Class: Stacker::Stack::Template::JSONFormatter

Inherits:
Object
  • Object
show all
Defined in:
lib/stacker/stack/template.rb

Constant Summary collapse

STR = 
'\"[^\"]+\"'

Class Method Summary collapse

Class Method Details

.format(object) ⇒ Object 



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# File 'lib/stacker/stack/template.rb', line 106

def self.format object
  formatted = JSON.pretty_generate object

  # put empty arrays on a single line
  formatted.gsub! /: \[\s*\]/m, ': []'

  # put { "Ref": ... } on a single line
  formatted.gsub! /\{\s+\"Ref\"\:\s+(?<ref>#{STR})\s+\}/m,
    '{ "Ref": \\k<ref> }'

  # put { "Fn::GetAtt": ... } on a single line
  formatted.gsub! /\{\s+\"Fn::GetAtt\"\: \[\s+(?<key>#{STR}),\s+(?<val>#{STR})\s+\]\s+\}/m,
    '{ "Fn::GetAtt": [ \\k<key>, \\k<val> ] }'

  formatted + "\n"
end