Gitlab-CI version manager

Simple script which allows you to bump up version of your project based on GitLab MR labels. Versions are bumped as git tags, so it's language-agnostic in terms of the project language.

Versions are created via semver structure and these MR labels are supported:

• major - set this if you need to bump MAJOR version of your project (x.0.0)
• feature - set this if you need to bump MINOR version of your project (0.x.0)
• bug - set this ir you need to bump PATCH version of your project (0.0.x)

I think later I'll add more exotic stuff

How to integrate it in GitLab-CI

We have this step in our pipelines:

# Fail MR pipeline if no appropriate labels were set
check-version:
  stage: build
  only:
    - merge_requests
  script:
    - echo $CI_MERGE_REQUEST_LABELS | grep -e 'bug' -e 'chore' -e 'feature' -e 'major'

We're looking for these MR labels:

• major: This is a major change that should be thoroughly reviewed. Will bump MAJOR project version
• feature: This is for adding a feature. Will bump MINOR project version
• bug: This is a fix for the bug. Will bump PATCH project version
• chore: Changes to things that don't affect the app code itself. Will not bump project version. Docs, build system, tests and alike

It was created to run in GitLab-CI environment and it expects these environment variables to function properly:

• CI_PROJECT_ID - Project ID from GitLab. You can find it on the overview page
• CI_SERVER_HOST - GitLab instance URL (without https://)
• CI_DEFAULT_BRANCH - Your trunk branch, on which you need to tag releases
• TOKEN - Your private deploy token (you can create one in your profile -> Settings -> Access Tokens)

It using GitLab API requests. Example URL for GitLab API request:
https://gitlab.example.com/api/v4/projects/123/merge_requests/456?private_token=TOKEN

You can run it in Docker or by itself

Run script in Docker

$ docker build -t glci:volatile .
Create .env file with appropriate values (or you can just provide environment variables to Docker with -e flags)
$ docker run --env-file .env glci:volatile

Run script by itself

$ pip install -r requirements.txt
Change release.py to provide needed environment variables (or just provide variables in launch time)
$ python release.py

Release process

Create release branch
curl -X POST --header "PRIVATE-TOKEN: token" "https://gitlab.example.com/api/v4/projects/123/repository/branches?branch=release-30&ref=develop"

Commit to branch
curl --request POST
--form "branch=release-30"
--form "commit_message=Release 30 is here"
--form "actions[][action]=create"
--form "actions[][file_path]=version"
--form "actions[][content]=release-30"
--header "PRIVATE-TOKEN: Mwq6NSLebncasAAa_Zq6"
"https://gitlab.example.com/api/v4/projects/123/repository/commits"