Current File : //usr/share/perl5/vendor_perl/CPANPLUS/Internals.pm
package CPANPLUS::Internals;
### we /need/ perl5.6.1 or higher -- we use coderefs in @INC,
### and 5.6.0 is just too buggy
use 5.006001;
use strict;
use Config;
use CPANPLUS::Error;
use CPANPLUS::Selfupdate;
use CPANPLUS::Internals::Extract;
use CPANPLUS::Internals::Fetch;
use CPANPLUS::Internals::Utils;
use CPANPLUS::Internals::Constants;
use CPANPLUS::Internals::Search;
use CPANPLUS::Internals::Report;
require base;
use Cwd qw[cwd];
use Module::Load qw[load];
use Params::Check qw[check];
use Locale::Maketext::Simple Class => 'CPANPLUS', Style => 'gettext';
use Module::Load::Conditional qw[can_load];
use Object::Accessor;
local $Params::Check::VERBOSE = 1;
use vars qw[@ISA $VERSION];
@ISA = qw[
CPANPLUS::Internals::Extract
CPANPLUS::Internals::Fetch
CPANPLUS::Internals::Utils
CPANPLUS::Internals::Search
CPANPLUS::Internals::Report
];
$VERSION = "0.9138";
=pod
=head1 NAME
CPANPLUS::Internals - CPANPLUS internals
=head1 SYNOPSIS
my $internals = CPANPLUS::Internals->_init( _conf => $conf );
my $backend = CPANPLUS::Internals->_retrieve_id( $ID );
=head1 DESCRIPTION
This module is the guts of CPANPLUS -- it inherits from all other
modules in the CPANPLUS::Internals::* namespace, thus defying normal
rules of OO programming -- but if you're reading this, you already
know what's going on ;)
Please read the C<CPANPLUS::Backend> documentation for the normal API.
=head1 ACCESSORS
=over 4
=item _conf
Get/set the configure object
=item _id
Get/set the id
=cut
### autogenerate accessors ###
for my $key ( qw[_conf _id _modules _hosts _methods _status _path
_callbacks _selfupdate _mtree _atree]
) {
no strict 'refs';
*{__PACKAGE__."::$key"} = sub {
$_[0]->{$key} = $_[1] if @_ > 1;
return $_[0]->{$key};
}
}
=pod
=back
=head1 METHODS
=head2 $internals = CPANPLUS::Internals->_init( _conf => CONFIG_OBJ )
C<_init> creates a new CPANPLUS::Internals object.
You have to pass it a valid C<CPANPLUS::Configure> object.
Returns the object on success, or dies on failure.
=cut
{ ### NOTE:
### if extra callbacks are added, don't forget to update the
### 02-internals.t test script with them!
my $callback_map = {
### name default value
install_prerequisite => 1, # install prereqs when 'ask' is set?
edit_test_report => 0, # edit the prepared test report?
send_test_report => 1, # send the test report?
# munge the test report
munge_test_report => sub { return $_[1] },
# filter out unwanted prereqs
filter_prereqs => sub { return $_[1] },
# continue if 'make test' fails?
proceed_on_test_failure => sub { return 0 },
munge_dist_metafile => sub { return $_[1] },
};
my $status = Object::Accessor->new;
$status->mk_accessors(qw[pending_prereqs]);
my $callback = Object::Accessor->new;
$callback->mk_accessors(keys %$callback_map);
my $conf;
my $Tmpl = {
_conf => { required => 1, store => \$conf,
allow => IS_CONFOBJ },
_id => { default => '', no_override => 1 },
_authortree => { default => '', no_override => 1 },
_modtree => { default => '', no_override => 1 },
_hosts => { default => {}, no_override => 1 },
_methods => { default => {}, no_override => 1 },
_status => { default => '<empty>', no_override => 1 },
_callbacks => { default => '<empty>', no_override => 1 },
_path => { default => $ENV{PATH} || '', no_override => 1 },
};
sub _init {
my $class = shift;
my %hash = @_;
### temporary warning until we fix the storing of multiple id's
### and their serialization:
### probably not going to happen --kane
if( my $id = $class->_last_id ) {
# make it a singleton.
warn loc(q[%1 currently only supports one %2 object per ] .
