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File Content: `Error.pm`

package CPANPLUS::Error;

use strict;
use vars qw[$VERSION];
$VERSION = "0.9138";

use Log::Message private => 0;;

=pod

=head1 NAME

CPANPLUS::Error - error handling for CPANPLUS

=head1 SYNOPSIS

    use CPANPLUS::Error qw[cp_msg cp_error];

=head1 DESCRIPTION

This module provides the error handling code for the CPANPLUS
libraries, and is mainly intended for internal use.

=head1 FUNCTIONS

=head2 cp_msg("message string" [,VERBOSE])

Records a message on the stack, and prints it to C<STDOUT> (or actually
C<$MSG_FH>, see the C<GLOBAL VARIABLES> section below), if the
C<VERBOSE> option is true.
The C<VERBOSE> option defaults to false.

=head2 msg()

An alias for C<cp_msg>.

=head2 cp_error("error string" [,VERBOSE])

Records an error on the stack, and prints it to C<STDERR> (or actually
C<$ERROR_FH>, see the C<GLOBAL VARIABLES> sections below), if the
C<VERBOSE> option is true.
The C<VERBOSE> options defaults to true.

=head2 error()

An alias for C<cp_error>.

=head1 CLASS METHODS

=head2 CPANPLUS::Error->stack()

Retrieves all the items on the stack. Since C<CPANPLUS::Error> is
implemented using C<Log::Message>, consult its manpage for the
function C<retrieve> to see what is returned and how to use the items.

=head2 CPANPLUS::Error->stack_as_string([TRACE])

Returns the whole stack as a printable string. If the C<TRACE> option is
true all items are returned with C<Carp::longmess> output, rather than
just the message.
C<TRACE> defaults to false.

=head2 CPANPLUS::Error->flush()

Removes all the items from the stack and returns them. Since
C<CPANPLUS::Error> is  implemented using C<Log::Message>, consult its
manpage for the function C<retrieve> to see what is returned and how
to use the items.

=cut

BEGIN {
    use Exporter;
    use Params::Check   qw[check];
    use vars            qw[@EXPORT @ISA $ERROR_FH $MSG_FH];

    @ISA        = 'Exporter';
    @EXPORT     = qw[cp_error cp_msg error msg];

    my $log     = new Log::Message;

    for my $func ( @EXPORT ) {
        no strict 'refs';

        my $prefix  = 'cp_';
        my $name    = $func;
        $name       =~ s/^$prefix//g;

        *$func = sub {
                        my $msg     = shift;

                        ### no point storing non-messages
                        return unless defined $msg;

                        $log->store(
                                message => $msg,
                                tag     => uc $name,
                                level   => $prefix . $name,
                                extra   => [@_]
                        );
                };
    }

    sub flush {
        my @foo = $log->flush;
        return unless @foo;
        return reverse @foo;
    }

    sub stack {
        return $log->retrieve( chrono => 1 );
    }

    sub stack_as_string {
        my $class = shift;
        my $trace = shift() ? 1 : 0;

        return join $/, map {
                        '[' . $_->tag . '] [' . $_->when . '] ' .
                        ($trace ? $_->message . ' ' . $_->longmess
                                : $_->message);
                    } __PACKAGE__->stack;
    }
}

=head1 GLOBAL VARIABLES

=over 4

=item $ERROR_FH

This is the filehandle all the messages sent to C<error()> are being
printed. This defaults to C<*STDERR>.

=item $MSG_FH

This is the filehandle all the messages sent to C<msg()> are being
printed. This default to C<*STDOUT>.

=back

=cut

local $| = 1;
$ERROR_FH   = \*STDERR;
$MSG_FH     = \*STDOUT;

package # Hide from Pause
  Log::Message::Handlers;
use Carp ();

{

    sub cp_msg {
        my $self    = shift;
        my $verbose = shift;

        ### so you don't want us to print the msg? ###
        return if defined $verbose && $verbose == 0;

        my $old_fh = select $CPANPLUS::Error::MSG_FH;

        print '['. $self->tag . '] ' . $self->message . "\n";
        select $old_fh;

        return;
    }

    sub cp_error {
        my $self    = shift;
        my $verbose = shift;

        ### so you don't want us to print the error? ###
        return if defined $verbose && $verbose == 0;

        my $old_fh = select $CPANPLUS::Error::ERROR_FH;

        ### is only going to be 1 for now anyway ###
        ### C::I may not be loaded, so do a can() check first
        my $cb      = CPANPLUS::Internals->can('_return_all_objects')
                        ? (CPANPLUS::Internals->_return_all_objects)[0]
                        : undef;

        ### maybe we didn't initialize an internals object (yet) ###
        my $debug   = $cb ? $cb->configure_object->get_conf('debug') : 0;
        my $msg     =  '['. $self->tag . '] ' . $self->message . "\n";

        ### i'm getting this warning in the test suite:
        ### Ambiguous call resolved as CORE::warn(), qualify as such or
        ### use & at CPANPLUS/Error.pm line 57.
        ### no idea where it's coming from, since there's no 'sub warn'
        ### anywhere to be found, but i'll mark it explicitly nonetheless
        ### --kane
        print $debug ? Carp::shortmess($msg) : $msg . "\n";

        select $old_fh;

        return;
    }
}

1;

# Local variables:
# c-indentation-style: bsd
# c-basic-offset: 4
# indent-tabs-mode: nil
# End:
# vim: expandtab shiftwidth=4:
Name	Size	Permission
Backend	---	0755
Config	---	0755
Configure	---	0755
Dist	---	0755
Internals	---	0755
Module	---	0755
Shell	---	0755
Backend.pm	40338 bytes	0644
Config.pm	23769 bytes	0644
Configure.pm	16328 bytes	0644
Dist.pm	25216 bytes	0644
Error.pm	5250 bytes	0644
FAQ.pod	657 bytes	0644
Hacking.pod	3755 bytes	0644
Internals.pm	15294 bytes	0644
Module.pm	54885 bytes	0644
Selfupdate.pm	16881 bytes	0644
Shell.pm	9647 bytes	0644
File Content: Error.pm

File Content: `Error.pm`
