build/CI ~ improve Travis CI configuration (adds i686 build testing)

.travis.yml

@@ -1,7 +1,22 @@
+# spell-checker:ignore fakeroot msvc multilib musl rustc rustup
 language: rust
 cache: cargo
+
+env:
+  global:
+    # used by the deployment script
+    - PROJECT_NAME=pastel
+
 matrix:
+  allow_failures:
+    # os: windows is still BETA as of 2019-09
+    - os: windows
+    - rust: nightly
   include:
+    # Minimum Rust supported channel.
+    - os: linux
+      rust: 1.34.0
+      env: TARGET=x86_64-unknown-linux-gnu
     # Stable channel.
     - os: linux
       rust: stable
@@ -15,35 +30,39 @@ matrix:
     - os: windows
       rust: stable
       env: TARGET=x86_64-pc-windows-msvc
-
-    # Minimum Rust supported channel.
     - os: linux
-      rust: 1.34.0
-      env: TARGET=x86_64-unknown-linux-gnu
-
+      rust: stable
+      env: TARGET=i686-unknown-linux-gnu
+    - os: linux
+      rust: stable
+      env: TARGET=i686-unknown-linux-musl
+    - os: osx
+      rust: stable
+      env: TARGET=i686-apple-darwin
+    - os: windows
+      rust: stable
+      env: TARGET=i686-pc-windows-msvc
 
 addons:
   apt:
     packages:
       # needed to build deb packages
       - fakeroot
-
-env:
-  global:
-    # Default target on travis-ci.
-    # Used as conditional check in the install stage
-    - HOST=x86_64-unknown-linux-gnu
-    # Used on the deployment script
-    - PROJECT_NAME=pastel
+      # needed for i686/x86/32-bit builds
+      - gcc-multilib
 
 install:
   # prevent target re-add error from rustup
-  - if [[ $TRAVIS_OS_NAME = linux && $HOST != $TARGET ]]; then rustup target add $TARGET; fi
+  - export HOST=$( rustup show | grep -Pio "^default\\s+host\\s*:\\s*(.*)$" | grep -Pio "([\S]+)(?=\s*$)" )
+  - if [[ $HOST != $TARGET ]]; then rustup target add $TARGET; fi
+  # show rust versions
+  - rustup -vV && rustup show
+  - rustc -vV
+  - cargo -vV
 
 script:
-  # Incorporate TARGET env var to the build and test process
-  - cargo build --target $TARGET --verbose
-  - cargo test --target $TARGET --verbose
+  - echo "[ `cargo build --target $TARGET --verbose` ]" && cargo build --target $TARGET --verbose
+  - echo "[ `cargo test --target $TARGET --verbose` ]" && cargo test --target $TARGET --verbose
 
 before_deploy:
   - bash ci/before_deploy.bash
@@ -75,5 +94,5 @@ deploy:
     condition: $TRAVIS_RUST_VERSION = stable && $TARGET != "x86_64-pc-windows-msvc"
 
 notifications:
-  email:
-    on_success: never
+  on_success: change
+  on_failure: always