Spine animation script that keys the flipX key at time 0 for all animations ending in "_west"

key_flip_x.rb

#!/usr/bin/env ruby

require 'json'

if ARGV.count != 1
  puts '[usage] ./key_flips_x.rb exported_skeleton.json'
  raise RuntimeError
end

file_path = ARGV[0]

root_hash = JSON.parse(File.read(file_path))

animations = root_hash['animations']

animations.each { |name, animation_hash|

  next unless name.include?('_west')

  root_bone = animation_hash['bones']['root']

  flipX_hash = {time: 0, x: true}
  root_bone['flipX'] = [flipX_hash]
}

File.open(file_path,"w") do |f|
  f.write(JSON.generate(root_hash))
end