X-Git-Url: https://git.distorted.org.uk/~mdw/skel/blobdiff_plain/d18fb0e729613723f0549d25e922d26421374142..e37dd246bdc763df5bfa57459de449aca1da0ecc:/skelrc

diff --git a/skelrc b/skelrc
index 045075b..67ffd1a 100644
--- a/skelrc
+++ b/skelrc
@@ -1,5 +1,13 @@
 ;;; -*-emacs-lisp-*-
 
+(defun skelrc-dribble (msg &rest args)
+  "Write MSG (a `format'-style string, with ARGS) to the debug buffer."
+  (let ((buffer (get-buffer "*skel-debug*")))
+    (and buffer
+	 (with-current-buffer buffer
+	   (goto-char (point-max))
+	   (insert (apply #'format msg args) "\n")))))
+
 (defun skelrc-strip-trailing-whitespace (string)
   "Return STRING, but with trailing whitespace removed.
 
@@ -54,6 +62,23 @@ its chosen major-mode before calling `skel-include'."
   (let ((val (assq key alist)))
     (and val (cdr val))))
 
+(defun skelrc-expand-text (text)
+  "Return the result of expanding TEXT in the current context.
+
+The context is extended with any new associations formed during
+the expansion."
+  (let* ((alist skel-alist)
+	 (expanded (with-temp-buffer
+		     (let ((skel-alist alist))
+		       (insert text)
+		       (goto-char (point-min))
+		       (skelrc-dribble "before: alist = `%s'" skel-alist)
+		       (skel-do-fill-in)
+		       (setq alist skel-alist)
+		       (buffer-string)))))
+    (setq skel-alist alist)
+    expanded))
+
 (defun skelrc-prefix-lines (prefix lines)
   "Return LINES, each with PREFIX prepended to the beginning.
 
@@ -70,6 +95,28 @@ the PREFIX is removed."
       (forward-line))
     (buffer-string)))
 
+(defun skelrc-prefix-and-reflow (prefix text)
+  "Return LINES, reflowed to `fill-column', with PREFIX at the start."
+  (let ((expanded-prefix (skelrc-expand-text prefix))
+	(expanded-text (skelrc-expand-text text))
+	(col (string-to-number (skel-lookup 'fill-column))))
+    (with-temp-buffer
+      (let* ((fill-prefix expanded-prefix)
+	     (paragraph-start (concat (skelrc-strip-trailing-whitespace
+				       (regexp-quote expanded-prefix))
+				      "[ \t\f]*$"))
+	     (paragraph-separate paragraph-start)
+	     (fill-column col))
+
+	(insert (skelrc-prefix-lines expanded-prefix expanded-text))
+
+	(goto-char (point-min))
+	(while (< (point) (point-max))
+	  (fill-paragraph)
+	  (forward-paragraph))
+
+	(buffer-string)))))
+
 (defun skelrc-component ()
   "Return a suitable a `This file is part of ...' line."
   (if (assq 'full-title skel-alist)