testing inline and external source maps to ensure consistent behaviour

lib/require-hook.js

@@ -8,6 +8,7 @@ module.exports = function requireHook (opts) {
   var fs = remote.require('fs');
   var stripBOM = require('strip-bom');
   var combineSourceMap = require('combine-source-map');
+  var convertSourceMap = require('convert-source-map');
   var browserResolve = require('browser-resolve');
 
   var entry = opts.entry;
@@ -61,6 +62,13 @@ module.exports = function requireHook (opts) {
 
     var wrapScript = moduleWrap(script);
     if (!currentWrapFile) return wrapScript;
+
+    // If we have a source map pointing to a file, let Chrome handle it
+    if (convertSourceMap.mapFileCommentRegex.test(wrapScript)) {
+      return wrapScript;
+    }
+
+    // If we have inline source maps or none at all, we can use combine-source-map
     var sourceFile = path.relative(basedir, currentWrapFile)
       .replace(/\\/g, '/');
     var sourceRoot = basedir;

package.json

@@ -14,6 +14,7 @@
     "chokidar": "^1.4.2",
     "combine-source-map": "^0.7.1",
     "concat-stream": "^1.5.1",
+    "convert-source-map": "^1.2.0",
     "deep-extend": "^0.4.1",
     "electron-prebuilt": "^0.36.5",
     "events": "^1.1.0",

test/fixtures/inline-source-maps.js

@@ -0,0 +1,4 @@
+var withBase64 = require('./source-map-base64.js');
+var withMap = require('./source-map-external.js');
+console.log(withBase64());
+console.log(withMap.default());