Generate asset versions during Docker builds

2026-07-30 18:37:39 -04:00
parent eec422661b
commit 1a63da77f3
23 changed files with 128 additions and 87 deletions
@@ -0,0 +1,39 @@
+import { createHash } from "node:crypto";
+import { readFile, writeFile, readdir } from "node:fs/promises";
+import path from "node:path";
+
+const PLACEHOLDER = "__ASSET_VERSION__";
+const root = path.resolve(process.argv[2] || process.cwd());
+const assetRoots = ["public", "shared"];
+
+async function walk(directory) {
+	const entries = await readdir(directory, { withFileTypes: true });
+	const files = await Promise.all(
+		entries.map((entry) => {
+			const target = path.join(directory, entry.name);
+			return entry.isDirectory() ? walk(target) : target;
+		}),
+	);
+	return files.flat().sort();
+}
+
+const files = (
+	await Promise.all(assetRoots.map((directory) => walk(path.join(root, directory))))
+).flat();
+const sources = await Promise.all(files.map((file) => readFile(file, "utf8")));
+const version = createHash("sha256")
+	.update(files.map((file, index) => `${path.relative(root, file)}\0${sources[index]}`).join("\0"))
+	.digest("hex")
+	.slice(0, 16);
+let replacements = 0;
+await Promise.all(
+	files.map(async (file, index) => {
+		const source = sources[index];
+		const count = source.split(PLACEHOLDER).length - 1;
+		if (!count) return;
+		replacements += count;
+		await writeFile(file, source.replaceAll(PLACEHOLDER, version));
+	}),
+);
+if (!replacements) throw new Error(`No ${PLACEHOLDER} markers found under ${assetRoots.join(", ")}.`);
+console.log(`Stamped ${replacements} asset references with version ${version}.`);