src/module-parse.lisp (code): Prepare for an additional variant.

[sod] / src / module-output.lisp

diff --git a/src/module-output.lisp b/src/module-output.lisp
index fe04f2b..f9eb3a4 100644 (file)
--- a/src/module-output.lisp
+++ b/src/module-output.lisp
@@ -212,6 +212,7 @@
 
    The output file name will be constructed by merging the module's pathname
    with PATHNAME."
 
    The output file name will be constructed by merging the module's pathname
    with PATHNAME."

+  (pushnew reason *output-types*)

   (setf (get reason 'output-type) pathname))
 
 (export 'output-type-pathname)
   (setf (get reason 'output-type) pathname))
 
 (export 'output-type-pathname)


@@ -246,6 +247,51 @@
                (make-pathname :directory nil
                               :defaults (module-name module)))))
 
                (make-pathname :directory nil
                               :defaults (module-name module)))))
 

+(export 'write-dependency-file)
+(defgeneric write-dependency-file (module reason output-dir)
+  (:documentation
+   "Write a dependency-tracking make(1) fragment.
+
+   Specifically, we've processed a MODULE for a particular REASON (a
+   symbol), and the user has requested that output be written to OUTPUT-DIR
+   (a pathname): determine a suitable output pathname and write a make(1)
+   fragment explaining that the output file we've made depends on all of the
+   files we had to read to load the module."))
+
+(defmethod write-dependency-file ((module module) reason output-dir)
+  (let* ((common-case
+         ;; Bletch.  We want to derive the filetype from the one we're
+         ;; given, but we need to determine the environment's preferred
+         ;; filetype case to do that.  Make a pathname and inspect it to
+         ;; find out how to do this.
+
+         (if (upper-case-p
+                          (char (pathname-type (make-pathname
+                                                :type "TEST"
+                                                :case :common))
+                                0))
+                         #'string-upcase
+                         #'string-downcase))
+
+        (outpath (output-type-pathname reason))
+        (deppath (make-pathname :type (concatenate 'string
+                                                   (pathname-type outpath)
+                                                   (funcall common-case
+                                                            "-DEP"))
+                                :defaults outpath))
+        (outfile (module-output-file module reason output-dir))
+        (depfile (module-output-file module deppath output-dir)))
+
+    (with-open-file (dep depfile
+                    :direction :output
+                    :if-exists :supersede
+                    :if-does-not-exist :create)
+      (format dep "### -*-makefile-*-~%~
+                  ~A:~{ \\~%   ~A~}~%"
+             outfile
+             (cons (module-name module)
+                   (module-files module))))))
+

 (define-clear-the-decks reset-output-types
   "Clear out the registered output types."
   (dolist (reason *output-types*) (remprop reason 'output-type))
 (define-clear-the-decks reset-output-types
   "Clear out the registered output types."
   (dolist (reason *output-types*) (remprop reason 'output-type))