ci: Cleanup .travis.yml

- Move image fetching out of main script
- Move installation actions to "install"
- Set warning configs via environment variables
- Reorder sections to increase readablity

Signed-off-by: Joe Richey <[email protected]>

Author: josephlr

.travis.yml

@@ -3,26 +3,28 @@ language: rust
 
 rust:
   - nightly-2019-11-05
+env:
+  - RUSTFLAGS="-D warnings"
 
-before_script:
+addons:
+  apt:
+    update: true
+
+install:
   - rustup component add clippy
   - rustup component add rustfmt
   - rustup component add rust-src
   - cargo install cargo-xbuild
   - sudo apt-get install -y mtools
-
-addons:
-  apt:
-    update: true
+  - wget https://download.clearlinux.org/releases/28660/clear/clear-28660-kvm.img.xz
+  - unxz clear-28660-kvm.img.xz
+  - ./make-test-disks.sh
 
 script:
   - cargo xbuild --release --target target.json
-  - cargo xclippy -- -D warnings
-  - cargo clippy --all-targets --all-features -- -D warnings
+  - cargo xclippy
+  - cargo clippy --all-targets --all-features
   - cargo fmt --all -- --check
-  - wget https://download.clearlinux.org/releases/28660/clear/clear-28660-kvm.img.xz
-  - unxz clear-28660-kvm.img.xz
-  - ./make-test-disks.sh
   - cargo test
 
 deploy: