Re: Adding load-only source files to ASDF

Gary King <[email protected]> writes:

> Load-only source files seems to be a perennial ASDF request. The  
> patch below purports to add load-only Common Lisp source files to  
> ASDF. One can create a system file with them either by using the new  
> class "interpreted-cl-source-file" or by using the keyword :load-only- 
> p. For example, both of the files in the below would only be loaded,  
> not compiled:
>
> (asdf:defsystem test5
>    :components
>    ((:module "deps"
> 	    :pathname "."
> 	    :components
> 	    ((:interpreted-cl-source-file "file1")
> 	     (:file "file2" :load-only-p t)))))
>
> If no-one sees any problems with this, I'll commit it soon.

Why have both a class and a slot?  The lack of a writer suggests that
you don't expect the value to change once an instance is created; why
not have just the class?

In fact, if you're willing to use just a class, I think you can
implement the functionality as an extension using asdf's protocols:

(defclass load-only-cl-source-file (cl-source-file)
  ())

(defmethod perform ((o compile-op) (c load-only-cl-source-file))
  nil)

(defmethod output-files ((o compile-op) (c load-only-cl-source-file))
  nil)

(defmethod input-files ((o load-op) (c load-only-cl-source-file))
  (list (component-pathname c)))

I named the class "load-only-cl-source-file" because asdf doesn't
control whether an implementation's LOAD interprets or compiles the
file.  I'm not certain that this implements everything necessary; it
does everything the documentation calls for except for adding method
to EXPLAIN, and does seem to work for a system with two files that
merely print output when compiled and loaded.

I'm all for including features that people find useful in asdf.lisp
itself, however.

Just my two cents,
RmK


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