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-rw-r--r--macros/latex/required/firstaid/latex2e-first-aid-for-external-files.dtx54
1 files changed, 52 insertions, 2 deletions
diff --git a/macros/latex/required/firstaid/latex2e-first-aid-for-external-files.dtx b/macros/latex/required/firstaid/latex2e-first-aid-for-external-files.dtx
index 09c32101be..384242e82c 100644
--- a/macros/latex/required/firstaid/latex2e-first-aid-for-external-files.dtx
+++ b/macros/latex/required/firstaid/latex2e-first-aid-for-external-files.dtx
@@ -110,8 +110,8 @@
% \end{macrocode}
%
% \begin{macrocode}
-\def\LaTeXFirstAidDate{2020/10/25}
-\def\LaTeXFirstAidVersion{v1.0g}
+\def\LaTeXFirstAidDate{2020/10/29}
+\def\LaTeXFirstAidVersion{v1.0h}
% \end{macrocode}
%
% \begin{macrocode}
@@ -346,6 +346,56 @@
%
%
%
+%
+% \subsection{The \pkg{pgfpages} and \pkg{pgfmorepages} first aid}
+%
+% \pkg{pgfpages} alters the \cs{shipout} primitive to support
+% multiple page up scenarios. If used together with \pkg{atbegshi}
+% that worked because the alterations done by \pkg{atbegshi} came
+% later and so used the new definition provide by
+% \pkg{pgfpages}. Now that the code from \pkg{atbegshi} is already
+% in the kernel this further redefinition doesn't happen with the
+% result that the change to \cs{shipout} comes to late and
+% breaks the kernel processes.
+%
+% \begin{macrocode}
+\ExplSyntaxOn
+\AddToHook{file/after/pgfpages.sty}[firstaid]{%
+% \end{macrocode}
+% Undo overwriting \cs{shipout}:
+% \begin{macrocode}
+ \cs_gset_eq:NN \shipout \pgfpages@originalshipout
+% \end{macrocode}
+% Instead overwrite the L3 programming layer name of the
+% primitive. This is really an absolute no-go, but for now the
+% simplest solution to keep the original code running.
+%
+% It will be replaced when the ``configuration points'' interface
+% for \LaTeX{} becomes available. At that point the package will be
+% able to set up a different strategy for doing shipouts and
+% without the need to overrite a primitive (which it did in the
+% past and which we do below) and then this code here can be taken
+% out again.
+% \begin{macrocode}
+ \cs_set_eq:NN \pgfpages@originalshipout \tex_shipout:D
+ \cs_set_eq:NN \tex_shipout:D \pgfpages@interceptshipout
+}
+\ExplSyntaxOff
+% \end{macrocode}
+%
+% Same issue with \pkg{pgfmorepages}.
+%
+% \begin{macrocode}
+\ExplSyntaxOn
+\AddToHook{file/after/pgfmorepages.sty}[firstaid]{%
+ \cs_gset_eq:NN \shipout \pgfpages@originalshipout
+ \cs_set_eq:NN \pgfpages@originalshipout \tex_shipout:D
+ \cs_set_eq:NN \tex_shipout:D \pgfpages@interceptshipout
+}
+\ExplSyntaxOff
+% \end{macrocode}
+%
+%
% \subsection[Temporary fixes for the kernel (until the next
% patch-level release)]
% {Temporary fixes for the kernel \\