add pushout and pullback symbols

src/math/mathfig.pysty

@@ -11,6 +11,7 @@ __HEADER__(Math figures with TikZ / pgfplots / xy)
 \usetikzlibrary{calc, intersections, through, quotes, angles, babel, positioning, snakes}
 
 \RequirePackage{tikz-cd} %Commutative diagrams
+\RequirePackage{xparse}
 
 
 %%for small diagrams, similar to tikz-cd
@@ -20,3 +21,24 @@ __HEADER__(Math figures with TikZ / pgfplots / xy)
 % \xyoption{all}
 % here, but this messes with the catcode of the @ sign (which no package should do!)
 % so that further parts in this package would get broken
+
+
+\newcommand\pushoutsymbol{\tikz[baseline=0.5,scale=0.2]{
+        \draw[-] (0,0) --(0,1) -- (1,1);
+    \draw (1,0) circle (1.5pt);}
+}
+
+\newcommand\pullbacksymbol{\tikz[baseline=0.5,scale=0.2]{
+        \draw[-] (0,0) --(1,0) -- (1,1);
+    \draw (0,1) circle (1.5pt);}
+}
+
+% This is used in a tikzcd
+\NewDocumentCommand\pushout{ O{dr} }{
+    \arrow[phantom, pos=0.45]{#1}{\pushoutsymbol}
+}
+
+% This is used in a tikzcd
+\NewDocumentCommand\pullback{ O{dr} }{
+    \arrow[phantom, pos=0.45]{#1}{\pullbacksymbol}
+}

tests/math/mathfig/test.tex

@@ -10,7 +10,14 @@
     \end{tikzcd}
 \]
 test2:
-    \begin{tikzpicture}
-        \draw (0,0) rectangle (10,10);
-    \end{tikzpicture}
+
+    \begin{tikzcd}
+        A \pushout & B \\
+        C & D
+    \end{tikzcd}
+
+    \begin{tikzcd}
+        A \pullback & B \\
+        C & D
+    \end{tikzcd}
 \end{document}