X-Git-Url: http://git.vpit.fr/?a=blobdiff_plain;f=lib%2FCPANPLUS%2FDist%2FGentoo.pm;h=032d46e886d97571db70ff7c328c1c67cc1aaa2b;hb=be982bd595059880773785ac66270369de53a309;hp=af542eed5f6858177d1ba180674f78595ad7ab55;hpb=a631ba02aecb81e70e9c60d6d37ce554c7f707c2;p=perl%2Fmodules%2FCPANPLUS-Dist-Gentoo.git

diff --git a/lib/CPANPLUS/Dist/Gentoo.pm b/lib/CPANPLUS/Dist/Gentoo.pm
index af542ee..032d46e 100644
--- a/lib/CPANPLUS/Dist/Gentoo.pm
+++ b/lib/CPANPLUS/Dist/Gentoo.pm
@@ -3,17 +3,21 @@ package CPANPLUS::Dist::Gentoo;
 use strict;
 use warnings;
 
-use Cwd qw/abs_path/;
+use Cwd        ();
+use List::Util qw<reduce>;
 use File::Copy ();
 use File::Path ();
 use File::Spec;
 
-use IPC::Cmd qw/run can_run/;
+use IPC::Cmd          ();
+use Parse::CPAN::Meta ();
 
 use CPANPLUS::Error ();
 
-use base qw/CPANPLUS::Dist::Base/;
+use base qw<CPANPLUS::Dist::Base>;
 
+use CPANPLUS::Dist::Gentoo::Atom;
+use CPANPLUS::Dist::Gentoo::Guard;
 use CPANPLUS::Dist::Gentoo::Maps;
 
 =head1 NAME
@@ -22,36 +26,178 @@ CPANPLUS::Dist::Gentoo - CPANPLUS backend generating Gentoo ebuilds.
 
 =head1 VERSION
 
-Version 0.07
+Version 0.11
 
 =cut
 
-our $VERSION = '0.07';
+our $VERSION = '0.11';
 
 =head1 SYNOPSIS
 
+    # Using default values from your make.conf
+    cpan2dist --format=CPANPLUS::Dist::Gentoo --buildprereq Some::Module
+
+    # Specifying your own options
     cpan2dist --format=CPANPLUS::Dist::Gentoo \
               --dist-opts overlay=/usr/local/portage \
               --dist-opts distdir=/usr/portage/distfiles \
               --dist-opts manifest=yes \
               --dist-opts keywords=x86 \
-              --dist-opts header="# Copyright 1999-2008 Gentoo Foundation" \
+              --dist-opts header="# Begin" \
               --dist-opts footer="# End" \
               Any::Module You::Like
 
-=head1 DESCRPITON
+=head1 DESCRIPTION
+
+This module is a CPANPLUS backend that recursively generates Gentoo ebuilds for a given package in the default overlay, updates the manifest, and even emerges it (together with its dependencies) if the user requires it.
+
+The generated ebuilds are placed into the C<perl-gcpanp> category.
+They favour depending on a C<virtual>, on C<perl-core>, C<dev-perl> or C<perl-gcpan> (in that order) rather than C<perl-gcpanp>.
+
+=head1 OPTIONS
+
+You can pass specific options to L<cpan2dist> by using the C<--dist-opts> command-line argument followed by a C<key=value> pair, where C<key> is the option name and C<value> is what it is set to.
+C<--dist-opts> can be used several times.
+
+The valid option C<key>s are :
+
+=over 4
+
+=item *
+
+C<manifest>
+
+A boolean that indicates whether the F<Manifest> file should be generated by running C<ebuild manifest> onto the generated ebuilds.
+
+Defaults to C<yes>.
+
+=item *
+
+C<overlay>
+
+A string formatted as a space-delimited sequence of paths, that lists the different overlays in which existent ebuilds will be looked for.
+
+Defaults to the value of C<PORTDIR_OVERLAY> as returned by C<emerge --info> (usually F</usr/local/portage>).
+
+=item *
+
+C<distdir>
+
+The directory where C<ebuild> expects to find the source tarballs.
+You need write permissions on this directory.
+
+Defaults to the value of C<DISTDIR> as returned by C<emerge --info> (usually F</usr/portage/distfiles>).
+
+=item *
+
+C<keywords>
+
+The valid C<KEYWORDS> for the generated ebuilds.
+
+Defaults to the value of C<ACCEPT_KEYWORDS> as returned by C<emerge --info>.
+
+=item *
+
+C<header>
+
+A chunk of text that is prepended to every ebuild.
+
+Defaults to the generic Gentoo Foundation header.
 
