Bash - pull all local git branches in current repo

git-sync

#!/usr/bin/env bash

# pull all local git branches in current repo
#  - stashes uncommitted changes
#  - switches to default branch and does pull/rebase
#  - switches to every other local branch and does pull/rebase
#  - switches back to original branch
#  - only works if in a git repo

set -e

die() { echo "$*" 1>&2 ; exit 1; }

if ! git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
    die "not in a git repo"
fi
echo
current_branch=$(git branch --show-current)
default_branch=$(git remote show origin | sed -n "/HEAD branch/s/.*: //p")
git stash --quiet
echo "switching to branch '${default_branch}'"
git checkout --quiet "${default_branch}"
echo "pulling '${default_branch}'"
git pull --rebase --stat
echo
branches=($(git branch --format="%(refname:short)"))
branches_without_default=(${branches[@]/${default_branch}})
for branch in "${branches_without_default[@]}"; do
    echo "switching to branch '${branch}'"
    git checkout --quiet "${branch}"
    echo "pulling '${branch}'"
    git pull --rebase --stat
    echo
done
git checkout --quiet "${current_branch}"
git stash pop --quiet 2>/dev/null || true