/[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 1.2 - (show 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 #!/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 my $LOCAL = "/rest/cpan/CPAN/";
26
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 = $File::Find::name;
126 if ($path =~ s/(\.tar\.gz|\.tgz)/.readme/g && -f $path) {
127 # 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 $readme_path =~ s/\.(tar\.gz|\.tgz)/.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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