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