n                        Message::Notification(_) => {\n                            // dispatch\n                        }\n                        Message::Call(_) => {\n                            // dispatch\n                        }\n                    };\n                }\n            }\n        }\n    }\n}\n"}}}]
+Sun Oct 18 21:15:34 2020:[{"response": {"data": {"__data__": "vim-lsp", "server_name": "rust-analyzer"}, "message": "server already started"}}]
+Sun Oct 18 21:15:34 2020:[{"response": {"data": {"__data__": "vim-lsp", "init_result": {"id": 1, "jsonrpc": "2.0", "result": {"capabilities": {"documentHighlightProvider": true, "hoverProvider": true, "typeDefinitionProvider": true, "workspaceSymbolProvider": true, "referencesProvider": true, "signatureHelpProvider": {"triggerCharacters": ["(", ","]}, "foldingRangeProvider": true, "callHierarchyProvider": true, "codeActionProvider": {"codeActionKinds": ["", "quickfix", "refactor", "refactor.extract", "refactor.inline", "refactor.rewrite"]}, "textDocumentSync": {"save": {}, "change": 2, "openClose": true}, "codeLensProvider": {"resolveProvider": true}, "implementationProvider": true, "documentOnTypeFormattingProvider": {"moreTriggerCharacter": [".", ">"], "firstTriggerCharacter": "="}, "definitionProvider": true, "selectionRangeProvider": true, "semanticTokensProvider": {"legend": {"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"], "tokenModifiers": ["documentation", "declaration", "definition", "static", "abstract", "deprecated", "readonly", "constant", "controlFlow", "injected", "mutable", "unsafe", "attribute"]}, "documentProvider": true, "rangeProvider": true}, "documentFormattingProvider": true, "documentSymbolProvider": true, "experimental": {"parentModule": true, "onEnter": true, "runnables": {"kinds": ["cargo"]}, "ssr": true, "joinLines": true}, "renameProvider": {"prepareProvider": true}, "completionProvider": {"triggerCharacters": [":", "."]}}, "serverInfo": {"version": "???????", "name": "rust-analyzer"}}}, "server_name": "rust-analyzer"}, "message": "lsp server already initialized"}}]
+Sun Oct 18 21:15:34 2020:[{"response": {"data": {"__data__": "vim-lsp", "server_name": "rust-analyzer"}, "message": "configuration sent"}}]
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