[bug#56729] [RFC PATCH v3 16/32] gnu: Add sagemath-data-graphs.

[vicvbcun]

* gnu/packages/sagemath.scm (sagemath-data-graphs): New variable.
---

Notes:
    smallgraphs.txt, isgci_sage.xml: The website (graphclasses.org) has an 
CC-BY-SA 3.0 icon/button in footer

 gnu/packages/sagemath.scm | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/gnu/packages/sagemath.scm b/gnu/packages/sagemath.scm
index f10dc89cd1..a60dfb8d9f 100644
--- a/gnu/packages/sagemath.scm
+++ b/gnu/packages/sagemath.scm
@@ -450,3 +450,26 @@ (define-public sagemath-data-elliptic-curves
       (synopsis "Databases of elliptic curves")
       (description synopsis)
       (license #f))))
+
+(define-public sagemath-data-graphs
+  (package
+    (name "sagemath-data-graphs")
+    (version "20210214")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "mirror://sagemath/spkg/upstream/graphs/graphs-" version
+                    ".tar.bz2"))
+              (sha256
+               (base32
+                "0h9p5wrxips51x6vpfiiaqzp9j004nwppzc9qc2iaqakk06pq8q7"))))
+    (build-system copy-build-system)
+    (arguments
+     '(#:install-plan '(("." "share/graphs"))))
+    (home-page "https://www.sagemath.org";)
+    (synopsis "Database of graphs")
+    (description
+     "This package contains databases of graphs.  It also includes the
+@acronym{ISGCI, Information System on Graph Classes and their Inclusions}
+database.")
+    (license #f)))
-- 
2.40.1