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-rw-r--r--macros/latex/base/ltfilehook.dtx93
1 files changed, 54 insertions, 39 deletions
diff --git a/macros/latex/base/ltfilehook.dtx b/macros/latex/base/ltfilehook.dtx
index c7ed13f041..b4f716748a 100644
--- a/macros/latex/base/ltfilehook.dtx
+++ b/macros/latex/base/ltfilehook.dtx
@@ -31,8 +31,8 @@
%%% From File: ltfilehook.dtx
%
% \begin{macrocode}
-\providecommand\ltfilehookversion{v1.0d}
-\providecommand\ltfilehookdate{2020/11/24}
+\providecommand\ltfilehookversion{v1.0e}
+\providecommand\ltfilehookdate{2021/01/07}
% \end{macrocode}
%
%<*driver>
@@ -514,7 +514,6 @@
% \begin{macro}{
% \@@_file_parse_full_name:nN,
% \@@_full_name:nn,
-% \@@_set_curr_file_assign:nnnNN
% }
% A utility macro to trigger \pkg{expl3}'s file-parsing and lookup,
% and return a normalized representation of the file name. If the
@@ -711,14 +710,33 @@
%<latexrelease> {\InputIfFileExists}{Hook management (files)}%
%<*2ekernel|latexrelease>
% \end{macrocode}
-%
+%
% \begin{macrocode}
\let\InputIfFileExists\@undefined
\DeclareRobustCommand \InputIfFileExists[2]{%
\IfFileExists{#1}%
{%
- \@expl@@@filehook@file@push@@
- \@filehook@set@CurrentFile
+ \@expl@@@filehook@file@push@@
+ \@filehook@set@CurrentFile
+% \end{macrocode}
+% We pre-expand \cs{@filef@und} so that in case another file is
+% loaded in the true branch of \cs{InputIfFileExists}, these don't
+% change their value meanwhile. This isn't a worry with
+% \cs[no-index]{CurrentFile...} because they are kept in a stack.
+%
+% \changes{v1.0d}{2020/11/20}
+% {Move loading to \cs{@input@file@exists@with@hooks} and expand
+% \cs{@filef@und} to avoid getting the wrong file name in the case of
+% a substitution.}
+% \begin{macrocode}
+ \expandafter\@swaptwoargs\expandafter
+ {\expandafter\@input@file@exists@with@hooks
+ \expandafter{\@filef@und}}%
+ {#2}%
+ \@expl@@@filehook@file@pop@@
+ }%
+}
+\def\@input@file@exists@with@hooks#1{%
% \end{macrocode}
% If the file exists then \cs{CurrentFile} holds its name. But we
% can't rely on that still being true after the file has been
@@ -740,32 +758,16 @@
% the file name and extension are returned so that file hooks can
% refer to the file by their name only. The path to the file is
% returned in \cs{CurrentFilePath}.
+% \changes{v1.0e}{2021/01/07}{Restore \cs[no-index]{CurrentFile(Path)(Used)}
+% after the input (gh/464)}
% \begin{macrocode}
- \edef\reserved@a{%
- \@expl@@@filehook@file@pop@assign@@nnnn
- {\CurrentFilePathUsed}%
- {\CurrentFileUsed}%
- {\CurrentFilePath}%
- {\CurrentFile}%
-% \end{macrocode}
-%
-% We pre-expand \cs{@filef@und} so that in case another file is
-% loaded in the true branch of \cs{InputIfFileExists}, these don't
-% change their value meanwhile. This isn't a worry with
-% \cs[no-index]{CurrentFile...} because they are kept in a stack.
-%
-% \changes{v1.0d}{2020/11/20}
-% {Move loading to \cs{@input@file@exists@with@hooks} and expand
-% \cs{@filef@und} to avoid getting the wrong file name in the case of
-% a substitution.}
-% \begin{macrocode}
- \noexpand\@input@file@exists@with@hooks{\@filef@und}}%
- \expandafter\@swaptwoargs\expandafter
- {\reserved@a}%
- {#2}%
- \@expl@@@filehook@file@pop@@
- }%
-}
+ \edef\reserved@a{%
+ \@expl@@@filehook@file@pop@assign@@nnnn
+ {\CurrentFilePathUsed}%
+ {\CurrentFileUsed}%
+ {\CurrentFilePath}%
+ {\CurrentFile}}%
+ \expandafter\@swaptwoargs\expandafter{\reserved@a}%
% \end{macrocode}
%
% Before adding to the file list we need to make all (letter) characters
@@ -787,18 +789,19 @@
% approach (grepping the packages in \TeX{} Live didn't bring up any
% obvious candidate for breaking with this catcode change).
% \begin{macrocode}
-\def\@input@file@exists@with@hooks#1{%
- \edef\reserved@a{\unqu@tefilef@und#1\@nil}%
- \@addtofilelist{\string@makeletter\reserved@a}%
- \UseHook{file/before}%
+ {\edef\reserved@a{\unqu@tefilef@und#1\@nil}%
+ \@addtofilelist{\string@makeletter\reserved@a}%
+ \UseHook{file/before}%
% \end{macrocode}
% The current file name is available in \cs{CurrentFile} so we use
% that in the specific hook.
% \begin{macrocode}
- \UseHook{file/before/\CurrentFile}%
- \@@input #1% <- trailing space comes from \@filef@und
+ \UseHook{file/before/\CurrentFile}%
+ \@@input #1% <- trailing space comes from \@filef@und
+ }%
% \end{macrocode}
-% And it is restored here so we can use it once more.
+% And here, \cs{CurrentFile} is restored
+% (by \cs{@expl@@@filehook@file@pop@assign@@nnnn}) so we can use it once more.
% \begin{macrocode}
\UseHook{file/after/\CurrentFile}%
\UseHook{file/after}}
@@ -1488,10 +1491,22 @@
% \begin{macrocode}
\ExplSyntaxOff
% \end{macrocode}
-%
+%
+% This one specifically has to be undefined because it is left over in
+% the input stream from \cs{InputIfFileExists} and executed when
+% \pkg{latexrelease} is loaded. It cannot be \cs{let} to \cs{@undefined}
+% otherwise it would error as well, so it is \cs{let} to \cs{relax} to
+% be silently ignored when loading \cs{latexrelease}.
+% \changes{v1.0e}{2021/01/07}{Added rollback for this case to avoid
+% spurious errors (part of gh/463)}
% \begin{macrocode}
%</2ekernel|latexrelease>
%<latexrelease>\EndIncludeInRelease
+%<latexrelease>
+%<latexrelease>\IncludeInRelease{0000/00/00}%
+%<latexrelease> {\@expl@@@filehook@if@no@extension@@nTF}{2e tmp interfaces}%
+%<latexrelease>\let\@expl@@@filehook@file@pop@@\relax
+%<latexrelease>\EndIncludeInRelease
%<*2ekernel>
% \end{macrocode}
%