gnu: Add rust-petgraph-0.4.

* gnu/packages/crates-io.scm (rust-petgraph-0.4): New variable.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu/packages/crates-io.scm

@@ -4496,6 +4496,40 @@ algorithm.")
     (license (list license:asl2.0
                    license:expat))))
 
+(define-public rust-petgraph-0.4
+  (package
+    (name "rust-petgraph")
+    (version "0.4.13")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "petgraph" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0kyfmca854s54jk26g2x1kjb04c3k7cjilaxyr0if8lhxv8mjdlw"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-fixedbitset" ,rust-fixedbitset-0.1)
+        ("rust-ordermap" ,rust-ordermap-0.3)
+        ("rust-quickcheck" ,rust-quickcheck-0.8)
+        ("rust-serde" ,rust-serde-1.0)
+        ("rust-serde-derive" ,rust-serde-derive-1.0))
+       #:cargo-development-inputs
+       (("rust-defmac" ,rust-defmac-0.2)
+        ("rust-itertools" ,rust-itertools-0.8)
+        ("rust-odds" ,rust-odds-0.3)
+        ("rust-rand" ,rust-rand-0.4))))
+    (home-page "https://github.com/petgraph/petgraph")
+    (synopsis "Graph data structure library")
+    (description
+     "Graph data structure library.  Provides graph types and graph
+algorithms.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-pico-sys-0.0
   (package
     (name "rust-pico-sys")