22/23: gnu: Add rust-futures-core-preview.

[guix-commits]

efraim pushed a commit to branch master
in repository guix.

commit 03e22b2eee16a5958a112db48b2e94584ed37bf2
Author: Efraim Flashner <address@hidden>
Date:   Tue Sep 17 18:57:16 2019 +0300

    gnu: Add rust-futures-core-preview.
    
    * gnu/packages/crates-io.scm (rust-futures-core-preview): New variable.
---
 gnu/packages/crates-io.scm | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 948bb87..1b7989e 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -1057,6 +1057,28 @@ featuring zero allocations, composability, and 
iterator-like interfaces.")
     (license (list license:asl2.0
                    license:expat))))
 
+(define-public rust-futures-core-preview
+  (package
+    (name "rust-futures-core-preview")
+    (version "0.3.0-alpha.17")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "futures-core-preview" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1xaq8m609k6cz8xydwhwp8xxyxigabcw1w9ngycfy0bnkg7iq52b"))))
+    (build-system cargo-build-system)
+    (arguments
+     '(#:tests? #f)) ; The only tests are doc tests, which fail.
+    (home-page "https://rust-lang-nursery.github.io/futures-rs/";)
+    (synopsis "Core traits and types in for the @code{futures} library.")
+    (description "This crate provides the core traits and types in for the
+@code{futures} library.")
+    (license (list license:asl2.0
+                   license:expat))))
+
 (define-public rust-futures-cpupool
   (package
     (name "rust-futures-cpupool")