feat: manage Sonar task cache in GitLab

templates/gitlab-ci-sonar.yml

@@ -303,9 +303,13 @@ sonar:
     - name: "$TBC_TRACKING_IMAGE"
       command: ["--service", "sonar", "3.0.0" ]
   variables:
-    # Tells git to fetch all the branches of the project, required by the analysis task
-    # see: https://docs.sonarqube.org/8.5/analysis/gitlab-cicd/#header-2
-    GIT_DEPTH: 0
+    # see: https://docs.sonarqube.org/latest/analysis/gitlab-integration/#header-4
+    SONAR_USER_HOME: "${CI_PROJECT_DIR}/.sonar" # Defines the location of the analysis task cache
+    GIT_DEPTH: 0 # Tells git to fetch all the branches of the project, required by the analysis task
+  cache:
+    key: "sonar"
+    paths:
+      - .sonar/cache
   before_script:
     - *sonar-scripts
     - install_ca_certs "${CUSTOM_CA_CERTS:-$DEFAULT_CA_CERTS}"