fix(alias): paths for aliases across multiple Windows drives (#896)

Removing the drive letter while normalizing the ID was actually breaking the absolute import across multiple Windows drives.

Author: Robinfr

packages/alias/src/index.ts

@@ -1,13 +1,7 @@
-import { platform } from 'os';
-
 import { PartialResolvedId, Plugin } from 'rollup';
-import slash from 'slash';
 
 import { Alias, ResolverFunction, RollupAliasOptions } from '../types';
 
-const VOLUME = /^([A-Z]:)/i;
-const IS_WINDOWS = platform() === 'win32';
-
 const noop = () => null;
 
 function matches(pattern: string | RegExp, importee: string) {
@@ -28,9 +22,6 @@ function matches(pattern: string | RegExp, importee: string) {
 function normalizeId(id: string): string;
 function normalizeId(id: string | undefined): string | undefined;
 function normalizeId(id: string | undefined) {
-  if (typeof id === 'string' && (IS_WINDOWS || VOLUME.test(id))) {
-    return slash(id.replace(VOLUME, ''));
-  }
   return id;
 }
 

packages/alias/test/test.js

@@ -2,14 +2,13 @@ import path, { posix } from 'path';
 
 import test from 'ava';
 import { rollup } from 'rollup';
-import slash from 'slash';
 
 // eslint-disable-next-line import/no-unresolved, import/extensions
 import nodeResolvePlugin from '@rollup/plugin-node-resolve';
 
 import alias from '../dist';
 
-const normalizePath = (pathToNormalize) => slash(pathToNormalize.replace(/^([A-Z]:)/, ''));
+const normalizePath = (pathToNormalize) => pathToNormalize;
 const DIRNAME = normalizePath(__dirname);
 
 /**