legg / tedd

Target Environment Driven Development demo code

This repo demonstrates conditional compilation using cargo feature flags. The pipeline in drone passes feature flags as Docker --build-args and then to the target environment using an Ansible Playbook.

Deployment

Ansible playbook lives here ./.deploy and the drone file uses jsonnet .drone.jsonnet as a data template for defining a pipeline per environment.

Useful commands when run outside drone

docker build -t pig --build-arg FLAGS="--features pig" .

docker run -t pig
docker tag pig 192.168.10.100:5000/pig:latest
docker push 192.168.10.100:5000/pig:latest

ansible-playbook --inventory .deploy/inventory.yaml \
    --extra-vars container_name=pig --extra-vars image=pig:latest \
    --extra-vars registry=192.168.10.100:5000 --extra-vars network=host \
    --private-key ~/.ssh/id_rsa_drone --user $USER \
    .deploy/playbook.yaml

Branches

For the demo there are 5 branches, each builds on top of the previous one

• 1example - initial example
• 2pig - add a second implementation of the Animal trait
• 3conditional - add conditional compile flags for Sheep and Pig
• 4refactor - create modules out of Sheep and Pig to clean up cfg_attr usage
• master - the fluff