Merge !1259: .gitlab-ci: Coverity scan

Implements #450

.gitlab-ci.yml

@@ -254,6 +254,23 @@ lint:tidy:
   script:
     - ninja -C build_ci* tidy
 
+# Coverity reference: https://www.synopsys.com/blogs/software-security/integrating-coverity-scan-with-gitlab-ci/
+lint:coverity:
+  <<: *sanity
+  image: $CI_REGISTRY/knot/knot-resolver/ci/debian-11-coverity:knot-$KNOT_VERSION
+  only:
+    refs:
+      - nightly@knot/knot-resolver
+      - coverity@knot/knot-resolver
+  script:
+    - meson build_ci_cov --prefix=$PREFIX
+    - /opt/cov-analysis/bin/cov-build --dir cov-int ninja -C build_ci_cov
+    - tar cfz cov-int.tar.gz cov-int
+    - curl https://scan.coverity.com/builds?project=$COVERITY_SCAN_PROJECT_NAME
+      --form token=$COVERITY_SCAN_TOKEN --form email="knot-resolver@labs.nic.cz"
+      --form file=@cov-int.tar.gz --form version="`git describe --tags`"
+      --form description="`git describe --tags` / $CI_COMMIT_TITLE / $CI_COMMIT_REF_NAME:$CI_PIPELINE_ID"
+
 .kres-gen: &kres-gen
   <<: *sanity
   script:

ci/images/build.sh

@@ -5,4 +5,9 @@ CURRENT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
 source "${CURRENT_DIR}"/vars.sh "$@"
 set -ex
 
-docker build --no-cache -t "${FULL_NAME}" "${IMAGE}" --build-arg KNOT_BRANCH=${KNOT_BRANCH}
+if [ -n "$COVERITY_SCAN_TOKEN" ]; then
+	SECRETS="$SECRETS --secret id=coverity-token,env=COVERITY_SCAN_TOKEN"
+fi
+
+export DOCKER_BUILDKIT=1 # Enables using secrets in docker-build
+docker build --no-cache -t "${FULL_NAME}" "${IMAGE}" --build-arg KNOT_BRANCH=${KNOT_BRANCH} $SECRETS

ci/images/debian-11-coverity/Dockerfile

+# SPDX-License-Identifier: GPL-3.0-or-later
+
+FROM debian:bullseye
+MAINTAINER Knot Resolver <knot-resolver@labs.nic.cz>
+# >= 3.0 needed because of --enable-xdp=yes
+ARG KNOT_BRANCH=3.1
+ARG COVERITY_SCAN_PROJECT_NAME=CZ-NIC/knot-resolver
+ENV DEBIAN_FRONTEND=noninteractive
+
+WORKDIR /root
+CMD ["/bin/bash"]
+
+# generic cleanup
+RUN apt-get update -qq
+
+# Knot and Knot Resolver dependencies
+RUN apt-get install -y -qqq git make cmake pkg-config meson \
+	build-essential bsdmainutils libtool autoconf libcmocka-dev \
+	liburcu-dev libgnutls28-dev libedit-dev liblmdb-dev libcap-ng-dev libsystemd-dev \
+	libelf-dev libmnl-dev libidn11-dev libuv1-dev \
+	libluajit-5.1-dev lua-http libssl-dev libnghttp2-dev
+
+# LuaJIT binary for stand-alone scripting
+RUN apt-get install -y -qqq luajit
+
+# build and install latest version of Knot DNS
+RUN git clone --depth=1 --branch=$KNOT_BRANCH https://gitlab.nic.cz/knot/knot-dns.git /tmp/knot
+WORKDIR /tmp/knot
+RUN pwd
+RUN autoreconf -if
+RUN ./configure --prefix=/usr --enable-xdp=yes
+RUN CFLAGS="-g" make
+RUN make install
+RUN ldconfig
+
+# curl and tar (for downloading Coverity tools and uploading logs)
+RUN apt-get install -y curl tar
+
+RUN --mount=type=secret,id=coverity-token \
+	curl -o /tmp/cov-analysis-linux64.tar.gz https://scan.coverity.com/download/cxx/linux64 \
+	--form project=$COVERITY_SCAN_PROJECT_NAME --form token=$(cat /run/secrets/coverity-token)
+RUN tar xfz /tmp/cov-analysis-linux64.tar.gz
+RUN mv cov-analysis-linux64-* /opt/cov-analysis