Update file.js

src/file.js

@@ -6,6 +6,8 @@ module.exports.write = write
 module.exports.resolve = resolve
 module.exports.join = join
 module.exports.dirname = dirname
+module.exports.templateVariables = templateVariables
+module.exports.templateFormat = templateFormat
 
 function read(filepath) {
   return fs.readFileSync(path.resolve(filepath), { encoding: 'utf-8' })
@@ -31,3 +33,20 @@ function join(path1, path2) {
 function dirname(filepath) {
   return path.dirname(filepath)
 }
+
+function templateVariables(template) {
+  const match = template.match(/{[^}]+}/g)
+
+  return Array.isArray(match) ? match.map(s => s.substring(1, s.length - 1)) : []
+}
+
+function templateFormat(template, obj) {
+  let output = template
+  for (let key in obj) {
+    const regex = new RegExp(`{${key}}`, 'g')
+    const value = obj[key] || undefined
+    output = output.replace(regex, value)
+  }
+
+  return output
+}