Category: | Utility Scripts | ||
Author/Contact Info | merlyn | ||
Description: | As noted in a parallel thread, I have this short program which can mirror a complete set of the installable modules for use with CPAN.pm.
This is for review purposes only. A final version of this code will appear in my LM column. Comments are welcome.
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#!/usr/bin/perl -w
use strict;
$|++;
### CONFIG
# the CPAN url to fetch
my $REMOTE = "http://www.cpan.org/";
# my $REMOTE = "file://Users/merlyn/MIRROR/CPAN/";
# my $REMOTE = "http://fi.cpan.org/";
# my $REMOTE = "http://au.cpan.org/";
# the path to the local mirror
# warning: unknown files below this dir are deleted!
my $LOCAL = "/Users/merlyn/Perl/MINICPAN/";
# how verbose? false means nothing but errors
my $TRACE = 1;
## END CONFIG
## core:
use File::Path qw(mkpath);
use File::Basename qw(dirname);
use File::Spec::Functions qw(catfile);
use File::Find qw(find);
## LWP:
use URI ();
use LWP::Simple qw(mirror RC_OK RC_NOT_MODIFIED);
## Compress::Zlib
use Compress::Zlib qw(gzopen $gzerrno);
## first, get index files
my_mirror($_) for qw(
authors/01mailrc.txt.gz
modules/02packages.details.txt.gz
modules/03modlist.data.gz
);
## now walk the packages list
my $gz = gzopen(catfile($LOCAL, "modules/02packages.details.txt.gz"),
+"rb")
or die "Cannot open details: $gzerrno";
my $state = 1;
while ($gz->gzreadline($_) > 0) {
if ($state == 1) { # in header
$state = 2 unless /\S/;
next;
}
if ($state == 2) { # blank following header
$state = 3;
next;
}
my ($module, $version, $path) = split;
my_mirror("authors/id/$path");
}
## finally, clean the files we didn't stick there
clean_unmirrored();
exit 0;
BEGIN {
my %mirrored;
sub my_mirror {
my $path = shift;
my $remote_uri = URI->new_abs($path, $REMOTE)->as_string;
my $local_file = catfile($LOCAL, $path);
return if $mirrored{$local_file}++;
## presume "authors/id/*" is up to date if it is present
return if $path =~ m{^authors/id} and -f $local_file;
print "$remote_uri -> $local_file\n" if $TRACE;
mkpath(dirname($local_file), 1, 0711);
my $status = mirror($remote_uri, $local_file);
return if $status == RC_OK or $status == RC_NOT_MODIFIED;
warn "$remote_uri: $status!\n";
}
sub clean_unmirrored {
find sub {
return unless -f and not $mirrored{$File::Find::name};
print "removing $File::Find::name\n" if $TRACE;
unlink $_ or warn "Cannot remove $File::Find::name: $!";
}, $LOCAL;
}
}
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Replies are listed 'Best First'. | |
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Re: Mirror only the installable parts of CPAN
by zentara (Archbishop) on Aug 08, 2002 at 15:57 UTC | |
by merlyn (Sage) on Aug 08, 2002 at 22:08 UTC |
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