/[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 1.4 - (show annotations)
Thu Sep 4 14:39:17 2003 UTC (15 years, 7 months ago) by dpavlin
Branch: MAIN
Changes since 1.3: +11 -2 lines
File MIME type: text/plain
added command-line argument

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

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