Check if branch is tracking branch before issuing push/pull during an 'update' operation

• Crispy Cookie version: 0.7.1
• Python version: 3.9
• Operating System: Mac

Description

Describe what you were trying to get done.
Tell us what happened, what went wrong, and what you expected to happen.

What I Did

Error output

Commiting....
[cookiecutter edc15b0] Update to cypress-cookiecutter@v1.10.0
 5 files changed, 18 insertions(+), 35 deletions(-)
git push
fatal: The current branch cookiecutter has no upstream branch.
To push the current branch and set the remote as upstream, use

    git push --set-upstream origin cookiecutter

To have this happen automatically for branches without a tracking
upstream, see 'push.autoSetupRemote' in 'git help config'.

Traceback (most recent call last):
  File "/Users/lalleman/.pyenv/versions/3.9.16/bin/crispy_cookie", line 8, in <module>
    sys.exit(main())
  File "/Users/lalleman/.pyenv/versions/3.9.16/lib/python3.9/site-packages/crispy_cookie/cli.py", line 629, in main
    return args.function(args)
  File "/Users/lalleman/.pyenv/versions/3.9.16/lib/python3.9/site-packages/crispy_cookie/cli.py", line 497, in do_update
    upgrade_project(tc, project_dir, args.branch, config_file, do_build, remote_ops=args.remote)
  File "/Users/lalleman/.pyenv/versions/3.9.16/lib/python3.9/site-packages/crispy_cookie/rebase.py", line 125, in upgrade_project
    run([GIT_BIN, "push"], check=True)
  File "/Users/lalleman/.pyenv/versions/3.9.16/lib/python3.9/subprocess.py", line 528, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['git', 'push']' returned non-zero exit status 128.

Possible command line to check to see if a branch is a remote tracking branch or not:

% git rev-parse --abbrev-ref cookiecutter@{upstream}; echo $? 
fatal: no upstream configured for branch 'cookiecutter'
128

If a remote tracking branch is added, then:

% git rev-parse --abbrev-ref cookiecutter@{upstream}; echo $?
origin/cookiecutter
0

Start in crispy_cookie/rebase.py at upgrade_project, where the update operation invokes git push, and review the reported git rev-parse upstream check. Reproduce the update with a branch lacking an upstream; done means the operation handles that case instead of issuing an unusable push or pull command.