/[perl]/mirror_cpan.pl
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Revision 1.2 - (hide annotations)
Sat Feb 1 00:51:51 2003 UTC (16 years, 2 months ago) by dpavlin
Branch: MAIN
Changes since 1.1: +4 -4 lines
File MIME type: text/plain
added support for .tgz archives

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

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