keep module dependencies in sync

diff --git a/t/00dependencies.t b/t/00dependencies.t
new file mode 100644 (file)
index 0000000..ac53bf0
--- /dev/null
+++ b/t/00dependencies.t
@@ -0,0 +1,79 @@
+#!/usr/bin/env perl
+
+use warnings;
+use strict;
+
+=head1 DESCRIPTION
+
+Makes sure that all of the modules that are 'use'd are listed in the
+Makefile.PL as dependencies.
+
+=cut
+
+use Test::More;
+use File::Find;
+eval 'use Module::CoreList';
+if ($@) { plan skip_all => 'Module::CoreList not installed' }
+
+plan 'no_plan';
+
+my %used;
+find( \&wanted, qw/ lib t / );
+
+sub wanted {
+    return unless -f $_;
+    return if $File::Find::dir  =~ m!/.git($|/)!;
+    return if $File::Find::name =~ /~$/;
+    return if $File::Find::name =~ /\.(pod|html)$/;
+
+    # read in the file from disk
+    my $filename = $_;
+    local $/;
+    open( FILE, $filename ) or return;
+    my $data = <FILE>;
+    close(FILE);
+
+    # strip pod, in a really idiotic way.  Good enough though
+    $data =~ s/^=head.+?(^=cut|\Z)//gms;
+
+    # look for use and use base statements
+    $used{$1}{$File::Find::name}++ while $data =~ /^\s*use\s+([\w:]+)/gm;
+    while ( $data =~ m|^\s*use base qw.([\w\s:]+)|gm ) {
+        $used{$_}{$File::Find::name}++ for split ' ', $1;
+    }
+}
+
+my %required;
+{
+    local $/;
+    ok( open( MAKEFILE, "Makefile.PL" ), "Opened Makefile" );
+    my $data = <MAKEFILE>;
+    close(FILE);
+    while ( $data =~ /^\s*?(?:requires|recommends|).*?([\w:]+)'(?:\s*=>\s*['"]?([\d\.]+)['"]?)?.*?(?:#(.*))?$/gm ) {
+        $required{$1} = $2;
+        if ( defined $3 and length $3 ) {
+            $required{$_} = undef for split ' ', $3;
+        }
+    }
+}
+
+for ( sort keys %used ) {
+    my $first_in = Module::CoreList->first_release($_);
+    next if defined $first_in and $first_in <= 5.00803;
+    next if /^(Text::Tradition|inc|t)(::|$)/;
+
+    #warn $_;
+    ok( exists $required{$_}, "$_ in Makefile.PL" )
+        or diag( "used in ", join ", ", sort keys %{ $used{$_} } );
+    delete $used{$_};
+    delete $required{$_};
+}
+
+for ( sort keys %required ) {
+    my $first_in = Module::CoreList->first_release( $_, $required{$_} );
+    fail("Required module $_ (v. $required{$_}) is in core since $first_in")
+        if defined $first_in and $first_in <= 5.008003;
+}
+
+1;
+