fix/ci: change clippy to be optional

Pull request: #2
Approved by: MichaelHirn

.travis.yml

@@ -5,8 +5,15 @@ rust:
 - stable
 matrix:
   allow_failures:
-  - rust: beta
-  - rust: stable
+    - rust: beta
+    - rust: stable
+    - rust: nightly
+      env: TRAVIS_CARGO_NIGHTLY_FEATURE=lint
+  exclude:
+    - rust: beta
+      env: TRAVIS_CARGO_NIGHTLY_FEATURE=lint
+    - rust: stable
+      env: TRAVIS_CARGO_NIGHTLY_FEATURE=lint
 before_script:
 - |
   pip install 'travis-cargo<0.2' --user &&
@@ -23,6 +30,7 @@ addons:
     - libcurl4-openssl-dev
     - libelf-dev
     - libdw-dev
+    - libblas-dev
 install:
   - sudo apt-get update
   - sudo apt-get install fglrx opencl-headers
@@ -34,5 +42,7 @@ notifications:
     on_success: never
 env:
   global:
-  - TRAVIS_CARGO_NIGHTLY_FEATURE=dev
-  - secure: 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
+    - secure: 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
+  matrix:
+    - TRAVIS_CARGO_NIGHTLY_FEATURE=dev
+    - TRAVIS_CARGO_NIGHTLY_FEATURE=lint

Cargo.toml

@@ -19,8 +19,10 @@ rblas = "0.0.10"
 enum_primitive = "0.1.0"
 byteorder = "0.4"
 num = "0.1"
-clippy = "0.0.23"
+
+clippy = { version = "0.0.23", optional = true }
 
 [features]
 default = []
-dev = [] # possibly for clippy
+dev = []
+lint = ["clippy"]

src/lib.rs

@@ -43,8 +43,8 @@
 //! [autumn]: http://autumnai.com
 //! [leaf]: https://github.com/autumnai/leaf
 //! [glium]: https://github.com/tomaka/glium
-#![feature(plugin)]
-#![plugin(clippy)]
+#![cfg_attr(lint, feature(plugin))]
+#![cfg_attr(lint, plugin(clippy))]
 #![allow(dead_code)]
 #![feature(associated_consts)]
 #![feature(associated_type_defaults)]