Make Camino examples and scaffolds complete Yarn and Nix packages

2026-09-22 14:42:54 -07:00
parent 0da022e216
commit f34ce87f55
8 changed files with 172 additions and 20 deletions
@@ -0,0 +1,61 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { createHash } from "node:crypto";
+
+async function packages(directory) {
+  const result = new Map();
+  for (const entry of await fs.readdir(directory)) {
+    if (entry.startsWith(".")) continue;
+    if (entry.startsWith("@")) {
+      for (const name of await fs.readdir(path.join(directory, entry)))
+        result.set(`${entry}/${name}`, path.join(directory, entry, name));
+    } else result.set(entry, path.join(directory, entry));
+  }
+  return result;
+}
+async function packageDigest(directory) {
+  const digest = createHash("sha256");
+  async function visit(relative) {
+    for (const entry of (await fs.readdir(path.join(directory, relative), { withFileTypes: true })).sort((a, b) =>
+      a.name.localeCompare(b.name),
+    )) {
+      if (entry.name === "node_modules") continue;
+      const name = path.join(relative, entry.name),
+        file = path.join(directory, name);
+      if (entry.isDirectory()) await visit(name);
+      else {
+        const bytes = await fs.readFile(file);
+        digest.update(JSON.stringify([name, bytes.length]));
+        digest.update(bytes);
+      }
+    }
+  }
+  await visit("");
+  return digest.digest("hex");
+}
+/** Merge at package granularity: a scope such as @types is not a reserved package. */
+export async function installDependencies({ destination, application, defaults = [], selected = {}, reserved = [] }) {
+  const entries = new Map();
+  const authored = new Set();
+  for (const root of defaults) for (const [name, file] of await packages(root)) entries.set(name, file);
+  for (const [name, file] of Object.entries(selected)) entries.set(name, file);
+  if (application)
+    for (const [name, file] of await packages(application)) {
+      if (reserved.includes(name)) {
+        const canonical = entries.get(name);
+        if (!canonical || (await packageDigest(file)) !== (await packageDigest(canonical)))
+          throw Error("Application dependencies cannot substitute selected React/client types or checked SDK: " + name);
+      } else {
+        entries.set(name, file);
+        authored.add(name);
+      }
+    }
+  for (const [name, file] of entries) {
+    await fs.mkdir(path.dirname(path.join(destination, name)), { recursive: true });
+    // Application packages resolve siblings from this assembled node_modules.
+    // Keep SDK links canonical: copying those would duplicate branded types and
+    // React declarations from their own retained dependency closures.
+    if (authored.has(name)) await fs.cp(file, path.join(destination, name), { recursive: true, dereference: true });
+    else await fs.symlink(file, path.join(destination, name));
+  }
+}