feat: support dart-sass

Author: wmzy

Diff for: src/transformers/scss.js

@@ -1,4 +1,5 @@
-const sass = require('node-sass')
+const {requireAny} = require('../utils')
+const sass = requireAny('node-sass', 'sass')
 
 const { getIncludePaths } = require('../utils.js')
 

Diff for: src/utils.js

@@ -76,3 +76,12 @@ exports.runTransformer = (name, options, { content, filename }) => {
     throwError(`Error transforming '${name}'. Message:\n${e.message}`)
   }
 }
+
+exports.requireAny = (...modules) => {
+  for (let m of modules) {
+    try {
+      return require(m)
+    } catch(e) {}
+  }
+  throw new Error(`Cannot find any of modules: ${modules}`)
+}

Diff for: test/utils.test.js

@@ -0,0 +1,13 @@
+const {requireAny} = require('../src/utils')
+
+describe('utils - requireAny', () => {
+  it('should throw error when none exist', () => {
+    expect(() => {
+      requireAny('_1', '_2')
+    }).toThrow('_1,_2');
+  })
+
+  it('should not throw error when any exist', () => {
+    expect(requireAny('_1', 'node-sass', '_2')).toBe(require('node-sass'));
+  })
+})