Run a shell script with bash, line-by-line, prompted on each command. Useful for running unknown scripts or debugging. Not a secure substitute for understanding a script beforehand.

bash_untrusted.sh

#!/bin/bash

# Just so we can skip the first command - running the first argument
SKIP=true

function prompt {
  if [[ "$SKIP" == true ]]; then
    SKIP=false
    return
  fi

  if [[ -n "$BASH_COMMAND" ]]; then
    # Show the command in green with a simple -> prompt
    echo -n -e "-> \x1B[0;32m"
    echo -n $BASH_COMMAND
    echo -e "\x1B[0m"

    # Loop user input until a valid answer comes
    while true; do
      # Ask for only a single character of input, so the user does not need to type an extra enter
      read -n1 -s -p "Run command? [Y/n] "
      echo

      case "$REPLY" in
        "y" | "Y" | "" )
          break
          ;;
        "n" | "N" )
          # Bright red indication that that script stopped
          echo -e "\x1B[1;31mStopped!\x1B[0m"
          exit 1
          ;;
        * )
          echo "Please answer by typing n (for no), y (for yes), or Enter (also for yes)"
          ;;
      esac
    done
  fi
}

# Allow debugging in the file that is being source'd
set -o functrace
# Run the prompt function before each command
trap prompt DEBUG

# Run the first argument
source "$1"

LICENSE

MIT License

Copyright (c) 2021 Daniel Ethridge

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

^ :3 lol'd