make grunt wait for server start

This plugin requires Grunt ~0.4.2

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-wait-server --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-wait-server');

In your project's Gruntfile, add a section named waitServer or wait-server to the data object passed into grunt.initConfig().

grunt.initConfig({
  waitServer: {
    options: {
      req: 'http://localhost:8080',
      fail: function () {},
      timeout: 10 * 1000,
      isforce: false,
      interval: 800,
      print: true
    },

    server: {
      options: {
        req: {
          url: 'http://localhost:8080',
          method: 'HEAD'
        }
      }
    },

    remoteServer: {
      options: {
        req: 'http://example.com',
        print: false
      }
    },

    db: {
      options: {
        net: {
          port: 3306
        },
        timeout: 0
      }
    }
  }
});

Type: string or an options object
Default value: undefined
See request#options for available options.

Type: options object
Default value: undefined
See net.connect#options for available options.

Type: function
Default value: function () {}

Type: number
Default value: 10 * 1000
0 disables the timeout, will wait forever.

Type: boolean
Default value: false

Type: number
Default value: 800

Type: boolean
Default value: true

When options.isforce is true, the task will continue after options.timeout, even if the done signal in options.wait never came.

In this example, the waitServer task will wait for the server start with the least options.

grunt.initConfig({
  waitServer: {
    server: {
      options: {
        req: 'http://localhost:8080'
      }
    },
  },
});

grunt.initConfig({
  waitServer: {
    server: {
      options: {
        req: 'http://localhost:8080',
        fail: function () {
          console.error('the server had not start'); 
        },
        timeout: 20 * 1000,
        isforce: true,
        interval: 200,
        print: false
      }
    }
  },
});

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

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