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  1. Jenkins
  2. JENKINS-45987

Cannot build merge requests from Gitlab on a multibranch pipeline job after Git plugin update to version 3.5.0

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      Previous to the update of the git plugin everything was working fine (with Git plugin version 3.4.1).

      After updating to version 3.5.0 now I am not able to build neither merque-requests nor tags, I only see regular branches from the repository (GitLab by the way).

      I've been looking changes made in the code, more precisely changes made in

      src/main/java/jenkins/plugins/git/AbstractGitSCMSource.java

      There has been a major change in the way branches are discovered (that can be seen in the function "discoverBranches"):

      • 3.4.1 - In this version, "client.getRemoteBranches" is used, which I guess, corresponds to a "git branch -r". Then it parses the output to get the names of the branches.
      • 3.5.0 - In this version, "client.getRemoteReferences" is used, that corresponds to a "git ls-remote -h". Then, it parses the output to get the names of the branches.

      I've set "Specify ref specs" with the needed values to be able to fetch  the merge-requests and the tags ('+refs/merge-requests//head:refs/remotes/origin/merge-requests/' and '+refs/tags/:refs/remotes/origin/tags/').

      If I perform manually both operations ("git branch -r" and "git ls-remote -h") the output is not the same:

      $ git branch -r
      origin/HEAD -> origin/master

      origin/feature/generic-tag-attribute
      origin/merge-requests/1
      origin/merge-requests/2
      origin/merge-requests/3
      origin/tags/v1.5.0-alpha.0

      and

      $ git ls-remote -h 
      From http:/**********
      2c26dca25a748017ff52b22d81c549506abc12be refs/heads/feature/generic-tag-attribute
      1f43ef826799500cb585273eca3517c8a5eb026a refs/heads/master

      In the first example (mimics Git plugin 3.4.1) I get merge-requests and tags, in the second (mimics 3.5.0) I don't.

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              amarruedo Asier Marruedo
              amarruedo Asier Marruedo
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