Fix: support for Node < v4

Author: Florian Reiterer

.travis.yml

@@ -5,6 +5,8 @@ node_js:
   - "9"
   - "8"
   - "6"
+  - "4"
+  - "0.10"
 after_script:
   - npm run coveralls
 branches:

index.js

@@ -13,9 +13,9 @@ function Concat(generateSourceMap, fileName, separator) {
   this.contentParts = [];
 
   if (separator === undefined) {
-    this.separator = Buffer.from('');
+    this.separator = bufferFrom('');
   } else {
-    this.separator = Buffer.from(separator);
+    this.separator = bufferFrom(separator);
   }
 
   if (this.sourceMapping) {
@@ -37,7 +37,7 @@ Concat.prototype.add = function(filePath, content, sourceMap) {
   filePath = filePath && unixStylePath(filePath);
 
   if (!Buffer.isBuffer(content)) {
-    content = Buffer.from(content);
+    content = bufferFrom(content);
   }
 
   if (this.contentParts.length !== 0) {
@@ -118,4 +118,16 @@ Object.defineProperty(Concat.prototype, 'sourceMap', {
   }
 });
 
+function bufferFrom(content) {
+  try {
+    return Buffer.from(content);
+  } catch(e) {
+    if (Object.prototype.toString.call(content) !== '[object String]') {
+      throw new TypeError("separator must be a string");
+    }
+    return new Buffer(content);
+  }
+}
+Concat.bufferFrom = bufferFrom;
+
 module.exports = Concat;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "concat-with-sourcemaps",
-  "version": "1.0.6",
+  "version": "1.0.7",
   "description": "Concatenate file contents with a custom separator and generate a source map",
   "homepage": "http://github.com/floridoo/concat-with-sourcemaps",
   "repository": "git://github.com/floridoo/concat-with-sourcemaps.git",

test/index.js

@@ -8,7 +8,7 @@ function testCase(description, options) {
     // content as Buffer
     var concat = new Concat(options.sourceMapping, options.outFile, options.separator);
     options.input.forEach(function(input, i) {
-      concat.add((input.fileName !== undefined ? input.fileName : 'test'+(i+1)), Buffer.from(input.content), input.sourceMap);
+      concat.add((input.fileName !== undefined ? input.fileName : 'test'+(i+1)), Concat.bufferFrom(input.content), input.sourceMap);
     });
     t.equal(concat.content.toString(), options.output.content, 'should produce the right output');
     if (options.output.sourceMap)