Spent 2 hours to figure out how to automate Coveralls checking in CircleCI, the online articles are really outdated and not working…

Solution

You will need this library github.com/mattn/goveralls

The idea is to run test coverage and save it into a file, then use the above lib to post it to Coveralls.

Don’t forget to put $COVERALLS_TOKEN in your CircleCI.

The tricky part is to find out how to save the output file and how to pick it up using goveralls lib…

Here is the compete config.yml

version: 2.1

jobs:
  build:
    docker:
      - image: circleci/golang:1.12
    steps:
      - checkout
      - run:
          name: run build
          command: |
            go build -v
  test:
    working_directory: ~/test
    docker:
      - image: circleci/golang:1.12
    steps:
      - checkout
      - run:
          name: run test
          command: |
            GO111MODULE=off go get github.com/mattn/goveralls
            go test -v -cover -race -coverprofile=coverage.out
            $GOPATH/bin/goveralls -coverprofile=/home/circleci/test/coverage.out -service=circle-ci -repotoken=$COVERALLS_TOKEN



workflows:
  version: 2.1
  build_and_test:
    jobs:
      - build
      - test