class_singleton: new perl module recipe

dev-perl/class_singleton/class_singleton-1.6.recipe

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+SUMMARY="Implementation of a \"Singleton\" class"
+DESCRIPTION="This is the Class::Singleton module. A Singleton describes an object class that can \
+have only one instance in any system. An example of a Singleton might be a print spooler or \
+system registry. This module implements a Singleton class from which other classes can be \
+derived. By itself, the Class::Singleton module does very little other than manage the \
+instantiation of a single object. In deriving a class from Class::Singleton, your module will \
+inherit the Singleton instantiation method and can implement whatever specific functionality is \
+required."
+HOMEPAGE="https://metacpan.org/pod/Class::Singleton"
+COPYRIGHT="1998 Canon Research Centre Europe Ltd.
+1998-2008 Andy Wardley
+2014, 2020 Steve Hay"
+LICENSE="Artistic"
+REVISION="1"
+SOURCE_URI="https://cpan.metacpan.org/authors/id/S/SH/SHAY/Class-Singleton-$portVersion.tar.gz"
+CHECKSUM_SHA256="27ba13f0d9512929166bbd8c9ef95d90d630fc80f0c9a1b7458891055e9282a4"
+SOURCE_DIR="Class-Singleton-$portVersion"
+
+ARCHITECTURES="any"
+
+PROVIDES="
+	class_singleton = $portVersion
+	"
+REQUIRES="
+	haiku
+	vendor_perl
+	"
+
+BUILD_REQUIRES="
+	haiku_devel
+	"
+BUILD_PREREQUIRES="
+	cmd:make
+	cmd:perl
+	"
+
+BUILD()
+{
+	perl Makefile.PL PREFIX=$prefix
+	make
+}
+
+INSTALL()
+{
+	make pure_install
+
+	# remove architecture-specific files
+	cd $prefix
+	rm -r $(perl -V:vendorarch | cut -d\' -f2 | cut -d/ -f5-)
+		# cut extracts the quoted string and strips the prefix (which is perl's and not ours)
+}
+
+TEST()
+{
+	make test
+}