This Docker image helps automate semantic versioning by using PBR under the hood.
PBR will auto-increment your build from the last version based on your commit messages between the last release. If there's nothing special in them then the next version will be a Patch version. If you include Sem-Ver: feature at the beginning of any line of your commit message, then when calculating your next version, PBR will bump it to the next Minor version. Check the documentation for more Sem-Ver pseudo headers.
To calculate the next version, all you need to do is run this command with your project's name replacing my-project-name:
docker run -v my-project-name/.git:/pbr/.git -it myyk/docker-semantic-version
See the PBR documentation for more on how to use the auto-incrementing semantic versioning Sem-Ver git commit annotation.