source: project/gazette/hyde.scm

(use hyde hyde-atom environments regex)
(require-library regex)
(import irregex)

(define-hyde-environment live 
  (clean-before-build #f)
  (output-dir "/var/www/spiffy/gazette"))

(default-page-vars '(((: bos "issues/" (+ any) ".wiki")
                      (layouts "article.sxml" "default.sxml"))))

(link-shortcuts '((user   . "http://wiki.call-cc.org/users/~A")
                  (egg    . "http://wiki.call-cc.org/egg/~A")
                  (wiki   . "http://wiki.call-cc.org/~A")
                  (ticket . "http://bugs.call-cc.org/ticket/~A")
                  (manual . "http://wiki.call-cc.org/manual/~A")))

(define $ (environment-ref (page-eval-env) '$))

(define (page-updated page)
  (or ($ 'updated page) ($ 'date page)))

(define (sort-by pages accessor)
  (sort pages (lambda (p1 p2) (> (accessor p1) (accessor p2)))))

(define (pages-matching regex)
  (map cdr (filter (lambda (p) (irregex-match regex (car p)))
                   ((environment-ref (page-eval-env) 'pages)))))

(define (format-seconds seconds)
  (time->string (seconds->utc-time seconds) "%Y-%m-%d %z"))

(define (authors->sxml authors)
  `(,(car authors)
    ,@(if (null? (cdr authors)) 
          '()
          (map (lambda (author)
                 `(,(car author) (span (@ (class "author")) ,(cdr author))))
               (append (map (cut cons ", " <>) (butlast (cdr authors)))
                       `((" and " . ,(last authors))))))))

(for-each (lambda (binding)
            (apply environment-extend! (cons (page-eval-env) binding)))
          `((page-updated ,page-updated)
            (format-seconds ,format-seconds)
            (authors->sxml ,authors->sxml)
            (all-issues ,(lambda () 
                           (sort-by (pages-matching '(: "issues/" (+ num) ".wiki")) page-updated)))))