Dockerhub fork commit hook

pre-commit.bash

#!/bin/bash
list=$(curl -s https://hub.docker.com/v2/repositories/library/node/tags/?page_size=500 | jq -r '.results|.[]|.name' | grep -v onbuild | grep -v latest | 
sort)
branch=$(git rev-parse --abbrev-ref HEAD)
create_branch() {
  tag=$1
  branch=$2
  if git rev-parse --verify ${tag} > /dev/null
  then
    echo "branch ${tag} exists"
  else
    git checkout "${branch}" > /dev/null
    git checkout -B ${tag}
    sed -i "" "s/FROM node/FROM node:${tag}/g" Dockerfile
    git commit --no-verify -am 'update tag'
  fi
}
export -f create_branch
echo $list | xargs -P 1 -n 1 -I {} bash -c 'create_branch "$@"' _ {} "${branch}"
git checkout "${branch}"