Add CI

.travis.yml

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+language: rust
+
+matrix:
+  include:
+    - env: TARGET=x86_64-unknown-linux-gnu
+
+    - env: TARGET=x86_64-unknown-linux-gnu
+      rust: nightly
+
+    - env: TARGET=x86_64-unknown-linux-musl
+      rust: nightly
+
+    # Raspberry Pi 1
+    - env: TARGET=arm-unknown-linux-gnueabi DISABLE_EXAMPLES=1 DISABLE_TESTS=1
+      rust: nightly
+
+    # Raspberry Pi 2, 3, etc
+    - env: TARGET=armv7-unknown-linux-gnueabihf DISABLE_EXAMPLES=1 DISABLE_TESTS=1
+      rust: nightly
+
+    # Bare metal
+    - env: TARGET=thumbv6m-none-eabi
+      rust: beta
+    - env: TARGET=thumbv7em-none-eabi
+      rust: beta
+    - env: TARGET=thumbv7em-none-eabihf
+      rust: beta
+    - env: TARGET=thumbv7m-none-eabi
+      rust: beta
+
+before_install:
+  - set -e
+  - rustup self update
+
+install:
+  - bash ci/install.sh
+
+script:
+  - bash ci/script.sh
+
+after_script: set +e
+
+cache: cargo
+before_cache:
+  # Travis can't cache files that are not readable by "others"
+  - chmod -R a+r $HOME/.cargo
+
+branches:
+  only:
+    - master
+    - staging
+    - trying
+
+notifications:
+  email:
+    on_success: never

ci/install.sh

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+set -euxo pipefail
+
+main() {
+    rustup component add rust-src
+    SYSROOT=$(rustc --print sysroot)
+    if [[ ! "$SYSROOT" =~ "$TARGET" ]]; then
+        rustup target add $TARGET
+    else
+        echo "Target $TARGET is already installed"
+    fi
+}
+
+main

ci/script.sh

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+set -exo pipefail
+
+main() {
+    if [[ ! $TARGET =~ .*linux.* ]]; then
+        sed -i "s/linux-embedded-hal/#linux-embedded-hal/g" Cargo.toml
+        sed -i "s/embedded-hal-mock/#embedded-hal-mock/g" Cargo.toml
+    fi
+
+    if [ ! -z $FEATURES ]; then
+       export FEATURES="--features $FEATURES"
+    fi
+
+    cargo check --target $TARGET $FEATURES
+    cargo build --target $TARGET --release $FEATURES
+    if [ -z $DISABLE_EXAMPLES ] && [[ $TARGET =~ .*linux.* ]]; then
+        cargo build --target $TARGET $FEATURES --examples
+    fi
+
+    if [ -z $DISABLE_TESTS ] && [ $TRAVIS_RUST_VERSION = nightly ] && [[ $TARGET =~ .*linux.* ]]; then
+        cargo test --target $TARGET $FEATURES
+    fi
+}
+
+main