fix(conf): lazy load cosmiconfig's TypeScriptLoader (#1403)

Author: Timofey

packages/conf/package.json

@@ -34,5 +34,17 @@
   ],
   "devDependencies": {
     "ts-node": "^10.9.1"
+  },
+  "peerDependencies": {
+    "ts-node": ">=10",
+    "typescript": ">=4"
+  },
+  "peerDependenciesMeta": {
+    "ts-node": {
+      "optional": true
+    },
+    "typescript": {
+      "optional": true
+    }
   }
 }

packages/conf/src/index.ts

@@ -2,9 +2,8 @@ import type { GeneratorOptions } from "@babel/core"
 import path from "path"
 import fs from "fs"
 import chalk from "chalk"
-import { cosmiconfigSync } from "cosmiconfig"
+import { cosmiconfigSync, type LoaderSync } from "cosmiconfig"
 import { multipleValidOptions, validate } from "jest-validate"
-import { TypeScriptLoader } from "cosmiconfig-typescript-loader";
 
 export type CatalogFormat = "lingui" | "minimal" | "po" | "csv"
 
@@ -104,6 +103,19 @@ function configExists(path) {
   return path && fs.existsSync(path)
 }
 
+function TypeScriptLoader(): LoaderSync {
+  let loaderInstance: LoaderSync
+  return (filepath, content) => {
+    if (!loaderInstance) {
+      const { TypeScriptLoader } =
+        require("cosmiconfig-typescript-loader") as typeof import("cosmiconfig-typescript-loader")
+      loaderInstance = TypeScriptLoader()
+    }
+
+    return loaderInstance(filepath, content)
+  }
+}
+
 export function getConfig({
   cwd,
   configPath,