Check for Clippy warnings during CI

.gitlab-ci.yml

@@ -12,6 +12,8 @@ variables:
 
 before_script:
   - apt-get update -yq
+  - rustup component add clippy
+  - rustup component add rustfmt
   # Setup SSH deploy keys
   - 'which ssh-agent || ( apt-get install -qq openssh-client )'
   - eval $(ssh-agent -s)
@@ -24,7 +26,8 @@ test:
   script:
     - rustc --version
     - cargo --version
-    - cargo test --verbose
+    - cargo test --features "strict" --verbose
+    - cargo clippy --all-targets --all-features -- -D warnings -A clippy::redundant_field_names -A clippy::useless_format -A clippy::let_and_return -A clippy::type_complexity -A clippy::option_map_unit_fn -A clippy::too_many_arguments
 
 pages:
   stage: doc

Cargo.toml

@@ -5,6 +5,7 @@ authors = ["Robert Czechowski <czechowski@bwinf.de>"]
 
 [features]
 watch = ["handlebars-iron/watch"]
+strict = [] # Treat warnings as a build error
 
 [dependencies]
 rusqlite = "0.13.0"

src/main.rs

+#![cfg_attr(feature = "strict", deny(warnings))]
+
 #[macro_use]
 extern crate iron;
 #[macro_use]