Puppet 2.7 Cookbook

Using regular expressions in if statements

"Some people, when confronted with a problem think; 'I know, I'll use regular expressions.' Now they have two problems."—Jamie Zawinski

Another kind of expression you can test in if statements and other conditionals is the regular expression. A regular expression is a powerful way of comparing strings using pattern matching.

How to do it…

Add the following to your manifest:

if $lsbdistdescription =~ /LTS/ {
    notice("Looks like you are using a Long Term Support version of Ubuntu.")
} else {
    notice("You might want to upgrade to a Long Term Support version of Ubuntu...")
}

How it works…

Puppet treats the text supplied between the forward slashes as a regular expression that specifies what the text to be matched ...