move prereqs to PREREQ_PM, *_REQUIRES conditional on EUMM version

diff --git a/Changes b/Changes
index 1364acc..f622dfd 100644 (file)
--- a/Changes
+++ b/Changes
@@ -1,5 +1,7 @@
 Revision history for Import-Into
 
+  - fix prerequisite declarations for older toolchain
+
 1.002003 - 2014-07-09
   - module loading is now done while importing, making it unnecessary to load
     them beforehand (RT#96995, Christian Walde)

diff --git a/Makefile.PL b/Makefile.PL
index f722619..95c4f76 100644 (file)
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -3,12 +3,11 @@ use warnings FATAL => 'all';
 use ExtUtils::MakeMaker;
 (do 'maint/Makefile.PL.include' or die $@) unless -f 'META.yml';
 
-WriteMakefile(
+my %WriteMakefileArgs = (
   NAME => 'Import::Into',
   VERSION_FROM => 'lib/Import/Into.pm',
   PREREQ_PM => { },
   LICENSE => 'perl',
-  MIN_PERL_VERSION => '5.006',
 
   META_MERGE => {
     'meta-spec' => { version => 2 },
@@ -25,12 +24,16 @@ WriteMakefile(
           web => 'https://rt.cpan.org/Public/Dist/Display.html?Name=Import-Into',
       },
     },
+  },
+
+  META_ADD => {
     prereqs => {
       runtime => {
         requires => {
           'strict' => '0',
           'warnings' => '0',
           'Module::Runtime' => '0',
+          'perl' => '5.006',
         },
       },
       test => {
@@ -45,3 +48,35 @@ WriteMakefile(
 
   realclean => { FILES => [ 'Distar/', 'MANIFEST*' ] },
 );
+
+my $eumm_version  = eval $ExtUtils::MakeMaker::VERSION;
+
+for (qw(configure build test runtime)) {
+  my $key = $_ eq 'runtime' ? 'PREREQ_PM' : uc $_.'_REQUIRES';
+  next unless exists $WriteMakefileArgs{META_ADD}{prereqs}{$_}
+           or exists $WriteMakefileArgs{$key};
+  my $r = $WriteMakefileArgs{$key} = {
+    %{$WriteMakefileArgs{META_ADD}{prereqs}{$_}{requires} || {}},
+    %{delete $WriteMakefileArgs{$key} || {}},
+  };
+  defined $r->{$_} or delete $r->{$_} for keys %$r;
+}
+
+# dynamic prereqs get added here.
+
+$WriteMakefileArgs{MIN_PERL_VERSION} = delete $WriteMakefileArgs{PREREQ_PM}{perl} || 0;
+
+$WriteMakefileArgs{BUILD_REQUIRES} = {
+    %{$WriteMakefileArgs{BUILD_REQUIRES} || {}},
+    %{delete $WriteMakefileArgs{TEST_REQUIRES}}
+} if $eumm_version < 6.63_03;
+
+$WriteMakefileArgs{PREREQ_PM} = {
+    %{$WriteMakefileArgs{PREREQ_PM}},
+    %{delete $WriteMakefileArgs{BUILD_REQUIRES}}
+} if $eumm_version < 6.55_01;
+
+delete $WriteMakefileArgs{CONFIGURE_REQUIRES}
+  if $eumm_version < 6.51_03;
+
+WriteMakefile(%WriteMakefileArgs);