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generator.ss
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generator.ss
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(library (generator)
(export read-repo
generate-repo
read-config
use-parent
use-child
use-appended
use-string-append
make-tag-pred
default-config
default-base
file-metadata
file-filename
file-date
file-title
config-title
make-latex-macros
make-katex-macros)
(import (wetd) (rnrs) (html) (util) (rnrs eval))
(define use-parent
(lambda (parent child) (or parent child)))
(define use-child
(lambda (parent child) (or child parent)))
(define use-appended
(lambda (parent child) (append (or child '()) (or parent '()))))
(define use-string-append
(lambda (parent child)
(string-append (or child "") (or parent ""))))
(define read-config
(lambda (alist key)
(cdr (or (assoc key alist) (cons #f #f)))))
;; rule function: parent -> child -> config
(define compose-config
(lambda (parent child rules)
(if (null? rules)
'()
(let* ((rule (car rules))
(other (compose-config parent child (cdr rules)))
(rule-f (cdr rule))
(key (car rule))
(merged (apply rule-f (read-config parent key) (read-config child key) '())))
(cons (cons key merged) other)))))
(define default-propagation-rules
`((latex-macros . ,use-appended)
(title . ,use-child)
(processors . ,use-appended)
(template . ,use-child)
(index-template . ,use-child)
(link . ,use-child)
(desc . ,use-child)
(preamble . ,use-string-append)
(date . ,use-child)))
(define make-tag-pred
(lambda (tag)
(lambda (x)
(and (pair? x) (equal? (car x) tag)))))
(define process-subtree
(lambda (config l)
(if (string? l) (list l) (map (lambda (x) (process config x)) l))))
(define make-simple-tag
(lambda (tag)
(lambda (config t)
`(,tag () ,(process-subtree config (cadr t))))))
(define h-proc
(lambda (config t)
`(,(string->symbol (string-append "h" (number->string (cadr t))))
()
,(process-subtree config (caddr t)))))
(define ol-proc (make-simple-tag 'ol))
(define document-proc (make-simple-tag 'article))
(define hr-proc
(lambda (config t)
`(hr ())))
(define figure-proc (make-simple-tag 'figure))
(define par-proc (make-simple-tag 'p))
(define img-proc
(lambda (config t)
`(img ((src . ,(cadr t))
(alt . ,(caddr t))))))
(define code-proc
(lambda (config t)
`(pre ()
((code ((class . ,(if (null? (cddr t)) "" (string-append "language-" (symbol->string (cadr t))))))
,(process-subtree config (if (null? (cddr t)) (cadr t) (caddr t))))))))
(define quote-proc (make-simple-tag 'blockquote))
(define item-proc (make-simple-tag 'li))
(define ul-proc (make-simple-tag 'ul))
(define sub-proc (make-simple-tag 'sub))
(define sup-proc (make-simple-tag 'sup))
(define st-proc (make-simple-tag 'del))
(define link-proc
(lambda (config t)
`(a ((href . ,(cadr t))) ,(process-subtree config (caddr t)))))
(define verb-proc (make-simple-tag 'code))
(define uline-proc (make-simple-tag 'u))
(define em-proc (make-simple-tag 'em))
(define s-proc (make-simple-tag 'strong))
(define math-proc
(lambda (config t)
`(span ((class . "math inline"))
,(process-subtree config (cadr t)))))
(define dmath-proc
(lambda (config t)
`(span ((class . "math display"))
,(process-subtree config (cadr t)))))
(define default-config
`((title . "default title")
(processors . ((,(make-tag-pred 'h) . ,h-proc)
(,(make-tag-pred 'ol) . ,ol-proc)
(,char? . ,(lambda (proc x) (string x)))
(,string? . ,(lambda (proc x) x))
(,(make-tag-pred 'document) . ,document-proc)
(,(make-tag-pred 'hr) . ,hr-proc)
(,(make-tag-pred 'figure) . ,figure-proc)
(,(make-tag-pred 'par) . ,par-proc)
(,(make-tag-pred 'img) . ,img-proc)
(,(make-tag-pred 'code) . ,code-proc)
(,(make-tag-pred 'quote) . ,quote-proc)
(,(make-tag-pred 'item) . ,item-proc)
(,(make-tag-pred 'ul) . ,ul-proc)
(,(make-tag-pred 'sub) . ,sub-proc)
(,(make-tag-pred 'sup) . ,sup-proc)
(,(make-tag-pred 'link) . ,link-proc)
(,(make-tag-pred 'verb) . ,verb-proc)