-This module is a CPANPLUS backend that recursively generates Gentoo ebuilds for a given package in the specified overlay (defaults to F</usr/local/portage>), updates the manifest, and even emerges it (together with its dependencies) if the user requires it. You need write permissions on the directory where Gentoo fetches its source files (usually F</usr/portage/distfiles>). The valid C<KEYWORDS> for the generated ebuilds are by default those given in C<ACCEPT_KEYWORDS>, but you can specify your own with the C<keywords> dist-option.
+=item *
 
-The generated ebuilds are placed into the C<perl-gcpanp> category. They favour depending on a C<virtual>, on C<perl-core>, C<dev-perl> or C<perl-gcpan> (in that order) rather than C<perl-gcpanp>.
+C<footer>
+
+A chunk of text that is appended to every ebuild.
+
+Defaults to nothing.
+
+=back
+
+L<cpan2dist> itself takes other options, most notably :
+
+=over 4
+
+=item *
+
+C<--buildprereq> generates an ebuild for every dependency, even for those that are already up-to-date.
+Setting this option is recommended.
+
+=item *
+
+C<--force> forcefully regenerates ebuilds even if they already exist.
+
+=item *
+
+C<--install> installs the ebuilds after generating them.
+
+=item *
+
+C<--skiptest> skips tests while building, which speeds up the building process.
+
+=item *
+
+C<--verbose> shows a lot more information.
+
+=back
+
+Please refer to L<cpan2dist> documentation for a complete coverage of its abilities.
 
 =head1 INSTALLATION
 
-After installing this module, you should append C<perl-gcpanp> to your F</etc/portage/categories> file.
+Before installing this module, you should append C<perl-gcpanp> to your F</etc/portage/categories> file.
+
+You have two ways for installing this module :
+
+=over 4
+
+=item *
+
+Use the perl overlay located at L<http://git.overlays.gentoo.org/gitweb/?p=proj/perl-overlay.git>.
+It contains an ebuild for L<CPANPLUS::Dist::Gentoo> which will most likely be up-to-date given the reactivity of Gentoo's Perl herd.
+
+=item *
+
+Bootstrap an ebuild for L<CPANPLUS::Dist::Gentoo> using itself.
+
+First, make sure your system C<perl> is C<5.10> or greater, so that the L<CPANPLUS> toolchain is available.
+
+    $ perl -v
+    This is perl 5, version 12, subversion 2 (v5.12.2)...
+
+C<perl> C<5.12> is the current stable Perl version in Gentoo.
+If you still have C<perl> C<5.8.x>, you can upgrade it by running the following commands as root :
+
+    # emerge -tv ">=dev-lang/perl-5.10"
+    # perl-cleaner --all
+
+Then, fetch the L<CPANPLUS::Dist::Gentoo> tarball :
+
+    $ cd /tmp
+    $ wget http://search.cpan.org/CPAN/authors/id/V/VP/VPIT/CPANPLUS-Dist-Gentoo-0.11.tar.gz
+
+Log in as root and unpack it in e.g. your home directory :
+
+    # cd
+    # tar xzf /tmp/CPANPLUS-Dist-Gentoo-0.11.tar.gz
+    # cd CPANPLUS-Dist-Gentoo-0.11
+
+Bootstrap L<CPANPLUS::Dist::Gentoo> using the bundled shell script C<g-cpanp> :
+
+    # perl Makefile.PL
+    # make
+    # PERL5LIB=blib/lib samples/g-cpanp CPANPLUS::Dist::Gentoo
+
+Finally, emerge the C<CPANPLUS-Dist-Gentoo> ebuild you've just generated :
+
+    # emerge -tv CPANPLUS-Dist-Gentoo
+
+=back
 
 =head1 METHODS
 
-All the methods are inherited from L<CPANPLUS::Dist::Base>. Please refer to its documentation for precise information on what's done at each step.
+This module inherits all the methods from L<CPANPLUS::Dist::Base>.
+Please refer to its documentation for precise information on what's done at each step.
 
