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%D \module
%D [ file=core-uti,
%D version=2006.09.19,
%D title=\CONTEXT\ Core Macros,
%D subtitle=Utility File Handling,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\unprotect
\registerctxluafile{core-uti}{1.001}
%D We need a way to pass strings safely to \LUA\ without the
%D need for tricky escaping. Compare:
%D
%D \starttyping
%D \ctxlua {something("anything tricky can go here")}
%D \ctxlua {something([\luastringsep[anything tricky can go here]\luastringsep])}
%D \stoptyping
\def\luastringsep{===} % this permits \typefile{self} otherwise nested b/e sep problems
\edef\!!bs{[\luastringsep[}
\edef\!!es{]\luastringsep]}
%D We have a the following available as primitive so there is no need
%D for it:
%D
%D \starttyping
%D \long\edef\luaescapestring#1{\!!bs#1\!!es}
%D \stoptyping
%D Next we implement a few helpers:
\newwrite\utility@tua
\prependtoks
\def \writeutilitytua {\write\utility@tua}
\def\immediatewriteutilitytua{\immediate\write\utility@tua}
\to \everyjob
\let \writeutilitytua\gobbleoneargument
\let\immediatewriteutilitytua\gobbleoneargument
\appendtoks
\immediate\openout\utility@tua=\jobname.tua
\immediatewriteutilitytua{-- file\space\space\space: \jobname}%
\immediatewriteutilitytua{-- format\space: \contextformat}%
\immediatewriteutilitytua{-- stamp\space\space: \contextversion}%
\immediatewriteutilitytua{-- escape\space: \!!bs\space...\space\!!es}%
\immediatewriteutilitytua{-- version: \utilityversion}%
\immediatewriteutilitytua{}%
\immediatewriteutilitytua{do}%
\immediatewriteutilitytua{if job and job.version and not job.version == "\utilityversion" then return end}%
\immediatewriteutilitytua{if not job then job = { } end}%
\immediatewriteutilitytua{job.version = "\utilityversion"}%
\to \everyopenutilities
\appendtoks
\immediatewriteutilitytua{end}%
%immediate\closeout\utility@tua
\to \everycloseutilities
% The next file can be in lua or luc format:
\appendtoks
\ctxlua { do
if not job then job = { } end
job.version = "\utilityversion"
local settings = loadfile("\jobname.tuc")
if settings then settings() end
end}%
\to \everyjob
% variables
\appendtoks
\immediatewriteutilitytua{if not job.variables then job.variables = { } end}%
\to \everyopenutilities
\def\savecurrentvalue#1#2%
{\immediatewriteutilitytua{job.initializevariable("\strippedcsname#1","#2")}}
% temp
\let\thisisbytesequence\gobbleoneargument
% wrong place but we need to have it someplace
\appendtoks
\ctxlua{input.storage.dump()}%
\to \everydump
\appendtoks
\ctxlua{input.storage.finalize()}%
\to \everyfinalizeluacode
\protect \endinput
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