add px (null source) files; change template to pt; move fallback template

file-tools.rkt

@@ -116,6 +116,9 @@
   (any/c . -> . coerce/boolean?)
   (and (pathish? x) (has-ext? (->path x) PREPROC_SOURCE_EXT)))
 
+(define+provide/contract (has-null-source? x)
+  (any/c . -> . coerce/boolean?)
+  (and (pathish? x) (file-exists? (->null-source-path (->path x)))))
 
 (define+provide/contract (has-preproc-source? x)
   (any/c . -> . coerce/boolean?)
@@ -136,6 +139,11 @@
   ; or a file (e.g., html) that has a pollen source file
   (and (pathish? x) (ormap (λ(proc) (proc (->path x))) (list decoder-source? has-decoder-source?))))
 
+(define+provide/contract (needs-null? x)
+  (any/c . -> . coerce/boolean?)
+  ; it's a null source file, or a file that's the result of a null source
+  (and (pathish? x) (ormap (λ(proc) (proc (->path x))) (list null-source? has-null-source?))))
+
 
 (define+provide/contract (ptree-source? x)
   (any/c . -> . coerce/boolean?)
@@ -144,7 +152,12 @@
 
 (define+provide/contract (decoder-source? x)
   (any/c . -> . coerce/boolean?)
-  (and (pathish? x) (has-ext? x DECODER_SOURCE_EXT)))
+  (and (pathish? x) ((->path x) . has-ext? . DECODER_SOURCE_EXT)))
+
+
+(define+provide/contract (null-source? x)
+  (any/c . -> . coerce/boolean?)
+  (and (pathish? x) ((->path x) . has-ext? . NULL_SOURCE_EXT)))
 
 
 (define+provide/contract (template-source? x)
@@ -163,9 +176,15 @@
       x
       (add-ext x PREPROC_SOURCE_EXT)))
 
+(define+provide/contract (->null-source-path x)
+  (coerce/path? . -> . coerce/path?)
+  (if (decoder-source? x)
+      x
+      (add-ext x NULL_SOURCE_EXT)))
+
 (define+provide/contract (->output-path x)
   (coerce/path? . -> . coerce/path?)
-  (if (or (decoder-source? x) (preproc-source? x))
+  (if (or (decoder-source? x) (preproc-source? x) (null-source? x))
       (remove-ext x)
       x))
 

pollen-server-extras/fallback.html.pt

@@ -0,0 +1 @@
+◊(->html (html (head (meta 'charset: "UTF-8")) (body "Rendered without template:" (hr) main)))

render.rkt

@@ -98,6 +98,7 @@
   (define (&render x) 
     (let ([path (->complete-path x)])              
       (cond
+        [(needs-null? path) (render-null-source path #:force force)]
         [(needs-preproc? path) (render-preproc-source-if-needed path #:force force)]
         [(needs-template? path) (render-with-template path #:force force)]
         [(ptree-source? path) (let ([ptree (cached-require path 'main)])
@@ -119,6 +120,15 @@
 (define (up-to-date-message path)
   (message (->string (file-name-from-path path)) "is up to date, using cached copy"))
 
+(define (render-null-source path #:force force)
+  ;; this op is trivial & fast, so do it every time.
+  (define source-path (->complete-path (->null-source-path path)))
+  (define output-path (->complete-path (->output-path path)))
+  (message (format "Copying ~a to ~a" 
+                             (file-name-from-path source-path)
+                             (file-name-from-path output-path)))
+  (copy-file source-path output-path #t))
+
 (define (render-preproc-source source-path output-path)
   ;; how we render: import 'main from preproc source file, 
   ;; which is rendered during source parsing, and write that to output path
@@ -187,10 +197,10 @@
                        (let ([source-metas (cached-require source-path 'metas)])
                          (and (TEMPLATE_META_KEY . in? . source-metas)
                               (build-path source-dir (get source-metas TEMPLATE_META_KEY))))) ; path based on metas
-                     (build-path source-dir 
-                                 (add-ext DEFAULT_TEMPLATE_PREFIX (get-ext (->output-path source-path))))))) ; path using default template
+                     (report (build-path source-dir 
+                                 (add-ext (add-ext DEFAULT_TEMPLATE_PREFIX (get-ext (->output-path source-path))) TEMPLATE_EXT)))))) ; path using default template
      (let ([ft-path (build-path source-dir FALLBACK_TEMPLATE)]) ; if none of these work, make fallback template file
-       (display-to-file fallback-template-data ft-path #:exists 'replace)
+       (copy-file (build-path (current-server-extras-path) FALLBACK_TEMPLATE) ft-path #t)
        ft-path)))
   
