Checkout/Pull all repos of a Github organization

pullall.sh

#!/bin/bash
set -o errexit -o pipefail
org=dcos-terraform
parallel=10

function main {
  local num_repos=-1
  local page=1
  local i
  local x
  local y
  declare -a repos
  echo "Fetching list of repos in Github organization $org"
  until [ $num_repos -eq 0 ]; do
    fetched_repos=($(curl "https://api.github.com/orgs/$org/repos?per_page=100&page=$page" 2>/dev/null | jq -r .[].name))
    num_repos=${#fetched_repos[@]}
    repos+=( "${fetched_repos[@]}" )
    let page++
  done
  echo "Found a total of ${#repos[@]} repos"
  for (( x=0; x<$((${#repos[@]}/$parallel)); x++ )); do
    for (( y=0; y<$parallel; y++ )); do
      i=$(($x*$parallel+$y))
      checkout "${repos[$i]}" &
    done
    wait
  done
  for (( x=0; x<$((${#repos[@]}%$parallel)); x++ )); do
    let i++
    checkout "${repos[$i]}" &
  done
  wait
}

function checkout {
  local repo=$1
  echo "Pulling or cloning $repo"
  if [ -d $repo ]; then
    cd "$repo"
    git checkout master
    git pull
    cd ..
  else
    git clone "git@github.com:$org/$repo.git"
  fi
}

main