Fix SonarQube warning about missing reference for analysis (#796)

.cirrus.yml

@@ -11,6 +11,8 @@ env:
   CIRRUS_CLONE_DEPTH: 0
   # Use bash (instead of sh on linux or cmd.exe on windows)
   CIRRUS_SHELL: bash
+  BASE_BRANCH: ${CIRRUS_BASE_BRANCH}
+  DEFAULT_BRANCH: ${CIRRUS_DEFAULT_BRANCH}
 
 
 container_definition: &CONTAINER_DEFINITION
@@ -40,6 +42,7 @@ tooling_tests_task:
     - pipenv install
     - pipenv run pip install pytest pytest-cov
   tests_script:
+    - bash ci/fetch_branches.sh
     - cd rspec-tools
     - pipenv run pytest --cov=rspec_tools --cov-report=xml
   <<: *SETUP_SONAR_SCANNER
@@ -65,6 +68,7 @@ frontend_tests_task:
       - cd frontend
       - npm install
   tests_script:
+    - bash ci/fetch_branches.sh
     - cd frontend
     - npm run build
     - npm test -- --detectOpenHandles --coverage .

ci/fetch_branches.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+set -euo pipefail
+
+# When neither BASE_BRANCH nor DEFAULT_BRANCH are defined, fall back to "master".
+BRANCH="${BASE_BRANCH:-${DEFAULT_BRANCH:-master}}"
+git fetch --force origin "refs/heads/${BRANCH}:refs/remotes/origin/${BRANCH}"