refactor: extract shared install and embedding utilities

src/infra/install-source-utils.ts

@@ -0,0 +1,78 @@
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { runCommandWithTimeout } from "../process/exec.js";
+import { resolveUserPath } from "../utils.js";
+import { fileExists, resolveArchiveKind } from "./archive.js";
+
+export async function withTempDir<T>(
+  prefix: string,
+  fn: (tmpDir: string) => Promise<T>,
+): Promise<T> {
+  const tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), prefix));
+  try {
+    return await fn(tmpDir);
+  } finally {
+    await fs.rm(tmpDir, { recursive: true, force: true }).catch(() => undefined);
+  }
+}
+
+export async function resolveArchiveSourcePath(archivePath: string): Promise<
+  | {
+      ok: true;
+      path: string;
+    }
+  | {
+      ok: false;
+      error: string;
+    }
+> {
+  const resolved = resolveUserPath(archivePath);
+  if (!(await fileExists(resolved))) {
+    return { ok: false, error: `archive not found: ${resolved}` };
+  }
+
+  if (!resolveArchiveKind(resolved)) {
+    return { ok: false, error: `unsupported archive: ${resolved}` };
+  }
+
+  return { ok: true, path: resolved };
+}
+
+export async function packNpmSpecToArchive(params: {
+  spec: string;
+  timeoutMs: number;
+  cwd: string;
+}): Promise<
+  | {
+      ok: true;
+      archivePath: string;
+    }
+  | {
+      ok: false;
+      error: string;
+    }
+> {
+  const res = await runCommandWithTimeout(["npm", "pack", params.spec, "--ignore-scripts"], {
+    timeoutMs: Math.max(params.timeoutMs, 300_000),
+    cwd: params.cwd,
+    env: {
+      COREPACK_ENABLE_DOWNLOAD_PROMPT: "0",
+      NPM_CONFIG_IGNORE_SCRIPTS: "true",
+    },
+  });
+  if (res.code !== 0) {
+    return { ok: false, error: `npm pack failed: ${res.stderr.trim() || res.stdout.trim()}` };
+  }
+
+  const packed = (res.stdout || "")
+    .split("\n")
+    .map((line) => line.trim())
+    .filter(Boolean)
+    .pop();
+  if (!packed) {
+    return { ok: false, error: "npm pack produced no archive" };
+  }
+
+  return { ok: true, archivePath: path.join(params.cwd, packed) };
+}