Sonar-scanner unable to find baseline tag for a project


I need some help to calculate new code for a branch where baseline is a tag.

Must-share information (formatted with Markdown):

  • which versions are you using (SonarQube, Scanner, Plugin, and any relevant extension)
    SonarQube Developer Edition Version 8.6.1 (build 40680) (On premises)
    sonarsource/sonar-scanner-cli:latest Using docker image sha256:497d58079641d52a72898b32a885f35ee75ca6a048e458678bd36664c0ada366
    gitlab CI to trigger sonar-scanner
  • what are you trying to achieve
    I am trying to set a tag as baseline version in a project in sonarqube to get New Code details compared between latest sha in the branch against a tag.
  • what have you tried so far to achieve this
    Analyzed the branch using gitlab CI → project branch is created with branch “br1”
    Analyzed the tag using gitlab CI → another project branch created with “v0.1”
    In project settings set baseline for branch “br1” as “v0.1”
    Rerun the analysis on branch1
    Output → the analysis was successful, but new code was not calculated.
    In sonar-scanner log I see an error as below:
INFO: Load New Code definition
INFO: Load New Code definition (done) | time=42ms
INFO: Computing New Code since fork with 'v0.1'
WARN: Could not find ref: v0.1 in refs/heads, refs/remotes/upstream or refs/remotes/origin
WARN: Branch 'v0.1' not found in git
WARN: Failed to detect fork date. No New Code will be computed.

I tried using git fetch origin --tags and git fetch origin '+refs/tags/*:refs/tags/*' before triggering the scanner. But per the output it is not looking for tags.
Is there any way we can make the scanner look for tags. Appreciate your time.

(post deleted by author)

Hi. I could get this to work by doing a clone - GIT_STRATEGY: clone - instead of shallow clone in gitlab CI just once. However, it started failing again.
The problem is when I set a git tag (already analysed and uploaded to SonarQube as a branch) as baseline. It fails to detect the tag. If I set a branch as baseline, it works OK. Is there anyway to make the scanner look at ref/tags?

My current .gitlabci.yml for reference is as below:

  image: sonarsource/sonar-scanner-cli:latest
    GIT_STRATEGY: clone
    key: "${CI_JOB_NAME}"
      - .sonar/cache
    - sonar-scanner -Dsonar.projectVersion=${CI_COMMIT_SHA:0:7} $CMDLET
    - git show-ref v0.0.1 # shows reference from refs/tags
    - git show-ref $CI_COMMIT_REF_NAME # shows reference from refs/heads

I tried git fetch --all, git fetch origin --tags, git config --add remote.origin.fetch "+refs/tags/*:refs/tags/*" and the scanner only looks in refs/heads, refs/remotes/upstream or refs/remotes/origin. I guess the solution could be somehow to make the scanner look at refs/tags too. Can you please help. Thank you.