.travis.yml

os: linux
dist: bionic
language: python
python: "3.8"

jobs:
  include:
    - stage:  # IDF v3.3
      install:
        # Install ESP32 toochain following steps as described
        # in http://esp-idf.readthedocs.io/en/latest/linux-setup.html
        #
        # Download binary toolchain for the ESP32
        - pushd ~
        - wget https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz
        - tar -xzf xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz
        # Make xtensa-esp32-elf available for all terminal sessions
        - export PATH=$PATH:$(pwd)/xtensa-esp32-elf/bin
        # Get ESP-IDF from github
        - git clone --recursive --branch v3.3 --single-branch --shallow-submodules https://github.com/espressif/esp-idf.git esp-idf
        # Set the path to ESP-IDF directory
        - export IDF_PATH=$(pwd)/esp-idf
        # Install python dependencies
        - pip install --requirement $IDF_PATH/requirements.txt
        - popd
      script:
        - $IDF_PATH/tools/idf.py build

    - stage:  # IDF v4.1-beta1
      install:
        - pushd ~
        - git clone --recursive --branch v4.1-beta1 --single-branch --shallow-submodules https://github.com/espressif/esp-idf.git esp-idf
        - esp-idf/install.sh
        - popd
      script:
        - source ~/esp-idf/export.sh && idf.py build