.travis.yml

os: linux
dist: xenial
language: php

php:
  - "7.4"
  - "7.3"
  - "7.2"

cache:
  directories:
  - vendor
  - $HOME/.composer/cache

env:
  jobs:
  - DEPENDENCIES=latest
  - DEPENDENCIES=oldest

install:
- >
  if [ "$DEPENDENCIES" = "latest" ]; then
    echo "Installing the latest dependencies";
    composer update --with-dependencies --prefer-stable --prefer-dist
  else
    echo "Installing the lowest dependencies";
    composer update --with-dependencies --prefer-stable --prefer-dist --prefer-lowest
  fi;
  composer show;

script:
- >
  echo;
  echo "Validating the composer.json";
  composer ci:composer-validate;

- >
  echo;
  echo "Linting all PHP files";
  composer ci:lint;

- >
  echo;
  echo "Running the Psalm static analyzer";
  composer ci:psalm;

- >
  echo;
  echo "Running the PHPUnit tests";
  composer ci:tests;