Append a fixed width format line to keywords file.

append_line.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'json'

def keywords_file
  ENV['PJKKG'] + '01'
end

def keywords_line(project)
  line = format('%-20s', project['project_id'])
  line += '  ' + format('%-30s', project['name'])
  line += '  ' + format('%-60s', project['description'])
  line.strip
end

project = JSON.parse("{ \"project_id\": \"1234567\", \"name\": \"Project name\",
 \"description\": \"Project description\" }")

open(keywords_file, 'a') { |f| f.puts keywords_line(project) } if File.exists?(keywords_file)

exit 0