little script to debug node module resolution

find-up-module.bash

#!/usr/bin/env bash

if [ -z "$1" ]; then
  echo 'first arg should be module to search up for'
  exit 1
fi

BLUE=$(tput setaf 4)
GREEN=$(tput setaf 2)
RED=$(tput setaf 1)
NORMAL=$(tput sgr0)

blue () {
  printf "${BLUE}%-12s${NORMAL}%s\n" "$1" "$2"
}
red () {
  printf "${RED}%-12s${NORMAL}%s\n" "$1" "$2"
}
green () {
  printf "${GREEN}%-12s${NORMAL}%s\n" "$1" "$2"
}

# Ensure we're matching node's realpath behavior
blue "realpath" "switching to the real path of current dir:"
blue "realpath" "  $PWD"
blue "realpath" "  ↓"
blue "realpath" "  $(realpath .)"
cd $(realpath .)

blue "info" "performing a 'find-up' for 'node_modules'"
while [ "$PWD" != "/" ]; do
  D="node_modules/$1"
  ABS_D="$PWD/$D"
  blue "info" "checking $ABS_D"
  if [[ -d "$D" || -L "$D" ]]; then
    green "success"  "module $1 found:"
    green "realpath" "  $ABS_D"
    green "realpath" "  ↓"
    green "realpath" "  $(realpath "$ABS_D")"
    green "version"  "  $(jq -r .version < "${ABS_D}/package.json")"
    exit 0
  fi

  blue "info" "going up a directory"
  cd ..
done

blue "info" "stopped because we reached /"

red "fail" "module not found"
exit 1