Git: Check out automatically named new branch for selected Jira ticket

.functions.sh

# Get branch name based on Jira ticket details.
# Output format: $type/$name-$id
#
# - Name is the kebab cased ticket summary,
#   excluding special chars and details in braces.
# - Type is determined by the ticket‘s issuetype unless specified by
#   the optional second argument (e.g. chore, new, upgrade).
#
# Requires https://github.com/go-jira/jira
#
# Example usage:
#   jira-branch-name JIRA-869
#   jira-branch-name https://example.atlassian.net/browse/JIRA-869
#   jira-branch-name https://example.atlassian.net/browse/JIRA-615 new
function jira-branch-name() {
  local id=$(echo $1 | xargs basename)
  local details=$(jira view $id)
  local name=$(echo "$details" | grep summary | sed -e 's/summary://' -e 's/([^()]*)//g' | tr -dc '[:alnum:][:blank:]' | tr '[:upper:]' '[:lower:]' | xargs basename | paste -sd '-' -)
  if [ -n "$2" ]; then
    local type=$2
  else
    local issuetype=$(echo "$details" | grep issuetype | sed 's/issuetype://' | xargs)
    case $issuetype in
      Bug) local type="fix";;
      *) local type="update";;
    esac
  fi
  echo "$type/$name-$id"
}

# Select a Jira ticket and switch to an automatically named new Git branch.
# Optional: Define the branch name‘s type with an argument, e.g. `jb new`.
function jb() {
  local id=$(jira ls -q 'status in (Open, "Ready for Dev", "In Progress") AND assignee in (currentUser()) ORDER BY priority DESC' | fzf | cut -d: -f1)
  [ -n "$id" ] && git checkout -b $(jira-branch-name $id $1)
}