feat(transform): node require (#134)

* transform: support node require

* node require test

* replace endsWith with regex

Author: jongacnik

test/fixtures/example.js

@@ -0,0 +1 @@
+module.exports = '.foo { color: blue; }'

test/fixtures/import-source-js.js

@@ -0,0 +1,3 @@
+const sf = require('sheetify')
+
+sf('./example.js')

test/import.js

@@ -38,6 +38,35 @@ test('npm import', function (t) {
     }
   })
 
+  t.test('should import js file', function (t) {
+    t.plan(1)
+
+    const expected = require(path.join(__dirname, 'fixtures/example.js'))
+
+    const ws = concat(function (buf) {
+      const res = String(buf).trim()
+      t.equal(res, expected, 'package was imported')
+    })
+
+    const bOpts = { browserField: false }
+    const bpath = path.join(__dirname, 'fixtures/import-source-js.js')
+    browserify(bpath, bOpts)
+      .transform(sheetify)
+      .transform(function (file) {
+        return through(function (buf, enc, next) {
+          const str = buf.toString('utf8')
+          this.push(str.replace(/sheetify\/insert/, 'insert-css'))
+          next()
+        })
+      })
+      .plugin('css-extract', { out: outFn })
+      .bundle()
+
+    function outFn () {
+      return ws
+    }
+  })
+
   t.test('should emit an error on broken import', function (t) {
     t.plan(1)
 

transform.js

@@ -135,11 +135,18 @@ function transform (filename, options) {
   // (obj, fn) -> null
   function iterate (val, done) {
     if (val.css) return handleCss(val)
-    fs.readFile(val.filename, 'utf8', function (err, css) {
-      if (err) return done(err)
-      val.css = css
+
+    if (/\.js$/.test(val.filename)) {
+      delete require.cache[require.resolve(val.filename)]
+      val.css = require(val.filename)
       handleCss(val)
-    })
+    } else {
+      fs.readFile(val.filename, 'utf8', function (err, css) {
+        if (err) return done(err)
+        val.css = css
+        handleCss(val)
+      })
+    }
 
     function handleCss (val) {
       sheetify(val.css, val.filename, val.opts, function (err, css, prefix) {