Dockerfile: cleanup style, add comments.

This commit is contained in:
Mike McQuaid 2022-12-13 10:40:41 +00:00
parent 917a1e7bff
commit 08644386e1
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@ -1,10 +1,15 @@
ARG version=22.04
# version is passed through by Docker.
# shellcheck disable=SC2154
FROM ubuntu:"${version}"
ARG DEBIAN_FRONTEND=noninteractive
# We don't want to manually pin versions, happy to use whatever
# Ubuntu thinks is best.
# hadolint ignore=DL3008
# shellcheck disable=SC2292
# /etc/lsb-release is checked inside the container and sets DISTRIB_RELEASE.
# shellcheck disable=SC1091,SC2154
RUN apt-get update \
&& apt-get install -y --no-install-recommends software-properties-common gnupg-agent \
&& add-apt-repository -y ppa:git-core/ppa \
@ -30,7 +35,7 @@ RUN apt-get update \
uuid-runtime \
tzdata \
jq \
&& if [ "$(. /etc/lsb-release; echo "${DISTRIB_RELEASE}" | cut -d. -f1)" -ge 18 ]; then apt-get install gpg; fi \
&& if [[ "$(. /etc/lsb-release; echo "${DISTRIB_RELEASE}" | cut -d. -f1)" -ge 18 ]]; then apt-get install gpg; fi \
&& apt-get remove --purge -y software-properties-common \
&& apt-get autoremove --purge -y \
&& rm -rf /var/lib/apt/lists/* \