fixed an issue whereby files encoded with UTF8-BOM would cause imports to be skipped

__tests__/__fixtures__/import-utf8-bom.scss

@@ -0,0 +1 @@
+@import './utf8-bom';

__tests__/__fixtures__/two.scss

@@ -0,0 +1,3 @@
+.two {
+    display: block;
+}

__tests__/__fixtures__/utf8-bom.scss

@@ -0,0 +1 @@
+@import './two';

__tests__/utf8bom.test.js

@@ -0,0 +1,39 @@
+const fs = require('fs');
+const path = require('path');
+const assert = require('assert');
+
+const baka = require('../dist/index');
+const { mkdir, del } = require('../lib/utils');
+
+const dist = path.join(__dirname, 'dist');
+const fixtures = path.join(__dirname, '__fixtures__');
+
+
+describe.only('utf8bom', () => {
+
+    beforeAll(() => {
+        mkdir(dist);
+    });
+
+    describe('baka:full', () => {
+
+        test('source vs flat', () => {
+            // arrange
+            const src = path.join(fixtures, 'import-utf8-bom.scss');
+            const result = path.join(dist, 'import-utf8-bom-flat.scss');
+
+            del(result );
+
+            // act
+            baka.build(src, result);
+
+            // assert
+            const resultBuffer = fs.readFileSync(result);
+            const resultContent = resultBuffer.toString();
+
+            assert.equal(resultContent.indexOf('.two') >= 0, true);
+        });
+
+    });
+
+});

src/parse.ts

@@ -80,12 +80,15 @@ export function parse( file: string, options: SharedOptions ) {
         return '// File already imported_once. Skipping output.';
     }
     const buffer = fs.readFileSync(file, 'utf8');
+    // remove non-printing characters that can occur when reading a utf8-BOM file
+    const content = buffer.replace(/[\u200B-\u200D\uFEFF]/g, '');
+
     let output = '';
 
     importedPaths.push(path.dirname( file ));
     importedFiles.add( file );
 
-    output += buffer.replace(RE_IMPORT, ( match, filePath, annotation ) => {
+    output += content.replace(RE_IMPORT, ( match, filePath, annotation ) => {
         return importReplacer( match, filePath, annotation, options );
     });