/[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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Contents of /mirror_cpan.pl

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Revision 1.1 - (show annotations)
Sat Feb 1 00:40:22 2003 UTC (16 years, 4 months ago) by dpavlin
Branch: MAIN
File MIME type: text/plain
Mirror CPAN latest archive.

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