[latex3-commits] [git/LaTeX3-latex3-latex2e] gh479: Add undo-module code from FMi (e2f7b059)

[PhelypeOleinik]

Repository : https://github.com/latex3/latex2e
On branch  : gh479
Link       : https://github.com/latex3/latex2e/commit/e2f7b059f289f601bee5e419835b2197cc720ceb

>---------------------------------------------------------------

commit e2f7b059f289f601bee5e419835b2197cc720ceb
Author: PhelypeOleinik <phelype.oleinik at latex-project.org>
Date:   Wed Mar 10 16:15:23 2021 -0300

    Add undo-module code from FMi


>---------------------------------------------------------------

e2f7b059f289f601bee5e419835b2197cc720ceb
 base/ltvers.dtx | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/base/ltvers.dtx b/base/ltvers.dtx
index 776a4700..210aceb0 100644
--- a/base/ltvers.dtx
+++ b/base/ltvers.dtx
@@ -243,13 +243,21 @@
                 {There is an \string\EndIncludeRelease\space missing}%
   \@includeinreleasefalse
   \fi
-  \ifx\EndModuleRelease#1%
-    \expandafter\EndModuleRelease
+  \ifnum 0=\expandafter\@parse at version#1//00\@nil\relax
+    \expandafter\expandafter\expandafter\finish at module@release
     \expandafter\@gobblefour
   \fi
   \kernel at ifnextchar[%
   {\@IncludeInRelease{#1}}
   {\@IncludeInRelease{#1}[#1]}}
+\long\def\finish at module@release#1#2#3\EndModuleRelease{%
+  \ifnum\expandafter\@parse at version\new at moduledate//00\@nil
+       >\expandafter\@parse at version\fmtversion//00\@nil
+    \GenericInfo{}{Undoing module \new at modulename\space
+      (\new at moduledate)}%
+    #3%
+  \fi
+  \EndModuleRelease}
 %    \end{macrocode}
 %
 % If a specific date has not been specified in |latexrelease|