ublame

#!/usr/bin/env ruby

require 'time'

Commands = {
        :git => 'git annotate %s',
        :svn => 'svn blame --force %s',
}

Filters = Hash.new(lambda { |line| line })
Filters[:git] = lambda { |line|
        line.force_encoding Encoding::BINARY
        revision, name, time, line = 
                /(\w+)\s*\(([^\t]+)\t([^\t]+)\t[^\)]+\)(.*)/.match(line).to_a[1..-1]
        time = Time.parse time
        "%s %s %10s | %s\n" % [
                revision, time.strftime('%F %R'), name[0,10], line
        ]
}


files = ARGV.dup #.map { |a| File.expand_path a }
noexist = files.select { |f| !File.exist?(f) }
unless noexist.empty?
        $stderr.puts "Fictitious files passed as args:\n\t#{noexist.join(' ')}"
        exit 1
end

def figure_out_repotype path = Dir.pwd
        while path != '/'
                if File.directory?(File.join(path, ".git"))
                        return :git
                elsif File.directory?(File.join(path, ".svn"))
                        return :svn
                end

                path = File.dirname path
        end

        $stderr.puts "Couldn't figure out what sort of repo this is!"
        exit 2
end

type = figure_out_repotype
command = Commands[type]

files.each { |f|
        print *IO.popen(command % f, 'r').readlines.map(&Filters[type])
}