 =cut
 
@@ -62,6 +208,7 @@ my $default_keywords;
 my $default_distdir;
 my $main_portdir;
 
+my %dependencies;
 my %forced;
 
 my $unquote = sub {
@@ -76,33 +223,45 @@ my $format_available;
 sub format_available {
  return $format_available if defined $format_available;
 
- for my $prog (qw/emerge ebuild/) {
-  unless (can_run($prog)) {
+ unless (IPC::Cmd->can_capture_buffer) {
+  my $msg = 'IPC::Cmd must be able to capture buffers.';
+  unless (do { local $@; eval { require IPC::Run; 1 } }) {
+   $msg  .= ' Try installing IPC::Run (dev-perl/IPC-Run on Gentoo).';
+  }
+  __PACKAGE__->_abort($msg);
+  return $format_available = 0;
+ }
+
+ for my $prog (qw<emerge ebuild>) {
+  unless (IPC::Cmd::can_run($prog)) {
    __PACKAGE__->_abort("$prog is required to write ebuilds");
    return $format_available = 0;
   }
  }
 
- if (IPC::Cmd->can_capture_buffer) {
+ {
   my $buffers;
-  my ($success, $errmsg) = run command => [ qw/emerge --info/ ],
-                               verbose => 0,
-                               buffer  => \$buffers;
+  my ($success, $errmsg) = IPC::Cmd::run(
+   command => [ qw<emerge --info> ],
+   verbose => 0,
+   buffer  => \$buffers,
+  );
   if ($success) {
    if ($buffers =~ /^PORTDIR_OVERLAY=(.*)$/m) {
-    $overlays = [ map abs_path($_), split ' ', $unquote->($1) ];
+    $overlays = [ map Cwd::abs_path($_), split ' ', $unquote->($1) ];
    }
    if ($buffers =~ /^ACCEPT_KEYWORDS=(.*)$/m) {
     $default_keywords = [ split ' ', $unquote->($1) ];
    }
    if ($buffers =~ /^DISTDIR=(.*)$/m) {
-    $default_distdir = abs_path($unquote->($1));
+    $default_distdir = Cwd::abs_path($unquote->($1));
    }
    if ($buffers =~ /^PORTDIR=(.*)$/m) {
-    $main_portdir = abs_path($unquote->($1));
+    $main_portdir = Cwd::abs_path($unquote->($1));
    }
   } else {
    __PACKAGE__->_abort($errmsg);
+   return $format_available = 0;
   }
  }
 
@@ -117,11 +276,15 @@ sub init {
  my $stat = $self->status;
  my $conf = $self->parent->parent->configure_object;
 
- $stat->mk_accessors(qw/name version author distribution desc uri src license
-                        deps eb_name eb_version eb_dir eb_file fetched_arch
-                        portdir_overlay
-                        overlay distdir keywords do_manifest header footer
-                        force verbose/);
+ $stat->mk_accessors(qw<
+  name version author distribution desc uri src license
+  meta min_perl
+  fetched_arch
+  requires configure_requires recursive_requires
+  ebuild_name ebuild_version ebuild_dir ebuild_file
+  portdir_overlay overlay distdir keywords do_manifest header footer
+  force verbose
+ >);
 
  $stat->force($conf->get_conf('force'));
  $stat->verbose($conf->get_conf('verbose'));
@@ -129,6 +292,25 @@ sub init {
  return 1;
 }
 
+my $filter_prereqs = sub {
+ my ($int, $prereqs) = @_;
+
+ my @requires;
+ for my $prereq (sort keys %$prereqs) {
+  next if $prereq =~ /^perl(?:-|\z)/;
+
+  my $obj = $int->module_tree($prereq);
+  next unless $obj; # Not in the module tree (e.g. Config)
+  next if $obj->package_is_perl_core;
+
+  my $version = $prereqs->{$prereq} || undef;
+
+  push @requires, [ $obj->package_name, $version ];
+ }
+
+ return \@requires;
+};
+
 sub prepare {
  my $self = shift;
  my $mod  = $self->parent;
@@ -140,8 +322,9 @@ sub prepare {
 
  my $OK   = sub { $stat->prepared(1); 1 };
  my $FAIL = sub { $stat->prepared(0); $self->_abort(@_) if @_; 0 };
+ my $SKIP = sub { $stat->prepared(1); $stat->created(1); $self->_skip(@_) if @_; 1 };
 
- my $keywords = delete $opts{'keywords'};
+ my $keywords = delete $opts{keywords};
  if (defined $keywords) {
   $keywords = [ split ' ', $keywords ];
  } else {
@@ -149,21 +332,26 @@ sub prepare {
  }
  $stat->keywords($keywords);
 
- my $manifest = delete $opts{'manifest'};
+ my $manifest = delete $opts{manifest};
  $manifest = 1 unless defined $manifest;
  $manifest = 0 if $manifest =~ /^\s*no?\s*$/i;
  $stat->do_manifest($manifest);
 
