refactor: bundle template.js respectively

src/template.js

@@ -0,0 +1,30 @@
+import * as _ from './util/underscore.js'
+import path from 'path'
+import {anySeries} from './util/promise.js'
+import {statFileAsync, readFileAsync} from './util/fs.js'
+
+function lookup (filepath, root, options) {
+  root = options.root.concat(root || [])
+  root = _.uniq(root)
+  const paths = root.map(root => path.resolve(root || location.href, filepath))
+  return anySeries(paths, async path => {
+    try {
+      await statFileAsync(path)
+      return path
+    } catch (e) {
+      e.message = `${e.code}: Failed to lookup ${filepath} in: ${root}`
+      throw e
+    }
+  })
+}
+
+export async function resolve (filepath, root, options) {
+  if (!path.extname(filepath)) {
+    filepath += options.extname
+  }
+  return lookup(filepath, root, options)
+}
+
+export async function read (filepath) {
+  return readFileAsync(filepath)
+}