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Copy pathhandler.ts
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241 lines (218 loc) · 7.06 KB
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// LSP message handler — dispatches JSON-RPC methods to DeepCode actions.
// Separated from server.ts for testability.
export interface LspMessage {
jsonrpc: '2.0';
id?: number | string | null;
method?: string;
params?: unknown;
result?: unknown;
error?: { code: number; message: string; data?: unknown };
}
export type SendFn = (msg: LspMessage) => void;
interface ServerState {
initialized: boolean;
/** Workspace root URI from initialize. */
rootUri?: string;
/** In-flight turn controllers so /abort cancels provider and tools. */
activeTurns: Map<string, AbortController>;
}
const state: ServerState = {
initialized: false,
activeTurns: new Map(),
};
const SERVER_INFO = {
name: 'deepcode-lsp',
version: '0.0.0',
};
export async function handleMessage(msg: LspMessage, send: SendFn): Promise<void> {
// Notifications (no id) — no response expected.
if (msg.id === undefined || msg.id === null) {
await handleNotification(msg, send);
return;
}
try {
const result = await dispatch(msg, send);
send({ jsonrpc: '2.0', id: msg.id, result });
} catch (err) {
const e = err as Error;
send({
jsonrpc: '2.0',
id: msg.id,
error: { code: -32603, message: e.message },
});
}
}
async function handleNotification(msg: LspMessage, _send: SendFn): Promise<void> {
switch (msg.method) {
case 'initialized':
state.initialized = true;
return;
case 'exit':
process.exit(state.initialized ? 0 : 1);
return;
default:
// Silently drop unknown notifications per LSP spec
return;
}
}
async function dispatch(msg: LspMessage, send: SendFn): Promise<unknown> {
switch (msg.method) {
case 'initialize':
return handleInitialize(msg.params as { rootUri?: string });
case 'shutdown':
return null;
case 'workspace/executeCommand':
return handleExecuteCommand(msg.params as ExecuteCommandParams, send);
default:
throw new Error(`Method not supported: ${msg.method ?? '<missing>'}`);
}
}
function handleInitialize(params: { rootUri?: string }): unknown {
state.rootUri = params?.rootUri;
return {
capabilities: {
// We don't implement any LSP language features; we use the protocol
// as a transport for our custom commands.
executeCommandProvider: {
commands: ['deepcode.runAgent', 'deepcode.abort', 'deepcode.listSkills'],
},
textDocumentSync: 0,
},
serverInfo: SERVER_INFO,
};
}
interface ExecuteCommandParams {
command: string;
arguments?: unknown[];
}
async function handleExecuteCommand(params: ExecuteCommandParams, send: SendFn): Promise<unknown> {
switch (params.command) {
case 'deepcode.runAgent':
return handleRunAgent((params.arguments?.[0] ?? {}) as { prompt?: string }, send);
case 'deepcode.abort':
return handleAbort((params.arguments?.[0] ?? {}) as { turnId?: string });
case 'deepcode.listSkills':
return handleListSkills();
default:
throw new Error(`Unknown command: ${params.command}`);
}
}
async function handleRunAgent(
args: { prompt?: string; model?: string },
send: SendFn,
): Promise<{ turnId: string }> {
if (!args.prompt) throw new Error('prompt is required');
const turnId = `lsp-${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 6)}`;
const abortController = new AbortController();
state.activeTurns.set(turnId, abortController);
// Stream events back via JSON-RPC notifications.
// Wired to the real agent loop — same code that drives the CLI / Mac client.
send({
jsonrpc: '2.0',
method: 'deepcode/agentEvent',
params: { turnId, kind: 'started', prompt: args.prompt },
});
// Run async; we return turnId immediately so the LSP client can
// call deepcode.abort while it's in-flight.
void (async () => {
try {
const [
{ RuntimeHost },
{ DeepSeekProvider },
{ ToolRegistry, BUILTIN_TOOLS, SAFE_READONLY_TOOLS },
{ resolveCredentials, CredentialsStore },
] = await Promise.all([
import('@deepcode/core').then((m) => ({ RuntimeHost: m.RuntimeHost })),
import('@deepcode/core').then((m) => ({ DeepSeekProvider: m.DeepSeekProvider })),
import('@deepcode/core').then((m) => ({
ToolRegistry: m.ToolRegistry,
BUILTIN_TOOLS: m.BUILTIN_TOOLS,
SAFE_READONLY_TOOLS: m.SAFE_READONLY_TOOLS,
})),
import('@deepcode/core').then((m) => ({
resolveCredentials: m.resolveCredentials,
CredentialsStore: m.CredentialsStore,
})),
]);
const creds = await resolveCredentials({ store: new CredentialsStore() });
if (!creds.apiKey && !creds.authToken) {
throw new Error(
'No DeepSeek credentials. Run `deepcode` once to onboard, or set DEEPSEEK_API_KEY.',
);
}
const provider = new DeepSeekProvider({
apiKey: creds.apiKey ?? '',
authToken: creds.authToken,
baseURL: creds.baseURL,
});
const runtime = new RuntimeHost({
provider,
tools: new ToolRegistry(BUILTIN_TOOLS),
cwd: state.rootUri ? new URL(state.rootUri).pathname : process.cwd(),
mode: 'default',
permissions: { allow: [...SAFE_READONLY_TOOLS] },
});
const result = await runtime.run({
systemPrompt: 'You are DeepCode, an AI coding assistant powered by DeepSeek. Be concise.',
userMessage: args.prompt!,
model: args.model ?? 'deepseek-chat',
signal: abortController.signal,
onEvent: (e) => {
send({
jsonrpc: '2.0',
method: 'deepcode/agentEvent',
params: { turnId, kind: e.type, ...e },
});
},
});
send({
jsonrpc: '2.0',
method: 'deepcode/agentEvent',
params: { turnId, kind: 'turn_done', stopReason: result.stopReason },
});
} catch (err) {
send({
jsonrpc: '2.0',
method: 'deepcode/agentEvent',
params: {
turnId,
kind: 'error',
error: (err as Error).message ?? String(err),
},
});
send({
jsonrpc: '2.0',
method: 'deepcode/agentEvent',
params: { turnId, kind: 'turn_done', stopReason: 'error' },
});
} finally {
state.activeTurns.delete(turnId);
}
})();
return { turnId };
}
function handleAbort(args: { turnId?: string }): { aborted: boolean } {
if (!args.turnId) throw new Error('turnId is required');
const controller = state.activeTurns.get(args.turnId);
if (!controller) return { aborted: false };
controller.abort();
return { aborted: true };
}
async function handleListSkills(): Promise<{ skills: unknown[] }> {
// Lazy import so server.ts type-checks without @deepcode/core resolved.
const { loadSkills } = await import('@deepcode/core');
const skills = await loadSkills({ cwd: process.cwd() });
return {
skills: skills.map((s) => ({
name: s.qualifiedName,
description: s.frontmatter.description,
source: s.source,
path: s.path,
})),
};
}
// Test exports
export const __test = {
state,
dispatch,
};