[NTG-context] \savebuffer to merge of save contents

21 Mar 2017

      Hello ConTeXist.

Is there any possibility or modifications that will allow to savebuffer to work, so that will add (merge) the buffer contents into a file (Which content of the previous buffer)?

For inspiration, it is possible use a solution that wrote before year ago Wolfgang for Lukas Prochazka – ie https://mailman.ntg.nl/pipermail/ntg-context/2016/087657.html

Thanx
Jaroslav Hajtmar

Here is source code of Wolfgangs solution:

\unexpanded\def\startcontentexport
   {\dosingleempty\dostartcontentexport}

\def\dostartcontentexport[#1]%
   {\iffirstargument
      \edef\contentexportfile{#1}%
    \else
      \let\contentexportfile\empty
    \fi
    \grabbufferdata[contentexport][startcontentexport][stopcontentexport]}

\def\stopcontentexport

{\doifsomething{\contentexportfile}{\savebuffer[list=contentexport,prefix=no,file=\contentexportfile]}%
    \getbufferdata[contentexport]}

\starttext

A

\startcontentexport[Test.mkiv]
   Basic content …
   \startitemize
     \item Item
   \stopitemize
\stopcontentexport

B

\startcontentexport[Test.mkiv]
   Add this text into Test.mkiv file
   \startitemize
     \item Item
   \stopitemize
\stopcontentexport

C

\startcontentexport[Test.mkiv]
  And this text add into Test.mkiv file too.
   \startitemize
     \item Item
   \stopitemize
\stopcontentexport

\stoptext