From: Peter Rabbitson <ribasushi@cpan.org>
Date: Thu, 14 Jul 2016 13:20:03 +0000 (+0200)
Subject: Get rid of Package::Stash \o/
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=b090048f6d8bd2cba0bae8ea7ec26459dd20dca8;p=dbsrgits%2FDBIx-Class-Historic.git

Get rid of Package::Stash \o/

Internal tooling advanced sufficiently without planning for any of that:
a good indicator things are on the right track!

Read under -w
---

diff --git a/Makefile.PL b/Makefile.PL
index 5ef9948..df82cb7 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -85,10 +85,6 @@ my $test_requires = {
   #
   'Sub::Uplevel'             => '0.19',
 
-  # this is already a dep of n::c, but just in case - used by t/55namespaces_cleaned.t
-  # remove and do a manual glob-collection if n::c is no longer a dep
-  'Package::Stash'           => '0.28',
-
   # needed for testing only, not for operation
   # we will move away from this dep eventually, perhaps to DBD::CSV or something
   %{ DBIx::Class::Optional::Dependencies->req_list_for('test_rdbms_sqlite') },
diff --git a/lib/DBIx/Class/CDBICompat/ColumnGroups.pm b/lib/DBIx/Class/CDBICompat/ColumnGroups.pm
index 47eefd5..6ead1f7 100644
--- a/lib/DBIx/Class/CDBICompat/ColumnGroups.pm
+++ b/lib/DBIx/Class/CDBICompat/ColumnGroups.pm
@@ -98,7 +98,7 @@ sub _register_column_group {
         grep {
           $_ ne $class
             and
-          ($_->can($name)||0) == $existing_accessor
+          ( $Class::C3::MRO{$_} || {} )->{methods}{$name}
         } @{mro::get_linear_isa($class)}
       )
     )
diff --git a/lib/DBIx/Class/ResultSetManager.pm b/lib/DBIx/Class/ResultSetManager.pm
index 3ae9502..addc8c3 100644
--- a/lib/DBIx/Class/ResultSetManager.pm
+++ b/lib/DBIx/Class/ResultSetManager.pm
@@ -2,9 +2,8 @@ package DBIx::Class::ResultSetManager;
 use strict;
 use warnings;
 use base 'DBIx::Class';
-use Package::Stash ();
 
-use DBIx::Class::_Util 'set_subname';
+use DBIx::Class::_Util qw( set_subname describe_class_methods );
 use namespace::clean;
 
 warn "DBIx::Class::ResultSetManager never left experimental status and
@@ -56,25 +55,22 @@ sub _register_attributes {
     my $cache = $self->_attr_cache;
     return if keys %$cache == 0;
 
-    foreach my $meth (keys %{ { map
-      { $_ => 1 }
+    for my $meth(
       map
-        { Package::Stash->new($_)->list_all_symbols("CODE") }
-        @{ mro::get_linear_isa( ref $self || $self ) }
-    } } ) {
-        # *DO NOT* rely on P::S returning crefs in reverse mro order
-        # but instead ask the mro to redo the lookup
+        { $_->{name} }
+        grep
+          { $_->{attributes}{ResultSet} }
+          map
+            { $_->[0] }
+            values %{ describe_class_methods( ref $self || $self )->{methods} }
+    ) {
         # This codepath is extremely old, miht as well keep it running
         # as-is with no room for surprises
-        my $attrs = $cache->{$self->can($meth)};
-        next unless $attrs;
-        if ($attrs->[0] eq 'ResultSet') {
-            no strict 'refs';
-            my $resultset_class = $self->_setup_resultset_class;
-            my $name = join '::',$resultset_class, $meth;
-            *$name = set_subname $name, $self->can($meth);
-            delete ${"${self}::"}{$meth};
-        }
+        no strict 'refs';
+        my $resultset_class = $self->_setup_resultset_class;
+        my $name = join '::',$resultset_class, $meth;
+        *$name = set_subname $name, $self->can($meth);
+        delete ${"${self}::"}{$meth};
     }
 }
 
diff --git a/xt/extra/internals/namespaces_cleaned.t b/xt/extra/internals/namespaces_cleaned.t
index 19768a8..700a908 100644
--- a/xt/extra/internals/namespaces_cleaned.t
+++ b/xt/extra/internals/namespaces_cleaned.t
@@ -35,41 +35,48 @@ BEGIN {
 use strict;
 use warnings;
 
