[bug#43414] [PATCH 1/3] gnu: Add rust-lab.

[Gabriel Arazas]

* gnu/packages/crates-io.scm (rust-lab-0.8): New variable.
* gnu/packages/crates-io.scm (rust-lab-0.7): New variable.
* gnu/packages/crates-io.scm (rust-lab-0.4): New variable.
---
 gnu/packages/crates-io.scm | 61 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)

diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 0f0f0c28c9..2f3cead9cf 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -12220,6 +12220,67 @@ currently supports parsing (fully conformant parser), 
formatting and comparing
 language tags.")
     (license license:expat)))
 
+(define-public rust-lab-0.8
+  (package
+    (name "rust-lab")
+    (version "0.8.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "lab" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1ysnbviwi35mq6xyz9c59mpgigyfp4s4y2mispxzrms4vk83bx15"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:cargo-development-inputs
+        (("rust-approx" ,rust-approx-0.3)
+         ("rust-criterion" ,rust-criterion-0.3)
+         ("rust-lazy-static" ,rust-lazy-static-1.4)
+         ("rust-pretty-assertions"
+          ,rust-pretty-assertions-0.6)
+         ("rust-rand" ,rust-rand-0.7))))
+    (home-page "https://github.com/TooManyBees/lab";)
+    (synopsis
+      "Converts RGB to CIE-LAB for Rust")
+    (description
+      "Tools for converting RGB colors to the CIE-LAB color space, and
+comparing differences in color.
+  ")
+    (license license:expat)))
+
+(define-public rust-lab-0.7
+  (package
+    (inherit rust-lab-0.8)
+    (name "rust-lab")
+    (version "0.7.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "lab" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0g692d489lq01pv3mzfhxd98j0r22lw28l6bk112m74djlfzxdmw"))))))
+
+(define-public rust-lab-0.4
+  (package
+    (inherit rust-lab-0.8)
+    (name "rust-lab")
+    (version "0.4.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "lab" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0h4ig5bvzmwlzd74zj7b4sh7kzi3c6mjjnw7yjz8ijxvr4mrcr1s"))))))
+
 (define-public rust-lalrpop-0.17
   (package
     (name "rust-lalrpop")
-- 
2.28.0