touchx

#!/usr/bin/env bash

set -euo pipefail

SCRIPT_NAME=$(basename "$0")

usage() {
	local exit_code=${1:-0}
	cat <<EOF
Usage: $SCRIPT_NAME [OPTIONS] <file> [<file> ...]

Create or update the specified file(s) and make them executable.

Arguments:
  <file> [<file> ...]  One or more files to create or update.

Options:
  -h, --help          Show this help message and exit.

If a specified file does not exist, it will be created.
If it exists, its timestamp will be updated.
All specified files will be given executable permissions.

Examples:
  $SCRIPT_NAME script.sh
  $SCRIPT_NAME file1.sh file2.sh
EOF
	exit "$exit_code"
}

# Check if no arguments were provided
if [ "$#" -lt 1 ]; then
	usage 1
fi

# Collect file arguments
files=()

# Parse options and collect valid file arguments
while [[ $# -gt 0 ]]; do
	case "$1" in
	-h | --help)
		usage
		;;
	-*)
		echo "Error: Unknown option '$1'" >&2
		usage 1
		;;
	*)
		files+=("$1")
		;;
	esac
	shift
done

# Ensure at least one valid file argument remains
if [ "${#files[@]}" -eq 0 ]; then
	echo "Error: No files specified." >&2
	usage 1
fi

# Process each file argument
for file in "${files[@]}"; do
	# Ensure the file argument is not empty
	if [[ -z $file || $file =~ ^[[:space:]]+$ ]]; then
		echo "Error: Invalid filename '$file'." >&2
		exit 1
	fi

	# Create or update the file
	if ! touch "$file"; then
		echo "Error: Failed to create or update '$file'." >&2
		exit 1
	fi

	# Make the file executable
	if ! chmod +x "$file"; then
		echo "Error: Failed to set execute permission for '$file'." >&2
		exit 1
	fi

	echo "Created and made executable: '$file'"
done