-# FIXME This is a crock of shit, needs to go away
-# currently here to work around https://rt.cpan.org/Ticket/Display.html?id=74151
-# kill with fire when PS::XS / RT#74151 is *finally* fixed
-BEGIN {
-  my $PS_provider;
-
-  if ( "$]" < 5.010 ) {
-    require Package::Stash::PP;
-    $PS_provider = 'Package::Stash::PP';
-  }
-  else {
-    require Package::Stash;
-    $PS_provider = 'Package::Stash';
-  }
-  eval <<"EOS" or die $@;
-
-sub stash_for (\$) {
-  $PS_provider->new(\$_[0]);
-}
-1;
-EOS
-}
-
 use Test::More;
 
 use DBICTest;
 use File::Find;
 use File::Spec;
-use DBIx::Class::_Util 'get_subname';
+use DBIx::Class::_Util qw( get_subname describe_class_methods );
 
 # makes sure we can load at least something
 use DBIx::Class;
 use DBIx::Class::Carp;
 
-my @modules = grep {
+my @modules = map {
+  # FIXME:  AS THIS IS CLEARLY A LACK OF DEFENSE IN describe_class_methods  :FIXME
+  # FIXME !!! without this detaint I get the test into an infloop on 5.16.x
+  # (maybe other versions): https://travis-ci.org/ribasushi/dbix-class/jobs/144738784#L26762
+  #
+  # or locally like:
+  #
+  # ~$ ulimit -v $(( 1024 * 256 )); perl -d:Confess -Ilib  -Tl xt/extra/internals/namespaces_cleaned.t
+  #     ...
+  #  DBIx::Class::MethodAttributes::_attr_cache("DBIx::Class::Storage::DBI::ODBC::Firebird") called at lib/DBIx/Class/MethodAttributes.pm line 166
+  #  DBIx::Class::MethodAttributes::_attr_cache("DBIx::Class::Storage::DBI::ODBC::Firebird") called at lib/DBIx/Class/MethodAttributes.pm line 166
+  #  DBIx::Class::MethodAttributes::_attr_cache("DBIx::Class::Storage::DBI::ODBC::Firebird") called at lib/DBIx/Class/MethodAttributes.pm line 166
+  #  DBIx::Class::MethodAttributes::_attr_cache("DBIx::Class::Storage::DBI::ODBC::Firebird") called at lib/DBIx/Class/MethodAttributes.pm line 154
+  #  DBIx::Class::MethodAttributes::FETCH_CODE_ATTRIBUTES("DBIx::Class::Storage::DBI::ODBC::Firebird", CODE(0x42ac2b0)) called at /home/rabbit/perl5/perlbrew/perls/5.16.2/lib/5.16.2/x86_64-linux-thread-multi-ld/attributes.pm line 101
+  #  attributes::get(CODE(0x42ac2b0)) called at lib/DBIx/Class/_Util.pm line 885
+  #  eval {...} called at lib/DBIx/Class/_Util.pm line 885
+  #  DBIx::Class::_Util::describe_class_methods("DBIx::Class::Storage::DBI::ODBC::Firebird") called at xt/extra/internals/namespaces_cleaned.t line 129
+  # Out of memory!
+  # Out of memory!
+  # Out of memory!
+  #    ...
+  # Segmentation fault
+  #
+  # FIXME:  AS THIS IS CLEARLY A LACK OF DEFENSE IN describe_class_methods  :FIXME
+  # Sweeping it under the rug for now as this is an xt/ test,
+  # but someone *must* find what is going on eventually
+  # FIXME:  AS THIS IS CLEARLY A LACK OF DEFENSE IN describe_class_methods  :FIXME
+
+  ( $_ =~ /(.+)/ )
+
+} grep {
   my ($mod) = $_ =~ /(.+)/;
 
   # not all modules are loadable at all times
@@ -115,10 +122,13 @@ for my $mod (@modules) {
   SKIP: {
     skip "$mod exempt from namespace checks",1 if $skip_idx->{$mod};
 
-    my %all_method_like = (map
-      { %{stash_for($_)->get_all_symbols('CODE')} }
-      (reverse @{mro::get_linear_isa($mod)})
-    );
+    my %all_method_like =
+      map
+        { $_->[0]{name} => $mod->can( $_->[0]{name} ) }
+        grep
+          { $_->[0]{via_class} ne 'UNIVERSAL' }
+          values %{ describe_class_methods($mod)->{methods} }
+    ;
 
     my %parents = map { $_ => 1 } @{mro::get_linear_isa($mod)};