1 files changed, 68 insertions, 0 deletions
diff --git a/gen-cpanfile.pl b/gen-cpanfile.pl
new file mode 100644
index 000000000..26b3ab326
--- /dev/null
+++ b/gen-cpanfile.pl
@@ -0,0 +1,68 @@
+#!/usr/bin/perl
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This Source Code Form is "Incompatible With Secondary Licenses", as
+# defined by the Mozilla Public License, v. 2.0.
+
+# This file has detailed POD docs, do "perldoc checksetup.pl" to see them.
+
+######################################################################
+# Initialization
+######################################################################
+
+use 5.10.1;
+use strict;
+use warnings;
+use lib qw(lib local/lib/perl5);
+use Getopt::Long qw(:config gnu_getopt);
+
+if (-f "MYMETA.json") {
+    eval {
+        require CPAN::Meta;
+        require Module::CPANfile;
+
+        my (@with_feature, @without_feature);
+        my $with_all_features = 0;
+        GetOptions(
+            'with-all-features|A!' => \$with_all_features,
+            'with-feature|D=s@'    => \@with_feature,
+            'without-feature|U=s@' => \@without_feature
+        );
+
+
+        my $meta = CPAN::Meta->load_file("MYMETA.json");
+
+        my @phases = qw(configure build test develop runtime);
+        my @types  = qw(requires recommends suggests conflicts);
+
+        my %features;
+        if ($with_all_features) {
+            $features{$_->identifier} = 1 foreach ($meta->features);
+        }
+        $features{$_} = 1 foreach @with_feature;
+        $features{$_} = 0 foreach @without_feature;
+        my @features = grep { $features{$_} } keys %features;
+
+        my $prereqs = $meta->effective_prereqs(\@features)->as_string_hash;
+        my $filtered = {};
+
+        while (my($phase, $types) = each %$prereqs) {
+            while (my($type, $reqs) = each %$types) {
+                $filtered->{$phase}{$type} = $reqs;
+            }
+        }
+
+        my $cpanfile = Module::CPANfile->from_prereqs($filtered);
+        open my $cpanfile_fh, '>', 'cpanfile' or die "cannot write to cpanfile: $!";
+        print $cpanfile_fh $cpanfile->to_string();
+        close $cpanfile_fh;
+    };
+    die "Unable generate cpanfile: $@\n" if $@;
+}
+else {
+    die "MYMETA.yml is missing, cannot generate cpanfile\n";
+}
+
+