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(* Copyright (c) 2011, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
structure Tutorial :> TUTORIAL = struct
fun readAll' inf =
let
fun loop acc =
case TextIO.inputLine inf of
NONE => Substring.full (String.concat (rev acc))
| SOME line => loop (line :: acc)
in
loop []
before TextIO.closeIn inf
end
fun readAll fname = readAll' (TextIO.openIn fname)
fun doUr fname =
let
val eval = TextIO.openOut "/tmp/eval.ur"
val gen = TextIO.openOut "/tmp/gen.ur"
fun untilEnd source =
let
val (befor, after) = Substring.position "(* end *)" source
in
if Substring.isEmpty after then
(source, Substring.full "")
else
(befor, Substring.slice (after, 9, NONE))
end
fun doDirectives (count, source) =
let
val safe = String.translate (fn #"<" => "<"
| #"&" => "&"
| #"{" => "{"
| #"(" => "("
| #"\n" => "(*NL*)\n"
| ch => str ch) o Substring.string
val (befor, after) = Substring.position "(* begin " source
fun default () = (TextIO.outputSubstr (eval, source);
TextIO.output (gen, safe source))
in
if Substring.isEmpty after then
default ()
else
let
val (command, after) = Substring.splitl (not o Char.isSpace) (Substring.slice (after, 9, NONE))
in
if Substring.isEmpty after then
default ()
else
let
val (_, rest) = Substring.position "*)" after
in
if Substring.isEmpty rest then
default ()
else
let
val (arg, source) = untilEnd (Substring.slice (rest, 3, NONE))
val () = (TextIO.outputSubstr (eval, befor);
TextIO.output (gen, safe befor))
val (count, skip) =
case Substring.string command of
"hide" => (TextIO.outputSubstr (eval, arg);
(count, true))
| "eval" => (TextIO.output (eval, "val _eval");
TextIO.output (eval, Int.toString count);
TextIO.output (eval, " = ");
TextIO.outputSubstr (eval, arg);
TextIO.output (eval, "\n\n");
TextIO.output (gen, safe arg);
TextIO.output (gen, "== {[_eval");
TextIO.output (gen, Int.toString count);
TextIO.output (gen, "]}");
(count + 1, false))
| s => raise Fail ("Unknown tutorial directive: " ^ s)
in
doDirectives (count, if skip then
#2 (Substring.splitl Char.isSpace source)
else
source)
end
end
end
end
in
doDirectives (0, readAll fname);
TextIO.closeOut gen;
TextIO.output (eval, "\n\nfun main () : transaction page =\nreturn <xml><body>");
TextIO.outputSubstr (eval, readAll "/tmp/gen.ur");
TextIO.output (eval, "</body></xml>");
TextIO.closeOut eval;
if Compiler.compile "/tmp/eval" then
let
val proc = Unix.execute ("/bin/sh", ["-c", "/tmp/eval.exe /main"])
val inf = Unix.textInstreamOf proc
val s = readAll' inf
val _ = Unix.reap proc
val (befor, after) = Substring.position "<sc>" s
in
if Substring.isEmpty after then
print ("Bad output for " ^ fname ^ "! [1]\n")
else
let
val after = Substring.slice (after, 4, NONE)
val (befor, after) = Substring.position "</body>" after
in
if Substring.isEmpty after then
print ("Bad output for " ^ fname ^ "! [2]\n")
else
let
val outf = TextIO.openOut "/tmp/final.ur"
fun eatNls source =
let
val (befor, after) = Substring.position "(*NL*)" source
in
if Substring.isEmpty after then
TextIO.outputSubstr (outf, source)
else
(TextIO.outputSubstr (outf, befor);
eatNls (Substring.slice (after, 6, NONE)))
end
val cmd = "emacs --eval \"(progn "
^ "(global-font-lock-mode t) "
^ "(add-to-list 'load-path \\\""
^ Config.sitelisp
^ "/\\\") "
^ "(load \\\"urweb-mode-startup\\\") "
^ "(urweb-mode) "
^ "(find-file \\\"/tmp/final.ur\\\") "
^ "(switch-to-buffer (htmlize-buffer)) "
^ "(write-file \\\""
^ OS.Path.mkAbsolute {relativeTo = OS.FileSys.getDir (),
path = OS.Path.joinBaseExt {base = OS.Path.base fname, ext = SOME "html"}}
^ "\\\") "
^ "(kill-emacs))\""
in
eatNls befor;
TextIO.closeOut outf;
ignore (OS.Process.system cmd)
end
end
end
else
()
end
fun make dirname =
let
val dir = OS.FileSys.openDir dirname
fun doDir () =
case OS.FileSys.readDir dir of
NONE => OS.FileSys.closeDir dir
| SOME fname =>
(if OS.Path.ext fname = SOME "ur" then
doUr (OS.Path.joinDirFile {dir = dirname, file = fname})
else
();
doDir ())
in
Settings.setProtocol "static";
doDir ()
end
end
|
