scope_guard: new perl module recipe

dev-perl/scope_guard/scope_guard-0.21.recipe

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+SUMMARY="Lexically-scoped resource management"
+DESCRIPTION="This module provides a convenient way to perform cleanup or other forms of resource \
+management at the end of a scope. It is particularly useful when dealing with exceptions: the \
+Scope::Guard constructor takes a reference to a subroutine that is guaranteed to be called even \
+if the thread of execution is aborted prematurely. This effectively allows lexically-scoped \
+\"promises\" to be made that are automatically honoured by perl's garbage collector."
+HOMEPAGE="https://metacpan.org/pod/Scope::Guard"
+COPYRIGHT="2005-2015, chocolateboy"
+LICENSE="Artistic"
+REVISION="1"
+SOURCE_URI="https://cpan.metacpan.org/authors/id/C/CH/CHOCOLATE/Scope-Guard-$portVersion.tar.gz"
+CHECKSUM_SHA256="8c9b1bea5c56448e2c3fadc65d05be9e4690a3823a80f39d2f10fdd8f777d278"
+SOURCE_DIR="Scope-Guard-$portVersion"
+
+ARCHITECTURES="any"
+
+PROVIDES="
+	scope_guard = $portVersion
+	"
+REQUIRES="
+	haiku
+	vendor_perl
+	"
+
+BUILD_REQUIRES="
+	haiku_devel
+	"
+BUILD_PREREQUIRES="
+	cmd:make
+	cmd:perl
+	"
+
+BUILD()
+{
+	perl Makefile.PL PREFIX=$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
+}