`match init` assumes a default branch of `master` when using git storage, which is no longer the Github default about fastlane

[lacostej]

It sounds like a good idea. Here are 2 complementing ideas to your proposal:

1. we try detect the default branch name.

def default_git_branch
  default_branch  = Fastlane::Actions.git_remote_branch_name(nil)
  default_branch = default_branch.split("\n")[0] if default_branch
  default_branch ||= "main"
end

or

def default_git_branch
  begin
    first_remote = Fastlane::Actions.sh("git remote | head -1", log: false).chomp
    default_branch = Fastlane::Actions.git_remote_branch_name(first_remote)
  rescue => e
  end
  default_branch ||= "main"
end

Also I am using here "main" as default branch. Any reason we should stick to master? We will eventually have to change, right?

Side note: I wish the git_remote_branch_name method was fixed to only return the head of the first remote. We could maybe add a fix for that first. It doesn't really make sense to return a "master\nmaster" if you have 2 remotes with master as default branch. It would also make this code simpler, something like

def default_git_branch
  default_branch  = Fastlane::Actions.git_remote_branch_name(nil)
  default_branch ||= "main"
end

2. if we really want to ask the user, we could combine asking the user and identifying the default_branch using the above code as first default choice.

Feel free to start your PR, consider using one of the 2 options above.