language: go

go:
  - 1.9
  - master 

install:
    - go get -t ./...

matrix:
  allow_failures:
    - go: master
  # Don't wait for tip tests to finish. Mark the test run green if the
  # tests pass on the stable versions of Go.
  fast_finish: true

notifications:
  email: false

# Anything in before_script that returns a nonzero exit code will
# flunk the build and immediately stop. It's sorta like having
# set -e enabled in bash. 
before_script:
  - GO_FILES=$(find . -iname '*.go' -type f)  # All the .go files
  - go get github.com/golang/lint/golint      # Linter
  - go get honnef.co/go/tools/cmd/megacheck   # Badass static analyzer/linter
  - go get github.com/fzipp/gocyclo

# script always run to completion (set +e). All of these code checks are must haves
# in a modern Go project.
script:
  - test -z $(gofmt -s -l $GO_FILES)         # Fail if a .go file hasn't been formatted with gofmt
  - go vet ./...                             # go vet is the official Go static analyzer
  - megacheck ./...                          # "go vet on steroids" + linter
  - gocyclo -over 19 $GO_FILES               # forbid code with huge functions
  - golint -set_exit_status $(go list ./...) # one last linter