semver.py

#!/usr/bin/env python
import os
import semver
import subprocess
import sys


def git(*args):
    return subprocess.check_output(["git"] + list(args))


def tag_repo(tag):
    push_url = "https://{}:{}@{}/{}/{}.git".format(os.environ['CI_PUSH_USER'],
                                                   os.environ['CI_PUSH_TOKEN'],
                                                   os.environ['GITLAB_HOST'],
                                                   os.environ['CI_PROJECT_NAMESPACE'],
                                                   os.environ['CI_PROJECT_NAME'])
    print(push_url)

    git("remote", "set-url", "--push", "origin", push_url)
    git("tag", tag)
    git("push", "origin", tag)


def bump(latest):
    try:
        commit_msg = " ".join([i for i in git("log", "-1", "--pretty=%B").decode().strip().split("\n")
                               if not i.startswith("#")])
    except subprocess.CalledProcessError:
        commit_msg = "bump"
    if "bump-major" in commit_msg:
        return semver.bump_major(latest)
    if "bump-minor" in commit_msg:
        return semver.bump_minor(latest)
    return semver.bump_patch(latest)


def main():
    try:
        latest = git("describe", "--tags").decode().strip()
    except subprocess.CalledProcessError:
        # No tags in the repository
        version = "0.0.1"
    else:
        # Skip already tagged commits
        if '-' not in latest:
            print(latest)
            return 0
        version = bump(latest)
        if version == -1:
            return 0
    tag_repo(version)
    print(version)
    return 0


if __name__ == "__main__":
    sys.exit(main())