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ci/README: document how to test docker images locally

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While here, fix the `docker build` command: the images are named `build_${IMG}`
while the ci files are just `ci/${IMG}`, no `build_` prefix.
This commit is contained in:
Nathaniel Filardo
2021-04-21 15:11:13 +01:00
committed by Nathaniel Wesley Filardo
parent 7b0c38228b
commit c132c86cf9
1 changed files with 9 additions and 2 deletions
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11
ci/README.md
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@@ -2,13 +2,20 @@
## Re-building an image after updating the docker file
Run `docker build -t snmallocciteam/$IMG:latest -f ci/$IMG .` from the root of the repo,
where `$IMG` is the image you want to rebuild, for example `build_linux_x64`
Run `docker build -t snmallocciteam/build_${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`