Take a selection of branches, merge them all together, and force-push them to a remote repo

git-deploy.sh

#!/bin/bash

set -e

current_branch="$(git symbolic-ref HEAD 2>/dev/null)"
short_current_branch=${current_branch#refs/heads/}
date=$(date --iso-8601 --date="-1 month")

options=()

while IFS= read -r entry
do
    eval $entry
    shortref=${ref#refs/heads/}
    refmod=$(git log -n 1 $shortref --date=short --format="%cd")
    state="on"
    if [[ $refmod < $date ]]
    then
        state="off"
    fi
    options+=($shortref "$refmod" $state)
    echo ${options[@]}
done < <(git for-each-ref --sort=-committerdate --shell --format="ref=%(refname)" refs/heads)

echo ${options[@]}

cmd=(dialog --separate-output --checklist "Select options:" 22 76 16)

echo "${cmd[@]}" "${options[@]}" 2>&1 >/dev/tty
choices=$("${cmd[@]}" "${options[@]}" 2>&1 >/dev/tty)
clear

temporary_branch="deploy-$(date +%Y%m%dT%H%M)-$(openssl rand -hex 2)"
git checkout -b $temporary_branch origin/master
git merge --no-ff -m "Combine for deploy" -m "${choices}" ${choices}
git push --force origin ${temporary_branch}:bryan
git checkout $short_current_branch
git branch -D $temporary_branch