qq[running program\n], 'CPANPLUS', $class);
return $class->_retrieve_id( $id );
}
my $args = check($Tmpl, \%hash)
or die loc(qq[Could not initialize '%1' object], $class);
bless $args, $class;
$args->{'_id'} = $args->_inc_id;
$args->{'_status'} = $status;
$args->{'_callbacks'} = $callback;
### initialize callbacks to default state ###
for my $name ( $callback->ls_accessors ) {
my $rv = ref $callback_map->{$name} ? 'sub return value' :
$callback_map->{$name} ? 'true' : 'false';
$args->_callbacks->$name(
sub { msg(loc("DEFAULT '%1' HANDLER RETURNING '%2'",
$name, $rv), $args->_conf->get_conf('debug'));
return ref $callback_map->{$name}
? $callback_map->{$name}->( @_ )
: $callback_map->{$name};
}
);
}
### create a selfupdate object
$args->_selfupdate( CPANPLUS::Selfupdate->new( $args ) );
### initialize it as an empty hashref ###
$args->_status->pending_prereqs( {} );
$conf->_set_build( startdir => cwd() ),
or error( loc("couldn't locate current dir!") );
$ENV{FTP_PASSIVE} = 1, if $conf->get_conf('passive');
my $id = $args->_store_id( $args );
unless ( $id == $args->_id ) {
error( loc("IDs do not match: %1 != %2. Storage failed!",
$id, $args->_id) );
}
### different source engines available now, so set them here
{ my $store = $conf->get_conf( 'source_engine' )
|| DEFAULT_SOURCE_ENGINE;
unless( can_load( modules => { $store => '0.0' }, verbose => 1 ) ) {
error( loc( "Could not load source engine '%1'", $store ) );
if( $store ne DEFAULT_SOURCE_ENGINE ) {
msg( loc("Falling back to %1", DEFAULT_SOURCE_ENGINE), 1 );
load DEFAULT_SOURCE_ENGINE;
base->import( DEFAULT_SOURCE_ENGINE );
} else {
return;
}
} else {
base->import( $store );
}
}
return $args;
}
=pod
=head2 $bool = $internals->_flush( list => \@caches )
Flushes the designated caches from the C<CPANPLUS> object.
Returns true on success, false if one or more caches could not be
be flushed.
=cut
sub _flush {
my $self = shift;
my $conf = $self->configure_object;
my %hash = @_;
my $aref;
my $tmpl = {
list => { required => 1, default => [],
strict_type => 1, store => \$aref },
};
my $args = check( $tmpl, \%hash ) or return;
my $flag = 0;
for my $what (@$aref) {
my $cache = '_' . $what;
### set the include paths back to their original ###
if( $what eq 'lib' ) {
$ENV{PERL5LIB} = $conf->_perl5lib || '';
@INC = @{$conf->_lib};
$ENV{PATH} = $self->_path || '';
### give all modules a new status object -- this is slightly
### costly, but the best way to make sure all statuses are
### forgotten --kane
} elsif ( $what eq 'modules' ) {
for my $modobj ( values %{$self->module_tree} ) {
$modobj->_flush;
}
### blow away the methods cache... currently, that's only
### File::Fetch's method fail list
} elsif ( $what eq 'methods' ) {
### still unbelievably p4 :( ###
$File'Fetch::METHOD_FAIL = $File'Fetch::METHOD_FAIL = {};
### blow away the m::l::c cache, so modules can be (re)loaded
### again if they become available
} elsif ( $what eq 'load' ) {
undef $Module::Load::Conditional::CACHE;
} else {
unless ( exists $self->{$cache} && exists $Tmpl->{$cache} ) {
error( loc( "No such cache: '%1'", $what ) );
$flag++;
next;
} else {
$self->$cache( {} );
}
}
}
return !$flag;
}
### NOTE:
### if extra callbacks are added, don't forget to update the
### 02-internals.t test script with them!
=pod
=head2 $bool = $internals->_register_callback( name => CALLBACK_NAME, code => CODEREF );
Registers a callback for later use by the internal libraries.
Here is a list of the currently used callbacks:
=over 4
=item install_prerequisite
Is called when the user wants to be C<asked> about what to do with
prerequisites. Should return a boolean indicating true to install
the prerequisite and false to skip it.
=item send_test_report
Is called when the user should be prompted if he wishes to send the
test report. Should return a boolean indicating true to send the
test report and false to skip it.
=item munge_test_report
Is called when the test report message has been composed, giving
the user a chance to programatically alter it. Should return the
(munged) message to be sent.
=item edit_test_report
Is called when the user should be prompted to edit test reports
about to be sent out by Test::Reporter. Should return a boolean
indicating true to edit the test report in an editor and false
to skip it.
=item proceed_on_test_failure
Is called when 'make test' or 'Build test' fails. Should return
a boolean indicating whether the install should continue even if
the test failed.
=item munge_dist_metafile
Is called when the C<CPANPLUS::Dist::*> metafile is created, like
C<control> for C<CPANPLUS::Dist::Deb>, giving the user a chance to
programatically alter it. Should return the (munged) text to be
written to the metafile.
