Bash script to find folder paths of installed node packages by name

find_packages.sh

#!/bin/sh

# finds node packages installed in a given directory
# - takes a directory path and one or more package names
# - finds all package.json files in the directory that have a matching name
# - returns the paths to the package folders
#
# Usage example:
#
# $ find_installed_packages.sh ./project/.cache/ foo foo-utils
# ./project/.cache/module__3a7ad8f32129c4035c57e71c60b41b74cb025412a55914eb5fcc42a24ff66cde
# ./project/.cache/module__3a7ad8f32129c4035c57e71c60b41b74cb025412a55914eb5fcc42a24ff66cde/node_production_modules/foo-utils
#

target_dir="$1"
shift
package_names=("$@")

if [ -z $target_dir ]; then
  echo "No target folder provided"
  exit
fi

if [ ! -d $target_dir ]; then
  echo "Target folder does not exist"
  exit
fi

if [ "${#package_names[@]}" == "0" ]; then
  echo "No package names provided"
  exit
fi

for package_name in ${package_names[@]}; do
  find $target_dir \
  -name package.json \
  -type f \
  | xargs grep "\"name\": \"$package_name\"" \
  | xargs dirname {} \
  | grep $target_dir
done