   (render template-path #:force force-render) ; bc template might have its own preprocessor source
@@ -227,10 +237,10 @@
          racket/match
          pollen/debug
          pollen/decode
-         pollen/file-tools
+         ;;         pollen/file-tools
          ;; not pollen/main, because it brings in pollen/top
          pollen/lang/inner-lang-helper
-         pollen/predicates
+         pollen/predicates ;; exports file-tools
          pollen/ptree
          pollen/cache
          sugar
@@ -259,7 +269,6 @@
                 racket/match
                 pollen/debug
                 pollen/decode
-                pollen/file-tools
                 pollen/lang/inner-lang-helper
                 pollen/predicates
                 pollen/ptree
@@ -297,12 +306,15 @@
   
   (render-through-eval source-dir string-to-eval))
 
+#|
 (module+ main
   (parameterize ([current-cache (make-cache)]
                  [CURRENT_PROJECT_ROOT (string->path "/Users/mb/git/bpt")])
     (render-source-with-template
      (string->path "/Users/mb/git/bpt/test.html.pm")
      (string->path "/Users/mb/git/bpt/-test.html"))))
+|#
+
 
 
 (define (render-files-in-ptree ptree #:force [force #f])    

server-routes.rkt

@@ -163,7 +163,7 @@
     (define possible-sources 
       (if (directory-exists? fn)
           empty ;; folders don't have source files
-          (filter file-in-dir? (list (->preproc-source-path filename) (->decoder-source-path filename)))))
+          (filter file-in-dir? (list (->preproc-source-path filename) (->decoder-source-path filename) (->null-source-path filename)))))
     (define source (and (not (empty? possible-sources)) (->string (car possible-sources))))
     `(tr ,@(map make-link-cell 
                 (append (list                          

server.rkt

@@ -24,14 +24,16 @@
 
 (message "Ready to rock")
 
-(define MODULE_ROOT (apply build-path (drop-right (explode-path (current-contract-region)) 1)))
-(define SERVER_EXTRAS_DIR (build-path MODULE_ROOT "pollen-server-extras"))
+(current-module-root (apply build-path (drop-right (explode-path (current-contract-region)) 1)))
+(current-server-extras-path (build-path (current-module-root) "pollen-server-extras"))
 
-(parameterize ([current-cache (make-cache)])
+(parameterize ([current-module-root (current-module-root)]
+               [current-server-extras-path (current-server-extras-path)]
+               [current-cache (make-cache)])
   (serve/servlet pollen-servlet
                  #:port SERVER_PORT
                  #:listen-ip #f
                  #:servlet-regexp #rx"" ; respond to top level
                  #:command-line? #t
                  #:file-not-found-responder route-404
-                 #:extra-files-paths (list SERVER_EXTRAS_DIR (CURRENT_PROJECT_ROOT))))
+                 #:extra-files-paths (list (current-server-extras-path) (CURRENT_PROJECT_ROOT))))

template.rkt

@@ -9,9 +9,6 @@
 (require sugar/scribble sugar/coerce)
 (provide (all-from-out sugar/scribble sugar/coerce))
 
-;; todo: better fallback template
-
-(define fallback-template-data "FALLBACK! ◊(main)")
 
 ;; todo: docstrings for this subsection
 

world.rkt

@@ -8,6 +8,7 @@
 
 (define PREPROC_SOURCE_EXT 'p)
 (define DECODER_SOURCE_EXT 'pm)
+(define NULL_SOURCE_EXT 'px)
 (define PTREE_SOURCE_EXT 'ptree)
 (define DECODABLE_EXTENSIONS (list DECODER_SOURCE_EXT PTREE_SOURCE_EXT))
 
@@ -18,8 +19,9 @@
 (define EXPRESSION_DELIMITER #\◊)
 (define TEMPLATE_FIELD_DELIMITER EXPRESSION_DELIMITER)
 
-(define DEFAULT_TEMPLATE_PREFIX "-main")
-(define FALLBACK_TEMPLATE "-temp-fallback-template.html")
+(define DEFAULT_TEMPLATE_PREFIX "main")
+(define TEMPLATE_EXT 'pt)
+(define FALLBACK_TEMPLATE "fallback.html.pt")
 (define TEMPLATE_META_KEY "template")
 
 (define MAIN_POLLEN_EXPORT 'main)
@@ -51,3 +53,6 @@
 
 (define DASHBOARD_NAME "index.ptree")
 (define DASHBOARD_CSS "poldash.css")
+
+(define current-module-root (make-parameter #f))
+(define current-server-extras-path (make-parameter #f))