[JIRA] (JENKINS-47978) Lightweight checkout not working for branches that contain forward slash '/'

Anna Tikhonova edited a comment on JENKINS-47978

Re: Lightweight checkout not working for branches that contain forward slash '/'

The workaround is to put 'refs/heads/feature/test' in Branch Specifier field of Git SCM. Not 'feature/test', not '*/feature/test'. You have to specify your git ref at full as this is the only supported case. See the breaking code in git-plugin (src/main/java//jenkins/plugins/git/GitSCMFileSystem.java):
{code:java}
@Extension(ordinal = Short.MIN_VALUE)
public static class BuilderImpl extends SCMFileSystem.Builder {

  @Override
  public boolean supports(SCM source) {
    return source instanceof GitSCM
      && ((GitSCM) source).getUserRemoteConfigs().size() == 1
      && ((GitSCM) source).getBranches().size() == 1
      && ((GitSCM) source).getBranches().get(0).getName().matches(
      "^((\\Q" + Constants.R_HEADS + "\\E.*)|([^/]+)|(\\*/[^/*]+(/[^/*]+)*))$"        // HERE !!
    );
  // we only support where the branch spec is obvious{code}
I think this simple implementation is good and the only issue here is the match failing silently. Probably, this method should put a warning to the Console explaining why lightweight checkout failed.

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