113 lines
2.3 KiB
Bash
Executable File
113 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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# Bring in the variables from SOLUTION file, supporting
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# nested substitution
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. SOLUTION
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. MANIFEST
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VARS=($(sed -nE "s,(^[^#][^=]*).*$,\1,pg" SOLUTION))
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VARS+=($(sed -nE "s,(^[^#][^=]*).*$,\1,pg" MANIFEST))
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for var in ${VARS[@]}; do
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export ${var}
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done
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case "${OS_DISTRO}" in
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rhel)
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SOLUTION_SUFFIX=".rhel-8.0"
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;;
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ubuntu)
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SOLUTION_SUFFIX=""
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;;
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*)
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SOLUTION_SUFFIX=".${OS_DISTRO}-${OS_RELEASE}"
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[[ -d "templates/${OS_DISTRO}" ]] || {
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echo "Unrecognized OS_DISTRO: '${OS_DISTRO}'"
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exit -1
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}
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;;
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esac
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[[ ! -e "Dockerfile.solution${SOLUTION_SUFFIX}" ]] && {
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cat << EOF
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'${OS_DISTRO}' set as OS_DISTRO, but Dockerfile.solution${SOLUTION_SUFFIX} does
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not exist.
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Using Dockerfile.solution instead.
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EOF
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SOLUTION_SUFFIX=""
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}
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export DOCKERFILE="Dockerfile${SOLUTION_SUFFIX}"
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export SOLUTION="Dockerfile.solution${SOLUTION_SUFFIX}"
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VARS+=("DOCKERFILE")
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VARS+=("SOLUTION")
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echo "Using '${SOLUTION}' to generate '${DOCKERFILE}'."
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# Build a SHELL-FORMAT value to pass to envsubst.
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# Only those variables matched in SHELL-FORMAT will
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# be escaped by envsubst.
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ENV=''
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for var in ${VARS[@]}; do
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ENV=${ENV}'$'${var}
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done
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# Remove the Dockerfile if it exists; should check
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# if it is clean first, and abort if not.
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#
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[ -e ${DOCKERFILE} ] && rm ${DOCKERFILE}
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cat << EOM > ${DOCKERFILE}
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#
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# DO NOT EDIT THIS DOCKERFILE
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#
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# This file is auto-generated via scripts/build-dockerfile
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# by using environment substitution while concatenating the
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# contents of templates/*, and then adding the contents
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# of ${SOLUTION}
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#
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# Most solution specific changes should be isolated in
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# ${SOLUTION}. After making changes, you can then re-run
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# scripts/build-dockerfile
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#
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EOM
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for snippet in templates/${OS_DISTRO}/??-*.in; do
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cat << EOM >> ${DOCKERFILE}
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#
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# Template from ${snippet}
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#
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EOM
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envsubst ${ENV} < $snippet >> ${DOCKERFILE}
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done
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cat << EOM >> ${DOCKERFILE}
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#
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# Solution begins here (from ${SOLUTION})
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#
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EOM
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envsubst ${ENV} < ${SOLUTION} >> ${DOCKERFILE}
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cat << EOM >> ${DOCKERFILE}
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#
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# Standard ending begins here (from templates/ending.in)
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#
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EOM
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envsubst ${ENV} < templates/ending.in >> ${DOCKERFILE}
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cat << EOM
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${DOCKERFILE} has been updated.
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To build the image, you can run:
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OS_DISTRO=${OS_DISTRO} OS_RELEASE=${OS_RELEASE} scripts/build-image.sh
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EOM
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