fix(lsp): address lifecycle review feedback

2026-07-17 16:32:34 +08:00
parent e92ec69f32
commit a5c7732592
17 changed files with 585 additions and 97 deletions
@@ -0,0 +1,57 @@
+import { resolve } from 'node:path'
+import { pathToFileURL } from 'node:url'
+
+let buffered = Buffer.alloc(0)
+
+function frame(message) {
+  const body = Buffer.from(JSON.stringify({ jsonrpc: '2.0', ...message }))
+  return Buffer.concat([Buffer.from(`Content-Length: ${body.length}\r\n\r\n`), body])
+}
+
+function location(line) {
+  return {
+    uri: pathToFileURL(resolve('subject.ts')).href,
+    range: { start: { line, character: 6 }, end: { line, character: 12 } },
+  }
+}
+
+function handle(message) {
+  switch (message.method) {
+    case 'initialize':
+      process.stdout.write(frame({
+        id: message.id,
+        result: {
+          capabilities: {
+            positionEncoding: 'utf-16',
+            textDocumentSync: 1,
+            definitionProvider: true,
+          },
+        },
+      }))
+      break
+    case 'textDocument/definition':
+      process.stdout.write(frame({ id: message.id, result: [location(0), location(1)] }))
+      break
+    case 'shutdown':
+      process.stdout.write(frame({ id: message.id, result: null }))
+      break
+    case 'exit':
+      process.exit(0)
+  }
+}
+
+process.stdin.on('data', (chunk) => {
+  buffered = Buffer.concat([buffered, chunk])
+  for (;;) {
+    const headerEnd = buffered.indexOf('\r\n\r\n')
+    if (headerEnd < 0) return
+    const match = /Content-Length: (\d+)/i.exec(buffered.toString('ascii', 0, headerEnd))
+    if (match === null) throw new Error('missing Content-Length')
+    const length = Number(match[1])
+    const bodyStart = headerEnd + 4
+    if (buffered.length < bodyStart + length) return
+    const message = JSON.parse(buffered.toString('utf8', bodyStart, bodyStart + length))
+    buffered = buffered.subarray(bodyStart + length)
+    handle(message)
+  }
+})
@@ -0,0 +1,2 @@
+export const answer = 42
+console.log(answer)