prevent version incompatibilities leading to "JSON::XS::Boolean::* redefined" warnings

[p5sagit/JSON-MaybeXS.git] / Makefile.PL

diff --git a/Makefile.PL b/Makefile.PL
index f316895..b18aa4b 100644 (file)
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -77,6 +77,19 @@ $WriteMakefileArgs{PREREQ_PM}{'Cpanel::JSON::XS'} = '2.3310'
         and ((eval { require Cpanel::JSON::XS; 1 } and not eval { Cpanel::JSON::XS->VERSION('2.3310'); 1 })
             or (not eval { require JSON::XS; 1; } and can_xs()));
 
+# avoid "JSON::XS::Boolean::* redefined" warnings caused by incompatibilities
+# between JSON::XS 2.x and 3.0 --
+# if JSON::XS is installed and < 3.0
+# and Cpanel::JSON::JSON is (or is about to be) >= 3.0,
+# then update JSON::XS to eliminate the incompatibility
+$WriteMakefileArgs{PREREQ_PM}{'JSON::XS'} = '3.00'
+    if not parse_args()->{PUREPERL_ONLY}
+        and eval { require JSON::XS; 1 } and not eval { JSON::XS->VERSION('3.0'); 1 }
+        and (eval { require Cpanel::JSON::XS; Cpanel::JSON::XS->VERSION('3.0'); 1 }
+            # we presume here that if we are installing Cpanel::JSON::XS, we
+            # are installing the latest version
+            or exists $WriteMakefileArgs{PREREQ_PM}{'Cpanel::JSON::XS'});
+
 $WriteMakefileArgs{MIN_PERL_VERSION} = delete $WriteMakefileArgs{PREREQ_PM}{perl} || 0;
 
 die 'attention developer: you need to do a sane meta merge here!'