#lang racket/base (provide (except-out (all-from-out racket/base) #%module-begin) (rename-out [new-module-begin #%module-begin])) (define-syntax-rule (new-module-begin body-exprs ...) (#%module-begin (module inner pollen/lang/doclang_raw ;; first three lines are positional arguments for doclang_raw main-raw ; id of export (λ(x) x) ; post-process function () ; prepended exprs (require pollen/lang/lang-helper) (require-project-require-files) (provide (all-defined-out)) ;; Change behavior of undefined identifiers (require pollen/top) (provide (all-from-out pollen/top)) ;; Build 'inner-here-path and 'inner-here (define inner-here-path (get-here-path)) (require (only-in pollen/world PROJECT_ROOT)) (require (only-in racket/path find-relative-path)) (require (only-in pollen/file-tools ->output-path)) (define inner-here (path->string (->output-path (find-relative-path PROJECT_ROOT inner-here-path)))) body-exprs ...) (require 'inner) ;; Split out the metas. We want to catch user-defined metas too. ;; First, append "here-path" and "here" as metas. ;; Because they might have been overridden by custom metas in the source. (require txexpr) (define one-with-everything `(placeholder-root (meta "here-path" ,inner-here-path) (meta "here" ,inner-here) ,@(cdr main-raw))) ;; cdr strips initial linebreak (define is-meta-element? (λ(x) (and (txexpr? x) (equal? 'meta (get-tag x))))) (define-values (main-without-metas meta-elements) (splitf-txexpr one-with-everything is-meta-element?)) (define meta-element->assoc (λ(x) (cons (cadr x) (caddr x)))) (define metas (make-hash (map meta-element->assoc meta-elements))) ;; set up the 'main export (define here-ext (car (regexp-match #px"\\w+$" inner-here-path))) (define wants-decoder? (member here-ext (list "pd" "ptree"))) (define main (apply (if wants-decoder? ;; 'root is the hook for the decoder function. ;; If it's not a defined identifier, it just hits #%top and becomes `(root ,@body ...) root ;; for textual (preprocessor-style) output. Converts x-expressions to HTML. (λ xs (apply string-append (map (dynamic-require 'xml 'xexpr->string) xs)))) (cdr main-without-metas))) ;; cdr strips placeholder-root tag ;; derive 'here & 'here-path from the hash (because they might have been overridden in the source) (define here (hash-ref metas "here")) (define here-path (hash-ref metas "here-path")) (provide metas main here here-path ;; hide the exports that were only for internal use. (except-out (all-from-out 'inner) inner-here inner-here-path main-raw #%top)) ;; for output in DrRacket (module+ main (if wants-decoder? (print main) (display main)))))