=back
=cut
sub _register_callback {
my $self = shift or return;
my %hash = @_;
my ($name,$code);
my $tmpl = {
name => { required => 1, store => \$name,
allow => [$callback->ls_accessors] },
code => { required => 1, allow => IS_CODEREF,
store => \$code },
};
check( $tmpl, \%hash ) or return;
$self->_callbacks->$name( $code ) or return;
return 1;
}
# =head2 $bool = $internals->_add_callback( name => CALLBACK_NAME, code => CODEREF );
#
# Adds a new callback to be used from anywhere in the system. If the callback
# is already known, an error is raised and false is returned. If the callback
# is not yet known, it is added, and the corresponding coderef is registered
# using the
#
# =cut
#
# sub _add_callback {
# my $self = shift or return;
# my %hash = @_;
#
# my ($name,$code);
# my $tmpl = {
# name => { required => 1, store => \$name, },
# code => { required => 1, allow => IS_CODEREF,
# store => \$code },
# };
#
# check( $tmpl, \%hash ) or return;
#
# if( $callback->can( $name ) ) {
# error(loc("Callback '%1' is already registered"));
# return;
# }
#
# $callback->mk_accessor( $name );
#
# $self->_register_callback( name => $name, code => $code ) or return;
#
# return 1;
# }
}
=pod
=head2 $bool = $internals->_add_to_includepath( directories => \@dirs )
Adds a list of directories to the include path.
This means they get added to C<@INC> as well as C<$ENV{PERL5LIB}>.
Returns true on success, false on failure.
=cut
sub _add_to_includepath {
my $self = shift;
my %hash = @_;
my $dirs;
my $tmpl = {
directories => { required => 1, default => [], store => \$dirs,
strict_type => 1 },
};
check( $tmpl, \%hash ) or return;
my $s = $Config{'path_sep'};
### only add if it's not added yet
for my $lib (@$dirs) {
push @INC, $lib unless grep { $_ eq $lib } @INC;
#
### it will be complaining if $ENV{PERL5LIB] is not defined (yet).
local $^W;
$ENV{'PERL5LIB'} .= $s . $lib
unless $ENV{'PERL5LIB'} =~ qr|\Q$s$lib\E|;
}
return 1;
}
=pod
=head2 $bool = $internals->_add_to_path( directories => \@dirs )
Adds a list of directories to the PATH, but only if they actually
contain anything.
Returns true on success, false on failure.
=cut
sub _add_to_path {
my $self = shift;
my %hash = @_;
my $dirs;
my $tmpl = {
directories => { required => 1, default => [], store => \$dirs,
strict_type => 1 },
};
check( $tmpl, \%hash ) or return;
my $s = $Config{'path_sep'};
require File::Glob;
### only add if it's not added yet
for my $dir (@$dirs) {
$dir =~ s![\\/]*$!!g;
next if $ENV{PATH} =~ qr|\Q$dir\E|;
next unless -d $dir;
next unless File::Glob::bsd_glob( $dir . q{/*} );
$ENV{PATH} = join $s, $dir, $ENV{PATH};
}
return 1;
}
=pod
=head2 $id = CPANPLUS::Internals->_last_id
Return the id of the last object stored.
=head2 $id = CPANPLUS::Internals->_store_id( $internals )
Store this object; return its id.
=head2 $obj = CPANPLUS::Internals->_retrieve_id( $ID )
Retrieve an object based on its ID -- return false on error.
=head2 CPANPLUS::Internals->_remove_id( $ID )
Remove the object marked by $ID from storage.
=head2 @objs = CPANPLUS::Internals->_return_all_objects
Return all stored objects.
=cut
### code for storing multiple objects
### -- although we only support one right now
### XXX when support for multiple objects comes, saving source will have
### to change
{
my $idref = {};
my $count = 0;
sub _inc_id { return ++$count; }
sub _last_id { $count }
sub _store_id {
my $self = shift;
my $obj = shift or return;
unless( IS_INTERNALS_OBJ->($obj) ) {
error( loc("The object you passed has the wrong ref type: '%1'",
ref $obj) );
return;
}
$idref->{ $obj->_id } = $obj;
return $obj->_id;
}
sub _retrieve_id {
my $self = shift;
my $id = shift or return;
my $obj = $idref->{$id};
return $obj;
}
sub _remove_id {
my $self = shift;
my $id = shift or return;
return delete $idref->{$id};
}
sub _return_all_objects { return values %$idref }
}
1;
# Local variables:
# c-indentation-style: bsd
# c-basic-offset: 4
# indent-tabs-mode: nil
# End:
# vim: expandtab shiftwidth=4:
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