- my $header = delete $opts{'header'};
+ my $header = delete $opts{header};
  if (defined $header) {
   1 while chomp $header;
   $header .= "\n\n";
  } else {
-  $header = '';
+  my $year = (localtime)[5] + 1900;
+  $header = <<"  DEF_HEADER";
+# Copyright 1999-$year Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# \$Header: \$
+  DEF_HEADER
  }
  $stat->header($header);
 
- my $footer = delete $opts{'footer'};
+ my $footer = delete $opts{footer};
  if (defined $footer) {
   $footer = "\n" . $footer;
  } else {
@@ -171,17 +359,16 @@ sub prepare {
  }
  $stat->footer($footer);
 
- my $overlay = delete $opts{'overlay'};
- $overlay = (defined $overlay) ? abs_path $overlay : '/usr/local/portage';
+ my $overlay = delete $opts{overlay};
+ $overlay = (defined $overlay) ? Cwd::abs_path($overlay) : '/usr/local/portage';
  $stat->overlay($overlay);
 
- my $distdir = delete $opts{'distdir'};
- $distdir = (defined $distdir) ? abs_path $distdir : $default_distdir;
+ my $distdir = delete $opts{distdir};
+ $distdir = (defined $distdir) ? Cwd::abs_path($distdir) : $default_distdir;
  $stat->distdir($distdir);
 
- if ($stat->do_manifest && !-w $stat->distdir) {
-  return $FAIL->('distdir isn\'t writable');
- }
+ return $FAIL->("distdir isn't writable") if $stat->do_manifest && !-w $distdir;
+
  $stat->fetched_arch($mod->status->fetch);
 
  my $cur = File::Spec->curdir();
@@ -206,91 +393,179 @@ sub prepare {
 
  $stat->distribution($name . '-' . $version);
 
- $stat->eb_version(CPANPLUS::Dist::Gentoo::Maps::version_c2g($version));
+ $stat->ebuild_version(CPANPLUS::Dist::Gentoo::Maps::version_c2g($name, $version));
 
- $stat->eb_name(CPANPLUS::Dist::Gentoo::Maps::name_c2g($name));
+ $stat->ebuild_name(CPANPLUS::Dist::Gentoo::Maps::name_c2g($name));
 
- $stat->eb_dir(File::Spec->catdir(
+ $stat->ebuild_dir(File::Spec->catdir(
   $stat->overlay,
   CATEGORY,
-  $stat->eb_name,
+  $stat->ebuild_name,
  ));
 
  my $file = File::Spec->catfile(
-  $stat->eb_dir,
-  $stat->eb_name . '-' . $stat->eb_version . '.ebuild',
+  $stat->ebuild_dir,
+  $stat->ebuild_name . '-' . $stat->ebuild_version . '.ebuild',
  );
- $stat->eb_file($file);
-
- if (-e $file) {
-  my $skip = 1;
-  if ($stat->force and not $forced{$file}) {
-   if (-w $file) {
-    1 while unlink $file;
-    $forced{$file} = 1;
-    $skip = 0;
-   } else {
-    $self->_skip("Can't force rewriting of $file");
+ $stat->ebuild_file($file);
+
+ if ($stat->force) {
+  # Always generate an ebuild in our category when forcing
+  if ($forced{$file}) {
+   $stat->dist($file);
+   return $SKIP->('Ebuild already forced for', $stat->distribution);
+  }
+  ++$forced{$file};
+  if (-e $file) {
+   unless (-w $file) {
+    $stat->dist($file);
+    return $SKIP->("Can't force rewriting of $file");
    }
-  } else {
-   $self->_skip('Ebuild already generated for', $stat->distribution);
+   1 while unlink $file;
   }
-  if ($skip) {
-   $stat->prepared(1);
-   $stat->created(1);
-   $stat->dist($file);
-   return 1;
+ } else {
+  if (my $atom = $self->_cpan2portage($name, $version)) {
+   $stat->dist($atom->ebuild);
+   return $SKIP->('Ebuild already generated for', $stat->distribution);
   }
  }
 
- $self->SUPER::prepare(%opts);
-
  $stat->prepared(0);
 
+ $self->SUPER::prepare(@_);
+
+ return $FAIL->() unless $stat->prepared;
+
  my $desc = $mod->description;
- ($desc = $name) =~ s/-+/::/g unless $desc;
+ $desc    = $mod->comment                unless $desc;
+ $desc    = "$name Perl distribution (provides " . $mod->module . ')'
+                                         unless $desc;
+ $desc    = substr($desc, 0, 77) . '...' if length $desc > 80;
  $stat->desc($desc);
 
  $stat->uri('http://search.cpan.org/dist/' . $name);
 
