Add support for partial aliases

Author: frostney

src/index.js

@@ -8,23 +8,26 @@ export default function alias(options = {}) {
       }
 
       const aliasKeys = Object.keys(options);
-      const aliasIndex = aliasKeys.indexOf(importee);
+      // TODO: We shouldn't have a case of double aliases. But may need to handle that better
+      const filteredAlias = aliasKeys.filter(value => importee.indexOf(value) === 0)[0];
 
-      if (aliasIndex >= 0) {
-        const entry = options[aliasKeys[aliasIndex]];
+      if (!filteredAlias) {
+        return null;
+      }
+
+      const entry = options[filteredAlias];
 
-        if (entry.indexOf('./') === 0) {
-          const basename = path.basename(importer);
-          const directory = importer.split(basename)[0];
+      const updatedId = importee.replace(filteredAlias, entry);
 
-          // TODO: Is there a way not to have the extension being defined explicitly?
-          return path.resolve(directory, entry) + '.js';
-        }
+      if (updatedId.indexOf('./') === 0) {
+        const basename = path.basename(importer);
+        const directory = importer.split(basename)[0];
 
-        return entry;
+        // TODO: Is there a way not to have the extension being defined explicitly?
+        return path.resolve(directory, updatedId) + '.js';
       }
 
-      return null;
+      return updatedId;
     },
   };
 }

test/files/folder/anotherNumber.js

@@ -0,0 +1 @@
+export default 33;

test/files/index.js

@@ -1,5 +1,7 @@
 import nonAliased from './nonAliased';
 import fancyNumber from 'fancyNumber';
 import anotherFancyNumber from './anotherFancyNumber';
+import anotherNumber from './numberFolder/anotherNumber';
+import moreNumbers from 'numberFolder/anotherNumber';
 
-export default fancyNumber + anotherFancyNumber + nonAliased;
+export default fancyNumber + anotherFancyNumber + nonAliased + anotherNumber + moreNumbers;

test/index.js

@@ -11,12 +11,15 @@ test(t =>
     plugins: [alias({
       fancyNumber: './aliasMe',
       './anotherFancyNumber': './localAliasMe',
+      numberFolder: './folder',
+      './numberFolder': './folder',
     })],
   }).then(stats => {
     t.is(path.basename(stats.modules[0].id), 'nonAliased.js');
     t.is(path.basename(stats.modules[1].id), 'aliasMe.js');
     t.is(path.basename(stats.modules[2].id), 'localAliasMe.js');
-    t.is(path.basename(stats.modules[3].id), 'index.js');
-    t.is(stats.modules.length, 4);
+    t.is(path.basename(stats.modules[3].id), 'anotherNumber.js');
+    t.is(path.basename(stats.modules[4].id), 'index.js');
+    t.is(stats.modules.length, 5);
   })
 );