Deny warnings in CI tests (#82)

.travis.yml

@@ -3,19 +3,19 @@ sudo: false
 
 matrix:
   include:
-    - rust: 1.32.0
-      env: DESCRIPTION="Linux, 1.32.0"
+    - name: "Linux, 1.32.0"
+      rust: 1.32.0
       os: linux
 
-    - rust: 1.32.0
-      env: DESCRIPTION="OSX, 1.32.0"
+    - name: "OSX, 1.32.0"
+      rust: 1.32.0
       os: osx
 
-    - rust: stable
-      env: DESCRIPTION="Linux, stable"
+    - name: "Linux, stable"
+      rust: stable
 
-    - rust: stable
-      env: DESCRIPTION="OSX+iOS, stable"
+    - name: "OSX+iOS, stable"
+      rust: stable
       os: osx
       install:
         - rustup target add aarch64-apple-ios
@@ -24,54 +24,11 @@ matrix:
         - cargo test --examples
         - cargo build --target aarch64-apple-ios
 
-    - rust: beta
-      env: DESCRIPTION="Linux, beta"
+    - name: "Linux, beta"
+      rust: beta
 
-    - rust: stable
-      env: DESCRIPTION="Rustfmt"
-      install:
-        - rustup component add rustfmt
-      script:
-        - cargo fmt --all -- */*.rs --check
-
-    - rust: nightly
-      os: linux
-      env: DESCRIPTION="Linux, nightly, docs"
-      install:
-        - cargo --list | egrep "^\s*deadlinks$" -q || cargo install cargo-deadlinks
-        - cargo deadlinks -V
-      script:
-        - cargo test
-        - cargo test --benches
-        - cargo test --examples
-        # remove cached documentation, otherwise files from previous PRs can get included
-        - rm -rf target/doc
-        - cargo doc --no-deps --all --features=std,log
-        - cargo deadlinks --dir target/doc
-        # also test minimum dependency versions are usable
-        - cargo generate-lockfile -Z minimal-versions
-        - cargo test
-
-    - rust: nightly
-      os: osx
-      env: DESCRIPTION="OSX, nightly, docs"
-      install:
-        - cargo --list | egrep "^\s*deadlinks$" -q || cargo install cargo-deadlinks
-        - cargo deadlinks -V
-      script:
-        - cargo test
-        - cargo test --benches
-        - cargo test --examples
-        # remove cached documentation, otherwise files from previous PRs can get included
-        - rm -rf target/doc
-        - cargo doc --no-deps --all --features=std,log
-        - cargo deadlinks --dir target/doc
-        # also test minimum dependency versions are usable
-        - cargo generate-lockfile -Z minimal-versions
-        - cargo test
-
-    - rust: nightly
-      env: DESCRIPTION="WASM via emscripten, stdweb, wasm-bindgen and WASI"
+    - name: "WASM via emscripten, stdweb, wasm-bindgen and WASI"
+      rust: nightly
       install:
         - rustup target add wasm32-unknown-unknown
         - rustup target add wasm32-unknown-emscripten
@@ -100,8 +57,44 @@ matrix:
         - node tests/wasm_bindgen/js/index.js
         - wasm-pack test --node tests/wasm_bindgen
 
-    - rust: nightly
-      env: DESCRIPTION="cross-platform build only"
+    - name: "Linux, nightly, docs"
+      rust: nightly
+      os: linux
+      install:
+        - cargo --list | egrep "^\s*deadlinks$" -q || cargo install cargo-deadlinks
+        - cargo deadlinks -V
+      script:
+        - cargo test
+        - cargo test --benches
+        - cargo test --examples
+        # remove cached documentation, otherwise files from previous PRs can get included
+        - rm -rf target/doc
+        - cargo doc --no-deps --all --features=std,log
+        - cargo deadlinks --dir target/doc
+        # also test minimum dependency versions are usable
+        - cargo generate-lockfile -Z minimal-versions
+        - cargo test
+
+    - name: "OSX, nightly, docs"
+      rust: nightly
+      os: osx
+      install:
+        - cargo --list | egrep "^\s*deadlinks$" -q || cargo install cargo-deadlinks
+        - cargo deadlinks -V
+      script:
+        - cargo test
+        - cargo test --benches
+        - cargo test --examples
+        # remove cached documentation, otherwise files from previous PRs can get included
+        - rm -rf target/doc
+        - cargo doc --no-deps --all --features=std,log
+        - cargo deadlinks --dir target/doc
+        # also test minimum dependency versions are usable
+        - cargo generate-lockfile -Z minimal-versions
+        - cargo test
+
+    - name: "cross-platform build only"
+      rust: nightly
       # libc on Redox is broken: see https://github.com/rust-lang/libc/pull/1450
       install:
         - rustup target add x86_64-sun-solaris
@@ -140,36 +133,48 @@ matrix:
         - cargo xbuild --target=x86_64-uwp-windows-gnu
 
     # Trust cross-built/emulated targets. We must repeat all non-default values.
-    - rust: stable
+    - name: "Linux (MIPS, big-endian)"
+      env: TARGET=mips-unknown-linux-gnu
+      rust: stable
       sudo: required
       dist: trusty
       services: docker
-      env: DESCRIPTION="Linux (MIPS, big-endian)" TARGET=mips-unknown-linux-gnu
       install:
         - sh utils/ci/install.sh
         - source ~/.cargo/env || true
       script:
         - bash utils/ci/script.sh
 
