lower copy's zero check level when from is glob pattern

lib/actions/copy-tpl.js

@@ -1,21 +1,19 @@
 'use strict';
 
-var path = require('path');
 var extend = require('deep-extend');
 var ejs = require('ejs');
-var isBinaryFile = require("isbinaryfile");
+var isBinaryFile = require('isbinaryfile');
 
 function render(contents, filename, context, tplSettings) {
   if (isBinaryFile.sync(filename)) {
     return contents.toString();
-  } else {
-    return ejs.render(
-      contents.toString(),
-      context,
-      // Setting filename by default allow including partials.
-      extend({filename: filename}, tplSettings)
-    );
   }
+  return ejs.render(
+    contents.toString(),
+    context,
+    // Setting filename by default allow including partials.
+    extend({filename: filename}, tplSettings)
+  );
 }
 
 module.exports = function (from, to, context, tplSettings, options) {

lib/actions/copy.js

@@ -11,7 +11,14 @@ var util = require('../util');
 
 function applyProcessingFunc(process, contents, filename) {
   var output = process(contents, filename);
-  return output instanceof Buffer ? output : new Buffer(output);
+  return output instanceof Buffer ? output : Buffer.from(output);
+}
+
+function arrayHasMagic(pattern) {
+  if (Array.isArray(pattern)) {
+    return pattern.some(arrayHasMagic);
+  }
+  return glob.hasMagic(pattern);
 }
 
 exports.copy = function (from, to, options) {
@@ -44,7 +51,12 @@ exports.copy = function (from, to, options) {
   }
 
   // Sanity checks: Makes sure we copy at least one file.
-  assert(files.length > 0, 'Trying to copy from a source that does not exist: ' + from);
+  // Glob pattern sometimes match no files, lower check level
+  if (!arrayHasMagic(from)) {
+    assert(files.length > 0, 'Trying to copy from a source that does not exist: ' + from);
+  } else if (files.length === 0) {
+    console.warn('Trying to copy from a source that does not exist: ' + from);
+  }
 
   files.forEach(file => {
     this._copySingle(file, generateDestination(file), options);

lib/actions/write.js

@@ -11,7 +11,7 @@ module.exports = function (filepath, contents, stat) {
   var file = this.store.get(filepath);
   file.isNew = file.contents === null;
   file.state = 'modified';
-  file.contents = typeof contents === 'string' ? new Buffer(contents) : contents;
+  file.contents = typeof contents === 'string' ? Buffer.from(contents) : contents;
   file.stat = stat;
   this.store.add(file);