/[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 1.3 - (show annotations)
Wed Aug 6 17:55:19 2003 UTC (15 years, 10 months ago) by dpavlin
Branch: MAIN
Changes since 1.2: +4 -1 lines
File MIME type: text/plain
support -v and -d switch

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://cpan.pliva.hr/";
20 # 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 #my $LOCAL = "/mirrors/cpan/CPAN/";
26 my $LOCAL = "/rest/cpan/CPAN/";
27
28 my $TRACE = 0;
29 $TRACE = 1 if grep(/-v/,@ARGV);
30 $TRACE = 1 if grep(/-d/,@ARGV);
31
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 = $File::Find::name;
129 if ($path =~ s/(\.tar\.gz|\.tgz)/.readme/g && -f $path) {
130 # 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 $readme_path =~ s/\.(tar\.gz|\.tgz)/.readme/g || return; # just .tar.gz is supported!
142
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 }

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