CODEWITHSUNDEEP
regexchef-infradslchef-recipe
Balualways
Balualways

Reputation: 4510

Regular expressions in chef

How do we use regular expressions/pattern matching in a chef recipe. In my default.rb recipe, for example: 

case node["env_name"]
when "admin-dev"
     include_recipe "lxsetup-deploy::lxsetup-dev"
when "admin-dit"
     include_recipe "lxsetup-deploy::lxsetup-dev"
when "admin-perf1"
     include_recipe "lxsetup-deploy::lxsetup-qa"
when "admin-perf2"
     include_recipe "lxsetup-deploy::lxsetup-qa"
else
     include_recipe "lxsetup-deploy::lxsetup-prod" 
end

Is there any way I can do something like "admin-d*" or "admin-d[a-z]*" to match the strings admin-dev and admin-dit. I tried a bunch of stuff including the above ones but nothing helped.

Upvotes: 1

Views: 4298

Answers (2)

Tensibai
Tensibai

Reputation: 15784

Personnaly I like to use a hash to do this kind of mapping like this (and in attributes):

attribute.rb

env_to_suffix = 
{ 
  "admin-dev" => "dev",
  "admin-dit" => "dev",
  "admin-perf1" => "qa",
  "admin-perf2" => "qa"
}
default['company']['env_suffix'] = env_to_suffix[node.chef_environment] || "prod"

in recipe.rb

include_recipe "lxsetup-deploy::lxsetup-#{node['company]['env_suffix']}"

I find it easier to maintain in long term and it allow a per node override for edge cases.

Upvotes: 1

Draco Ater
Draco Ater

Reputation: 21226

It's a ruby code, so regular expression matching works the same way as in ruby.

case node["env_name"]
when /admin-d(ev)|(it)/
     include_recipe "lxsetup-deploy::lxsetup-dev"
when /admin-perf[12]/
     include_recipe "lxsetup-deploy::lxsetup-qa"
else
     include_recipe "lxsetup-deploy::lxsetup-prod" 
end

Upvotes: 3

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