Faster image building iteration

[michel-tricot]

What

Use the build from the local environment to build images instead of running the build in a container
Pros:

• Fast, build incrementality
  Cons:
• Potential side effect on the host system
• running docker-compose -f xxx build now requires that gradle build was called before

As we iterate on getting things to work, that will save us a LOT of time

How

Each project which generate an artifact has a dockerfile which copies from the project directory

to build and docker-compose build: ./gradlew composeBuild. It will build the code and build the image local

[cgardens]

Potential side effect on the host system

I think we can skirt this by using reproducible builds in gradle. i started messing with them a little yesterday.

Do we understand why things are so much slower in the docker container? I know that when I run clean build locally it is faster versus in the docker container, so it's not just that some modules don't need to be recompiled.

Would moving node modules fetching into their own docker image be worthwhile like what you did with build-base?

Leaving a comment because I think I need some info before I cast a vote.

[cgardens]

running docker-compose -f xxx build now requires that gradle build was called before

the way you have it setup here, won't gradle build just run docker-compose etc... which removes this con that you mentioned?