如何检测Ruby脚本是否通过外壳管道运行? [英] How to detect if a Ruby script is running through a shell pipe?

问题描述

我的问题与此类似:

My question is similar to this one: How to detect if my shell script is running through a pipe?. The difference is that the script I’m working on is written in Ruby.

假设我跑步:

./test.rb

我希望标准输出上的文本带有颜色，但是

I expect text on stdout with color, but

./test.rb | cat

我希望颜色代码被剥离.

I expect the color codes to be stripped out.

推荐答案

习惯上使用$stdout.isatty或更高版本，$stdout.tty?.我创建了一个小的test.rb文件来演示内容:

Use $stdout.isatty or more idiomatically, $stdout.tty?. I created a little test.rb file to demonstrate, contents:

puts $stdout.isatty

结果:

$ ruby test.rb
true

$ ruby test.rb | cat
false

参考: https://ruby-doc.org/core/IO.html#method-i-isatty

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