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#!/usr/bin/perl -w |
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use strict; |
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$|++; |
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|
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# Mirror CPAN latest archive. Based on article "Mirroring your own mini-CPAN" |
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# by Randal L. Schwartz for Linux Magazine Column 42 (Nov 2002) available on |
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# http://www.stonehenge.com/merlyn/LinuxMag/col42.html |
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# http://www.stonehenge.com/merlyn/LinuxMag/col42.listing.txt |
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|
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# TODO: |
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# - support for ZIP archives (and fix .tar.gz cludges) |
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# - add version requirement for Archive::Tar (0.22 has a bug which |
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# prevents it to extract some tars) |
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|
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### CONFIG |
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|
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#my $REMOTE = "http://ftp.linux.hr/CPAN/"; |
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my $REMOTE = "http://www.cpan.org/"; |
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# my $REMOTE = "http://fi.cpan.org/"; |
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# my $REMOTE = "http://au.cpan.org/"; |
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# my $REMOTE = "file://Users/merlyn/MIRROR/CPAN/"; |
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|
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## warning: unknown files below this dir are deleted! |
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my $LOCAL = "/mirrors/cpan/CPAN/"; |
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|
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my $TRACE = 0; |
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|
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### END CONFIG |
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|
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## core - |
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use File::Path qw(mkpath); |
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use File::Basename qw(dirname); |
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use File::Spec::Functions qw(catfile devnull); |
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use File::Find qw(find); |
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|
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## LWP - |
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use URI (); |
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use LWP::Simple qw(mirror RC_OK RC_NOT_MODIFIED); |
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|
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## Compress::Zlib - |
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use Compress::Zlib qw(gzopen $gzerrno); |
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|
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## Archive::Tar - |
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use Archive::Tar qw(); |
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|
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## first, get index files |
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my_mirror($_) for qw( |
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authors/01mailrc.txt.gz |
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modules/02packages.details.txt.gz |
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modules/03modlist.data.gz |
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); |
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|
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## now walk the packages list |
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my $details = catfile($LOCAL, qw(modules 02packages.details.txt.gz)); |
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my $gz = gzopen($details, "rb") or die "Cannot open details: $gzerrno"; |
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my $inheader = 1; |
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while ($gz->gzreadline($_) > 0) { |
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if ($inheader) { |
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$inheader = 0 unless /\S/; |
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next; |
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} |
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|
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my ($module, $version, $path) = split; |
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next if $path =~ m{/perl-5}; # skip Perl distributions |
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my_mirror("authors/id/$path", 1); |
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} |
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|
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## finally, clean the files we didn't stick there |
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clean_unmirrored(); |
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|
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exit 0; |
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|
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BEGIN { |
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## %mirrored tracks the already done, keyed by filename |
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## 1 = local-checked, 2 = remote-mirrored |
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my %mirrored; |
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|
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sub my_mirror { |
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my $path = shift; # partial URL |
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my $skip_if_present = shift; # true/false |
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|
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my $remote_uri = URI->new_abs($path, $REMOTE)->as_string; # full URL |
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my $local_file = catfile($LOCAL, split "/", $path); # native absolute file |
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my $checksum_might_be_up_to_date = 1; |
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|
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if ($skip_if_present and -f $local_file) { |
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## upgrade to checked if not already |
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$mirrored{$local_file} = 1 unless $mirrored{$local_file}; |
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} elsif (($mirrored{$local_file} || 0) < 2) { |
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## upgrade to full mirror |
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$mirrored{$local_file} = 2; |
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|
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mkpath(dirname($local_file), $TRACE, 0711); |
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print $path if $TRACE; |
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my $status = mirror($remote_uri, $local_file); |
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|
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if ($status == RC_OK) { |
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$checksum_might_be_up_to_date = 0; |
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print " ... updated\n" if $TRACE; |
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} elsif ($status != RC_NOT_MODIFIED) { |
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warn "\n$remote_uri: $status\n"; |
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return; |
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} else { |
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print " ... up to date\n" if $TRACE; |
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} |
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} |
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|
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if ($path =~ m{^authors/id}) { # maybe fetch CHECKSUMS |
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my $checksum_path = |
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URI->new_abs("CHECKSUMS", $remote_uri)->rel($REMOTE); |
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if ($path ne $checksum_path) { |
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my_mirror($checksum_path, $checksum_might_be_up_to_date); |
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} |
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} |
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} |
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|
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sub clean_unmirrored { |
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find sub { |
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return if /\.readme$/; # don't erase readme files |
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check_readme($File::Find::name); |
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return unless -f and not $mirrored{$File::Find::name}; |
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print "$File::Find::name ... removed\n" if $TRACE; |
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unlink $_ or warn "Cannot remove $File::Find::name: $!"; |
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my $path = $File::Find::name; |
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if ($path =~ s/\.tar\.gz/.readme/g && -f $path) { |
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# only if we erase archive also! |
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unlink $path or warn "Cannot remove $path: $!"; |
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} |
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}, $LOCAL; |
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} |
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|
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sub check_readme { |
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|
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my $path = shift; |
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|
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# fixup some things |
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my $readme_path = $path; |
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$readme_path =~ s/\.tar\.gz/.readme/g || return; # just .tar.gz is supported! |
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|
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my $at = Archive::Tar->new($path) or die "Archive::Tar failed on $path\n"; |
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|
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if (! -f $readme_path) { |
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# create readme file |
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my @readmes = sort grep m{^[^/]+/README\z}, $at->list_files(); |
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my $readme; |
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|
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if ($readme = shift @readmes) { |
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open(R, "> $readme_path") || die "Cannot create $readme_path: $!"; |
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print R $at->get_content($readme); |
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close(R); |
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|
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print "$readme_path ... created\n" if $TRACE; |
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|
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} else { |
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|
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$readme_path =~ s/^.+\/(.+)$/$1/; |
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print "can't find readme for $readme_path ...\n" if $TRACE; |
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|
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} |
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|
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} |
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} |
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|
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|
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} |
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