Semantic Versioning on Private Library Package for Golang 1.13

What we need?

• Golang version 1.13 or above

  • GOPRIVATE introduced to go module since 1.13
  • multi section of GOPROXY introduced to go module since 1.13

• Running Gitlab

  • Certainly, We need it host our private code. I assumed your gitlab running happily at http://foo.bar.com

Configure go.mod file for Library Package

• Init a package named group/project

  go mod init foo.bar.com/group/project

• Write some bugs with few lines of functional code, then commit and push.

• Release your package with Semantic Version

  git tag -a v1.0.0 -m "release v1.0.0 for semantic version testing"
git push --tags

• Checkout your hard work on Gitlab.

Use Private Library Package For Versioning

• Make sure your GOPRIVATE and GOPROXY works as well as we expect.

  GOPRIVATE=foo.bar.com
GOPROXY=https://goproxy.io,direct

  Be careful :

  • GOPRIVATE=foo.bar.com means : all Packages from foo.bar.com was private package, go build will skip checksum cuz we trust our teammate. lol.
  • You may have your own setting of GOPROXY, always make sure direct section was placed EXACTLY at the end of this line. For now, our configuration means : If go build can't find package foo.bar.com/group/project via https://goproxy.io/group/project Then it will try to find it via http://foo.bar.com/group/project

• Access your git repo

  • Use SSH instead of HTTP

    git config --global url."[email protected]:".instead of "http://foo.bar.com/"

  • Setup SSH public key on gitlab, You can easily make it via Google.

• Pull the Trigger

  • Import library package and use it

    go get -u -v foo.bar.com/group/[email protected]
go build -v .

Migrate to Docker

• Use key pair for Docker build

  ssh-keygen -f /path/to/build-key

  Change your docker file

  COPY/path/to/build-key` ~/.ssh/id_rsa

  Setup SSH public key /path/to/build-key.pub on gitlab.