bin/git-blame-stats


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#!/usr/bin/perl

use Getopt::Long;
use POSIX qw(ceil);
use strict;
Getopt::Long::Configure(qw(bundling));
my %authors;
my $total;
my $files;
my $rev = shift(@ARGV) || "HEAD";

foreach my $file (`git ls-tree --name-only -r $rev`) {
  chomp($file);
  print STDERR "Processing $file\n";
  foreach my $line (`git blame -M -w $rev -- "$file"`) {
    chomp($line);
    if (substr($line, 0, 1) eq "^") {
      ++$authors{"*initial checkin"};
    } else {
      $line =~ s[^.*?\((.*?)\s*\d{4}-\d{2}-\d{2}.*][$1];
      ++$authors{$line};
    }
    ++$total;
  }
}

print "Total lines: $total\n";
my $i = 0;
my $author_ind = ceil(log(scalar(keys %authors)) / log(10));
my $lines_ind  = ceil(log($total) / log(10));
foreach my $author (sort { $authors{$b} <=> $authors{$a} } keys %authors) {
  printf "%${author_ind}s  %${lines_ind}u  %5.2f%%  %s\n",
  sprintf("#%u", ++$i),
  $authors{$author},
  $authors{$author} * 100 / $total,
  $author;
}