- unless ($author =~ /^(.)(.)/) {
-  return $FAIL->('Wrong author name');
- }
- $stat->src("mirror://cpan/modules/by-authors/id/$1/$1$2/$author/"
-            . $mod->package);
+ $author =~ /^(.)(.)/ or return $FAIL->('Wrong author name');
+ $stat->src("mirror://cpan/modules/by-authors/id/$1/$1$2/$author/" . $mod->package);
 
- $stat->license([ qw/Artistic GPL-2/ ]);
+ $stat->license($self->intuit_license);
 
- my $prereqs = $mod->status->prereqs;
- my @depends;
- for my $prereq (sort keys %$prereqs) {
-  next if $prereq =~ /^perl(?:-|\z)/;
-  my $obj = $int->module_tree($prereq);
-  return $FAIL->('Wrong module object') unless $obj;
-  next if $obj->package_is_perl_core;
-  {
-   my $version;
-   if ($prereqs->{$prereq}) {
-    if ($obj->installed_version && $obj->installed_version < $obj->version) {
-     $version = $obj->installed_version;
-    } else {
-     $version = $obj->package_version;
-    }
-   }
-   push @depends, [ $obj->package_name, $version ];
+ my $mstat = $mod->status;
+ $stat->configure_requires($int->$filter_prereqs($mstat->configure_requires));
+ $stat->requires($int->$filter_prereqs($mstat->requires));
+ $stat->recursive_requires([ ]);
+
+ $dependencies{$name} = [ map $_->[0], @{ $stat->requires } ];
+
+ my $meta = $self->meta;
+ $stat->min_perl(CPANPLUS::Dist::Gentoo::Maps::perl_version_c2g(
+  $meta->{requires}->{perl},
+ ));
+
+ return $OK->();
+}
+
+=head2 C<meta>
+
+Returns the contents of the F<META.yml> or F<META.json> files as parsed by L<Parse::CPAN::Meta>.
+
+=cut
+
+sub meta {
+ my $self = shift;
+ my $mod  = $self->parent;
+ my $stat = $self->status;
+
+ my $meta = $stat->meta;
+ return $meta if defined $meta;
+
+ my $extract_dir = $mod->status->extract;
+
+ for my $name (qw<META.json META.yml>) {
+  my $meta_file = File::Spec->catdir($extract_dir, $name);
+  next unless -e $meta_file;
+
+  local $@;
+  my $meta = eval { Parse::CPAN::Meta::LoadFile($meta_file) };
+  if (defined $meta) {
+   $stat->meta($meta);
+   return $meta;
   }
  }
- $stat->deps(\@depends);
 
- return $OK->();
+ return;
+}
+
+=head2 C<intuit_license>
+
+Returns an array reference to a list of Gentoo licences identifiers under which the current distribution is released.
+
+=cut
+
+my %dslip_license = (
+ p => 'perl',
+ g => 'gpl',
+ l => 'lgpl',
+ b => 'bsd',
+ a => 'artistic',
+ 2 => 'artistic_2',
+);
+
+sub intuit_license {
+ my $self = shift;
+ my $mod  = $self->parent;
+
+ my $dslip = $mod->dslip;
+ if (defined $dslip and $dslip =~ /\S{4}(\S)/) {
+  my @licenses = CPANPLUS::Dist::Gentoo::Maps::license_c2g($dslip_license{$1});
+  return \@licenses if @licenses;
+ }
+
+ my $meta    = $self->meta;
+ my $license = $meta->{license};
+ if (defined $license) {
+  my @licenses = CPANPLUS::Dist::Gentoo::Maps::license_c2g($license);
+  return \@licenses if @licenses;
+ }
+
+ return [ CPANPLUS::Dist::Gentoo::Maps::license_c2g('perl') ];
 }
 
 sub create {
  my $self = shift;
  my $stat = $self->status;
 
- my $OK   = sub { $stat->created(1); $stat->dist($stat->eb_file); 1 };
- my $FAIL = sub { $stat->created(0); $stat->dist(undef); $self->_abort(@_) if @_; 0 };
+ my $file;
+
+ my $guard = CPANPLUS::Dist::Gentoo::Guard->new(sub {
+  if (defined $file and -e $file and -w _) {
+   1 while unlink $file;
+  }
+ });
+
+ my $SIG_INT = $SIG{INT};
+ local $SIG{INT} = sub {
+  if ($SIG_INT) {
+   local $@;
+   eval { $SIG_INT->() };
+   die $@ if $@;
+  }
+  die 'Caught SIGINT';
+ };
+
+ my $OK   = sub {
+  $guard->unarm;
+  $stat->created(1);
+  $stat->dist($file) if defined $file;
+  1;
+ };
+
+ my $FAIL = sub {
+  $stat->created(0);
+  $stat->dist(undef);
+  $self->_abort(@_) if @_;
+  0;
+ };
 
  unless ($stat->prepared) {
   return $FAIL->(
@@ -300,55 +575,46 @@ sub create {
 
  if ($stat->created) {
   $self->_skip($stat->distribution, 'was already created');
+  $file = $stat->dist; # Keep the existing one.
   return $OK->();
  }
 
