Convenient script for installing packages in the file system, and a counterpart back-up one as well. They can be stored in .local/bin

backup-packages.sh

#!/usr/bin/env bash

npm list --global --parseable --depth=0 | perl -lane 'if ( $_=~/node_modules\/(\S+)/ ) { print $1; }' >"$HOME/.config/npm.backup"
pip freeze >"$HOME/.config/requirements.backup"
cargo install --list | perl -lane 'if ( $_=~/^(\S+)/ ) {  print $1; }' >"$HOME/.config/cargo.backup"

install-packages.sh

#!/usr/bin/env bash

FILE=${1:-cargo}

function read_file_lines {
  local file_path="${HOME}/.config/${FILE}.txt"
  while IFS= read -r line; do
    echo "$line"
    eval "$PROGRAM $line"
  done <"$file_path"
}

case "$FILE" in
cargo)
  PROGRAM="cargo install"
  read_file_lines
  ;;
npm)
  PROGRAM="npm install -g"
  read_file_lines
  ;;
requirements)
  pip install --upgrade -r "$HOME/.config/${FILE}.txt"
  ;;
*)
  echo "Unknown file type. Choose cargo, npm or requirements"
  exit 1
  ;;
esac