Try and guess where to push branches to based on convention.

po.sh

#!/bin/bash

# This script tries to handle `git push` when the local branch isn't
# configured to track a remote branch.
#
# First, if the branch already tracks a remote branch then it just calls
# `git push` and we're done.
#
# Second, if the branch doesn't track a remote branch and there is a
# remote called "origin" present then it just makes an assumption and
# pushes it there.
#
# Lastly, it gives up and spits out a nice error message telling you
# what you need to do.

FULL_REF_NAME=$(git for-each-ref --format='%(upstream:short)' $(git symbolic-ref -q HEAD))
CURRENT_BRANCH_NAME=$(git symbolic-ref --short HEAD)

if [[ -n $FULL_REF_NAME ]]; then
  # We're already tracking a remote branch, so just push it.
  exec git push $@
else
  # Check to see if there is an "origin" remote.
  if [[ $(git remote | grep -c '^origin$') == "1" ]]; then
    echo "Warning: this branch doesn't track origin. Pushing there."
    exec git push --set-upstream origin $CURRENT_BRANCH_NAME $@

  else
    echo "Warning: this branch doesn't track a remote branch"
    echo "         additionally there is no 'origin' remote."

    if [[ $(git remote | wc -l) -gt 0 ]]; then
      echo
      echo "Currently configured remotes are:"
      git remote -v
    else
      echo "         you'll need to add one manually."
    fi
    
    exit 1
  fi
fi