Replace all uses of \providecommand with \newcommand.

[mjotex.git] / mjo-listing.tex

diff --git a/mjo-listing.tex b/mjo-listing.tex
index 5207aa2b83e1721af9ca8378ab72ca8c6a5ae877..f898aba13ea886be03258fea0bfc61dd1ee72dd9 100644 (file)
--- a/mjo-listing.tex
+++ b/mjo-listing.tex
@@ -10,6 +10,10 @@
 %   x
 %   \end{tcblisting}
 %
+\ifx\havemjolisting\undefined
+\def\havemjolisting{1}
+
+
 \usepackage{listings}
 \usepackage{tcolorbox}
 
@@ -38,3 +42,20 @@
   keywordstyle=\color{brilliantlavender},
   stringstyle=\color{brilliantgreen}
 }
+
+
+% Input a SageMath example code listing from a file. You generally
+% want these to be in separate files so that the build system can test
+% them automatically.
+%
+% The sole argument is the "name" of the listing, which ultimately
+% just identifies a file named "sage_listings/<name>.listing".
+\newcommand*{\sagelisting}[1]{\tcbinputlisting{listing only,%
+               colback=codebg,%
+               coltext=codefg,%
+               left=2em,%
+               listing options={language=sage,style=sage},%
+               listing file=sage_listings/#1.listing}}
+
+
+\fi