Git "Prepare Before" Snippet

gitprepare.sh

#!/usr/bin/env bash

# inspired by https://github.com/heroku/cli/blob/master/scripts/publish-release

CURRENT_BRANCH=`git rev-parse --abbrev-ref HEAD`
MAIN_BRANCH="master"

if [[ "${CURRENT_BRANCH}" != "${MAIN_BRANCH}" ]]; then
  echo "This script must be run on the ${MAIN_BRANCH}."
  echo "Please checkout the ${MAIN_BRANCH} branch with:"
  echo "git checkout ${MAIN_BRANCH}"
  exit 1
fi

if ! (command -v gh > /dev/null); then
  echo "GitHub CLI is required for this release script."
  echo "Please install GitHub CLI and try again:"
  echo "https://github.com/cli/cli#installation"
  exit 1
fi

# hostname is necessary just in case you are logged into the CLI
# GitHub enterprise instance
if ! (gh auth status --hostname "github.com" > /dev/null 2>&1); then
  echo "Not logged into github".
  echo "Please run: gh auth login"
  exit 1
fi

git pull --rebase origin "${MAIN_BRANCH}"
# The --force overrides local tags.
# This is needed if you've published previously,
# otherwise git will exit with an error unnecessarily.
git fetch origin  --force --tags