How to use Ruby's "git" gem to push back to GitHub-CodePudding

When I try to use the git gem to push, I get this error: src refspec master does not match any. My repo uses main instead of master; but (assuming that is the problem), I don't see how to change the upstream branch.

Details:

I am writing a Ruby script that modifies a set of existing, already cloned repositories and pushes the changes. I'm using the git gem (https://github.com/ruby-git/ruby-git)

Here is the minimal example:

git_dir = '.'
begin
  $stderr.puts "Opening with git_dir: #{git_dir}"
  g = Git.open("#{git_dir}", :raise => true)
  g.config('remote.remote-name.push', 'refs/heads/main:refs/heads/main')
  $stderr.puts "Current branch:  #{g.current_branch}"

  if g.status.changed.any?
    g.add
    g.commit('Updated grade report')
    g.push(branch: g.current_branch)
  else
    $stderr.puts "No changes"
  end
rescue Git::GitExecuteError => e
  puts "Problem updating repo"
  puts "error: #{e.message}"
end

I run this program after modifying a file in an existing, previously cloned git repo. When I do, it fails with this error:

Problem updating repo
error: git '--git-dir=testGitRepo' '-c' 'core.quotePath=true' '-c' 'color.ui=false' push '{:branch=>"main"}' 'master'  2>&1:error: src refspec master does not match any
error: failed to push some refs to '{:branch=>"main"}'

I suspect the important part of this error message is push '{:branch=>"main"}' 'master'

The fact that master still appears suggests that I need to do something else to tell the push command that I want to push the local main to origin main; but, I don't see how to do that.

The docs for push say this:

pushes changes to a remote repository - easiest if this is a cloned repository, otherwise you may have to run something like this first to setup the push parameters:

@git.config('remote.remote-name.push', 'refs/heads/master:refs/heads/master')

But I don't see how to call config in a way that sets the upstream branch to main. (I tried g.config('remote.remote-name.push', 'refs/heads/main:refs/heads/main') and it appeared to have no effect. Of course, I don't fully understand what this command is supposed to do.)

CodePudding user response：

push takes the remote and branch names as separate arguments:

#push(remote = 'origin', branch = 'master', opts = {})

https://rubydoc.info/gems/git/Git/Base#push-instance_method

Using the following should work:

g.push('origin', 'main')