Revert "Support ESM and .mts/.cts config extensions (#1281)" (#1285)

This reverts commit f6cfa2c.

Author: beerose

src/helpers/cosmiconfig.ts

@@ -1,9 +1,4 @@
-import { execSync } from 'child_process';
 import { cosmiconfig, cosmiconfigSync, Loader, defaultLoaders } from 'cosmiconfig';
-import { createHash } from 'crypto';
-import { promises } from 'fs';
-import { tmpdir } from 'os';
-import { basename, join } from 'path';
 import { env } from 'string-env-interpolation';
 
 export interface ConfigSearchResult {
@@ -44,70 +39,12 @@ export function createCosmiConfigSync(moduleName: string, legacy: boolean) {
   return cosmiconfigSync(moduleName, options);
 }
 
-const loadTypeScript: Loader = async (filepath, content) => {
-  try {
-    // eslint-disable-next-line @typescript-eslint/no-var-requires
-    const { TypeScriptLoader } = require('cosmiconfig-typescript-loader');
-    return TypeScriptLoader({ transpileOnly: true })(filepath, content);
-  } catch (err) {
-    if (isRequireESMError(err)) {
-      const hash = createHash('sha256').update(content).digest('base64url');
-
-      const tempDir = join(tmpdir(), `graphql-config`);
-
-      let inTempDir: string[] = [];
-      try {
-        inTempDir = await promises.readdir(tempDir);
-      } catch (err) {
-        if (err.code === 'ENOENT') {
-          // tsc will create the directory if it doesn't exist.
-        } else {
-          throw err;
-        }
-      }
-
-      let outDir = join(tempDir, new Date().getTime() + '-' + hash);
-      const previousOutDir = inTempDir.find((s) => s.endsWith(hash));
-
-      if (previousOutDir) {
-        outDir = join(tempDir, previousOutDir);
-      } else {
-        // We're compiling the file, because ts-node doesn't work perfectly with ESM.
-        execSync(`tsc ${filepath} --module commonjs --outDir ${outDir} --skipLibCheck`);
-      }
-
-      const newPath = join(outDir, basename(filepath).replace(/\.(m|c)?ts$/, '.js'));
-      const config = import(newPath).then((m) => {
-        const config = m.default;
-        return 'default' in config ? config.default : config;
-      });
-
-      // If the cache has more than 10 files, we delete the oldest one.
-      await removeOldestDirInCache(inTempDir, tempDir, 10);
-
-      return config;
-    }
-    throw err;
-  }
+const loadTypeScript: Loader = (...args) => {
+  // eslint-disable-next-line @typescript-eslint/no-var-requires
+  const { TypeScriptLoader } = require('cosmiconfig-typescript-loader');
+  return TypeScriptLoader({ transpileOnly: true })(...args);
 };
 
-async function removeOldestDirInCache(inTempDir: string[], tempDir: string, cacheLimit: number) {
-  if (inTempDir.length > cacheLimit) {
-    const oldest = inTempDir.sort((a, b) => {
-      const aTime = Number(a.split('-')[0]);
-      const bTime = Number(b.split('-')[0]);
-
-      return aTime - bTime;
-    })[0];
-
-    await promises.rm(join(tempDir, oldest), { recursive: true, force: true });
-  }
-}
-
-function isRequireESMError(err: any) {
-  return typeof err.stack === 'string' && err.stack.startsWith('Error [ERR_REQUIRE_ESM]:');
-}
-
 const loadToml: Loader = (...args) => {
   // eslint-disable-next-line @typescript-eslint/no-var-requires
   const { loadToml } = require('cosmiconfig-toml-loader');
@@ -146,8 +83,6 @@ function prepareCosmiconfig(moduleName: string, legacy: boolean) {
     searchPlaces: searchPlaces.map((place) => place.replace('#', moduleName)),
     loaders: {
       '.ts': loadTypeScript,
-      '.mts': loadTypeScript,
-      '.cts': loadTypeScript,
       '.js': defaultLoaders['.js'],
       '.json': createCustomLoader(defaultLoaders['.json']),
       '.yaml': loadYaml,