When you develop with golang in a team, sometimes someone (it's me!) forget to include
go.mod , or forget to run
go mod tidy .
Then the diffs will be included in other pull request. (That sucks)
To keep correct versioning and make code (and team member's emotions) healthy, it's good to setup
go mod tidy on CI.
It's quite easy, run
go mod tidy then
git diff --exit-code -- go.mod go.sum
So CI can detect diffs and emit fail signal to GitHub pull request.
This is example of GitHub Actions job.
# .github/workflows/test_mod_tidy.yml name: tidy on: [push] jobs: tidy: name: go mod tidy runs-on: ubuntu-latest steps: - name: Set up Go 1.14 uses: actions/setup-go@v2 with: go-version: 1.14.2 id: go - name: setup env run: | echo "::set-env name=GOPATH::$(go env GOPATH)" echo "::add-path::$(go env GOPATH)/bin" shell: bash - name: Check out code uses: actions/checkout@v2 - name: go mod tidy run: | go mod tidy git diff --exit-code -- go.mod go.sum
If you did
go mod tidy but somehow fail in CI , try these things
go clean -modcache
Live example is here