Ruby string manipulation

Terraspace
1

It is possible to apply ruby string manipulation on boot terraspace stage?
example::
if I define following in config/boot/devel.rb

ENV['AWS_REGION'] ||= 'eu-west-1'

It is possible to replace “-” in “_” using ruby on early ENV subst stage ?

It can be probably done using terraform string manipulation functions but it is interesting to know if can be done with ruby.too.

2

Ruby has many string power manipulation methods.

  1. Lots of them are built into Ruby’s standard core String class.
  2. And a lot more come with activesupport String extensions, which Terraspace includes.

Here are the Ruby String reference docs:

You can test them out quickly win an irb (interactive ruby shell) session. Example:

$ irb
> 'eu-west-1'.gsub('-','_')
 => "eu_west_1" 
> 
$

Here are the activesupport docs:

Example:

$ irb
> require "active_support/core_ext/string"
 => true 
> "some_test".camelize
 => "SomeTest" 
> "some_test".camelize.underscore
 => "some_test" 
> "some_test".dasherize
 => "some-test" 
> 
$
3

Thank you tung. I tried gsub in a wrong way (wrong position). Now I found it works fine.
An example below if someone need it:

define in conf/boot/devel.tf

ENV['AWS_REGION'] ||= 'eu-west-1'

then in configuration something like this:

<%= ENV['AWS_REGION'].gsub("-","_") %>

If you want to set once removing dashes, in config/boot/devel.rb define:

ENV['AWS_REGION'] ||= 'eu-west-1'
ENV['AWS_REGION_FLAT'] ||= ENV['AWS_REGION'].gsub("-","")

then in configuration use:

<%= ENV['AWS_REGION_FLAT'] %>

Thank you again