Packaging backends.

src/context.cr

@@ -1,10 +1,40 @@
 
+class Package::Backend::Packaging
+	getter name : String
+
+	def initialize(@name, &block : Proc(Package, Bool))
+		@callback = block
+	end
+
+	def package(package : Package)
+		@callback.call package
+	end
+end
+
 class Package::Context
 	property working_directory = "/tmp/package"
 	property sources_directory = Dir.current
 	property packages_directory = Dir.current
 
+	@packaging_backends = [] of Backend::Packaging
+
 	def initialize
+		@packaging_backends << Backend::Packaging.new "pkgutils" do |package|
+			puts "#{package.fake_root_directory} -> #{packages_directory}/#{package.name}##{package.version}.pkg.tar.xz"
+			pp! r = run package.fake_root_directory, "tar", ["cJf", "#{packages_directory}/#{package.name}##{package.version}.pkg.tar.xz", "."]
+
+			r.exit_status == 0
+		end
+
+		@selected_packaging_backend = @packaging_backends[0]
+	end
+
+	def packaging_backend=(name : String)
+		@selected_packaging_backend = @packaging_backends.find(&.name.==(name)).not_nil!
+	end
+
+	def packaging_backend=(backend : Backend::Packaging)
+		@selected_packaging_backend = backend
 	end
 
 	def run(chdir, command, args)
@@ -20,10 +50,7 @@ class Package::Context
 	end
 
 	def package(package : Package) : Bool
-		puts "#{package.fake_root_directory} -> #{packages_directory}/#{package.name}##{package.version}.pkg.tar.xz"
-		pp! r = run package.fake_root_directory, "tar", ["cJf", "#{packages_directory}/#{package.name}##{package.version}.pkg.tar.xz", "."]
-
-		r.exit_status == 0
+		@selected_packaging_backend.package package
 	end
 end
 

src/main.cr

@@ -6,6 +6,8 @@ extend Package
 
 # FIXME: recipe.clean? context autoclean?
 Context.new().tap do |context|
+	context.packaging_backend = "pkgutils"
+
 	# FIXME: context.new_recipe? context.recipe?
 	Recipe.new(context, "hello", "2.10").tap do |recipe|
 		recipe.sources << "https://ftp.gnu.org/gnu/hello/hello-2.10.tar.gz"