feat: Add support for regex matches in to templates

README.md

@@ -138,6 +138,9 @@ Or, in case of just a `from` with the default destination, you can also use a `{
       from: 'src/'
       to: 'dest/[name].[hash].[ext]',
       toType: 'template'
+      // Optional: provide a regExp to extract additional placeholders
+      // See: https://github.com/webpack-contrib/file-loader#regexp
+      toRegExp: /\/([a-z0-9]+)\/[a-z0-9]+\.png$/,
     }
   ], options)
 ]

src/processPattern.js

@@ -72,6 +72,7 @@ export default function processPattern(globalRef, pattern) {
                 file.webpackTo = pattern.to || file.relativeFrom;
             } else if (pattern.toType === 'template') {
                 file.webpackTo = pattern.to;
+                file.webpackToRegExp = pattern.toRegExp;
             }
 
             if (path.isAbsolute(file.webpackTo)) {

src/writeFile.js

@@ -91,7 +91,7 @@ export default function writeFile(globalRef, pattern, file) {
                 file.webpackTo = loaderUtils.interpolateName(
                     {resourcePath: file.relativeFrom},
                     file.webpackTo,
-                    {content});
+                    {content, regExp: file.webpackToRegExp});
 
                 // Add back removed dots
                 if (dotRemoved) {

tests/index.js

@@ -441,6 +441,23 @@ describe('apply function', () => {
             .then(done)
             .catch(done);
         });
+
+        it('can flatten or normalize glob matches', (done) => {
+            runEmit({
+                expectedAssetKeys: [
+                    '[special?directory]-(special-*file).txt',
+                    '[special?directory]-directoryfile.txt',
+                    'directory-directoryfile.txt'
+                ],
+                patterns: [{
+                    from: '*/*.*',
+                    toRegExp: /^([^\/]+)\/(.+)\.\w+$/,
+                    to: '[1]-[2].[ext]'
+                }]
+            })
+            .then(done)
+            .catch(done);
+        });
     });
 
     describe('with file in from', () => {