gnu: Add texlive-emp.

* gnu/packages/tex.scm (texlive-emp): New variable.

gnu/packages/tex.scm

@@ -4912,6 +4912,31 @@ envisage including a DVI page into an EPS files generated by MetaPost.  Such
 files allow pages to include other pages.")
     (license license:public-domain)))
 
+(define-public texlive-emp
+  (package
+    (name "texlive-emp")
+    (version (number->string %texlive-revision))
+    (source (texlive-origin
+             name version
+             (list "doc/latex/emp/" "source/latex/emp/"
+                   "tex/latex/emp/")
+             (base32
+              "183qwxxjws4l0jrn92dj4qd8avnv9gq2rk1zqak0h48wxlp0fpyq")))
+    (outputs '("out" "doc"))
+    (build-system texlive-build-system)
+    (home-page "https://ctan.org/pkg/emp")
+    (synopsis "Encapsulate MetaPost figures in a document")
+    (description
+     "Emp is a package for encapsulating MetaPost figures in LaTeX: the
+package provides environments where you can place MetaPost commands, and means
+of using that code as fragments for building up figures to include in your
+document.  So, with Emp, the procedure is to run your document with LaTeX, run
+MetaPost, and then complete running your document in the normal way.  Emp is
+therefore useful for keeping illustrations in synchrony with the text.  It
+also frees you from inventing descriptive names for PostScript files that fit
+into the confines of file system conventions.")
+    (license license:gpl3+)))
+
 (define-public texlive-enctex
   (package
     (name "texlive-enctex")