[libio-all-perl] 12/14: Basic structure set up

Axel Beckert abe at deuxchevaux.org
Sun Apr 26 22:25:28 UTC 2015


This is an automated email from the git hooks/post-receive script.

abe pushed a commit to tag alt-io-all-new-0.00
in repository libio-all-perl.

commit be0cd7e70fd2a14c6f58092096ce8a21167892f5
Author: Ingy döt Net <ingy at ingy.net>
Date:   Mon Jul 16 23:55:28 2012 -0700

    Basic structure set up
    
    all tests pass
---
 lib/IO/All.pm         | 120 ++++++++++++++++++++++++++++++++++++++------------
 lib/IO/All/Dir.pm     |  41 +++++++++++++++++
 lib/IO/All/File.pm    |  40 +++++++++--------
 lib/IO/All/Filesys.pm |  22 +++++++++
 lib/IO/All/Node.pm    |  22 +++++++++
 lib/IO/All/OO.pm      |  37 +++++++++++++---
 lib/IO/All/Plugin.pm  |  11 -----
 t/expectations.t      |   2 +
 t/usage.t             |   7 ++-
 t/use.t               |  14 ++++--
 10 files changed, 248 insertions(+), 68 deletions(-)

diff --git a/lib/IO/All.pm b/lib/IO/All.pm
index e337d2d..72cbd07 100644
--- a/lib/IO/All.pm
+++ b/lib/IO/All.pm
@@ -1,7 +1,7 @@
 ##
 # name:      IO::All
 # author:    Ingy döt Net
-# abstract:  I Owe All of it to Graham and Damian!
+# abstract:  I Owe All to Larry Wall!
 # license:   perl
 # copyright: 2004, 2006, 2008, 2010, 2012
 
@@ -11,51 +11,115 @@ use strict;
 
 our $VERSION = 0.44;
 
-use XXX;
-
-use constant registry => {};
-
-has plugins => (
-    default => sub {
-        [qw(
-            IO::All::File
-            IO::All::Dir
-        )];
-    }
+has location => ();
+has plugin_classes => (
+    default => sub { [qw(
+        IO::All::File
+        IO::All::Dir
+    )] }
 );
+option 'strict';
+option 'overload';
+
+has methods => ( default => sub { +{} } );
 
 my $arg_key_pattern = qr/^-(\w+)$/;
 sub import {
     my $class = shift;
+    my $caller = caller;
+    no strict 'refs';
+    *{"${caller}::io"} = $class->make_constructor(@_);
+}
+
+sub make_constructor {
+    my $class = shift;
+    my $scope_args = $class->parse_args(@_);
+    return sub {
+        $class->throw("'io' constructor takes zero or one arguments")
+            if @_ > 1;
+        my $location = @_ ? shift(@_) : undef;
+        $class->new([-location => $location], @$scope_args);
+    };
+}
+
+{
+    no warnings 'redefine';
+    sub new {
+        my $class = shift;
+        my $self = bless {}, $class;
+        for (@_) {
+            my $property = shift(@$_);
+            $property =~ s/^-//;
+            $self->$property(@$_);
+        }
+        for my $plugin_class (@{$self->plugin_classes}) {
+            eval "require $plugin_class; 1"
+                or $self->throw("Can't require $plugin_class: $@");
+            $self->register_methods($plugin_class);
+            $self->register_overloads($plugin_class);
+            if (ref($self) eq $class) {
+                if ($plugin_class->can_upgrade($self)) {
+                    $self->rebless($plugin_class);
+                }
+            }
+        }
+        return $self;
+    }
+}
+
+# Parse
+#   use IO::All -foo, -bar => 'x', 'y', -baz => 0;
+# Into
+#   [ ['-foo'], ['-bar', 'x', 'y'], ['-baz, 0] ]
+sub parse_args {
+    my $class = shift;
     my $args = [];
-    my $insert;
     while (@_) {
         my $key = shift(@_);
-        die "Unknown argument '$key' for $class usage"
+        die "Unknown argument '$key' for '$class' usage"
             unless $key =~ $arg_key_pattern;
         my $arg = [$1];
-        while (@_ and $_[0] !~ $arg_key_pattern) {
-            push @$arg, shift(@_);
-        }
+        push @$arg, shift(@_)
+            while @_ and $_[0] !~ $arg_key_pattern; 
         push @$args, $arg;
     }
-    my $caller = caller;
-    no strict 'refs';
-    *{"${caller}::io"} = $class->make_constructor($args);
+    return $args;
 }
 
