#!/usr/bin/env perl

use strict;
use warnings;

# FILENAME: ls_sha1.pl
# CREATED: 29/05/12 16:42:08 by Kent Fredric (kentnl) <kentfredric@gmail.com>
# ABSTRACT: List all sha1's in parent order in current git repo

use Path::Class qw( dir );

my $cwd = dir(q{.});

sub is_git_dir {
  my ($dir) = @_;
  return unless -e $dir->subdir('objects');
  return unless -e $dir->subdir('refs');
  return unless -e $dir->file('HEAD');
  return 1;
}

sub find_git_dir {
  my $start = shift;
  if ( is_git_dir($start) ) {
    return $start;
  }
  if ( -e $start->subdir('.git') && is_git_dir( $start->subdir(q{.git}) ) ) {
    return $start->subdir('.git');
  }
  if ( $start->parent->stringify ne $start->stringify ) {
    return find_git_dir( $start->parent );
  }
  die "No Git Directory found";
}

require Git::PurePerl;
require Git::PurePerl::Walker;
require Git::PurePerl::Walker::Method::FirstParent;

sub trim {
  my $comment = shift;
  $comment =~ s/\s+/ /g;

  #if ( length( $comment ) > 80 ) {
  #	return substr( $comment, 0, 80 ) . '...';
  #}
  return $comment;
}

sub abbr_sha {
  my $sha = shift;
  return substr $sha, 0, 8;
}

my $repo = Git::PurePerl->new( gitdir => find_git_dir($cwd), );
use CPAN::Changes;
use CPAN::Changes::Release;
my $release = CPAN::Changes::Release->new(
  version => '1.0',
  date    => '2012-05-30',

);

my $walker = Git::PurePerl::Walker->new(
  repo      => $repo,
  method    => 'FirstParent::FromHEAD',
  on_commit => sub {
    my $commit = shift;
    $release->add_changes(
      { group => 'Git::Changes' },
      sprintf "%s %s (%s)",
      abbr_sha( $commit->sha1 ),
      trim( $commit->comment ),
      $commit->author->name
    );
  },
);

$walker->step_all;
my $changes = CPAN::Changes->new( preamble => "Revision History for \$Project", );
$changes->add_release($release);
print $changes->serialize();