/spike-docker-git-tagging

Primary LanguageJava

Docker and Git info spike

Just a spike how to to capture the meta data from git into a project.

This is done with some examples from https://blog.scottlowe.org/2017/11/08/how-tag-docker-images-git-commit-information/

Build arg

Command like docker build -t spike --build-arg GIT_COMMIT=$(git rev-parse HEAD) . and you need values specified in the docker file like

ARG GIT_COMMIT=unspecified
LABEL git_commit=$GIT_COMMIT

Label command at build time

Command like docker build -t spike --label GIT_COMMIT=$(git rev-parse HEAD) .

To see the labels on a docker image

To see all the labels docker inspect -f {{.Config.Labels}} spike

To see a specific label docker inspect --format "{{ index .Config.Labels \"GIT_COMMIT\"}}" spike

Get maven info at runtime

There are commands that you can run to get the info that is required like mvn --batch-mode org.apache.maven.plugins:maven-help-plugin:3.1.0:evaluate -Dexpression=project.groupId

However an alternative might be to build a json file and that cat that file to the label argument.