-sub make_constructor {
-    my ($class, $args) = @_;
-    return sub {
-        $class->new(%$args);
-    };
+sub with {
+    my $self = shift;
+    $self->plugin_classes([
+        map { /::/ ? $_ : __PACKAGE__ . "::$_" } @_
+    ]);
+}
+
+sub register_methods {
+    my ($self, $plugin_class) = @_;
+    for my $method (@{$plugin_class->upgrade_methods}) {
+        $self->methods->{$method} = $plugin_class;
+    }
+}
+
+sub register_overloads {
+    my ($self, $plugin_class) = @_;
 }
 
-sub new {
-    my ($class, $object, $args) = @_;
+sub AUTOLOAD {
+    my $self = shift;
+    (my $method = $IO::All::AUTOLOAD) =~ s/.*:://;
+    my $plugin_class = $self->methods->{$method}
+        or $self->throw("Can't locate object method '$method'");
+    $self->rebless($plugin_class);
+    $self->$method(@_);
 }
 
-sub BUILD {
+sub rebless {
+    my ($self, $plugin_class) = @_;
+    delete $self->{plugin_classes};
+    bless $self, $plugin_class;
+    $self->upgrade;
 }
 
+sub DESTROY {}
+
 1;
diff --git a/lib/IO/All/Dir.pm b/lib/IO/All/Dir.pm
new file mode 100644
index 0000000..983e066
--- /dev/null
+++ b/lib/IO/All/Dir.pm
@@ -0,0 +1,41 @@
+##
+# name:      IO::All::Dir
+# author:    Ingy döt Net
+# abstract:  Directory Plugin For IO::All
+# license:   perl
+# copyright: 2004, 2006, 2008, 2010, 2012
+
+package IO::All::Dir;
+use IO::All::OO;
+extends 'IO::All::Filesys';
+
+# Upgrade from IO::All to IO::All::Dir
+use constant upgrade_methods => [qw(dir mkdir)];
+
+sub can_upgrade {
+    my ($self, $object) = @_;
+    my $location = $object->location;
+    return if
+        not defined $location or
+        not length $location;
+    -d $location;
+}
+
+sub dir {
+    my $self = shift;
+    $self->name(shift) if @_;
+    return $self;
+}
+
+sub mkdir {
+    my ($self) = @_;
+    my $name = $self->name;
+    my $strict = $self->{_strict};
+    if (-d $name) {
+        return unless $strict;
+        $self->throw("Can't mkdir $name. Directory already exists.");
+    }
+    CORE::mkdir($name) or $self->throw("mkdir $name failed: $!");
+}
+
+1;
diff --git a/lib/IO/All/File.pm b/lib/IO/All/File.pm
index 2fe0288..57437c6 100644
--- a/lib/IO/All/File.pm
+++ b/lib/IO/All/File.pm
@@ -1,5 +1,5 @@
 ##
-# name:      IO::All
+# name:      IO::All::File
 # author:    Ingy döt Net
 # abstract:  File Plugin For IO::All
 # license:   perl
@@ -7,31 +7,35 @@
 
 package IO::All::File;
 use IO::All::OO;
-extends 'IO::All::Plugin';
+extends 'IO::All::Filesys';
 
-sub io_upgrade {
-    my ($self) = @_;
-    $self->file if
-        defined $self->name and
-        -e $self->name;
-}
+option 'utf8';
+
+# Upgrade from IO::All to IO::All::Dir
+use constant upgrade_methods => [qw(file print)];
 
