Just a quick script to create a JSON of which key is the NPM package name and value is the array of all versions

list_all_versions_grouped_by_package.bash

#!/bin/bash
set -euo pipefail

PACKAGE="null"
packages_filepath="packages"
detailed_packages_filepath="detailed_packages"
username="shortlyster"
CLEANUP="false"

main() {
  if [[ "$CLEANUP" == "true" ]]; then
    cleanup
  fi

  if [[ ! -f $packages_filepath ]]; then
    echo "Fetching the list of all packages.."
    list_packages > $packages_filepath
  fi

  if [[ ! -f $detailed_packages_filepath ]]; then
    for package in $(cat $packages_filepath); do
      echo "Finding all version for $package.."
      PACKAGE="$package" list_versions_for_package >> $detailed_packages_filepath
    done
  fi

  # for versioned_package in $(cat $detailed_packages_filepath); do
  #   echo "Fetch tarball of $versioned_package.."
  #   npm pack $versioned_package
  # done
}

cleanup() {
  truncate -s 0 $packages_filepath
  truncate -s 0 $detailed_packages_filepath
}

list_packages() {
  curl -s -H "Authorization: Bearer $NPM_TOKEN" "https://registry.npmjs.org/-/user/$username/package" | jq -r "keys | .[]"
}

list_versions_for_package() {
  if [[ "$PACKAGE" == "null" ]]; then
    echo "Missing \$PACKAGE when invoking list_versions_for_package()"
    exit 0
  fi

  for version in $(curl -s -H "Authorization: Bearer $NPM_TOKEN" "https://registry.npmjs.org/$PACKAGE" | jq -r ".versions | keys | .[]"); do
    echo "$PACKAGE@$version" | sed "s/,//"
  done
}

main