[bin] Fix the cmd-ts guard forrealz.

`node` semantics make this really annoying, as the import resolution gets aggressively hoisted above any other code, even if that other code contains a dynamic import.

script/test/src/import-restrictions/allowedImports.ts

@@ -41,12 +41,11 @@ export const mainAllowedImports: AllowedImports = {
   },
   // src/bin
   "src/bin": {
-    static: ["cubing", "cmd-ts"],
-  },
-  "src/bin/scramble.ts": {
-    static: ["cmd-ts", "src/cubing"],
+    static: ["cubing"],
+    dynamic: ["cmd-ts"],
   },
   "src/bin/guards/cmd-ts-guard.ts": {
+    static: ["node:process"],
     dynamic: ["cmd-ts"],
   },
   // src/lib

src/bin/guards/cmd-ts-guard.ts

@@ -1,8 +1,10 @@
+import { exit } from "node:process";
+
 try {
   await import("cmd-ts");
 } catch (e) {
   // Note that this doesn't fail when installed using `bun install --global`, as `bun` automatically loads deps.
-  throw new Error(
+  console.error(
     `Could not import \`cmd-ts\`. This is not automatically installed as a regular dependency of \`cubing\`.
 
 If you are installing globally, consider using \`bun\`: https://bun.sh/
@@ -18,6 +20,5 @@ If you are using \`npx\` within a repo, run:
     npm install cubing cmd-ts
 `,
   );
+  exit(1);
 }
-
-export {};

src/bin/order.ts

@@ -1,19 +1,22 @@
 // To run this file directly:
 // bun run src/bin/order.ts -- 3x3x3 "R U R' U R U2' R'"
 
-import {
-  binary,
-  string as cmdString,
-  command,
-  positional,
-  run,
-  type Type,
-} from "cmd-ts";
 import { Alg } from "cubing/alg";
 import { KPuzzle } from "cubing/kpuzzle";
 import { getPuzzleGeometryByName } from "cubing/puzzle-geometry";
 import { puzzles } from "cubing/puzzles";
 
+import type { Type } from "cmd-ts";
+import "./guards/cmd-ts-guard";
+
+const {
+  binary,
+  string: cmdString,
+  command,
+  positional,
+  run,
+} = await import("cmd-ts");
+
 // TODO: dedup with `screenshot` implementation.
 const ReadAlg: Type<string, Alg> = {
   async from(str) {

src/bin/scramble.ts

@@ -4,24 +4,25 @@
 // TODO: completions for `bash`, `zsh`, and `fish`: https://github.com/loilo/completarr
 
 // Important! We import this instead of inlining, because `esbuild` preserves import order semantics but hoists imports above any code inlined here.
+
+import type { Alg } from "cubing/alg";
+import { eventInfo } from "cubing/puzzles";
+import { randomScrambleForEvent } from "cubing/scramble";
+import { setSearchDebug } from "cubing/search";
 import "./guards/cmd-ts-guard";
 
-import {
+const {
   binary,
-  number as cmdNumber,
-  string as cmdString,
+  number: cmdNumber,
+  string: cmdString,
   command,
   flag,
   oneOf,
   option,
   optional,
   positional,
   run,
-} from "cmd-ts";
-import type { Alg } from "cubing/alg";
-import { eventInfo } from "cubing/puzzles";
-import { randomScrambleForEvent } from "cubing/scramble";
-import { setSearchDebug } from "cubing/search";
+} = await import("cmd-ts");
 
 // TODO: file an issue about printing these values.
 const outputFormats = ["text", "link", "json-text"] as const;