Script commands may now be added to a package.

This adds the pkgBuilder.addCommand() method, which permits adding
a command (such as 'eslint':'eslint ./') to the npm scripts list.

Change-Id: I0ebfa9cbc0a526363cd2c8d1a0b697f5748e0771

generators/app/lib/pkg_builder.js

@@ -120,12 +120,31 @@
     return defaultValue || undefined;
   }
 
+  /**
+   * Create a specific NPM script command, invoked by 'npm run <name>' or 'npm <name>'.
+   *
+   * @param {String} name The name of the script.
+   * @param {String} command The command to invoke.
+   * @returns {void}
+   */
+  function addCommand (name, command) {
+
+    // sanity check, does 'scripts' exist?
+    if (!pkgContent.hasOwnProperty('scripts')) {
+      pkgContent.scripts = {};
+    }
+
+    // Save/Override the command.
+    pkgContent.scripts[name] = command;
+  }
+
   module.exports = {
     fromJSON: readPackage,
     toJSON: writePackage,
     setValues: setValues,
     getValues: getValues,
     getValue: getValue,
-    addDependencies: addDependencies
+    addDependencies: addDependencies,
+    addCommand: addCommand
   };
 })();

spec/app/lib/pkg_builder.js

@@ -187,5 +187,25 @@
         expect(builder.getValues()).toEqual({dependencies: {}});
       });
     });
+
+    describe('addCommand', function () {
+      it('should add a command', function () {
+        builder.fromJSON('{"scripts":{}}');
+        builder.addCommand('foo', 'bar');
+        expect(builder.getValue('scripts').foo).toBe('bar');
+      });
+
+      it('should overwrite an existing command', function () {
+        builder.fromJSON('{"scripts":{"foo":"bar"}}');
+        builder.addCommand('foo', 'lol');
+        expect(builder.getValue('scripts').foo).toBe('lol');
+      });
+
+      it('should create the scripts hash if it doesn\'t exist', function () {
+        builder.fromJSON('{}');
+        builder.addCommand('foo', 'bar');
+        expect(builder.getValue('scripts')).toBeDefined();
+      });
+    });
   });
 })();