Module: Bloggit::Checksum

Defined in:
lib/bloggit/checksum.rb

Class Method Summary collapse

Class Method Details

.diff(source = {}, target = {}) ⇒ Object

returns [files_to_upload, files_to_delete]



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# File 'lib/bloggit/checksum.rb', line 8

def diff(source={}, target={})
  # look for differences...
  src_files = source.fetch('files', {})
  tgt_files = target.fetch('files', {})
  to_update = []; to_delete = []; to_upload = []

  tgt_files.each do |filename, checksum|
    if src_files.has_key? filename
      to_update << filename unless src_files[filename] == checksum
    else
      to_delete << filename
    end
  end

  to_upload = src_files.keys - tgt_files.keys

  # returns [files_to_upload, files_to_delete]
  [[to_upload, to_update].flatten, to_delete]
end

.generate_from(cache_dir) ⇒ Object

Create the checksums…



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# File 'lib/bloggit/checksum.rb', line 29

def generate_from(cache_dir)
  checksums = { 'generated_on'=>Time.now, 'files'=>{} }
  Find.find( cache_dir ) do |f|
    next if File.directory?( f )
    checksums['files'][f.gsub("#{cache_dir}/", '')] = Digest::MD5.hexdigest( File.read(f) )
  end
  checksums
end