在厨师的`ruby_block`中使用`$`字符 [英] Using the `$` character in `ruby_block` in chef

问题描述

我想在我的食谱中将以下代码用于 ruby​​_block ，但是由于'$'。该代码找不到 $ NAME ，但是可以找到 NAME 。您能给我一个解决方案吗？

I want to use the following code in my recipe for ruby_block, but it's not working because of the '$'. The code cannot find $NAME, but it can find NAME. Can you give me a solution?

file.search_file_replace_line("DEFAULT=/etc/default/$NAME","DEFAULT=/etc/default/tomcat7")

推荐答案

search_file_replace_line 期望正则表达式作为第一个论点。美元符号是正则表达式中的特殊符号，基本上表示行尾。因此，如果您真的想用某种东西替换它，就必须适当地对其进行转义。

search_file_replace_line expects regex as the first argument. And dollar sign is a special symbol within the regular expressions, it means end of the line, basically. So you have to properly escape it if you really want to replace it with something.

这可以完成工作：

file.search_file_replace_line("DEFAULT=/etc/default/\\$NAME","DEFAULT=/etc/default/tomcat7")

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