detect-and-install-npm-packages.sh

#!/bin/bash

PACKAGES=$(cat "${1:-/dev/stdin}" | \
  grep "require([\"'][^'\"]*.)" | \
  sed 's/^[^(]*(.//g' | \
  sed 's/.[\)]*[a-zA-Z;]*$//' | \
  sed "s/.[)].*$//" | \
  sort | uniq)

# Remove NodeJS built-ins
PACKAGES=$(echo $PACKAGES | \
  sed 's/^assert//' | \
  sed 's/^buffer//' | \
  sed 's/^child_process//' | \
  sed 's/^cluster//' | \
  sed 's/^console//' | \
  sed 's/^constants//' | \
  sed 's/^crypto//' | \
  sed 's/^dgram//' | \
  sed 's/^dns//' | \
  sed 's/^domain//' | \
  sed 's/^events//' | \
  sed 's/^fs//' | \
  sed 's/^http//' | \
  sed 's/^https//' | \
  sed 's/^module//' | \
  sed 's/^net//' | \
  sed 's/^os//' | \
  sed 's/^path//' | \
  sed 's/^punycode//' | \
  sed 's/^querystring//' | \
  sed 's/^readline//' | \
  sed 's/^repl//' | \
  sed 's/^stream//' | \
  sed 's/^string_decoder//' | \
  sed 's/^sys//' | \
  sed 's/^timers//' | \
  sed 's/^tls//' | \
  sed 's/^tty//' | \
  sed 's/^url//' | \
  sed 's/^util//' | \
  sed 's/^vm//' | \
  sed 's/^zlib//')

echo "$PACKAGES" | xargs -n1 echo 'npm install'