Move the action from Deno to Node.js and Vite+

src/agent-claude.ts

@@ -0,0 +1,119 @@
+// Runs Claude Code for one profile and returns its final result text.
+import { createInterface } from "node:readline";
+import type { Readable } from "node:stream";
+
+import { isClaudeAuthFailure } from "./auth.ts";
+import type { ClaudeFailureFields } from "./auth.ts";
+import { chunks } from "./command.ts";
+import { agentCommand } from "./isolation.ts";
+import { isObject } from "./json.ts";
+import type { JsonObject } from "./json.ts";
+import { AgentAuthError, agentEnvironment } from "./profiles.ts";
+import { PROCESS_ENV, WORKSPACE } from "./run-context.ts";
+import type { RuntimeProfile } from "./runtime.ts";
+
+// Claude Code's stream-json `result` event, in its own field names.
+type ClaudeResult = ClaudeFailureFields &
+  Partial<Record<"is_error", boolean>> & {
+    subtype: string;
+  };
+
+// Echoes stderr as it arrives and resolves with all of it.
+async function copyError(stream: Readable): Promise<string> {
+  const decoder = new TextDecoder();
+  let error = "";
+  for await (const chunk of chunks(stream)) {
+    const text = decoder.decode(chunk, { stream: true });
+    error += text;
+    console.error(text);
+  }
+  return error + decoder.decode();
+}
+
+// Prints the visible text of each streamed message part.
+function printParts(event: JsonObject): void {
+  const content = isObject(event.message) ? event.message.content : undefined;
+  for (const part of Array.isArray(content) ? content : []) {
+    if (isObject(part)) {
+      const text = part.thinking ?? part.text ?? part.name;
+      if (typeof text === "string" && text !== "") {
+        console.log(text);
+      }
+    }
+  }
+}
+
+function toResult(event: JsonObject): ClaudeResult {
+  const { is_error: isError, result, subtype, api_error_status: apiErrorStatus } = event;
+  return {
+    ...(typeof isError === "boolean" && { is_error: isError }),
+    ...(typeof result === "string" && { result }),
+    subtype: String(subtype),
+    ...((typeof apiErrorStatus === "number" || apiErrorStatus === null) && {
+      api_error_status: apiErrorStatus,
+    }),
+  };
+}
+
+// Prints each streamed message part and returns the final `result` event.
+async function readEvents(stream: Readable): Promise<ClaudeResult | undefined> {
+  let result: ClaudeResult | undefined;
+  for await (const line of createInterface({ input: stream, crlfDelay: Infinity })) {
+    if (line !== "") {
+      const event: unknown = JSON.parse(line);
+      if (isObject(event)) {
+        printParts(event);
+        if (event.type === "result") {
+          result = toResult(event);
+        }
+      }
+    }
+  }
+  return result;
+}
+
+function checkResult(result: ClaudeResult | undefined, error: string): string {
+  if (result?.is_error === true) {
+    const failure = new Error(result.result ?? `claude ended with ${result.subtype}`);
+    if (isClaudeAuthFailure(result)) {
+      throw new AgentAuthError("claude sign-in failed", { cause: failure });
+    }
+    throw failure;
+  }
+  if (result?.result === undefined) {
+    throw new Error(error.trim() || `claude ended with ${result?.subtype ?? "no result"}`);
+  }
+  return result.result;
+}
+
+export async function runClaude(
+  profile: RuntimeProfile,
+  token: string,
+  prompt: string,
+): Promise<string> {
+  const args = [
+    "--print",
+    "--dangerously-skip-permissions",
+    "--model",
+    profile.model,
+    "--output-format",
+    "stream-json",
+    "--verbose",
+    prompt,
+  ];
+  const claude = agentCommand(profile, "claude", args, {
+    cwd: WORKSPACE,
+    env: { ...agentEnvironment(PROCESS_ENV, profile, token), IS_SANDBOX: "1" },
+    clearEnv: true,
+    stdout: "piped",
+    stderr: "piped",
+  }).spawn();
+  const errorText = copyError(claude.stderr);
+  const result = await readEvents(claude.stdout);
+  const [status, error] = await Promise.all([claude.status, errorText]);
+  const body = checkResult(result, error);
+  if (!status.success) {
+    throw new Error(error.trim() || `claude exited with ${status.code}`);
+  }
+  return body;
+}