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5.10.1.4 Reorganize

1. For small projects, sometimes a single file suffices. Most of the time, though, I end up splitting code up into multiple files.
2. In this example, I might make
   • a file called utils.lisp,
   • a file called graphics.lisp, and
   • a file called web.lisp, and
   • update the system definition by quickproject to:

   (asdf:defsystem #:swatchblade
     :serial t
     :depends-on (#:vecto
                  #:hunchentoot)
     :components ((:file "package")
                  (:file "utils")
                  (:file "graphics")
                  (:file "web")
                  (:file "swatchblade")))
   

3. When the ‘:serial t’ option is present in the defsystem, files are compiled and loaded in order. You can get more complicated in expressing inter-file relationships, but I haven’t found it worth the trouble. I just organize my files so that functions and macros needed in later files are provided in earlier files.