Split a text file into a directory of files each of which contains 1 line from the original file

split_file.bash

#!/usr/bin/env bash

# Ensure a file name is provided
if [ -z "$1" ]
then
      echo "No file name provided. Usage: ./split_file.bash <filename>"
      exit 1
fi

# Extract the directory and base name from the file
dir_name=$(dirname "$1")
base_name=$(basename "$1")
file_name="${base_name%.*}"

# Create directory to store the split files
mkdir -p "$dir_name/$file_name"

# Read the file line by line
while IFS= read -r line
do
  # Hash the line with sha256 and use it as the file name
  file_hash=$(echo -n "$line" | cksum | awk '{print $1}')
  
  # Write the line to the new file
  echo "$line" > "$dir_name/$file_name/$file_hash.txt"
done < "$1"