use cross

Author: Jorge Aparicio

.travis.yml

@@ -1,4 +1,3 @@
-cache: cargo
 dist: trusty
 language: rust
 rust: nightly
@@ -16,20 +15,24 @@ env: TARGET=x86_64-unknown-linux-gnu
 install:
   # NOTE(TRAVIS_BRANCH) Travis is configured to only build *pushes* (not PRs).
   - if [ $TRAVIS_BRANCH != master ] || [ $TRAVIS_EVENT_TYPE = cron ]; then
-      curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain $TRAVIS_RUST_VERSION;
+      curl https://sh.rustup.rs -sSf |
+        sh -s -- -y --default-toolchain $TRAVIS_RUST_VERSION;
+
       source ~/.cargo/env;
-      rustup component add rust-src;
+
+      cargo install --git https://github.com/japaric/cross -f;
     fi
 
 script:
   # NOTE(TRAVIS_BRANCH) See the NOTE in the `install` section
-  # chmod: Travis can't cache files that are not readable by "others"
   - if [ $TRAVIS_BRANCH != master ] || [ $TRAVIS_EVENT_TYPE = cron ]; then
-      cargo generate-lockfile;
-      sh ci/run-docker.sh $TARGET;
-      chmod -R a+r $HOME/.cargo;
+      sh ci/script.sh
     fi
 
+cache: cargo
+before_cache:
+  - chmod -R a+r $HOME/.cargo;
+
 branches:
   only:
     - auto

ci/docker/thumbv6m-none-eabi/Dockerfile

@@ -0,0 +1,14 @@
+set -ex
+
+main() {
+    case $TARGET in
+        thumbv*-none-eabi*)
+            cross build --target $TARGET
+            ;;
+        *)
+            cross test --target $TARGET
+            ;;
+    esac
+}
+
+main