# Keeping CI images up to date

## Re-building an image after updating the docker file

Run `docker build -t snmallocciteam/build_${IMG}:latest -f ci/${IMG} .` from the root of the repo,
where `$IMG` is the image you want to rebuild, for example `linux_x64`

If you are building a multiarch image, ie. an image targeting an architecture other than
the one you are running, you will need to install the qemu handler before you can build:
`sudo docker run --rm --privileged multiarch/qemu-user-static:register --reset`

## Testing locally

Having built a docker image, you can build your current tree therein with

    docker run --rm -u $(id -u) -v ${PWD}:/opt:ro snmallocciteam/build_${IMG}:latest \
      sh -c "cd /tmp; CC=clang-10 CXX=clang++-10 BUILD_TYPE=Debug SNMALLOC_SRC=/opt /opt/ci/scripts/build.sh && (cd build; ninja test)"

## Pushing the updated docker image to Docker Hub

Run `docker push snmallocciteam/$IMG:latest`

## Permissions

You must be part of the [snmalloc ci team](https://hub.docker.com/orgs/snmallocciteam) to
push updated images. Contact @mjp41, or @achamayou to be given access.