viewvc.cgi/perl/mirror_cpan.pl

#!/usr/bin/perl -w
use strict;
$|++;

# Mirror CPAN latest archive. Based on article "Mirroring your own mini-CPAN"
# by Randal L. Schwartz for Linux Magazine Column 42 (Nov 2002) available on 
# http://www.stonehenge.com/merlyn/LinuxMag/col42.html
# http://www.stonehenge.com/merlyn/LinuxMag/col42.listing.txt

# TODO:
# - support for ZIP archives (and fix .tar.gz cludges)
# - add version requirement for Archive::Tar (0.22 has a bug which
#   prevents it to extract some tars)

### CONFIG

#my $REMOTE = "http://ftp.linux.hr/CPAN/";
#my $REMOTE = "http://www.cpan.org/";
my $REMOTE = "http://cpan.pliva.hr/";
# my $REMOTE = "http://fi.cpan.org/";
# my $REMOTE = "http://au.cpan.org/";
# my $REMOTE = "file://Users/merlyn/MIRROR/CPAN/";

## warning: unknown files below this dir are deleted!
#my $LOCAL = "/mirrors/cpan/CPAN/";
my $LOCAL = "/rest/cpan/CPAN/";

my $TRACE = 0;
$TRACE = 1 if grep(/-v/,@ARGV);
$TRACE = 1 if grep(/-d/,@ARGV);

### END CONFIG

## core -
use File::Path qw(mkpath);
use File::Basename qw(dirname);
use File::Spec::Functions qw(catfile devnull);
use File::Find qw(find);

## LWP -
use URI ();
use LWP::Simple qw(mirror RC_OK RC_NOT_MODIFIED);

## Compress::Zlib -
use Compress::Zlib qw(gzopen $gzerrno);

## Archive::Tar -
use Archive::Tar qw();

## first, get index files
my_mirror($_) for qw(
                     authors/01mailrc.txt.gz
                     modules/02packages.details.txt.gz
                     modules/03modlist.data.gz
                    );

## now walk the packages list
my $details = catfile($LOCAL, qw(modules 02packages.details.txt.gz));
my $gz = gzopen($details, "rb") or die "Cannot open details: $gzerrno";
my $inheader = 1;
while ($gz->gzreadline($_) > 0) {
  if ($inheader) {
    $inheader = 0 unless /\S/;
    next;
  }

  my ($module, $version, $path) = split;
  next if $path =~ m{/perl-5};  # skip Perl distributions
  my_mirror("authors/id/$path", 1);
}

## finally, clean the files we didn't stick there
clean_unmirrored();

exit 0;

BEGIN {
  ## %mirrored tracks the already done, keyed by filename
  ## 1 = local-checked, 2 = remote-mirrored
  my %mirrored;

  sub my_mirror {
    my $path = shift;           # partial URL
    my $skip_if_present = shift; # true/false

    my $remote_uri = URI->new_abs($path, $REMOTE)->as_string; # full URL
    my $local_file = catfile($LOCAL, split "/", $path); # native absolute file
    my $checksum_might_be_up_to_date = 1;

    if ($skip_if_present and -f $local_file) {
      ## upgrade to checked if not already
      $mirrored{$local_file} = 1 unless $mirrored{$local_file};
    } elsif (($mirrored{$local_file} || 0) < 2) {
      ## upgrade to full mirror
      $mirrored{$local_file} = 2;

      mkpath(dirname($local_file), $TRACE, 0711);
      print $path if $TRACE;
      my $status = mirror($remote_uri, $local_file);

      if ($status == RC_OK) {
        $checksum_might_be_up_to_date = 0;
        print " ... updated\n" if $TRACE;
      } elsif ($status != RC_NOT_MODIFIED) {
        warn "\n$remote_uri: $status\n";
        return;
      } else {
        print " ... up to date\n" if $TRACE;
      }
    }

    if ($path =~ m{^authors/id}) { # maybe fetch CHECKSUMS
      my $checksum_path =
        URI->new_abs("CHECKSUMS", $remote_uri)->rel($REMOTE);
      if ($path ne $checksum_path) {
        my_mirror($checksum_path, $checksum_might_be_up_to_date);
      }
    }
  }