- my $dir = $stat->eb_dir;
+ my $dir = $stat->ebuild_dir;
  unless (-d $dir) {
   eval { File::Path::mkpath($dir) };
   return $FAIL->("mkpath($dir): $@") if $@;
  }
 
- my %seen;
-
- my $d = $stat->header;
- $d   .= "# Generated by CPANPLUS::Dist::Gentoo version $VERSION\n\n";
- $d   .= 'MODULE_AUTHOR="' . $stat->author . "\"\ninherit perl-module\n\n";
- $d   .= 'S="${WORKDIR}/' . $stat->distribution . "\"\n";
- $d   .= 'DESCRIPTION="' . $stat->desc . "\"\n";
- $d   .= 'HOMEPAGE="' . $stat->uri . "\"\n";
- $d   .= 'SRC_URI="' . $stat->src . "\"\n";
- $d   .= "SLOT=\"0\"\n";
- $d   .= 'LICENSE="|| ( ' . join(' ', sort @{$stat->license}) . " )\"\n";
- $d   .= 'KEYWORDS="' . join(' ', sort @{$stat->keywords}) . "\"\n";
- $d   .= 'DEPEND="' . join("\n",
-  sort grep !$seen{$_}++, 'dev-lang/perl',
-                          map $self->_cpan2portage(@$_), @{$stat->deps}
- ) . "\"\n";
- $d   .= "SRC_TEST=\"do\"\n";
- $d   .= $stat->footer;
+ $file = $stat->ebuild_file;
 
- my $file = $stat->eb_file;
- open my $eb, '>', $file or return $FAIL->("open($file): $!");
- print $eb $d;
- close $eb;
+ # Create a placeholder ebuild to prevent recursion with circular dependencies.
+ {
+  open my $eb, '>', $file or return $FAIL->("open($file): $!");
+  print $eb "PLACEHOLDER\n";
+ }
 
  $stat->created(0);
  $stat->dist(undef);
 
  $self->SUPER::create(@_);
 
- if ($stat->do_manifest and not $self->update_manifest) {
-  1 while unlink $file;
-  return $FAIL->();
+ return $FAIL->() unless $stat->created;
+
+ {
+  open my $eb, '>', $file or return $FAIL->("open($file): $!");
+  my $source = $self->ebuild_source;
+  return $FAIL->() unless defined $source;
+  print $eb $source;
  }
 
+ return $FAIL->() if $stat->do_manifest and not $self->update_manifest;
+
  return $OK->();
 }
 
 =head2 C<update_manifest>
 
-Update the F<Manifest> file for the ebuild associated to the current dist object.
+Updates the F<Manifest> file for the ebuild associated to the current dist object.
 
 =cut
 
@@ -356,8 +622,8 @@ sub update_manifest {
  my $self = shift;
  my $stat = $self->status;
 
- my $file = $stat->eb_file;
- unless ($file and -e $file) {
+ my $file = $stat->ebuild_file;
+ unless (defined $file and -e $file) {
   return $self->_abort('The ebuild file is invalid or does not exist');
  }
 
@@ -367,49 +633,148 @@ sub update_manifest {
 
  $self->_notify('Adding Manifest entry for', $stat->distribution);
 
