Are you sure that data is not nil here?
 If so, this function returns nil.
dr. Hans van der Meer


On 6 Dec 2018, at 11:20, Procházka Lukáš Ing. <LPr@pontex.cz> wrote:

Hello,

I'm using the following code, mentioned here some time ago, to get some info about PDF:

----
\startluacode
figures.getinfo = function(name, page)
   if type(name) == "string" then
       name = { name = name, page = page }
   end
   if name.name then
       local data = figures.push(name)

       --figures.identify()
local ok, res = pcall(figures.identify)
print(">>1", ok, res)

       --figures.check()
local ok, res = pcall(figures.check)
print(">>2", ok, res)

       figures.pop()
       return data
   end
end

local data = figures.getinfo("NonExisting.pdf")

\stopluacode
----

The problem is that once the PDF file doesn't exist, the function causes ConTeXt to exit, even when I enclose 'figure.check()' into the 'pcall' (to be handled like try/catch mechanism).

Is there a way so that the function 'figures.getinfo()' does't exit ConTeXt, it just returns 'nil', or even gives info which directories (or even which file types) were searched?

TIA.

Best regards,

Lukas


--
Ing. Lukáš Procházka | mailto:LPr@pontex.cz
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