Ruby - Grab the commit history of all related files

commit_history.rb

results = []

file_names = `find . -print | grep '.*referral.*'`.split("\n");nil
file_names.each do |name|
  output = `git log --follow --pretty=format:'{"commit": "%H","author": "%aN <%aE>","date": "%ad","message": "%f"},' -- #{name}`
  results.concat(JSON.parse('[' + output.gsub("\n", '')[0..-2] + ']'))
end

mapping = {}
results.each do |res|
  next if mapping[res['commit']]
  mapping[res['commit']] = res
end

sorted_mapping = mapping.sort_by { |key,val| Date.strptime(val["date"], "%a %b %d %H:%M:%S %Y %z") }

File.open("related_commits.json","w") do |f|
  f.write(sorted_mapping.to_json)
end