  sub clean_unmirrored {
    find sub {
      return if /\.readme$/; # don't erase readme files
      check_readme($File::Find::name);
      return unless -f and not $mirrored{$File::Find::name};
      print "$File::Find::name ... removed\n" if $TRACE;
      unlink $_ or warn "Cannot remove $File::Find::name: $!";
      my $path = $File::Find::name;
      if ($path =~ s/(\.tar\.gz|\.tgz)/.readme/g && -f $path) {
        # only if we erase archive also!
        unlink $path or warn "Cannot remove $path: $!";
      }
    }, $LOCAL;
  }

  sub check_readme {

    my $path = shift;
    # fixup some things
    my $readme_path = $path;
    $readme_path =~ s/\.(tar\.gz|\.tgz)/.readme/g || return;    # just .tar.gz is supported!

    my $at = Archive::Tar->new($path) or die "Archive::Tar failed on $path\n";

    if (! -f $readme_path) {
      # create readme file
      my @readmes = sort grep m{^[^/]+/README\z}, $at->list_files();
      my $readme;

      if ($readme = shift @readmes) {
        open(R, "> $readme_path") || die "Cannot create $readme_path: $!";
        print R $at->get_content($readme);
        close(R);

        print "$readme_path ... created\n" if $TRACE;

      } else {

        $readme_path =~ s/^.+\/(.+)$/$1/;
        print "can't find readme for $readme_path ...\n" if $TRACE;

