#!/bin/sh
set -eu

# Update the default branch without checking out that branch (unless we're
# already on the default branch, then just run git Pull. Accepts 1 parameter,
# the remote name (defaults to origin).

default_branch="$(git default-branch)"
current_branch="$(git branch --show-current)"
remote="${1:-origin}"

if [ "$default_branch" = "$current_branch" ]
then
    git Pull
else
    git fetch --progress --tags "$remote" "$default_branch:$default_branch"
fi