Docker Semantic Versioning

Purpose

Allow for easier generation of semantic versions based on semver.org.

Building the image

> docker build -t docker-versioner .

Available Variables

ENV Var	Example	Description
version_base	3.0.0	The base version to use, ignored unless ignorePrevious is true.
version_ignorePrevious	true	If true the previous tags on the repo will be ignored when determining a version.
version_pattern	*.^.*	How to increment a version, * will leave alone, ^ will increment by 1
version_prerelease	432345	Append pre-release data, this defaults to being a timestamp. After a - character
version_metadata	alpha	Append release metadata, no default. After a + character.

Usage

Basic

> docker run -v "$(pwd):/tmp" -w /tmp --rm -e version_base=1.3.5 -e version_ignorePrevious=true quay.cnqr.delivery/da-workflow/docker-versioner
# output 1.4.0

Customizing the increment

> docker run -v "$(pwd):/tmp" -w /tmp --rm -e version_base=2.4.0 -e version_ignorePrevious=true -e version_pattern="^.*.*" quay.cnqr.delivery/da-workflow/docker-versioner
# output 3.0.0

> docker run -v "$(pwd):/tmp" -w /tmp --rm -e version_base=2.1.0 -e version_pattern="*.*.^" quay.cnqr.delivery/da-workflow/docker-versioner
# output 2.1.1