JarDownload

jar download is used to download jar file from maven repoistroy

想法来源自： http://jingyan.baidu.com/article/22fe7ced3b0a003002617fd1.html , 将其中操作步骤，封装成一个 gem，自动化处理这一系列的步骤。

NOTE: 依赖系统中需要先安装 maven。

Installation

Add this line to your application's Gemfile:

gem 'jar_download'

And then execute:

$ bundle

Or install it yourself as:

$ gem install jar_download

Usage

命令行：

Usage: jar_download jar_name group_id version

jar download is used to download jar file from maven repoistroy

v0.1.0

Options:
    -h, --help                       Show command line help
        --version                    Show help/version info
        --verbose                    Be verbose
        --log-level LEVEL            Set the logging level
                                     (debug|info|warn|error|fatal)
                                     (Default: info)
       
# 例子使用       
jar_download mysql-connector-java mysql 5.1.27

编程使用：

jar_info =     {
      group_id: 'mysql',
      jar_name: 'mysql-connector-java',
      version: '5.1.27'
    }
JarDownload.download jar_info

服务器上安装 maven

yum install maven

修改 maven 配置，设置成阿里云的源：

# CentOS 下
# vi /etc/maven/settings.xml 找到 mirrors 块，加入如下行
<mirror>
  <id>alimaven</id>
  <name>aliyun maven</name>
  <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
  <mirrorOf>central</mirrorOf>
</mirror>

# MacOSX 下
# vi ~/.m2/settings.xml
<mirror>
  <id>alimaven</id>
  <name>aliyun maven</name>
  <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
  <mirrorOf>central</mirrorOf>
</mirror>

开发后记

利用 Tempfile 来创建类以及文件，从而实现，跨平台的兼容性。 windows 上还想不太支持。

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake false to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

库中核心方法：

  class PomXML
    attr_accessor :group_id, :jar_name, :version
    
    def initialize(jar_info = {})
        @group_id, @jar_name, @version = jar_info[:group_id], jar_info[:jar_name], jar_info[:version]
    end
  end
  
  def get_jar_info
    {
      group_id: 'mysql',
      jar_name: 'mysql-connector-java',
      version: '5.1.27'
    }
  end
  
  def generate_pom_xml(jar_info = get_jar_info)
    filename = File.join(File.dirname(__FILE__), "jar_download/pom.xml.erb")
    erb = ERB.new(File.read(filename))
    erb.filename = filename
    pom_xml = erb.def_class(PomXML, 'render()')
    
    result = pom_xml.new(jar_info).render()
    
    p result
    
    result
  end
  
  def command(jar_info = get_jar_info)
    FileUtils.mkdir_p("/tmp/jar_download")
    pwd = FileUtils.pwd
    
    File.open '/tmp/jar_download/pom.xml', 'w' do |file|
      file.write generate_pom_xml(jar_info)
    end
    
    system "cd /tmp/jar_download; mvn -f pom.xml dependency:copy-dependencies; cp -r target/dependency/*.jar #{pwd}"
  end

真正用到服务器上时，需要在服务器上安装 maven，发现速度还不如直接用 scp 将 jar 包拷贝上去来的方便。只能本地用用，真是失败。

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/jar_download. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.

jar_download

Development

Runtime

JarDownload

Installation

Usage

服务器上安装 maven

开发后记

Development

Contributing

License