12/19: gnu: Add rust-cexpr-0.2.

[guix-commits]

efraim pushed a commit to branch master
in repository guix.

commit d1e647e3638e1c2bcedfc918ccbd34a7ad78315a
Author: Valentin Ignatev <address@hidden>
AuthorDate: Sun Jan 26 16:13:24 2020 +0300

    gnu: Add rust-cexpr-0.2.
    
    * gnu/packages/crates-io.scm (rust-cexpr-0.2): New variable.
    
    Signed-off-by: Efraim Flashner <address@hidden>
---
 gnu/packages/crates-io.scm | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index db52c14..39332dd 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -1789,6 +1789,37 @@ archive to be linked into Rustcode.")
      "This package provides a C expression parser and evaluator.")
     (license (list license:asl2.0 license:expat))))
 
+(define-public rust-cexpr-0.2
+  (package
+    (inherit rust-cexpr-0.3)
+    (name "rust-cexpr")
+    (version "0.2.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "cexpr" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0v1xa3758czmj8h97gh548mr8g0v13ixxvrlm1s79nb7jmgc9aj2"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-nom" ,rust-nom-3))
+       #:cargo-development-inputs
+       (("rust-clang-sys" ,rust-clang-sys-0.11))
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'set-environmental-variable
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((clang (assoc-ref inputs "libclang")))
+               (setenv "LIBCLANG_PATH"
+                       (string-append clang "/lib")))
+             #t)))))
+    (inputs
+     `(("libclang" ,clang)))))
+
 (define-public rust-chrono-0.4
   (package
     (name "rust-chrono")