watch

#!/bin/bash

# Simple script to monitor a directory for changes (new, modified, or deleted files)

# Usage: ./script.sh <glob_pattern>

if [ $# -eq 0 ]; then
    echo "Usage: $0 <glob_pattern>"
    exit 1
fi

glob_pattern="$1"

# Record the start time
start_time=$(date +%s)

# Get the initial list of files
initial_files=($(find "$glob_pattern" -type f))

while true; do
    # Find new or modified files (modified after the start time)
    new_or_modified_files=($(find "$glob_pattern" -type f -newermt "@$start_time"))

    # Get the current list of files
    current_files=($(find "$glob_pattern" -type f))

    # Find deleted files (present in initial_files but not in current_files)
    deleted_files=()
    for file in "${initial_files[@]}"; do
        if [[ ! " ${current_files[*]} " =~ " ${file} " ]]; then
            deleted_files+=("$file")
        fi
    done

    # If there are any changes, print the filenames and exit
    if [ "${#deleted_files[@]}" -gt 0 ] || [ "${#new_or_modified_files[@]}" -gt 0 ]; then
        for file in "${deleted_files[@]}"; do
            echo "$file" 
        done
        for file in "${new_or_modified_files[@]}"; do
            echo "$file" 
        done
        break
    fi

    sleep 1
done