Only define local expl3 code if we haven't loaded expl3.ltx

Author: brucemiller

lib/LaTeXML/Engine/expl3.pool.ltxml

@@ -19,9 +19,12 @@ use LaTeXML::Package;
 # we can stop gracefully if it isn't (e.g. no texlive installed)
 
 if (FindFile('expl3', type => 'ltx', noltxml => 1)) {
-  InputDefinitions('expl3', type => 'ltx', noltxml => 1);
-  if (!($LaTeXML::DEBUG{compiling} || $LaTeXML::DEBUG{compiled})) {
-    RawTeX(<<'EoRawTeX');
+  InputDefinitions('expl3', type => 'ltx', noltxml => 1); }
+else {
+  Info('missing_file', 'expl3.ltx', undef,
+       'Recent versions of LaTeX expect expl3.ltx to be available, consider installing texlive.',
+      'Installing a simple subset of expl3 now...');
+  RawTeX(<<'EoRawTeX');
 \ExplSyntaxOn
 \cs_gset_eq:NN \@expl@cs@to@str@@N \cs_to_str:N
 \cs_gset_eq:NN \@expl@str@if@eq@@nnTF \str_if_eq:nnTF
@@ -101,8 +104,5 @@ if (FindFile('expl3', type => 'ltx', noltxml => 1)) {
 \ExplSyntaxOff
 EoRawTeX
   }
-}
-else {
-  Info('missing_file', 'expl3.ltx', undef, 'Recent versions of LaTeX expect expl3.ltx to be available, consider installing texlive.'); }
 
 1;