Make winit truly optional

.travis.yml

@@ -57,6 +57,7 @@ before_install:
 
 script:
   - cargo test
+  - cd wgpu-native && cargo check --features local,winit; fi
   - if [[ $TRAVIS_OS_NAME == "linux" ]]; then cargo check --release; fi
   - if [[ $TRAVIS_RUST_VERSION == "nightly" ]]; then cargo +nightly install cbindgen; fi
   - if [[ $TRAVIS_RUST_VERSION == "nightly" ]] && [[ $TRAVIS_OS_NAME == "windows" ]]; then
@@ -73,4 +74,4 @@ script:
     fi
   - if [[ $TRAVIS_RUST_VERSION == "nightly" ]] && [[ $TRAVIS_OS_NAME != "windows" ]]; then make VERBOSE=1; fi
   # TODO: Temporarily only test building the gl backend, properly test when it is usable from C
-  - if [[ $TRAVIS_OS_NAME == "linux" ]]; then cd wgpu-native && cargo build --features local,gfx-backend-gl; fi
+  - if [[ $TRAVIS_OS_NAME == "linux" ]]; then cd wgpu-native && cargo check --features local,gfx-backend-gl; fi

wgpu-native/Cargo.toml

@@ -20,7 +20,7 @@ default = []
 local = []
 remote = ["serde"]
 metal-auto-capture = ["gfx-backend-metal/auto-capture"]
-window-winit = ["winit", "gfx-backend-empty/winit"]
+window-winit = ["winit", "gfx-backend-empty/winit", "gfx-backend-vulkan/winit", "gfx-backend-dx11/winit", "gfx-backend-dx12/winit", "gfx-backend-metal/winit", "gfx-backend-gl/glutin"]
 
 [dependencies]
 arrayvec = "0.4"
@@ -29,12 +29,12 @@ copyless = "0.1"
 lazy_static = "1.1.0"
 log = "0.4"
 hal = { package = "gfx-hal", version = "0.3.0" }
-gfx-backend-empty = { version = "0.3.0", features = ["winit"] }
-gfx-backend-vulkan = { version = "0.3.0", features = ["winit", "x11"], optional = true }
-gfx-backend-dx11 = { version = "0.3.0", features = ["winit"], optional = true }
-gfx-backend-dx12 = { version = "0.3.0", features = ["winit"], optional = true }
-gfx-backend-metal = { version = "0.3.0", features = ["winit"], optional = true }
-gfx-backend-gl = { version = "0.3.0", features = ["winit", "glutin"], optional = true }
+gfx-backend-empty = { version = "0.3.0" }
+gfx-backend-vulkan = { version = "0.3.0", features = ["x11"], optional = true }
+gfx-backend-dx11 = { version = "0.3.0", optional = true }
+gfx-backend-dx12 = { version = "0.3.0", optional = true }
+gfx-backend-metal = { version = "0.3.0", optional = true }
+gfx-backend-gl = { version = "0.3.0", optional = true }
 parking_lot = { version = "0.9" }
 rendy-memory = { git = "https://github.com/amethyst/rendy", rev = "db6adbe7454f52ebf559a38dd88580aa3ebbcaaf" }
 rendy-descriptor = { git = "https://github.com/amethyst/rendy", rev = "db6adbe7454f52ebf559a38dd88580aa3ebbcaaf" }