1 files changed, 20 insertions, 78 deletions

@@ -1,78 +1,20 @@
-;;; CHICKEN-SCRATCH --- heredocs for CHICKEN
-;; written by Case Duckworth <acdw@acdw.net> off an idea by evhan
-;; Licensed under BSD-3.  See COPYING for details.
-
-;; CHICKEN has "Multiline string constants with embedded expressions" syntax,
-;; which is basically shell here-doc syntax but schemier and with a real
-;; programming langugage to embed. evhan's beaker tool (which is great, btw)
-;; uses this facility to do a quick-and-dirty templating for wiki generation. I
-;; realized that I could use the same facility for the same kind of
-;; heredoc-style templating I have done in various other SSGs like unk and
-;; vienna, but with scheme. Thus, CHICKEN-SCRATCH was born.
-
-;; USAGE
-
-;; `expand-string' is the main entry point to this module. It takes a string and
-;; returns a string with all #( ... ) forms expanded according to the CHICKEN
-;; rules. `expand-port' is a port version of `expand-string'.
-
-;; To enable truly invisible definitions within the expanded string, the `def'
-;; macro is provided which performs a `set!' on its variables, then returns a
-;; string guaranteed not to be in the input string, which is then filtered out
-;; in the expanded string.
-
-;; Finally, to enable CHICKEN-SCRATCH to be used in a shebang, if the first line
-;; of the input string begins with #!, it's deleted from the input.
-
-(module chicken-scratch
-    (expand-string
-     expand-port
-     def
-     %def/replacer)
-
-  (import scheme
-          (chicken base)
-          (only (chicken io)
-                read-string)
-          (only (chicken irregex)
-                irregex-replace
-                irregex-replace/all
-                irregex-search)
-          (only (chicken port)
-                make-concatenated-port)
-          (only (chicken random)
-                pseudo-random-real))
-
-  (define %def/replacer (make-parameter #f))
-
-  (define (expand-string str)
-    (parameterize ((%def/replacer (random-string-not-in str)))
-      (let* ((delim (random-string-not-in str))
-             (template (make-concatenated-port
-                        (open-input-string (string-append "#<#" delim "\n"))
-                        (open-input-string (irregex-replace "^#!.*\n" str ""))
-                        (open-input-string (string-append "\n" delim "\n"))))
-             (expanded (open-output-string))
-             (output (begin
-                       (display (eval (read template)) expanded)
-                       (get-output-string expanded))))
-        (irregex-replace/all `(seq ,(%def/replacer) (* "\n"))
-                             output
-                             ""))))
-
-  (define (expand-port #!optional port)
-    (let ((port (or port (current-input-port))))
-      (expand-string (read-string #f port))))
-
-  (define-syntax def
-    (syntax-rules ()
-      ((def var val)
-       ;; I think this only works in CHICKEN.
-       (begin (set! var val)
-              (%def/replacer)))))
-
-  (define (random-string-not-in str)
-    (let ((attempt (number->string (pseudo-random-real))))
-      (if (irregex-search attempt str)
-          (random-string-not-in str)
-          attempt))))
+#!/bin/sh
+#| -*- scheme -*-
+exec csi -ss "$0" "$@"
+CHICKEN-SCRATCH: here-doc templating for CHICKEN scheme
+(C) Case Duckworth <acdw@acdw.net>
+License: BSD-3.  See COPYING for details.
+|#
+
+(import chicken-scratch
+        (chicken file)
+        (chicken process-context))
+
+(define (main args)
+  (for-each (lambda (file)
+              (when (file-exists? file)
+                (display (with-input-from-file file expand-port))
+                (newline)))
+            args))
+
+(main (command-line-arguments))