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Edit File : RecursiveDependency.pm \| Size : 3.79 KB
# -- Mode: cperl; coding: utf-8; cperl-indent-level: 4 -- # vim: ts=4 sts=4 sw=4: package CPAN::Exception::RecursiveDependency; use strict; use overload '""' => "as_string"; use vars qw( $VERSION ); $VERSION = "5.5001"; { package CPAN::Exception::RecursiveDependency::na; use overload '""' => "as_string"; sub new { bless {}, shift }; sub as_string { "N/A" }; } my $NA = CPAN::Exception::RecursiveDependency::na->new; # a module sees its distribution (no version) # a distribution sees its prereqs (which are module names) (usually with versions) # a bundle sees its module names and/or its distributions (no version) sub new { my($class) = shift; my($deps_arg) = shift; my (@deps,%seen,$loop_starts_with); DCHAIN: for my $dep (@$deps_arg) { push @deps, {name => $dep, display_as => $dep}; if ($seen{$dep}++) { $loop_starts_with = $dep; last DCHAIN; } } my $in_loop = 0; my %mark; DWALK: for my $i (0..$#deps) { my $x = $deps[$i]{name}; $in_loop \|\|= $loop_starts_with && $x eq $loop_starts_with; my $xo = CPAN::Shell->expandany($x) or next; if ($xo->isa("CPAN::Module")) { my $have = $xo->inst_version \|\| $NA; my($want,$d,$want_type); if ($i>0 and $d = $deps[$i-1]{name}) { my $do = CPAN::Shell->expandany($d); $want = $do->{prereq_pm}{requires}{$x}; if (defined $want) { $want_type = "requires: "; } else { $want = $do->{prereq_pm}{build_requires}{$x}; if (defined $want) { $want_type = "build_requires: "; } else { $want_type = "unknown status"; $want = "???"; } } } else { $want = $xo->cpan_version; $want_type = "want: "; } $deps[$i]{have} = $have; $deps[$i]{want_type} = $want_type; $deps[$i]{want} = $want; $deps[$i]{display_as} = "$x (have: $have; $want_type$want)"; if ((! ref $have \|\| !$have->isa('CPAN::Exception::RecursiveDependency::na')) && CPAN::Version->vge($have, $want)) { # https://rt.cpan.org/Ticket/Display.html?id=115340 undef $loop_starts_with; last DWALK; } } elsif ($xo->isa("CPAN::Distribution")) { my $pretty = $deps[$i]{display_as} = $xo->pretty_id; my $mark_as; if ($in_loop) { $mark_as = CPAN::Distrostatus->new("NO cannot resolve circular dependency"); } else { $mark_as = CPAN::Distrostatus->new("NO one dependency ($loop_starts_with) is a circular dependency"); } $mark{$pretty} = { xo => $xo, mark_as => $mark_as }; } } if ($loop_starts_with) { while (my($k,$v) = each %mark) { my $xo = $v->{xo}; $xo->{make} = $v->{mark_as}; $xo->store_persistent_state; # otherwise I will not reach # all involved parties for # the next session } } bless { deps => \@deps, loop_starts_with => $loop_starts_with }, $class; } sub is_resolvable { ! defined shift->{loop_starts_with}; } sub as_string { my($self) = shift; my $deps = $self->{deps}; my $loop_starts_with = $self->{loop_starts_with}; unless ($loop_starts_with) { return "--not a recursive/circular dependency--"; } my $ret = "\nRecursive dependency detected:\n "; $ret .= join("\n => ", map {$_->{display_as}} @$deps); $ret .= ".\nCannot resolve.\n"; $ret; } 1; Back

Edit File : RecursiveDependency.pm | Size : 3.79 KB

# -*- Mode: cperl; coding: utf-8; cperl-indent-level: 4 -*-
# vim: ts=4 sts=4 sw=4:
package CPAN::Exception::RecursiveDependency;
use strict;
use overload '""' => "as_string";

use vars qw(
            $VERSION
);
$VERSION = "5.5001";

{
    package CPAN::Exception::RecursiveDependency::na;
    use overload '""' => "as_string";
    sub new { bless {}, shift };
    sub as_string { "N/A" };
}

my $NA = CPAN::Exception::RecursiveDependency::na->new;

# a module sees its distribution (no version)
# a distribution sees its prereqs (which are module names) (usually with versions)
# a bundle sees its module names and/or its distributions (no version)

sub new {
    my($class) = shift;
    my($deps_arg) = shift;
    my (@deps,%seen,$loop_starts_with);
  DCHAIN: for my $dep (@$deps_arg) {
        push @deps, {name => $dep, display_as => $dep};
        if ($seen{$dep}++) {
            $loop_starts_with = $dep;
            last DCHAIN;
        }
    }
    my $in_loop = 0;
    my %mark;
 DWALK: for my $i (0..$#deps) {
        my $x = $deps[$i]{name};
        $in_loop ||= $loop_starts_with && $x eq $loop_starts_with;
        my $xo = CPAN::Shell->expandany($x) or next;
        if ($xo->isa("CPAN::Module")) {
            my $have = $xo->inst_version || $NA;
            my($want,$d,$want_type);
            if ($i>0 and $d = $deps[$i-1]{name}) {
                my $do = CPAN::Shell->expandany($d);
                $want = $do->{prereq_pm}{requires}{$x};
                if (defined $want) {
                    $want_type = "requires: ";
                } else {
                    $want = $do->{prereq_pm}{build_requires}{$x};
                    if (defined $want) {
                        $want_type = "build_requires: ";
                    } else {
                        $want_type = "unknown status";
                        $want = "???";
                    }
                }
            } else {
                $want = $xo->cpan_version;
                $want_type = "want: ";
            }
            $deps[$i]{have} = $have;
            $deps[$i]{want_type} = $want_type;
            $deps[$i]{want} = $want;
            $deps[$i]{display_as} = "$x (have: $have; $want_type$want)";
            if ((! ref $have || !$have->isa('CPAN::Exception::RecursiveDependency::na'))
                && CPAN::Version->vge($have, $want)) {
                # https://rt.cpan.org/Ticket/Display.html?id=115340
                undef $loop_starts_with;
                last DWALK;
            }
        } elsif ($xo->isa("CPAN::Distribution")) {
            my $pretty = $deps[$i]{display_as} = $xo->pretty_id;
            my $mark_as;
            if ($in_loop) {
                $mark_as = CPAN::Distrostatus->new("NO cannot resolve circular dependency");
            } else {
                $mark_as = CPAN::Distrostatus->new("NO one dependency ($loop_starts_with) is a circular dependency");
            }
            $mark{$pretty} = { xo => $xo, mark_as => $mark_as };
        }
    }
    if ($loop_starts_with) {
        while (my($k,$v) = each %mark) {
            my $xo = $v->{xo};
            $xo->{make} = $v->{mark_as};
            $xo->store_persistent_state; # otherwise I will not reach
                                         # all involved parties for
                                         # the next session
        }
    }
    bless { deps => \@deps, loop_starts_with => $loop_starts_with }, $class;
}

sub is_resolvable {
    ! defined shift->{loop_starts_with};
}

sub as_string {
    my($self) = shift;
    my $deps = $self->{deps};
    my $loop_starts_with = $self->{loop_starts_with};
    unless ($loop_starts_with) {
        return "--not a recursive/circular dependency--";
    }
    my $ret = "\nRecursive dependency detected:\n    ";
    $ret .= join("\n => ", map {$_->{display_as}} @$deps);
    $ret .= ".\nCannot resolve.\n";
    $ret;
}

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