-use constant io_methods => [qw(file print)];
+sub can_upgrade {
+    my ($self, $object) = @_;
+    my $location = $object->location;
+    return if
+        not defined $location or
+        not length $location;
+    -f $location;
+}
 
-use constant io_overloads => {
-    'file > file' => 'overload_file_to_file',
-    'file < file' => 'overload_file_from_file',
-    '${} file' => 'overload_file_as_scalar',
-    '@{} file' => 'overload_file_as_array',
-    '%{} file' => 'overload_file_as_dbm',
-};
+#
+# Worker Methods:
+#
 
 sub file {
     my $self = shift;
-    bless $self, __PACKAGE__;
     $self->name(shift) if @_;
     return $self;
-    return $self->_init;
+}
+
+sub print {
+    my $self = shift;
+    CORE::print(@_);
 }
 
 1;
diff --git a/lib/IO/All/Filesys.pm b/lib/IO/All/Filesys.pm
new file mode 100644
index 0000000..119da43
--- /dev/null
+++ b/lib/IO/All/Filesys.pm
@@ -0,0 +1,22 @@
+##
+# name:      IO::All::Filesys
+# author:    Ingy döt Net
+# abstract:  Filesys Base Class
+# license:   perl
+# copyright: 2004, 2006, 2008, 2010, 2012
+
+package IO::All::Filesys;
+use IO::All::OO;
+extends 'IO::All::Node';
+
+has name => ();
+option overload => ();
+
+sub upgrade {
+    my $self = shift;
+    $self->{name} = delete $self->{location}
+        if $self->{location};
+    $self->SUPER::upgrade(@_);
+}
+
+1;
diff --git a/lib/IO/All/Node.pm b/lib/IO/All/Node.pm
new file mode 100644
index 0000000..ad818c7
--- /dev/null
+++ b/lib/IO/All/Node.pm
@@ -0,0 +1,22 @@
+##
+# name:      IO::All::Node
+# author:    Ingy döt Net
+# abstract:  Base Class for Various IO::All Objects
+# license:   perl
+# copyright: 2012
+
+package IO::All::Node;
+use IO::All::OO;
+
+has upgrade_methods => ( default => sub { [] } );
+
+sub upgrade {
+    my ($self) = @_;
+    for my $key (keys %$self) {
+        next if $key =~ /^_/;
+        delete $self->{$key}
+            unless $self->can($key);
+    }
+}
+
+1;
diff --git a/lib/IO/All/OO.pm b/lib/IO/All/OO.pm
index fb87831..882cdad 100644
--- a/lib/IO/All/OO.pm
+++ b/lib/IO/All/OO.pm
@@ -7,10 +7,10 @@
 
 package IO::All::OO;
 
-# use Mo qw'default build import exporter';
+# use Mo qw'default build import exporter xxx';
 #   The following line of code was produced from the previous line by
 #   Mo::Inline version 0.31
-no warnings;my$M=__PACKAGE__.'::';*{$M.Object::new}=sub{bless{@_[1..$#_]},$_[0]};*{$M.import}=sub{import warnings;$^H|=1538;my($P,%e,%o)=caller.'::';shift;eval"no Mo::$_",&{$M.$_.::e}($P,\%e,\%o,\@_)for at _;return if$e{M};%e=(extends,sub{eval"no $_[0]()";@{$P.ISA}=$_[0]},has,sub{my$n=shift;my$m=sub{$#_?$_[0]{$n}=$_[1]:$_[0]{$n}};$m=$o{$_}->($m,$n, at _)for sort keys%o;*{$P.$n}=$m},%e,);*{$P.$_}=$e{$_}for keys%e;@{$P.ISA}=$M.Object};*{$M.'default::e'}=sub{my($P,$e,$o)=@_;$o->{default}=sub{my($ [...]
+no warnings;my$M=__PACKAGE__.'::';*{$M.Object::new}=sub{bless{@_[1..$#_]},$_[0]};*{$M.import}=sub{import warnings;$^H|=1538;my($P,%e,%o)=caller.'::';shift;eval"no Mo::$_",&{$M.$_.::e}($P,\%e,\%o,\@_)for at _;return if$e{M};%e=(extends,sub{eval"no $_[0]()";@{$P.ISA}=$_[0]},has,sub{my$n=shift;my$m=sub{$#_?$_[0]{$n}=$_[1]:$_[0]{$n}};$m=$o{$_}->($m,$n, at _)for sort keys%o;*{$P.$n}=$m},%e,);*{$P.$_}=$e{$_}for keys%e;@{$P.ISA}=$M.Object};*{$M.'default::e'}=sub{my($P,$e,$o)=@_;$o->{default}=sub{my($ [...]
 
