CPAN::Checksums(3) User Contributed Perl Documentation CPAN::Checksums(3)NAMECPAN::Checksums - Write a "CHECKSUMS" file for a directory as on CPAN
SYNOPSIS
use CPAN::Checksumsqw(updatedir);
my $success = updatedir($directory);
INCOMPATIBILITY ALERT
Since version 1.0 the generation of the attribute "shortname" is turned
off by default. It was too slow and was not used as far as I know, and
above all, it could fail on large directories. The shortname feature
can still be turned on by setting the global variable $TRY_SHORTNAME to
a true value.
DESCRIPTION
$success = updatedir($dir)
"updatedir()" takes a directory name as argument and writes a typical
"CHECKSUMS" file in that directory as used on CPAN unless a
previously written "CHECKSUMS" file is there that is still valid.
Returns 2 if a new "CHECKSUMS" file has been written, 1 if a valid
"CHECKSUMS" file is already there, otherwise dies.
Note: since version 2.0 updatedir on empty directories behaves just
the same. In older versions it silently did nothing.
Global Variables in package CPAN::Checksums
$IGNORE_MATCH
If the global variable $IGNORE_MATCH is set, then all files
matching this expression will be completely ignored and will not be
included in the CPAN "CHECKSUMS" files. Per default this variable
is set to
qr{(?i-xsm:readme$)}
$CAUTION
Setting the global variable $CAUTION causes updatedir() to report
changes of files in the attributes "size", "mtime", "md5", or
"md5-ungz" to STDERR.
$TRY_SHORTNAME
By setting the global variable $TRY_SHORTNAME to a true value, you
can tell updatedir() to include an attribute "shortname" in the
resulting hash that is 8.3-compatible. Please note, that
updatedir() in this case may be slow and may even fail on large
directories, because it will always only try 1000 iterations to
find a name that is not yet taken and then give up.
$SIGNING_KEY
Setting the global variable $SIGNING_KEY makes the generated
"CHECKSUMS" file to be clear-signed by the command specified in
$SIGNING_PROGRAM (defaults to "gpg --clearsign --default-key "),
passing the signing key as an extra argument. The resulting
"CHECKSUMS" file should look like:
0&&<<''; # this PGP-signed message is also valid perl
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
# CHECKSUMS file written on ... by CPAN::Checksums (v...)
$cksum = {
...
};
__END__
-----BEGIN PGP SIGNATURE-----
...
-----END PGP SIGNATURE-----
note that the actual data remains intact, but two extra lines are
added to make it legal for both OpenPGP and perl syntax.
$MIN_MTIME_CHECKSUMS
If the global variable $MIN_MTIME_CHECKSUMS is set, then updatedir
will renew signatures on checksum files that have an older mtime
than the given value.
PREREQUISITES
DirHandle, IO::File, Digest::MD5, Digest::SHA, Compress::Bzip2,
Compress::Zlib, File::Spec, Data::Dumper, Data::Compare, File::Temp
BUGS
If updatedir is interrupted, it may leave a temporary file lying
around. These files have the File::Temp template "CHECKSUMS.XXXX" and
should be harvested by a cronjob.
AUTHOR
Andreas Koenig, andreas.koenig@anima.de; GnuPG support by Autrijus Tang
COPYRIGHT & LICENSE
Copyright (c) 2002-2008 Andreas Koenig, Audrey Tang, Steve Peters.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
SEE ALSOperl(1).
perl v5.14.1 2010-11-20 CPAN::Checksums(3)