pull_images.pl

#!/usr/bin/perl
#fetch Gravatars
#http://code.google.com/p/gource/wiki/GravatarExample

use strict;
use warnings;

use LWP::Simple;
use Digest::MD5 qw(md5_hex);

my $size       = 90;
my $output_dir = '.git/avatar';

die("no .git/ directory found in current path\n") unless -d '.git';

mkdir($output_dir) unless -d $output_dir;

open(GITLOG, q/git log --pretty=format:"%ae|%an" |/) or die("failed to read git-log: $!\n");

my %processed_authors;

while(<GITLOG>) {
	chomp;
	my($email, $author) = split(/\|/, $_);

	next if $processed_authors{$author}++;

	my $author_image_file = $output_dir . '/' . $author . '.png';

	#skip images we have
	next if -e $author_image_file;

	#try and fetch image

	my $grav_url = "http://www.gravatar.com/avatar/".md5_hex(lc $email)."?d=404&size=".$size; 

	warn "fetching image for '$author' $email ($grav_url)...\n";

	my $rc = getstore($grav_url, $author_image_file);

	sleep(1);

	if($rc != 200) {
		unlink($author_image_file);
		next;
	}
}

close GITLOG;