ci: Support building a CI image for Coverity Scan builds

This will be used in an upcoming scheduled CI job.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

.gitlab-ci.yml

@@ -11,6 +11,7 @@ cache:
 
 variables:
   FEDORA_IMAGE: "registry.gitlab.gnome.org/gnome/glib/fedora:v9"
+  COVERITY_IMAGE: "registry.gitlab.gnome.org/gnome/glib/coverity:v1"
   DEBIAN_IMAGE: "registry.gitlab.gnome.org/gnome/glib/debian-stable:v6"
   ANDROID_IMAGE: "registry.gitlab.gnome.org/gnome/glib/android-ndk:v3"
   MINGW_IMAGE: "registry.gitlab.gnome.org/gnome/glib/mingw:v2"

.gitlab-ci/README.md

@@ -8,7 +8,10 @@ GitLab CI jobs run in a Docker image, defined here. To update that image
 1. Edit `.gitlab-ci/Dockerfile` with the changes you want
 1. Run `.gitlab-ci/run-docker.sh build --base=debian-stable --base-version=1` to
    build the new image (bump the version from the latest listed for that `base`
-   on https://gitlab.gnome.org/GNOME/glib/container_registry)
+   on https://gitlab.gnome.org/GNOME/glib/container_registry). If rebuilding the
+   `coverity.Dockerfile` image, you’ll need to have access to [Coverity Scan][cs]
+   and will need to specify your project name and access token as the environment
+   variables `COVERITY_SCAN_PROJECT_NAME` and `COVERITY_SCAN_TOKEN`.
 1. Run `.gitlab-ci/run-docker.sh push  --base=debian-stable --base-version=1` to
    upload the new image to the GNOME GitLab Docker registry
     * If this is the first time you're doing this, you'll need to log into the
@@ -21,3 +24,4 @@ GitLab CI jobs run in a Docker image, defined here. To update that image
    image
 
 [pat]: https://gitlab.gnome.org/profile/personal_access_tokens
+[cs]: https://scan.coverity.com/

.gitlab-ci/coverity.Dockerfile

@@ -0,0 +1,11 @@
+FROM registry.gitlab.gnome.org/gnome/glib/fedora:v9
+
+ARG COVERITY_SCAN_PROJECT_NAME
+ARG COVERITY_SCAN_TOKEN
+
+RUN curl https://scan.coverity.com/download/linux64 \
+    -o /tmp/cov-analysis-linux64.tgz \
+    --form project="${COVERITY_SCAN_PROJECT_NAME}" \
+    --form token="${COVERITY_SCAN_TOKEN}" \
+ && tar xfz /tmp/cov-analysis-linux64.tgz \
+ && rm /tmp/cov-analysis-linux64.tgz

.gitlab-ci/run-docker.sh

@@ -103,6 +103,8 @@ if [ $build == 1 ]; then
         echo -e "\e[1;32mBUILDING\e[0m: ${base} as ${TAG}"
         $SUDO_CMD docker build \
                 --build-arg HOST_USER_ID="$UID" \
+                --build-arg COVERITY_SCAN_PROJECT_NAME="${COVERITY_SCAN_PROJECT_NAME}" \
+                --build-arg COVERITY_SCAN_TOKEN="${COVERITY_SCAN_TOKEN}" \
                 --tag "${TAG}" \
                 --file "${base}.Dockerfile" .
         exit $?