more robust and future-proof architecture

Rakefile

@@ -1,7 +1,33 @@
 require 'squib'
+require 'rake/clean'
 
-task default: [:deck]
+CLEAN.include('_output/*').exclude('_output/gitkeep.txt')
+CLEAN.include('_graphics/*')
 
-task :deck do
-  load 'deck.rb'
+task default: [:pnp]
+
+task all: [:debug, :showcase, :pnp, :full]
+
+task :pnp do
+  Squib.enable_build_globally :pnp
+  load 'src/deck.rb'
+  Squib.disable_build_globally :pnp
+end
+
+task :debug do
+  Squib.enable_build_globally :debug
+  load 'src/deck.rb'
+  Squib.disable_build_globally :debug
+end
+
+task :showcase do
+  Squib.enable_build_globally :showcase
+  load 'src/deck.rb'
+  Squib.disable_build_globally :showcase
+end
+
+task :full do
+  Squib.enable_build_globally :full
+  load 'src/deck.rb'
+  Squib.disable_build_globally :full
 end