expose the resolve option

Author: Alexey Litvinov

README.md

@@ -264,6 +264,20 @@ Provides additional hash uniqueness. Might be useful for projects with several s
 
 Short alias for the [postcss-modules-local-by-default](https://github.com/css-modules/postcss-modules-local-by-default) plugin's option.
 
+
+### `resolve` object
+
+Changes the way the paths of ICSS imports will be resolved (`@value a from './b.css'` and `composes a from './b.css'`). Supports:
+
+- `resolve.alias` `object`
+- `resolve.extensions` `array` — default value is `['.css']`.
+- `resolve.modules` `array`
+- `resolve.mainFile` `array` — default value is `'index.css'`.
+- `resolve.preserveSymlinks` `boolean` — default value is `false`.
+
+See the detailed description at: https://github.com/css-modules/postcss-modules-resolve-imports#options
+
+
 ### `rootDir` string
 
 Provides absolute path to the project directory. Providing this will result in better generated class names. It can be obligatory, if you run require hook and build tools (like [css-modulesify](https://github.com/css-modules/css-modulesify)) from different working directories.

src/index.js

@@ -34,6 +34,7 @@ module.exports = function setupHook({
   generateScopedName,
   hashPrefix,
   mode,
+  resolve: resolveOpts,
   use,
   rootDir: context = process.cwd(),
 }) {
@@ -67,7 +68,7 @@ module.exports = function setupHook({
       ? new ExtractImports({createImportedName})
       : ExtractImports,
     new Scope({generateScopedName: scopedName}),
-    new ResolveImports({resolve: {extensions: exts}}),
+    new ResolveImports({resolve: Object.assign({}, {extensions: exts}, resolveOpts)}),
     ...append,
   ];
 

src/validate.js

@@ -29,6 +29,7 @@ const rules = {
   generateScopedName: 'function|string',
   hashPrefix: 'string',
   mode: 'string',
+  resolve: 'object',
   rootDir: 'string',
 };
 

test/api/fixture/shortcuts.css

@@ -0,0 +1,4 @@
+.color
+{
+  composes: color from 'oceanic';
+}

test/api/resolve.js

@@ -0,0 +1,23 @@
+const {detachHook, dropCache} = require('../sugar');
+const path = require('path');
+
+suite('api/resolve', () => {
+  test('should be called', () => {
+    const tokens = require('./fixture/shortcuts.css');
+
+    assert.deepEqual(tokens, {
+      color: '_test_api_fixture_shortcuts__color _test_api_fixture_oceanic__color',
+    });
+  });
+
+  setup(() => {
+    hook({resolve: {
+      modules: [path.join(__dirname, 'fixture')],
+    }});
+  });
+
+  teardown(() => {
+    detachHook('.css');
+    dropCache('./api/fixture/oceanic.css');
+  });
+});