Fix for working with systemjs 0.17+ without getting 404s

src/adapter.js

@@ -14,8 +14,18 @@
  * limitations under the License.
  */
 
-(function(karma, System) {
-    System.config({ baseURL: 'base' });
+function configureSystem(config) {
+    var baseURLPattern = /(["']baseURL["']:.*["'])(.*)(["'])/;
+
+    // Fix baseURL path, by injecting base instead of the current value from config.js
+    var jspmConfig = config.replace(baseURLPattern, '$1base$3');
+
+    // Evel the config
+    eval(jspmConfig); 
+}
+
+(function(karma, System) {    
+    configureSystem(karma.config.jspm.config);
 
     // Prevent immediately starting tests.
     window.__karma__.loaded = function() {

src/init.js

@@ -76,7 +76,7 @@ module.exports = function(files, basePath, jspm, client) {
 
   // Pass on useBundles option to client
   client.jspm.useBundles = jspm.useBundles;
-
+  
   var packagesPath = path.normalize(basePath + '/' + jspm.packages + '/');
   var configPath = path.normalize(basePath + '/' + jspm.config);
 
@@ -93,7 +93,7 @@ module.exports = function(files, basePath, jspm, client) {
       return packagesPath + fileName + '.js';
     }
   }
-  files.unshift(createPattern(configPath));
+
   files.unshift(createPattern(__dirname + '/adapter.js'));
   files.unshift(createPattern(getLoaderPath('system-polyfills.src')));
   files.unshift(createPattern(getLoaderPath('system.src')));
@@ -107,6 +107,15 @@ module.exports = function(files, basePath, jspm, client) {
     return expandGlob(file, basePath);
   }));
 
+  // Inject the jspm config for later evaluation
+  if (fs.existsSync(configPath)) {
+    client.jspm.config = fs.readFileSync(configPath).toString();
+  } else {
+    client.jspm.config = {
+        baseURL: 'base'
+    };
+  }
+
   // Add served files to files array
   jspm.serveFiles.map(function(file){
     files.push(createServedPattern(basePath + "/" + (file.pattern || file)));

test/testInit.spec.js

@@ -20,9 +20,8 @@ describe('jspm plugin init', function(){
         initJspm(files, basePath, jspm, client);
     });
 
-    it('should add config.js to the top of the files array', function(){
-        expect(files[3].pattern).toEqual(basePath + '/custom_config.js');
-        expect(files[3].included).toEqual(true);
+    it('should add inject the config for later evaluation', function(){
+        expect(client.jspm.config).not.toBe(false);
     });
 
     it('should add adapter.js to the top of the files array', function(){
@@ -52,10 +51,10 @@ describe('jspm plugin init', function(){
     });
 
     it('should use the configured jspm_packages path and include it in the files array', function(){
-        expect(files[4].pattern).toEqual(path.resolve(cwd, './custom_packages/**/*'));
-        expect(files[4].included).toEqual(false);
-        expect(files[4].served).toEqual(true);
-        expect(files[4].watched).toEqual(true);
+        expect(files[3].pattern).toEqual(path.resolve(cwd, './custom_packages/**/*'));
+        expect(files[3].included).toEqual(false);
+        expect(files[3].served).toEqual(true);
+        expect(files[3].watched).toEqual(true);
     });
 
 });