gnu: Add rust-platforms-2.

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

Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>

gnu/packages/crates-io.scm

@@ -19,7 +19,7 @@
 ;;; Copyright © 2021 Antero Mejr <antero@kodmin.com>
 ;;; Copyright © 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2021 Vinicius Monego <monego@posteo.net>
-;;; Copyright © 2021 Petr Hodina <phodina@protonmail.com>
+;;; Copyright © 2021, 2022 Petr Hodina <phodina@protonmail.com>
 ;;; Copyright © 2021 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2021 Jacob Hrbek <kreyren@rixotstudio.cz>
 ;;; Copyright © 2021 Nicolas Graves <ngraves@ngraves.fr>
@@ -42056,6 +42056,29 @@ network packet formats.")
     (license (list license:asl2.0
                    license:expat))))
 
+(define-public rust-platforms-2
+  (package
+    (name "rust-platforms")
+    (version "2.0.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "platforms" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "152cnf65zzr6vj5xyap1aqp6ajmfqdhlij2x1lx02hhjazryxl78"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-serde" ,rust-serde-1))))
+    (home-page "https://rustsec.org")
+    (synopsis "Query information about valid Rust platforms")
+    (description
+     "This package provides information about valid Rust platforms (target
+triple, target_arch, target_os) sourced from Rust Forge.")
+    (license (list license:asl2.0 license:expat))))
+
 (define-public rust-plist-1
   (package
     (name "rust-plist")