如何从命令行打开ruby中的STDOUT.sync [英] How to turn on STDOUT.sync in ruby from the command line

问题描述

我有Objective-C代码，它调用ruby脚本并监视STDOUT。但是，默认情况下ruby似乎没有同步STDOUT，所以我需要在脚本开头放置 STDOUT.sync = true 以查看输出。

I have objective-C code that calls ruby scripts and monitors STDOUT. However, ruby does not seem to synchronise STDOUT by default, so I need to put STDOUT.sync = true at the beginning of the script to see output as it happens.

我可以在调用ruby脚本时将其作为命令行选项吗？

Can I do this as a command line option when calling a ruby script?

推荐答案

您可以在脚本之前创建要求的安装文件。然后使用 -r 标志调用ruby：

You can create a setup file to require before your script. Then call ruby with the -r flag:

ruby -r "$HOME/.rubyopts.rb" myscript.rb

您还可以设置环境变量 RUBYOPT 每次运行ruby时自动包含该文件：

You can also set the environment variable RUBYOPT to automatically include that file every time you run ruby:

export RUBYOPT="-r $HOME/.rubyopts.rb"

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