 our @EXPORT = qw(chain option);
 
@@ -23,7 +23,7 @@ sub option {
     *{"${package}::$field"} =
       sub {
           my $self = shift;
-          *$self->{"_$field"} = @_ ? shift(@_) : 1;
+          $self->{"_$field"} = @_ ? shift(@_) : 1;
           return $self;
       };
 }
@@ -36,12 +36,37 @@ sub chain {
       sub {
           my $self = shift;
           if (@_) {
-              *$self->{$field} = shift;
+              $self->{$field} = shift;
               return $self;
           }
-          return $default unless exists *$self->{$field};
-          return *$self->{$field};
+          return $default unless exists $self->{$field};
+          return $self->{$field};
       };
 }
 
+sub field {
+    my $package = caller;
+    my ($field, $default) = @_;
+    no strict 'refs';
+    return if defined &{"${package}::$field"};
+    *{"${package}::$field"} =
+      sub {
+          my $self = shift;
+          unless (exists $self->{$field}) {
+              $self->{$field} =
+                ref($default) eq 'ARRAY' ? [] :
+                ref($default) eq 'HASH' ? {} :
+                $default;
+          }
+          return $self->{$field} unless @_;
+          $self->{$field} = shift;
+      };
+}
+
+sub throw {
+    my $self = shift;
+    require Carp;
+    Carp::croak(@_);
+}
+
 1;
diff --git a/lib/IO/All/Plugin.pm b/lib/IO/All/Plugin.pm
deleted file mode 100644
index c044252..0000000
--- a/lib/IO/All/Plugin.pm
+++ /dev/null
@@ -1,11 +0,0 @@
-##
-# name:      IO::All::Plugin
-# author:    Ingy döt Net
-# abstract:  Base Class for IO::All Plugins
-# license:   perl
-# copyright: 2012
-
-package IO::All::Plugin;
-use IO::All::OO;
-
-1;
diff --git a/t/expectations.t b/t/expectations.t
index 4b980b0..70242c7 100644
--- a/t/expectations.t
+++ b/t/expectations.t
@@ -20,6 +20,8 @@ Plan = 4;
 
 setup(*setup).eval_perl(*perl, *expect).Catch == *expect;
 
+setup('rm -f foo');
+
 === foo doesn't exist
 --- setup: rm -f foo
 --- perl: io('foo')->appends
diff --git a/t/usage.t b/t/usage.t
index 4d8ba32..65c3163 100644
--- a/t/usage.t
+++ b/t/usage.t
@@ -2,8 +2,13 @@ use TestML -run;
 
 
 __END__
+%TestML 1.0
 
-*perl.eval.manifest == *with;
+Plan = 1;
+
+1 == 1;
+
+# *perl.eval.manifest == *with;
 
 === No plugin modules asked for
 --- perl
diff --git a/t/use.t b/t/use.t
index b5a3997..120631b 100644
--- a/t/use.t
+++ b/t/use.t
@@ -1,7 +1,13 @@
-use Test::More tests => 1;
+use Test::More tests => 3;
 
-use IO::All -with => qw(Foo Bar), -strict, -overload => 0;
+use IO::All -with => qw(Dir File), -strict, -overload => 0;
 
-use XXX;
+system("touch foo");
 
-XXX io('foo', 0);
+my $io = io('foo');
+
+is $io->{name}, 'foo';
+is $io->{_strict}, 1;
+is $io->{_overload}, 0;
+
+system("rm -f foo");

-- 
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