Update

fetch_static_files.ts

@@ -0,0 +1,41 @@
+import { dirname, join } from "std/path/mod.ts";
+import { sure_dir } from "./utils.ts";
+
+const map = JSON.parse(await Deno.readTextFile("./import_map.json")).imports;
+const LIST: string[] = ["preact-material-components/TopAppBar/style.css"];
+
+function get_url(i: string) {
+    for (const v of Object.getOwnPropertyNames(map)) {
+        if (v.endsWith("/") && i.startsWith(v)) {
+            return i.replace(v, map[v]);
+        }
+    }
+    for (const v of Object.getOwnPropertyNames(map)) {
+        if (i.startsWith(v)) {
+            return i.replace(v, map[v]);
+        }
+    }
+    return i;
+}
+
+async function fetch_file(u: string | URL, p: string) {
+    await sure_dir(dirname(p));
+    const f = await Deno.open(p, { create: true, write: true, truncate: true });
+    try {
+        const r = await fetch(u);
+        if (!r.body) throw Error("No body.");
+        await r.body.pipeTo(f.writable);
+    } finally {
+        try {
+            f.close();
+        } catch (_) {
+            null;
+        }
+    }
+}
+
+for (const i of LIST) {
+    const u = get_url(i);
+    const p = join("./static", i);
+    await fetch_file(u, p);
+}