/[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 1.6 - (show annotations)
Sat Jan 31 18:25:54 2004 UTC (15 years, 2 months ago) by dpavlin
Branch: MAIN
CVS Tags: HEAD
Changes since 1.5: +19 -4 lines
File MIME type: text/plain
optionally compress readme files

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
30 # This may or may not save you some disks space (depending on filesystem
31 # that you use to store CPAN mirror)
32 #
33 # If you want to create gziped readme files, change $readme_ext to
34 # my $readme_ext = '.readme.gz';
35 #
36 # I found out that gziping readme files doesn't save any
37 # space at one server and saves space on my laptop. YMMV
38 my $readme_ext = '.readme.gz';
39
40 ### END CONFIG
41
42 ## core -
43 use File::Path qw(mkpath);
44 use File::Basename qw(dirname);
45 use File::Spec::Functions qw(catfile devnull);
46 use File::Find qw(find);
47 use Getopt::Long;
48 use IO::Zlib;
49
50 ## LWP -
51 use URI ();
52 use LWP::Simple qw(mirror RC_OK RC_NOT_MODIFIED);
53
54 ## Compress::Zlib -
55 use Compress::Zlib qw(gzopen $gzerrno);
56
57 ## Archive::Tar -
58 use Archive::Tar qw();
59
60 ## process command-line arguments
61 my $result = GetOptions(
62 "local=s" => \$LOCAL,
63 "remote=s" => \$REMOTE,
64 "verbose!" => \$TRACE,
65 "debug!" => \$TRACE
66 );
67
68 print "local path: $LOCAL\nremote URI: $REMOTE\n" if ($TRACE);
69
70 ## first, get index files
71 my_mirror($_) for qw(
72 authors/01mailrc.txt.gz
73 modules/02packages.details.txt.gz
74 modules/03modlist.data.gz
75 );
76
77 ## now walk the packages list
78 my $details = catfile($LOCAL, qw(modules 02packages.details.txt.gz));
79 my $gz = gzopen($details, "rb") or die "Cannot open details: $gzerrno";
80 my $inheader = 1;
81 while ($gz->gzreadline($_) > 0) {
82 if ($inheader) {
83 $inheader = 0 unless /\S/;
84 next;
85 }
86
87 my ($module, $version, $path) = split;
88 next if $path =~ m{/perl-5}; # skip Perl distributions
89 my_mirror("authors/id/$path", 1);
90 }
91
92 ## finally, clean the files we didn't stick there
93 clean_unmirrored();
94
95 exit 0;
96
97 BEGIN {
98 ## %mirrored tracks the already done, keyed by filename
99 ## 1 = local-checked, 2 = remote-mirrored
100 my %mirrored;
101
102 sub my_mirror {
103 my $path = shift; # partial URL
104 my $skip_if_present = shift; # true/false
105
106 my $remote_uri = URI->new_abs($path, $REMOTE)->as_string; # full URL
107 my $local_file = catfile($LOCAL, split "/", $path); # native absolute file
108 my $checksum_might_be_up_to_date = 1;
109
110 if ($skip_if_present and -f $local_file) {
111 ## upgrade to checked if not already
112 $mirrored{$local_file} = 1 unless $mirrored{$local_file};
113 } elsif (($mirrored{$local_file} || 0) < 2) {
114 ## upgrade to full mirror
115 $mirrored{$local_file} = 2;
116
117 mkpath(dirname($local_file), $TRACE, 0711);
118 print $path if $TRACE;
119 my $status = mirror($remote_uri, $local_file);
120
121 if ($status == RC_OK) {
122 $checksum_might_be_up_to_date = 0;
123 print " ... updated\n" if $TRACE;
124 } elsif ($status != RC_NOT_MODIFIED) {
125 warn "\n$remote_uri: $status\n";
126 return;
127 } else {
128 print " ... up to date\n" if $TRACE;
129 }
130 }
131
132 if ($path =~ m{^authors/id}) { # maybe fetch CHECKSUMS
133 my $checksum_path =
134 URI->new_abs("CHECKSUMS", $remote_uri)->rel($REMOTE);
135 if ($path ne $checksum_path) {
136 my_mirror($checksum_path, $checksum_might_be_up_to_date);
137 }
138 }
139 }
140
141 sub clean_unmirrored {
142 find sub {
143 return if /${readme_ext}$/; # don't erase readme files
144 check_readme($File::Find::name);
145 return unless -f and not $mirrored{$File::Find::name};
146 print "$File::Find::name ... removed\n" if $TRACE;
147 unlink $_ or warn "Cannot remove $File::Find::name: $!";
148 my $path = $File::Find::name;
149 if ($path =~ s/(\.tar\.gz|\.tgz)/${readme_ext}/g && -f $path) {
150 # only if we erase archive also!
151 unlink $path or warn "Cannot remove $path: $!";
152 }
153 }, $LOCAL;
154 }
155
156 sub check_readme {
157
158 my $path = shift;
159 # fixup some things
160 my $readme_path = $path;
161 $readme_path =~ s/\.(tar\.gz|\.tgz)/${readme_ext}/g || return; # just .tar.gz is supported!
162
163 my $at = Archive::Tar->new($path) or die "Archive::Tar failed on $path\n";
164
165 if (! -f $readme_path) {
166 # create readme file
167 my @readmes = sort grep m{^[^/]+/README\z}i, $at->list_files();
168 my $readme;
169
170 if ($readme = shift @readmes) {
171 my $fh;
172 if ($readme_ext =~ m/\.gz/) {
173 $fh = IO::Zlib->new($readme_path, "wb");
174 } else {
175 $fh = IO::File->new($readme_path, "w");
176 }
177 if (defined $fh) {
178 print $fh $at->get_content($readme);
179 $fh->close;
180 } else {
181 die "Cannot create $readme_path: $!";
182 }
183
184 print "$readme_path ... created\n" if $TRACE;
185
186 } else {
187
188 $readme_path =~ s/^.+\/(.+)$/$1/;
189 print "can't find readme for $readme_path ...\n" if $TRACE;
190
191 }
192
193 }
194 }
195
196
197 }

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