git-reviewers

git-reviewers

#!/usr/bin/env ruby

require 'notmuch'

$skip = <<EOF.split("\n")
xmqqsgg7u3js.fsf@gitster.c.googlers.com
CAPig+cRqvd=_n9huD_txEr6EXVrWZx0onReL5bh_mCKy3M3LOg@mail.gmail.com
xmqqy2g08o0r.fsf@gitster.c.googlers.com
20190930153741.GA6124@chatter.i7.local
53844AEF.1080502@alum.mit.edu
xmqq8uslu1bi.fsf@gitster.dls.corp.google.com
CALKQrgdJ6d2SVWNQGa6d-eLYPAL-C21=tCyJczCDExLQRfq=jA@mail.gmail.com
EOF

$db = Notmuch::Database.new(ENV['HOME'] + '/mail')

def get_content(id)
  `notmuch show --part=1 id:#{id} | grep --text -v -E '^>'`.scrub.sub(/--* (>8|8<) --.*/, '').sub(/^From: .*/m, '')
end

def check_msg(msg)
  return false unless msg['subject'].start_with?('Re: ')
  get_content(msg.message_id) =~ /^\s*Reviewed-by: /
end

def get_all_replies(msg)
  all = []
  msg.replies.each do |reply|
    all << reply
    all += get_all_replies(reply)
  end
  all
end

$cached_threads = {}

def check_explicit(subject)
  query = $db.query('tag:git subject:"%s"' % subject)
  query.search_messages.each do |msg|
    next if $skip.include?(msg.message_id)
    return true if check_msg(msg)
  end
  query.search_threads.each do |thread|
    thread.toplevel_messages.each do |msg|
      return true if $cached_threads[thread.thread_id]
      get_all_replies(msg).each do |reply|
        if check_msg(reply)
          $cached_threads[thread.thread_id] = true
          return true
        end
      end
    end
  end
  return false
end

ROLES_REGEX = /^([^ \t\n\[\]\(\):]+): ([^<>]+) <(\S+?)>$/

$reviewers = Hash.new(0)

log_args = [ '--no-merges', '--since=10-years-ago', '--format=%h%n%s%n%aN%n%aE%n%as%n%b%x00', '--', ':!po/' ]
IO.popen(%w[git log] + log_args + ARGV) do |pipe|
  pipe.each("\0\n", chomp: true) do |commit|
    id, subject, name, email, date, body = commit.scrub.split("\n", 6)
    trailer = body.split("\n\n").last
    next unless trailer
    trailer.scan(ROLES_REGEX) do
      role = $1.downcase
      if role == 'reviewed-by'
        explicit = check_explicit(subject)
        puts '%s: %s: %s%s' % [id, date, $2, explicit ? ' *' : '']
      end
    end
  end
end