backup.sh

#!/bin/bash

set -eo pipefail
cd ${0%/*}

if [[ -z "$1" ]]; then
  echo "usage: $0 <orgname>"
  exit 1
fi
ORG="$1"

echo "backup github.com/$ORG"

W=$(mktemp -d -p $PWD)
function cleanup {
  echo "cleaning up"
  rm -fr $W
}
trap cleanup EXIT

echo "created workdir $W"

function repo_names {
  local org="$1"
  curl -s "https://api.github.com/orgs/$org/repos?per_page=200" | \
    jq -r '.[].name'
}

for repo in $(repo_names $ORG); do
  echo "back up github.com/$ORG/$repo"
  git clone https://github.com/$ORG/${repo}.git $W/backup/$repo
done

BACKUP="backup-$(date +%Y%m%d%H%M%S).tar.gz"

tar -czf ${BACKUP} -C $W ./backup
echo "created backup: $BACKUP"