DirChecksum - Recursively checksum a directory

Overview

This class builds a checksum file of all files inside a given directory and then provides functions for comparing that directory against the checksum file for modifications. Three implementations are available, one based on md5, one based on sha1, and one based on file mtime.

Installation

gem install dir_checksum

Git Repository

github.com/ePublishing/dir_checksum

Usage

# Process checksum with a block (defaults to SHA1)
DirChecksum.recursive_checksum('/a/directory') do |file, checksum|
  puts "#{file}: #{checksum}"
end

# Writes result of checksum to file in root of directory
DirChecksum::MD5.write_to_file!('/some/absolute/directory')

# Write result of checksum to (optional) output checksum file
DirChecksum::SHA1.write_to_file!('some/relative/directory', 'checksum_output.txt')

# If a checksum file exists (optionally pass in location), examine it
# and compare those results with current directory to determine differences
DirChecksum::Timestamp.warn_if_has_checksum_file_and_diff!('/a/directory')