-    - rust: stable
+    - name: "Android (ARMv7)"
+      env: TARGET=armv7-linux-androideabi
+      rust: stable
       sudo: required
       dist: trusty
       services: docker
-      env: DESCRIPTION="Android (ARMv7)" TARGET=armv7-linux-androideabi
       install:
         - sh utils/ci/install.sh
         - source ~/.cargo/env || true
       script:
         - bash utils/ci/script.sh
 
+    - name: "rustfmt"
+      rust: stable
+      install:
+        - rustup component add rustfmt
+      script:
+        - cargo fmt --all -- */*.rs --check
+
   allow_failures:
     # Formatting errors should appear in Travis, but not break the build.
-    - env: DESCRIPTION="Rustfmt"
+    - name: "rustfmt"
 
 before_install:
   - set -e
   - rustup self update
 
+before_script:
+  - export RUSTFLAGS="-D warnings"
+
 script:
   - cargo test
   - cargo test --examples
@@ -188,3 +193,7 @@ before_cache:
 notifications:
   email:
     on_success: never
+
+branches:
+  only:
+    - master

appveyor.yml

@@ -43,5 +43,10 @@ install:
 build: false
 
 test_script:
+  - set RUSTFLAGS=-D warnings
   - cargo test
   - cargo test --examples
+
+branches:
+  only:
+    - master

src/error.rs

@@ -21,8 +21,10 @@ pub struct Error(NonZeroU32);
 
 impl Error {
     #[deprecated(since = "0.1.7")]
+    /// Unknown error.
     pub const UNKNOWN: Error = UNSUPPORTED;
     #[deprecated(since = "0.1.7")]
+    /// System entropy source is unavailable.
     pub const UNAVAILABLE: Error = UNSUPPORTED;
 
     /// Codes below this point represent OS Errors (i.e. positive i32 values).
@@ -40,7 +42,7 @@ impl Error {
     /// that it works in `no_std` contexts. If this method returns `None`, the
     /// error value can still be formatted via the `Diplay` implementation.
     #[inline]
-    pub fn raw_os_error(&self) -> Option<i32> {
+    pub fn raw_os_error(self) -> Option<i32> {
         if self.0.get() < Self::INTERNAL_START {
             Some(self.0.get() as i32)
         } else {
@@ -53,7 +55,7 @@ impl Error {
     /// This code can either come from the underlying OS, or be a custom error.
     /// Use [`Error::raw_os_error()`] to disambiguate.
     #[inline]
-    pub fn code(&self) -> NonZeroU32 {
+    pub fn code(self) -> NonZeroU32 {
         self.0
     }
 }
@@ -66,7 +68,8 @@ fn os_err_desc(errno: i32, buf: &mut [u8]) -> Option<&str> {
     }
 
     // Take up to trailing null byte
-    let idx = buf.iter().position(|&b| b == 0).unwrap_or(buf.len());
+    let n = buf.len();
+    let idx = buf.iter().position(|&b| b == 0).unwrap_or(n);
     core::str::from_utf8(&buf[..idx]).ok()
 }
 

src/lib.rs

@@ -126,7 +126,7 @@
 )]
 #![no_std]
 #![cfg_attr(feature = "stdweb", recursion_limit = "128")]
-#![warn(rust_2018_idioms, unused_lifetimes)]
+#![warn(rust_2018_idioms, unused_lifetimes, missing_docs)]
 
 #[macro_use]
 extern crate cfg_if;

src/use_file.rs

@@ -24,7 +24,7 @@ const FILE_PATH: &str = "/dev/random\0";
 
 pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
     static FD: LazyFd = LazyFd::new();
-    let fd = FD.init(init_file).ok_or(last_os_error())?;
+    let fd = FD.init(init_file).ok_or_else(last_os_error)?;
     let read = |buf: &mut [u8]| unsafe { libc::read(fd, buf.as_mut_ptr() as *mut _, buf.len()) };
 
     if cfg!(target_os = "emscripten") {

src/wasm32_stdweb.rs

@@ -11,9 +11,9 @@ extern crate std;
 
 use core::mem;
 
+use stdweb::js;
 use stdweb::unstable::TryInto;
 use stdweb::web::error::Error as WebError;
-use stdweb::{_js_impl, js};
 
 use crate::error::{STDWEB_NO_RNG, STDWEB_RNG_FAILED};
 use crate::Error;
@@ -69,8 +69,8 @@ fn getrandom_init() -> Result<RngSource, Error> {
             unreachable!()
         }
     } else {
-        let err: WebError = js! { return @{ result }.error }.try_into().unwrap();
-        error!("getrandom unavailable: {}", err);
+        let _err: WebError = js! { return @{ result }.error }.try_into().unwrap();
+        error!("getrandom unavailable: {}", _err);
         Err(STDWEB_NO_RNG)
     }
 }
@@ -105,8 +105,8 @@ fn getrandom_fill(source: RngSource, dest: &mut [u8]) -> Result<(), Error> {
         };
 
         if js! { return @{ result.as_ref() }.success } != true {
-            let err: WebError = js! { return @{ result }.error }.try_into().unwrap();
-            error!("getrandom failed: {}", err);
+            let _err: WebError = js! { return @{ result }.error }.try_into().unwrap();
+            error!("getrandom failed: {}", _err);
             return Err(STDWEB_RNG_FAILED);
         }
     }