.travis.yml

os: linux
dist: xenial

language: go

jobs:
  include:
    - go: "master"
      env: "GOIMPORTS_CHECK=0"
    - go: "1.15.5"
      env: "GOIMPORTS_CHECK=1"

cache:
  directories:
    - $HOME/.cache/go-build
    - $HOME/gopath/pkg/mod

env:
  global:
    - GO111MODULE=on
    - GORACE="halt_on_error=1"

before_script:
  - set -eo pipefail
  - |
    if test $GOIMPORTS_CHECK -eq 1
    then
      go get -u golang.org/x/tools/cmd/goimports
    fi
script:
  # We could merge the two commands below for efficiency, but it would give less comprehensive errors
  # Check files syntax and basic formatting
  - |
    function checkEmpty() {
      if [ -n "$1" ]
      then
        echo -e "\nFiles with syntax or formatting errors ($ERR_FILES)\n"
        return 1
      fi  
    }
  # If a syntax error occurs, the following command fails
  - ERR_FILES=`find . -name "*.go" -execdir gofmt -l -s '{}' \+`
  # Then check formatting errors
  - checkEmpty "$ERR_FILES"
  # Check advanced files formatting, including imports
  - |
    if test $GOIMPORTS_CHECK -eq 1
    then
      ERR_FILES=`find . -name "*.go" -execdir goimports -l '{}' \+`
      checkEmpty "$ERR_FILES"
    fi

  # Run the test suite
  - go test -v ./...

# whitelist long living branches to avoid testing feature branches twice (as branch and as pull request)
branches:
  only:
    - master
    - /^v[0-9]+\.[0-9]+\.x$/
    - /^v[0-9]+\.[0-9]+\.[0-9]+$/