70763e20e7
During docker build, host files can be passed to the docker build through
docker context files. But there is no straightforward way to transfer
the files from docker build to host.
This feature provides a tricky way to pass the cache contents from docker
build to host. It tar's the cached content and encodes them as base64 format
and passes it through a log file with a special tag as 'VCSTART and VCENT'.
Slave.mk in the host, it extracts the cache contents from the log and stores them
in the cache folder. Cache contents are encoded as base64 format for
easy passing.
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#### Why I did it
#### How I did it
#### How to verify it
39 lines
1.6 KiB
Bash
Executable File
39 lines
1.6 KiB
Bash
Executable File
#!/bin/bash
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set -x
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DOCKER_IMAGE=$1
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TARGET_PATH=$2
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DOCKER_IMAGE_TAG=$3
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DOCKER_PATH=$4
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DOCKER_FILE=$5
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[ -z "$TARGET_PATH" ] && TARGET_PATH=./target
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DOCKER_IMAGE_NAME=$(echo $DOCKER_IMAGE | cut -d: -f1 | sed "s/-$DOCKER_USERNAME\$//")
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#Create the container specific to the user tag and slave tag
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DOCKER_CONTAINER=${DOCKER_IMAGE_TAG/:/-}
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TARGET_VERSIONS_PATH=$TARGET_PATH/versions/dockers/$DOCKER_IMAGE_NAME
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[ -d $TARGET_VERSIONS_PATH ] && rm -rf $TARGET_VERSIONS_PATH
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mkdir -p $TARGET_VERSIONS_PATH
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export DOCKER_CLI_EXPERIMENTAL=enabled
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# Remove the old docker container if existing
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if docker container inspect $DOCKER_IMAGE > /dev/null 2>&1; then
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docker container rm $DOCKER_IMAGE > /dev/null
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fi
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docker create --name $DOCKER_CONTAINER --entrypoint /bin/bash $DOCKER_IMAGE_TAG
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docker cp -L $DOCKER_CONTAINER:/etc/os-release $TARGET_VERSIONS_PATH/
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docker cp -L $DOCKER_CONTAINER:/usr/local/share/buildinfo/pre-versions $TARGET_VERSIONS_PATH/
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docker cp -L $DOCKER_CONTAINER:/usr/local/share/buildinfo/post-versions $TARGET_VERSIONS_PATH/
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# Save the cache contents from docker build
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IMAGENAME=${DOCKER_IMAGE_TAG} j2 files/build_templates/build_docker_cache.j2 > ${DOCKER_FILE}.cleanup
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docker tag ${DOCKER_IMAGE_TAG} tmp-${DOCKER_IMAGE_TAG}
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DOCKER_BUILDKIT=1 docker build -f ${DOCKER_PATH}/Dockerfile.cleanup --target output -o target/vcache/${DOCKER_IMAGE_NAME} ${DOCKER_PATH}
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DOCKER_BUILDKIT=1 docker build -f ${DOCKER_PATH}/Dockerfile.cleanup --no-cache --target final --tag ${DOCKER_IMAGE_TAG} ${DOCKER_PATH}
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docker rmi tmp-${DOCKER_IMAGE_TAG}
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docker container rm $DOCKER_CONTAINER
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