Bash function to open a GitHub pull request from the command line

gpr.sh

# in a git repo, compare your branch to another branch on github.com
# and optionally create a pull request

function gpr {
  local repo
  local branch
  local title

  repo=$(git ls-remote --get-url 2>/dev/null)
  branch=$(git branch --no-color --contains HEAD 2>/dev/null | awk '{ print $2 }')
  title=$(git log -1 --pretty=%B | tr -d '\n')

  if [[ $repo == *"git@github.com"* ]]; then
    repo=${repo/git@github.com:/https:\/\/github.com/}
    repo=${repo/.git/}
  fi

  if [ -n "${repo}" ] && [ -n "${branch}" ]; then
    local url="${repo}/compare/${branch}?expand=1&title=${title}"
    echo "${url}" | pbcopy
    open "${url}"
  else
    echo "Not in a git repository."
  fi
}