extract_json_file_history_from_git.rb

require 'git'
require 'json'

filename = 'data.json'
working_dir = 'resources/repo1/'
g = Git.open(working_dir) #, :log => Logger.new(STDOUT))

history = []
g.log.path(filename).each do |log_entry|

    history << { 
                 :sha     => log_entry.sha, 
                 :author  => log_entry.author.name,
                 :date    => log_entry.date.strftime("%Y-%m-%d %H:%M"),
                 :message => log_entry.message,
                 :data    => JSON.parse(g.object("#{log_entry.sha}:#{filename}").contents)
               } 
end

puts JSON.pretty_generate(history)