print_git_logs_since.rb

#!/usr/bin/env ruby

require 'time'

@default_root_dir = '~/code' # CHANGE THIS

def print_git_logs_since(date_str, root_directory)
  logs_by_date_by_project = Hash.new{|h,k| h[k] = Hash.new{|h,k| h[k] =[]}}

  root_directory ||= @default_root_dir
  git_dirs = `find #{root_directory} -maxdepth 5 -type d -name .git -exec dirname {} \\;`.split("\n")
  git_dirs.each do |dir|
    directory = dir.split('/')[-1].strip
    project = dir.split('/')[-2]
    committer = `git config --global user.name`.strip
    logs = `git --git-dir='#{dir}/.git' log --all --since=#{date_str} --author='#{committer}' --format=format:"%ad|||%s"`.split("\n")
    STDOUT.puts "#{directory}: found #{logs.count} logs since #{date_str}"
    logs.each do |log|
      iso, message = log.split("|||")
      time = Time.parse(iso)
      date_string = time.strftime("%Y-%m-%d (%A)")
      time_string = time.strftime("%I:%M %P")
      logs_by_date_by_project[date_string][project] << ["#{time_string}, #{directory}: #{message}", time]
    end
  end

  File.open("./commits-since-#{date_str}", 'w') do |f|
    logs_by_date_by_project.keys.sort.each do |date|
      f.write "--- #{date}:\n"
      logs_by_date_by_project[date].each do |project, entries|
        f.write "#{project}\n"
        entries.uniq.sort_by{|e,t| t.to_i}.each do |entry, time|
          f.write "#{entry}\n"
        end
        f.write "\n"
      end
      f.write "\n"
    end
    STDOUT.puts "printed summary to #{f.path}"
    system "echo '#{f.path}' | pbcopy"
  end
end

print_git_logs_since ARGV[0], ARGV[1]