(,(make-tag-pred 'st) . ,st-proc)
(,(make-tag-pred 'uline) . ,uline-proc)
(,(make-tag-pred 'em) . ,em-proc)
(,(make-tag-pred 's) . ,s-proc)
(,(make-tag-pred 'math) . ,math-proc)
(,(make-tag-pred 'dmath) . ,dmath-proc)))))
(define read-repo
(lambda (path)
(let* ((metadata
(eval (read-datum-from-file (join-path path
"metadata.ss"))
(environment '(rnrs) '(generator) '(wetd) '(util) '(html) '(chezscheme))))
(propagation-rules (append (or (read-config metadata 'propagation-rules) '())
default-propagation-rules))
(config (compose-config default-config (cdr (assoc 'config metadata)) propagation-rules))
(files (cdr (assoc 'files metadata))))
`((config . ,config)
(files . ,(map (lambda (file)
`((filename . ,file)
(document-tree . ,(read-wetd-from-file (join-path path
(string-append file
".wetd"))))
(metadata . ,(compose-config config
(eval
(read-datum-from-file (join-path path
(string-append file
".wetd")))
(environment '(rnrs)
'(generator)
'(wetd)
'(util)
'(html)
'(chezscheme)))
propagation-rules))))
files))))))
(define file-filename
(lambda (file)
(cdr (assoc 'filename file))))
(define file-metadata
(lambda (file)
(cdr (assoc 'metadata file))))
(define file-date
(lambda (file)
(cdr (assoc 'date (file-metadata file)))))
(define file-title
(lambda (file)
(cdr (assoc 'title (file-metadata file)))))
(define file-template
(lambda (file)
(cdr (assoc 'template (file-metadata file)))))
(define file-document-tree
(lambda (file)
(cdr (assoc 'document-tree file))))
(define config-title
(lambda (config)
(cdr (assoc 'title config))))
(define default-base
(lambda (head body)
`(html ()
((head ()
((meta ((charset . "utf-8")))
(meta ((name . "viewport")
(content . "width=device-width, initial-scale=1")))
,@head))
(body ()
,body)))))
(define generate-index
(lambda (config files path)
(let ((port (open-file-output-port (join-path path "index.html")
(file-options no-fail)
'block
(make-transcoder (utf-8-codec)))))
(display "<!doctype html>" port)
(html>> ((cdr (assoc 'index-template config)) config files)
port)
(close-output-port port))))
(define generate-rss
(lambda (config files path)
(let ((port (open-file-output-port (join-path path "feed.xml")
(file-options no-fail)
'block
(make-transcoder (utf-8-codec)))))
(xml>> `(rss ((version . "2.0"))
((channel ()
((title () (,(cdr (assoc 'title config))))
(link () (,(cdr (assoc 'link config))))
(description () (,(cdr (assoc 'desc config))))
,@(map (lambda (file)
`(item ()
((title ()
(,(file-title file)))
(link ()
(,(string-append (cdr (assoc 'link config))
(file-filename file)
".html"))))))
files)))))
port)
(close-output-port port))))
(define process
(lambda (config tree)
((cdr (or (assp (lambda (pred) (pred tree)) (cdr (assoc 'processors config)))
(error 'process "unknown directive" tree))) config tree)))
(define generate-page
(lambda (config file path)
(let ((port (open-file-output-port (join-path path (string-append (file-filename file) ".html"))
(file-options no-fail)
'block
(make-transcoder (utf-8-codec)))))
(display "<!doctype html>" port)
(html>> ((file-template file)
(file-metadata file)
(process (file-metadata file) (file-document-tree file)))
port)
(close-output-port port))))
(define generate-repo
(lambda (repo path)
(let ((config (cdr (assoc 'config repo)))
(files (cdr (assoc 'files repo))))
(generate-index config files path)
(generate-rss config files path)
(for-each (lambda (file) (generate-page config file path)) files))))
(define make-latex-macros
(lambda (macros)
(apply string-append
(map (lambda (macro)
(if (= (cadr macro) 0)
(string-append "\\newcommand{"
(car macro)
"}{"
(caddr macro)
"}")
(string-append "\\newcommand{"
(car macro)
"}["
(number->string (cadr macro))
"]{"
(caddr macro)
"}")))
macros))))
(define make-katex-macros
(lambda (macros)
(string-append "{"
(join ", " (map (lambda (macro)
(string-append "\""
(string-escape (car macro))
"\": \""
(string-escape (caddr macro))
"\""))
macros))
"}"))))