build.bash

CONTEXT_DIR=$(mktemp --directory)
MAIN_PACKAGES=$(go list -f '{{- if eq .Name "main"}}{{- .ImportPath}}{{"\n"}}{{- end}}' ./... | grep --perl-regexp '.+')
readarray -t MAIN_PACKAGES <<<"${MAIN_PACKAGES}"
for MAIN_PACKAGE in "${MAIN_PACKAGES[@]}"; do
	PROGRAM=$(basename "${MAIN_PACKAGE}")
	CGO_ENABLED=0 go build "${@}" -o "${CONTEXT_DIR}/bin/${PROGRAM}" "${MAIN_PACKAGE}"
done
if [[ -d etc ]]; then
	cp --recursive --no-target-directory etc "${CONTEXT_DIR}/etc"
fi

COMMAND=(docker build --file=- --tag="${IMAGE}")
COMMAND+=(--label="org.opencontainers.image.created=$(date --rfc-3339=date)")
COMMAND+=(--label="org.opencontainers.image.authors=$(git log -1 --pretty=format:'%an <%ae>')")
COMMAND+=(--label="org.opencontainers.image.source=$(git remote get-url origin)")
COMMAND+=(--label="org.opencontainers.image.revision=$(git rev-parse HEAD)")
COMMAND+=(--label="org.opencontainers.image.ref.name=${IMAGE}")
COMMAND+=(--label="go.version=$(go version | grep --perl-regexp --only-matching --max-count=1 '(?<=go)\d+\.\d+')")
COMMAND+=("${CONTEXT_DIR}")
PROJECT=$(basename "$(git remote get-url origin)" .git)
"${COMMAND[@]}" <<EOF
FROM alpine:3.18
ENV IMAGE=${IMAGE@Q}
COPY . /opt/${PROJECT@Q}
WORKDIR /opt/${PROJECT@Q}
EOF

rm --recursive --force "${CONTEXT_DIR}"

docker push "${IMAGE}"