Merge pull request #66 from per1234/arduino-cli_ci

Use arduino-cli for Travis CI build

Author: per1234

Diff for: .travis.yml

@@ -1,7 +1,7 @@
 language: generic
 env:
   global:
-    - IDE_VERSION=1.8.9
+    - CLI_VERSION=latest
 matrix:
   include:
     - env:
@@ -42,23 +42,26 @@ matrix:
         - codespell --skip="${TRAVIS_BUILD_DIR}/.git" --ignore-words="${TRAVIS_BUILD_DIR}/extras/codespell-ignore-words-list.txt" "${TRAVIS_BUILD_DIR}"
 # default phases
 before_install:
-  - wget http://downloads.arduino.cc/arduino-$IDE_VERSION-linux64.tar.xz
-  - tar xf arduino-$IDE_VERSION-linux64.tar.xz
-  - mv arduino-$IDE_VERSION $HOME/arduino-ide
-  - export PATH=$PATH:$HOME/arduino-ide
+  - wget http://downloads.arduino.cc/arduino-cli/arduino-cli-$CLI_VERSION-linux64.tar.bz2
+  - tar xf arduino-cli-$CLI_VERSION-linux64.tar.bz2
+  - mkdir -p "$HOME/bin"
+  - mv arduino-cli-*-linux64 $HOME/bin/arduino-cli
+  - export PATH="$PATH:$HOME/bin"
+  - arduino-cli core update-index
   - if [[ "$BOARD" =~ "arduino:samd:" ]]; then
-      arduino --install-boards arduino:samd;
+      arduino-cli core install arduino:samd;
     fi
-  - arduino --install-library ArduinoCloudThing
-  - arduino --install-library ArduinoECCX08
-  - arduino --install-library ArduinoIoTCloudBearSSL
-  - arduino --install-library ArduinoMqttClient
-  - arduino --install-library MKRGSM
-  - arduino --install-library RTCZero
-  - arduino --install-library WiFi101
-  - arduino --install-library WiFiNINA
-  - buildExampleSketch() { arduino --verify --board $BOARD $PWD/examples/$1/$1.ino; }
-  - buildExampleUtilitySketch() { arduino --verify --board $BOARD $PWD/examples/utility/$1/$1.ino; }
+  - arduino-cli lib install ArduinoCloudThing
+  - arduino-cli lib install ArduinoECCX08
+  - arduino-cli lib install ArduinoIoTCloudBearSSL
+  - arduino-cli lib install ArduinoMqttClient
+  - arduino-cli lib install MKRGSM
+  - arduino-cli lib install RTCZero
+  - arduino-cli lib install WiFi101
+  - arduino-cli lib install WiFiNINA
+  - arduino-cli lib install Ethernet
+  - buildExampleSketch() { arduino-cli compile --warnings all --fqbn $BOARD $PWD/examples/$1; }
+  - buildExampleUtilitySketch() { arduino-cli compile --warnings all --fqbn $BOARD $PWD/examples/utility/$1; }
 install:
   - mkdir -p $HOME/Arduino/libraries
   - ln -s $PWD $HOME/Arduino/libraries/.