Implement basic site generation from .md

1 files changed, 100 insertions, 0 deletions

diff --git a/app.scm b/app.scm
new file mode 100644
index 0000000..7b22dbf
--- /dev/null
+++ b/app.scm
@@ -0,0 +1,100 @@
+(import (chicken base)
+	utf8
+	spiffy
+	nrepl
+	srfi-18
+	(chicken file)
+	(chicken io)
+	(chicken port)
+	(chicken format)
+	(chicken pretty-print)
+	lowdown
+	sxml-transforms
+	matchable
+	(chicken irregex)
+	shell
+	srfi-13
+	intarweb
+	html-parser)
+
+(define (pipe x . fns)
+  (match fns
+    [() x]
+    [(fn . rest) (apply pipe (fn x) rest)]))
+
+;; Convenience macro (@ expr ...) that expands to (lambda (x) (expr ... x))
+(define-syntax @
+  (syntax-rules ()
+    ((_ fn-body expr ...)
+     (lambda (x) (fn-body expr ... x)))))
+
+(define (replace from to str)
+  (irregex-replace/all from str to))
+
+(define (html-unescape html)
+  (pipe html
+	(@ replace """ "\"")
+	(@ replace "'" "'")
+	(@ replace "&" "&")
+	(@ replace "&lt;" "<")
+	(@ replace "&gt;" ">")))
+
+(define (highlight ext code)
+  (define tmp-file-path (create-temporary-file ext))
+  (with-output-to-file tmp-file-path
+    (lambda () (display code)))
+  (define result (capture ,(format "highlight ~A -O html -f" tmp-file-path)))
+  (delete-file tmp-file-path)
+  result)
+
+(define (replace-code-block content return)
+  (define irx (irregex "^%lang (\\S+)%\\n?" 's))
+  (define lang-match
+    (irregex-search irx content))
+  (if (not lang-match)
+      (return content))
+
+  (define lang
+    (irregex-match-substring lang-match 1))
+
+  (pipe content
+	(@ replace irx "")
+	(@ html-unescape)
+	(@ highlight lang)
+	(@ string-trim-both)))
+
+(define (convert-md-to-html filepath)
+  (with-output-to-string
+    (lambda () (markdown->html (open-input-file filepath)))))
+
+(define (highlight-code-blocks html)
+  (define (highlight-match m)
+    (format "<code>~A</code>"
+	    (call/cc (@ replace-code-block (irregex-match-substring m 1)))))
+
+  (irregex-replace/all (irregex "<code>(.*?)</code>" 's) html
+		       highlight-match))
+
+(define (insert-to-page-tmpl tmpl-path html)
+  (format (read-string #f (open-input-file tmpl-path))
+	  html))
+
+(define (app c)
+  (define html-text
+    (pipe "article.md"
+	  (@ convert-md-to-html)
+	  (@ highlight-code-blocks)
+	  (@ insert-to-page-tmpl "index.html")))
+
+  (send-response body: html-text
+		 headers: '((content-type #(text/html ((charset . utf-8)))))))
+
+(thread-start!
+ (lambda ()
+   (print "starting nrepl on port 1234")
+   (nrepl-prompt (lambda () (display "#;0> ")))
+   (nrepl 1234)))
+
+(vhost-map `((".*" . ,(lambda (c) (app c)))))
+
+(start-server)