npm-save-modules

npm-save-modules.sh

#!/bin/bash


if [[ -z "$1" ]]; then
  echo ERROR: no arguments passed!
  echo Usage: "$0 [save | restore]"
  exit 1
fi

if [[ ! -f ./package.json ]]; then
  echo ERROR: package.json not found!
  exit 2
fi

SHAREDIR="${HOME}/.local/share/npm-save-modules"
mkdir -p "$SHAREDIR"

SHASUM="$(shasum -a 256 ./package.json | egrep -o '^[0-9a-f]+')"
DESTDIR="${SHAREDIR}/${SHASUM}"

if [[ "$1" = "save" ]]; then
  if [[ ! -d ./node_modules ]]; then
    echo ERROR: node_modules not found!
    exit 3
  fi
  rsync -a node_modules "$DESTDIR"
  echo DONE!
elif [[ "$1" = "restore" ]]; then
  if [[ -d ./node_modules ]]; then
    echo ERROR: node_modules already exists!
    exit 4
  fi
  if [[ ! -d "$DESTDIR" ]]; then
    echo ERROR: saved modules not found for shasum: "$SHASUM"
    exit 5
  fi
  rsync -a "$DESTDIR/" .
  echo DONE!
else
  echo ERROR: option "$1" invalid!
  echo Usage: "$0 [save | restore]"
  exit 6
fi