- return $self->_run([ 'ebuild', $stat->eb_file, 'manifest' ], 0);
+ return $self->_run([ 'ebuild', $file, 'manifest' ], 0);
+}
+
+=head2 C<ebuild_source>
+
+Returns the source of the ebuild for the current dist object, or C<undef> when one of the dependencies couldn't be mapped to an existing ebuild.
+
+=cut
+
+my $dep_tree_contains;
+{
+ my %seen;
+
+ $dep_tree_contains = sub {
+  my ($dist, $target) = @_;
+
+  return 0 if $seen{$dist};
+  local $seen{$dist} = 1;
+
+  for my $kid (@{ $dependencies{$dist} }) {
+   return 1 if $kid eq $target
+            or $dep_tree_contains->($kid, $target);
+  }
+
+  return 0;
+ }
+}
+
+sub ebuild_source {
+ my $self = shift;
+ my $stat = $self->status;
+
+ {
+  my $name = $stat->name;
+  my %recursive_kids = map { $_ => 1 }
+                        grep $dep_tree_contains->($_, $name),
+                         @{ $dependencies{$name} };
+  if (%recursive_kids) {
+   my (@requires, @recursive_requires);
+   for (@{ $stat->requires }) {
+    if ($recursive_kids{$_->[0]}) {
+     push @recursive_requires, $_;
+    } else {
+     push @requires, $_;
+    }
+   }
+   $stat->requires(\@requires);
+   $stat->recursive_requires(\@recursive_requires);
+  }
+ }
+
+ # We must resolve the deps now and not inside prepare because _cpan2portage
+ # has to see the ebuilds already generated for the dependencies of the current
+ # dist.
+
+ my (@configure_requires, @requires, @recursive_requires);
+
+ my @phases = (
+  [ configure_requires => \@configure_requires ],
+  [ requires           => \@requires           ],
+  [ recursive_requires => \@recursive_requires ],
+ );
+
+ push @requires, CPANPLUS::Dist::Gentoo::Atom->new(
+  category => 'dev-lang',
+  name     => 'perl',
+  version  => $stat->min_perl,
+ );
+
+ for (@phases) {
+  my ($phase, $list) = @$_;
+
+  for (@{ $stat->$phase }) {
+   my $atom = $self->_cpan2portage(@$_);
+   unless (defined $atom) {
+    $self->_abort(
+     "Couldn't find an appropriate ebuild for $_->[0] in the portage tree"
+    );
+    return;
+   }
+
+   push @$list, $atom;
+  }
+
+  @$list = CPANPLUS::Dist::Gentoo::Atom->fold(@$list);
+ }
+
+ my $d = $stat->header;
+ $d   .= "# Generated by CPANPLUS::Dist::Gentoo version $VERSION\n\n";
+ $d   .= 'MODULE_AUTHOR="' . $stat->author . "\"\ninherit perl-module\n\n";
+ $d   .= 'S="${WORKDIR}/' . $stat->distribution . "\"\n";
+ $d   .= 'DESCRIPTION="' . $stat->desc . "\"\n";
+ $d   .= 'HOMEPAGE="' . $stat->uri . "\"\n";
+ $d   .= 'SRC_URI="' . $stat->src . "\"\n";
+ $d   .= "SLOT=\"0\"\n";
+ $d   .= 'LICENSE="|| ( ' . join(' ', sort @{$stat->license}) . " )\"\n";
+ $d   .= 'KEYWORDS="' . join(' ', sort @{$stat->keywords}) . "\"\n";
+ $d   .= 'RDEPEND="' . join("\n", sort @requires) . "\"\n" if @requires;
+ $d   .= 'PDEPEND="' . join("\n", sort @recursive_requires) . "\"\n"
+                                                         if @recursive_requires;
+ $d   .= 'DEPEND="' . join("\n", '${RDEPEND}', sort @configure_requires) . "\"\n";
+ $d   .= "SRC_TEST=\"do\"\n";
+ $d   .= $stat->footer;
+
+ return $d;
 }
 
 sub _cpan2portage {
- my ($self, $name, $version) = @_;
+ my ($self, $dist_name, $dist_version) = @_;
 
- $name = CPANPLUS::Dist::Gentoo::Maps::name_c2g($name);
- my $ver;
- $ver = CPANPLUS::Dist::Gentoo::Maps::version_c2g($version) if defined $version;
+ my $name    = CPANPLUS::Dist::Gentoo::Maps::name_c2g($dist_name);
+ my $version = CPANPLUS::Dist::Gentoo::Maps::version_c2g($dist_name, $dist_version);
 
  my @portdirs = ($main_portdir, @{$self->status->portdir_overlay});
 
- for my $category (qw/virtual perl-core dev-perl perl-gcpan/, CATEGORY) {
-  my $atom = ($category eq 'virtual' ? 'perl-' : '') . $name;
+ for my $category (qw<virtual perl-core dev-perl perl-gcpan>, CATEGORY) {
+  my $name = ($category eq 'virtual' ? 'perl-' : '') . $name;
 
   for my $portdir (@portdirs) {
    my @ebuilds = glob File::Spec->catfile(
     $portdir,
     $category,
-    $atom,
-    "$atom-*.ebuild",
+    $name,
+    "$name-*.ebuild",
    ) or next;
 
