* Re: XML Lua engine in ConTeXt
2013-03-05 9:59 XML Lua engine in ConTeXt Procházka Lukáš Ing. - Pontex s. r. o.
@ 2013-03-05 10:38 ` Thomas A. Schmitz
2013-03-05 10:54 ` Hans Hagen
1 sibling, 0 replies; 3+ messages in thread
From: Thomas A. Schmitz @ 2013-03-05 10:38 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 03/05/2013 10:59 AM, Procházka Lukáš Ing. - Pontex s. r. o. wrote:
> which XML processing Lua engine is used by ConTeXt?
>
> There are more XML processors developed for Lua - LuaXML, LuaExpat etc.
>
> Does ConTeXt use one of these or another, or its own - a built-in one?
>
> As I'm processing XML tables with pure Lua, too, I'd like to use only
> one engine in pure Lua scripts and within ConTeXt;
> I believe it could be possible.
Hans can give the authoritative answer, of course, but if you look into
http://www.pragma-ade.com/general/manuals/mk.pdf , chapter XVII, you
will see that he has indeed written his own parser, based on lpeg, and
not used any of the lua libraries (I'm not a programmer, so take my word
with a ton of salt, but I had a look at them and found them truly awful,
compared to what, e.g., python and perl have to offer).
Thomas
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* Re: XML Lua engine in ConTeXt
2013-03-05 9:59 XML Lua engine in ConTeXt Procházka Lukáš Ing. - Pontex s. r. o.
2013-03-05 10:38 ` Thomas A. Schmitz
@ 2013-03-05 10:54 ` Hans Hagen
1 sibling, 0 replies; 3+ messages in thread
From: Hans Hagen @ 2013-03-05 10:54 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 3/5/2013 10:59 AM, Procházka Lukáš Ing. - Pontex s. r. o. wrote:
> Hello,
>
> which XML processing Lua engine is used by ConTeXt?
>
> There are more XML processors developed for Lua - LuaXML, LuaExpat etc.
>
> Does ConTeXt use one of these or another, or its own - a built-in one?
Its own (1) because there was none and (2) because we want full control
over the two-way interface.
> As I'm processing XML tables with pure Lua, too, I'd like to use only
> one engine in pure Lua scripts and within ConTeXt;
> I believe it could be possible.
Just use the one that is built in context mkiv. You can load the xml
parser code in regular Lua code that you write. Here is the most recent
list of reasonable defaults:
"l-lua.lua",
"l-lpeg.lua",
"l-function.lua",
"l-string.lua",
"l-table.lua",
"l-io.lua",
"l-number.lua",
"l-set.lua",
"l-os.lua",
"l-file.lua", -- limited functionality when no lfs
"l-md5.lua", -- not loaded when no md5 library
"l-url.lua",
"l-dir.lua", -- limited functionality when no lfs
"l-boolean.lua",
"l-unicode.lua",
"l-math.lua",
"util-tab.lua",
"util-sto.lua",
"util-str.lua",
"util-mrg.lua",
"util-prs.lua",
"trac-inf.lua",
"trac-set.lua",
"trac-log.lua",
"util-tpl.lua",
"util-env.lua",
"lxml-tab.lua",
"lxml-lpt.lua",
"lxml-mis.lua",
"lxml-aux.lua",
"lxml-xml.lua",
If you cannot use mtxrun --script <yourscript> for some reason, you can
load these files explicitly. In one of the upcoming betas I'll add a
script that I use for some months now that permits you to build a merged
lib out of these (and more) that then can be includes with one require
call (and put alongside whatever code you use). The advantage is that
you then have a sort of snapshot. (I use that approach in for instance
web services.) Think of:
lua mtxlibs.lua --selfmerge my-used-libs.lua trac-lmx util-jsn
util-sql util-sql-imp-client util-sql-imp-library util-sql-sessions
util-sql-tickets util-sql-loggers util-sql-users util-sql-logins
This produces my-used-libs.lua which on top of the list above adds some
more to it. You then only need to require this one lib and can avoid
dependencies, path mess, etc.
Hans
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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
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