Re: buffer question

On Thu, 16 Apr 2026, Jim via ntg-context wrote:

> So... is there some way to get a parameter value (pageHeight in this
> example) into the buffer contents?
> 
> (I realize I can create Yet Another buffer MyPrePreamble which defines a
> macro (or sets a dimen) to the desired value and call
>         \typesetbuffer[MyPrePreamble,MyPreamble,content]
> but I was wondering if there was something a bit more elegant.)

Just do everything in lua:

\starttext

\startluacode
local preamble = [[
  \definepapersize[ShowAndTypeset]
                  [width=%width%, height=%height%];
  \setuppapersize[ShowAndTypeSet]
]]

local options={width="5cm", height="10cm"}
local parsed = utilities.templates.replace(preamble, options)

context.tobuffer("MyPreamble", parsed)
\stopluacode

\typebuffer[MyPreamble]

\stoptext

Aditya
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