-   if (defined $ver) { # implies that $version is defined
-    for (@ebuilds) {
-     my ($eb_ver) = /\Q$atom\E-v?([\d._pr-]+).*?\.ebuild$/;
-     return ">=$category/$atom-$ver"
-            if  defined $eb_ver
-            and CPANPLUS::Dist::Gentoo::Maps::version_gcmp($eb_ver, $ver) > 0;
-    }
-   } else {
-    return "$category/$atom";
-   }
-
+   my $last = reduce { $a < $b ? $b : $a } # handles overloading
+               map CPANPLUS::Dist::Gentoo::Atom->new_from_ebuild($_),
+                @ebuilds;
+   next if defined $version and $last < $version;
+
+   return CPANPLUS::Dist::Gentoo::Atom->new(
+    category => $last->category,
+    name     => $last->name,
+    version  => $version,
+    ebuild   => $last->ebuild,
+   );
   }
 
  }
 
- $self->_skip(
-  "Couldn't find an appropriate ebuild for $name in the portage tree"
- );
-
- return '';
+ return;
 }
 
 sub install {
@@ -418,7 +783,7 @@ sub install {
  my $conf = $self->parent->parent->configure_object;
 
  my $sudo = $conf->get_program('sudo');
- my @cmd = ('emerge', '=' . $stat->eb_name . '-' . $stat->eb_version);
+ my @cmd = ('emerge', '=' . $stat->ebuild_name . '-' . $stat->ebuild_version);
  unshift @cmd, $sudo if $sudo;
 
  my $success = $self->_run(\@cmd, 1);
@@ -433,7 +798,7 @@ sub uninstall {
  my $conf = $self->parent->parent->configure_object;
 
  my $sudo = $conf->get_program('sudo');
- my @cmd = ('emerge', '-C', '=' . $stat->eb_name . '-' . $stat->eb_version);
+ my @cmd = ('emerge', '-C', '=' . $stat->ebuild_name . '-' . $stat->ebuild_version);
  unshift @cmd, $sudo if $sudo;
 
  my $success = $self->_run(\@cmd, 1);
@@ -449,7 +814,10 @@ sub _run {
  my ($success, $errmsg, $output) = do {
   local $ENV{PORTDIR_OVERLAY}     = join ' ', @{$stat->portdir_overlay};
   local $ENV{PORTAGE_RO_DISTDIRS} = $stat->distdir;
-  run command => $cmd, verbose => $verbose;
+  IPC::Cmd::run(
+   command => $cmd,
+   verbose => $verbose,
+  );
  };
 
  unless ($success) {
@@ -486,9 +854,9 @@ sub _skip { shift->_notify(@_, '-- skipping') }
 
 Gentoo (L<http://gentoo.org>).
 
-L<CPANPLUS>, L<IPC::Cmd> (core modules since 5.9.5).
+L<CPANPLUS>, L<IPC::Cmd> (core modules since 5.9.5), L<Parse::CPAN::Meta> (since 5.10.1).
 
-L<Cwd>, L<Carp> (since perl 5), L<File::Path> (5.001), L<File::Copy> (5.002), L<File::Spec> (5.00405).
+L<Cwd>, L<Carp> (since perl 5), L<File::Path> (5.001), L<File::Copy> (5.002), L<File::Spec> (5.00405), L<List::Util> (5.007003).
 
 =head1 SEE ALSO
 
@@ -504,7 +872,8 @@ You can contact me by mail or on C<irc.perl.org> (vincent).
 
 =head1 BUGS
 
-Please report any bugs or feature requests to C<bug-cpanplus-dist-gentoo at rt.cpan.org>, or through the web interface at L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=CPANPLUS-Dist-Gentoo>.  I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.
+Please report any bugs or feature requests to C<bug-cpanplus-dist-gentoo at rt.cpan.org>, or through the web interface at L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=CPANPLUS-Dist-Gentoo>.
+I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.
 
 =head1 SUPPORT
 
@@ -514,13 +883,13 @@ You can find documentation for this module with the perldoc command.
 
 =head1 ACKNOWLEDGEMENTS
 
-The module is to some extend cargo-culted from L<CPANPLUS::Dist::Deb> and L<CPANPLUS::Dist::Mdv>.
+The module was inspired by L<CPANPLUS::Dist::Deb> and L<CPANPLUS::Dist::Mdv>.
 
 Kent Fredric, for testing and suggesting improvements.
 
 =head1 COPYRIGHT & LICENSE
 
-Copyright 2008-2009 Vincent Pit, all rights reserved.
+Copyright 2008,2009,2010 Vincent Pit, all rights reserved.
 
 This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.