builder: add --no-install-recommends to apt-get install

This was triggered by Ubuntu Kinetic pulling in a version of
systemd-resolved that breaks inside Docker. systemd-resolved
is an indirect (via Recommends somewhere) dependency of devscripts,
which we need.

However, if we were relying on Recommends, that was a bug, so I'm
applying the flag to all distributions.

diff --git a/builder-support/dockerfiles/Dockerfile.debbuild-prepare b/builder-support/dockerfiles/Dockerfile.debbuild-prepare
index cd339437c0cb17adef7e6121fb19a5265ff8f3c3..2c8626e1e4b5ad5605750c4311a00c2b5aa94f1a 100644 (file)
--- a/builder-support/dockerfiles/Dockerfile.debbuild-prepare
+++ b/builder-support/dockerfiles/Dockerfile.debbuild-prepare
@@ -1,6 +1,6 @@
 FROM dist-base as package-builder
 ARG APT_URL
-RUN DEBIAN_FRONTEND=noninteractive apt-get -y install devscripts dpkg-dev build-essential python3-venv equivs
+RUN DEBIAN_FRONTEND=noninteractive apt-get -y install --no-install-recommends devscripts dpkg-dev build-essential python3-venv equivs
 
 RUN mkdir /dist /pdns
 WORKDIR /pdns