Merge pull request #62 from bmish/windows-import

lib/config-resolution.ts

@@ -1,4 +1,5 @@
 import { existsSync } from 'node:fs';
+import { importAbs } from './import.js';
 import type { Plugin, Config, Rules, ConfigsToRules } from './types.js';
 
 /**
@@ -31,7 +32,7 @@ async function resolveConfigRules(config: Config): Promise<Rules> {
       continue;
     }
 
-    const { default: config } = await import(extend);
+    const { default: config } = await importAbs(extend);
     const nestedRules = await resolveConfigRules(config);
     Object.assign(rules, nestedRules);
   }

lib/import.ts

@@ -0,0 +1,10 @@
+import { pathToFileURL } from 'node:url';
+
+/**
+ * Ensure that we import absolute paths correctly in Windows.
+ * https://github.com/nodejs/node/issues/31710
+ */
+export function importAbs(path: string) {
+  const urlHref = pathToFileURL(path).href;
+  return import(urlHref);
+}

lib/package-json.ts

@@ -1,5 +1,6 @@
 import { join } from 'node:path';
 import { existsSync, readFileSync } from 'node:fs';
+import { importAbs } from './import.js';
 import type { Plugin } from './types.js';
 import type { PackageJson } from 'type-fest';
 
@@ -28,7 +29,7 @@ export async function loadPlugin(path: string): Promise<Plugin> {
     pluginPackageJson.main ?? 'index.js', // This is NPM's default value for this field.
     pluginPackageJson.main?.endsWith('/') ? 'index.js' : ''
   );
-  const { default: plugin } = await import(pluginEntryPoint);
+  const { default: plugin } = await importAbs(pluginEntryPoint);
   if (!plugin.rules) {
     throw new Error('Could not find exported `rules` object in ESLint plugin.');
   }