Hi folks. I was wondering if there was a standard way of dealing with the following. If I have a YAML config file (for use with LuaTeX) with a relative path in my TeX file which I pass to a library function, that library function is going to think the path is relative to its location, which will in general give the wrong location. The obvious thing to do is to complete to an absolute path. Are there other options? Yes, I can provide an example. And I could maybe post to the site.
A popular approach for TeX is to to put the file in a location it will search for. But not sure how that would work a YAML config file. Will it search in those locations for any missing file whatsoever?
@FaheemMitha presumably you are looking forthe file along the tex input path (although hard to tell from your description) in which case the fact that it's yaml makes no difference and you can place it anywhere luatex would find tex files
@FaheemMitha as I say if you are using read or input then it's same as tex if you are calling kpathsea from Lua you can specify which search path it uses
@FaheemMitha it might (although you hadn't said you were calling from Lua, see my previous comment)
@DavidCarlisle Calling kpathsea from Lua? I don't know what that means. If I try to access a file by name in a Lua file, the question is whether it will search in those directories.
Anyway, I'll write an example.
This seems like an issue that will recur, though this is the first time I've encountered it for YAML.
@FaheemMitha Basically all input functions will interpret relative paths as relative to the current working directory, so unless you do something weird they will not be looked up relative to some library.
@FaheemMitha That's the directory you are in when invoking LuaTeX. Most likely that is the directory to which the top level TeX file belongs, but you could run LuaTeX from another path (this would probably break all relative paths in your document though, so it's usually not recommended). You could change the current directory from Lua though (which I also wouldn't recommend).
If you know a recent LaTeX is available then you only need to explicitly use
\usepackage{xparse}
If you want to use one of the features that were trialled in the xparse package but were not included in the final version (ltcmd) that was incorpoated into the format. Notably the g argument type. B...
Do we have a general question for using macro in TikZ? See tex.stackexchange.com/questions/12091/… and its linked questions. (there are all the information already, but it's a little hard to find stuff)
@JosephWright When multiple Separations colorspaces use the same name, then the code does not respect which colorspace was specified. Especially: In m3color002.lvt, TwoUp is defined to use BarToneCMYK, but it ends up using BarToneCIELAB instead. (Probably not an issue in real documents, but maybe something we should add a warning for?)
@JosephWright I tend to agree. While not PDF specific anymore, it's still about writing PDF or PS syntax, so it will not work with other backends and it feels like backend code.
Is there something in LaTeX for regex_replace, but use a function to expand the result? For instance I want to x-expand (or digest-expand, but this is probably harder) any `\E{...}` nested arbitrarily deep in some expression and substitute it back
Actually I can probably replace it with #something then push it into a function.
Although generally speaking, I think that some things that is currently done in the expansion engine (mostly the math stuff) could be implemented much faster in another programming language
PGF/TikZ doing arithmetic by manipulating them as string is terrible, for instance
In this recently posted example, it looks to me like the text inserted from the macro has more than usual whitespace to the left and right. Can anyone confirm that? And if so, what can one do about it?
@user202729 tex only has character tokens though, it has no numeric literals in the sense understood by programing languages so maipulating things always comes down to "strings of characters in the end"
@JosephWright yes but even there still aren't any integer literals \count0=123 might look like that but 123 is three tokens it's not a single token as it would be in ... most other things
@FaheemMitha yes anywhere, You have been using tex for long enough to see at least one of egreg's answers surely (90% of his rep comes from telling people to put a % at ends of lines)
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@FaheemMitha I wouldn't use a binary lua module (and shell-escape) just to read a list of key:value pairs, shell-escape is a tool of last resort really. You could read it with a simple lua (or tex) loop, unless you really need a fully conformant yaml parser for all the edge cases of yaml syntax
@DavidCarlisle Actually, I'm not sure if -shell-escape is needed. I added that out of habit, really. Since one is not actually writing anything other than the usual PDF.
@user202729 true but if you stick to the intended use of integer arithmetic (adding 1 to a section number every page or so) then it does it fast enough/
@FaheemMitha but it's not really good form to post code on the internet and ask people to run it with shell-escape enabled. It gives you access to their entire machine with whatever permissions they have. that code could do anything.
@FaheemMitha same reason it has shell-escape, you can make it default to unrestricted on your own installation but that can't be a general default (or good idea) a compiled lua module can do anything
@DavidCarlisle Well, it only calls two Lua packages, both of which are well known, though not part of Lua. And would normally be distribution packages. At least they are for Debian.
I wonder if all of TeX Live has been audited for malicious code. It's a dangerous world out there.
@DavidCarlisle Ah yes, I see. Thank you for answering my question.
I'm reminded of this daily, because my email host sucks, and I get wagonloads of emails trying to infect my system. At least, I assume that's what they are trying to do.
@DavidCarlisle Anyway, that code will simply not work without the external YAML Lua module/library, at least. If you have suggestions on how to make it safer (reduce the number of paths?) let me know.
It would be good if Lua included more libraries by default, and then perhaps things would be safer, but it doesn't.
As far as I know, Debian has had no extreme examples of malicious code injection, though there was a kerfuffle some years ago. Someone added some code they shouldn't have.
@MarcelKrüger theoretically yes. They sent me a message for the recording link, but in this one the actual link is missing, but I asked for a resent and will forward. I will also sent you the slides. It made me wonder about the technique we are using for color fonts. He suggested type3 but this is not what we are doing aren't we?
@PauloCereda I still have my 2002 iMac G4. Haven't booted it in a long time.
@PauloCereda I really loved that particular design and wish it would come back somehow.
I've been spending a lot of time lately creating my own LaTeX3 examples and a lot of the programming philosophy is making sense now. I still have a few problems manipulating sequences and clists.
I can create correctly named functions with the programming layer and use them from the document layer.
@DavidCarlisle I seriously want to do something to help the LaTeX Project in some capacity.
@DavidCarlisle I plan to continue evangelizing LaTeX use in introductory physics courses and to my academic friends in general who can't understand why using \left...\right everywhere is bad.
\setmathfont{Latin Modern Math}[version=bold,math-style=ISO,FakeBold = 3]
makes the following not compile
with error
Missing character: There is no 𝛽 (U+1D6FD) in font cmr10!
\documentclass{article}
\tracinglostchars=3 % Make it an error if a glyph is missing from the current font \usepackage[english, bidi = basic, layout = lists]{babel} \usepackage{fontspec} % For \defaultfontfeatures
@Diaa I get multiple error before that. eg ! LaTeX3 Error: Invalid operation fp_to_decimal(inf)
@Diaa ah no sorry if I comment out the ScheherazadeNew references as I don't have that font then the error you show is the first
@Diaa a more reasonable test example is:
\documentclass{article}
\tracinglostchars=3 % Make it an error if a glyph is missing from the current font
\usepackage{fontspec} % For \defaultfontfeatures
\usepackage[bold-style=TeX]{unicode-math}
\setmathfont{Latin Modern Math}[version=bold,math-style=ISO]
\begin{document}
$\beta$
\end{document}
\documentclass{article}
\tracinglostchars=3 % Make it an error if a glyph is missing from the current font
\usepackage{unicode-math}
\setmathfont{Latin Modern Math}[version=bold]
\begin{document}
$\beta$
\end{document}
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