      }

    }
  }


}
1	dpavlin	1.1	#!/usr/bin/perl -w
2			use strict;
3			$\|++;
4
5			# Mirror CPAN latest archive. Based on article "Mirroring your own mini-CPAN"
6			# by Randal L. Schwartz for Linux Magazine Column 42 (Nov 2002) available on
7			# http://www.stonehenge.com/merlyn/LinuxMag/col42.html
8			# http://www.stonehenge.com/merlyn/LinuxMag/col42.listing.txt
9
10			# TODO:
11			# - support for ZIP archives (and fix .tar.gz cludges)
12			# - add version requirement for Archive::Tar (0.22 has a bug which
13			# prevents it to extract some tars)
14
15			### CONFIG
16
17			#my $REMOTE = "http://ftp.linux.hr/CPAN/";
18	dpavlin	1.3	#my $REMOTE = "http://www.cpan.org/";
19			my $REMOTE = "http://cpan.pliva.hr/";
20	dpavlin	1.1	# my $REMOTE = "http://fi.cpan.org/";
21			# my $REMOTE = "http://au.cpan.org/";
22			# my $REMOTE = "file://Users/merlyn/MIRROR/CPAN/";
23
24			## warning: unknown files below this dir are deleted!
25	dpavlin	1.2	#my $LOCAL = "/mirrors/cpan/CPAN/";
26			my $LOCAL = "/rest/cpan/CPAN/";
27	dpavlin	1.1
28			my $TRACE = 0;
29	dpavlin	1.3	$TRACE = 1 if grep(/-v/,@ARGV);
30			$TRACE = 1 if grep(/-d/,@ARGV);
31	dpavlin	1.1
32			### END CONFIG
33
34			## core -
35			use File::Path qw(mkpath);
36			use File::Basename qw(dirname);
37			use File::Spec::Functions qw(catfile devnull);
38			use File::Find qw(find);
39
40			## LWP -
41			use URI ();
42			use LWP::Simple qw(mirror RC_OK RC_NOT_MODIFIED);
43
44			## Compress::Zlib -
45			use Compress::Zlib qw(gzopen $gzerrno);
46
47			## Archive::Tar -
48			use Archive::Tar qw();
49
50			## first, get index files
51			my_mirror($_) for qw(
52			authors/01mailrc.txt.gz
53			modules/02packages.details.txt.gz
54			modules/03modlist.data.gz
55			);
56
57			## now walk the packages list
58			my $details = catfile($LOCAL, qw(modules 02packages.details.txt.gz));
59			my $gz = gzopen($details, "rb") or die "Cannot open details: $gzerrno";
60			my $inheader = 1;
61			while ($gz->gzreadline($_) > 0) {
62			if ($inheader) {
63			$inheader = 0 unless /\S/;
64			next;
65			}
66
67			my ($module, $version, $path) = split;
68			next if $path =~ m{/perl-5}; # skip Perl distributions
69			my_mirror("authors/id/$path", 1);
70			}
71
72			## finally, clean the files we didn't stick there
73			clean_unmirrored();
74
75			exit 0;
76
77			BEGIN {
78			## %mirrored tracks the already done, keyed by filename
79			## 1 = local-checked, 2 = remote-mirrored
80			my %mirrored;
81
82			sub my_mirror {
83			my $path = shift; # partial URL
84			my $skip_if_present = shift; # true/false
85
86			my $remote_uri = URI->new_abs($path, $REMOTE)->as_string; # full URL
87			my $local_file = catfile($LOCAL, split "/", $path); # native absolute file
88			my $checksum_might_be_up_to_date = 1;
89
90			if ($skip_if_present and -f $local_file) {
91			## upgrade to checked if not already
92			$mirrored{$local_file} = 1 unless $mirrored{$local_file};
93			} elsif (($mirrored{$local_file} \|\| 0) < 2) {
94			## upgrade to full mirror
95			$mirrored{$local_file} = 2;
96
97			mkpath(dirname($local_file), $TRACE, 0711);
98			print $path if $TRACE;
99			my $status = mirror($remote_uri, $local_file);
100
101			if ($status == RC_OK) {
102			$checksum_might_be_up_to_date = 0;
103			print " ... updated\n" if $TRACE;
104			} elsif ($status != RC_NOT_MODIFIED) {
105			warn "\n$remote_uri: $status\n";
106			return;
107			} else {
108			print " ... up to date\n" if $TRACE;
109			}
110			}
111
112			if ($path =~ m{^authors/id}) { # maybe fetch CHECKSUMS
113			my $checksum_path =
114			URI->new_abs("CHECKSUMS", $remote_uri)->rel($REMOTE);
115			if ($path ne $checksum_path) {
116			my_mirror($checksum_path, $checksum_might_be_up_to_date);
117			}
118			}
119			}
120
121			sub clean_unmirrored {
122			find sub {
123			return if /\.readme$/; # don't erase readme files
124			check_readme($File::Find::name);
125			return unless -f and not $mirrored{$File::Find::name};
126			print "$File::Find::name ... removed\n" if $TRACE;
127			unlink $_ or warn "Cannot remove $File::Find::name: $!";
128			my $path = $File::Find::name;
129	dpavlin	1.2	if ($path =~ s/(\.tar\.gz\|\.tgz)/.readme/g && -f $path) {
130	dpavlin	1.1	# only if we erase archive also!
131			unlink $path or warn "Cannot remove $path: $!";
132			}
133			}, $LOCAL;
134			}
135
136			sub check_readme {
137
138			my $path = shift;
139			# fixup some things
140			my $readme_path = $path;
141	dpavlin	1.2	$readme_path =~ s/\.(tar\.gz\|\.tgz)/.readme/g \|\| return; # just .tar.gz is supported!
142	dpavlin	1.1
143			my $at = Archive::Tar->new($path) or die "Archive::Tar failed on $path\n";
144
145			if (! -f $readme_path) {
146			# create readme file
147			my @readmes = sort grep m{^[^/]+/README\z}, $at->list_files();
148			my $readme;
149
150			if ($readme = shift @readmes) {
151			open(R, "> $readme_path") \|\| die "Cannot create $readme_path: $!";
152			print R $at->get_content($readme);
153			close(R);
154
155			print "$readme_path ... created\n" if $TRACE;
156
157			} else {
158
159			$readme_path =~ s/^.+\/(.+)$/$1/;
160			print "can't find readme for $readme_path ...\n" if $TRACE;
161
162			}
163
164			}
165			}
166
167
168			}