#!/usr/bin/env bash
#
# Optimized script to remove directories from PATH.
# For each specified directory, all occurrences are removed from PATH.
#
# Usage: x-path-remove <directory1> [<directory2> ...]
#
# Enable verbose output by setting the environment variable VERBOSE=1.
#
# Author: Ismo Vuorinen <https://github.com/ivuorinen> 2024
# License: MIT

VERBOSE="${VERBOSE:-0}"

# Ensure that at least one directory is provided.
[ "$#" -lt 1 ] && {
  echo "Usage: $0 <directory> [<directory> ...]"
  exit 1
}

for dir in "$@"; do
  # Remove trailing slash if present, unless the directory is "/"
  [ "$dir" != "/" ] && dir="${dir%/}"

  # Check if the directory is present in PATH.
  case ":$PATH:" in
    *":$dir:"*)
      # Remove all occurrences of the directory from PATH using parameter expansion.
      PATH=":${PATH}:"
      PATH="${PATH//:$dir:/:}"
      PATH="${PATH#:}"
      PATH="${PATH%:}"
      [ "$VERBOSE" -eq 1 ] && echo "Removed '$dir' from PATH."
      ;;
    *)
      [ "$VERBOSE" -eq 1 ] && echo "(?) '$dir' is not in PATH."
      ;;
  esac
done

export PATH