1 2 ruby testCommand.rb hello world 使用exec一个头疼的事情就是没有办法知道shell命令执行成功还是失败。 system system和exec相似,但是system执行的命令不会是在当前进程,而是在一个新创建的进程。system会返回布尔值来表明命令执行结果是成功还是失败。 1 2 3 4 5 6 7 8 9 10 1
Execute shell commands There are a number of different ways to run shell commands from Ruby. Theexeccommand Kernel#execreplaces the current process and runs the command: exec('ls ~')# Nothing after this command is executed This might be a bit impractical, so have a look at the other optio...
Wrapbox runs Ruby method or shell command in a container (ECS, docker). Installation Add this line to your application's Gemfile: gem'wrapbox' And then execute: $ bundle Or install it yourself as: $ gem install wrapbox Usage Write config.yml ...
1. **创建配置文件**:如果尚未存在 `.rubyshrc` 文件,你可以手动创建一个: ```bash touch ~/.rubyshrc ``` 2. **自定义命令**:在 `.rubyshrc` 文件中,你可以定义自己的命令。例如,下面的代码定义了一个名为 `hello` 的命令,用于打印问候信息: ```ruby command 'hello' do puts "Hello, RubySH!
cmd: commandline command line string which is passed to a shell [env, commandline, opts] command line string which is passed to a shell [env, cmdname, arg1, ..., opts] command name and one or more arguments (no shell) [env, [cmdname, argv0], arg1, ..., opts] command name an...
CommandProcessor#transactexecutes the given block against self, in this casesh; our Shell object. Within the block we can substitutesh.cdtocd, because the scope within the block usesshalready. sh=Shell.cd("/tmp")sh.transactdomkdir"shell-test-1"unlessexist?("shell-test-1")cd("shell-test...
安装过程非常简单,只需要在终端或命令提示符窗口中输入一行命令即可完成安装: ```shell $ gem install commander ``` 这条命令会从RubyGems仓库下载并安装最新版本的Commander包。一旦安装成功,开发者便可以立即开始利用Commander来构建具有自动补全功能的命令行应用程序,从而提高工作效率,改善用户体验。 ### 1.2 ...
shell Set or show the shell-specific Ruby version install Install a Ruby version using ruby-build uninstall Uninstall a specific Ruby version rehash Rehash rbenv shims (run this after installing executables) version Show the current Ruby version and its origin ...
If you use RVM or rbenv to manage local Ruby interpreters, you can quickly set the required interpreter using Run Anything: Press Ctrl twice. In the invoked popup, start typing rvm use or rbenv shell, select the required interpreter and press Enter. (Optional) If necessary, click the Rollba...
Before you get to know all of Tanakai's features, there is $ tanakai console command which is an interactive console where you can try and debug your scraping code very quickly, without having to run any spider (yes, it's like Scrapy shell). $ tanakai console --engine selenium_chrome...