#!/usr/bin/ruby

tracDir = '/home/myUser/trac_projects/myProject'
logFilePath = tracDir + '/queued_post_commits.txt'
doneFilePath = tracDir + '/queued_post_commits_done.txt'
errorFilePath = tracDir + '/queued_post_commits_errors.txt'
postCommitScriptPath = tracDir + '/trac-post-commit-hook.py'
tracURL = 'http://trac.myDomain.com/myProject/'
errorEmailTo = 'me@myDomain.com'

queuedCommits = Array.new
begin
  File.open(logFilePath, "r") do |file|
    file.each_line do |line|
      queuedCommits << line
    end
  end
rescue
  # no queued commits to process
  exit
end

# Empty out the file
system("echo '' > #{logFilePath}")

queuedCommits.each do |line|
  line.chomp!
  repo,rev = line.split(':')
  next unless repo and rev
  
  logMessage = `/usr/bin/svnlook log -r #{rev} #{repo}`
  author = `/usr/bin/svnlook author -r #{rev} #{repo}`
  
  # to make sure python can fine the trac module
  exportCmd = 'export PYTHONPATH="$HOME/packages/lib/python2.4/site-packages/:$PYTHONPATH"'
  postCommitCmd = %{/usr/bin/python  #{postCommitScriptPath} -p "#{tracDir}" -r "#{rev}" -u "#{author}" -m "#{logMessage}" -s "#{tracURL}"}
  
  if system("#{exportCmd}; #{postCommitCmd}")
    # log the success
    File.open(doneFilePath, "a") do |file|
      file.puts("#{Time.now}:#{repo}:#{rev}:#{author}:#{logMessage}")
    end
  else
    # write an error
    errorCode = $?
    File.open(errorFilePath, "a") do |file|
      file.puts("#{Time.now}:#{errorCode}:#{repo}:#{rev}:#{author}:#{logMessage}")
    end
    # and put the commit info back in the queue file
    File.open(logMessage, "a") do |file|
      file.puts line
    end
    # send an email
    system("echo #{errorFilePath} | mail -s 'Post Commit Errors' #{errorEmailTo}")
  end
end