Class: Manman::Worker

Inherits:
Object
  • Object
show all
Defined in:
lib/manman/worker.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(logger = nil, opts = nil) ⇒ Worker

Returns a new instance of Worker.



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# File 'lib/manman/worker.rb', line 5

def initialize( logger=nil, opts=nil )
  if logger.nil?    
    @logger = Logger.new(STDOUT)
    @logger.level = Logger::INFO
  else
    @logger = logger
  end

  if opts.nil?
    @opts    = Opts.new
  else
    @opts = opts
  end
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/manman/worker.rb', line 20

def logger
  @logger
end

#opts ⇒ Object (readonly)

Returns the value of attribute opts.



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# File 'lib/manman/worker.rb', line 20

def opts
  @opts
end

Instance Method Details

#calc_digest_md5(fn) ⇒ Object 



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# File 'lib/manman/worker.rb', line 174

def calc_digest_md5( fn )
  # digest/hash is a string of 20 hexadecimal 8-bit numbers
  # example:
  #   5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8

  ## NB: use b - binary
  #  required for Windows-only (avoids changing of newlines \n to \n\r or similar)

  md5 = Digest::MD5.hexdigest( File.open( fn, 'rb') { |f| f.read } )
  md5
end

#encrypt_callback(text) ⇒ Object 



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# File 'lib/manman/worker.rb', line 143

def encrypt_callback( text )
  if opts.encrypt_callback.nil?    
    puts "[debug] no encrypt callback configured"
    text   # pass through; identity; do nothing
  else
    opts.encrypt_callback.encrypt_callback( text )
  end
end

#filter_callback(text) ⇒ Object 



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# File 'lib/manman/worker.rb', line 152

def filter_callback( text )
  if opts.filter_callback.nil?
    puts "[debug] no filter callback configured"     
    text
  else
    opts.filter_callback.filter_callback( text )
  end
end

#generate_checksum(text) ⇒ Object 



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# File 'lib/manman/worker.rb', line 161

def generate_checksum( text )

  # NB: remove possible old checksum in checksum line w/ empty line before md5 calculation
  hash = Digest::MD5.hexdigest( text.gsub( /^CHECKSUM:.*/, '' ) )
  puts "Paket-Hash >#{hash}<"
  encrypted_hash = encrypt_callback( hash )

  ## use strip why? why not?
  ##  was encrypted_hash.strip
 
  text.gsub( /^CHECKSUM:.*/, "CHECKSUM: #{encrypted_hash}" )
end

#generate_manifest ⇒ Object 



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# File 'lib/manman/worker.rb', line 33

def generate_manifest

  puts "  working folder is: #{Dir.pwd}"
  
  puts "Loading template #{opts.template}..."
  
  old_lines = File.read( opts.template )

  new_lines = []

  header_lines = []

  
  ### todo/fix: move to template  ???
  header_lines << "####################################################\n"
  header_lines << "# generated on  #{Time.now} using  #{Manman.banner}\n"
  header_lines << "# - version: #{opts.release}, env: #{opts.env}\n"

  old_lines.each_line do |line|

    if line =~ /^\s*#/
      # skip komments and do NOT copy to result (keep comments secret!)
      logger.debug 'skipping comment line'
      next
    end
      
    if line =~ /^\s*$/ 
      # kommentar oder leerzeile überspringen 
      logger.debug 'skipping blank line'
      new_lines << line
      next
    end

    # split/process key value pair

    tokens = line.split( ':' )

    key    = tokens[0]
    values = tokens[1]

    ## special keys (NOT files; do NOT calculate md5 digest)
   
    headers_release  = [ 'RELEASE', 'VERSION' ]
    headers_env      = [ 'ENV', 'UMGEBUNG' ]
    headers_valid    = [ 'VALID_UNTIL', 'GUELTIG_BIS' ]
    headers_checksum = [ 'CHECKSUM' ]
   
    headers = headers_release + headers_env + headers_valid + headers_checksum
    headers += opts.headers   # add possible user defined extra headers
   
    if headers.include?( key )
      if headers_release.include?( key )
        new_lines << "#{key}: #{opts.release}\n"
      elsif headers_env.include?( key )
        new_lines << "#{key}: #{opts.env}\n"
      elsif headers_valid.include?( key )
        new_lines << "#{key}: #{opts.valid}\n"
      else    # assume extra headers or checksum
        new_lines << line     ## just pass header line throug; not modified
      end
      next
    end

    ### calculate md5 digests
    
    md5 = ""  
    fn = "#{opts.base}/#{key}"   # filename
    
    if File.exists?( fn ) == false
      md5 = "xxxxxxx"
      msg = "*** ERROR: #{key} missing; using path #{fn}"
      puts msg
      header_lines << "#  #{msg}\n"     # add error to header in manifest
    else
      md5 = calc_digest_md5( fn )
      puts "OK #{key} -> #{md5}"
    end
    
    new_lines << "#{key}: #{md5}, #{values}"
           
  end # oldlines.each


  header_lines << "#####################################\n"
  header_lines << "\n"

  new_lines = header_lines + new_lines

  # lines all in one string (no array/ary of lines)
  new_lines_all_in_one = ""
  new_lines.each do |line|
    new_lines_all_in_one << line
  end

  puts "[debug] new_lines_all_in_one:"
  puts new_lines_all_in_one
  
  ## allow custom filter (lets you add custom headers,checksums,etc.)
  new_lines_all_in_one = filter_callback( new_lines_all_in_one )

  ## last step - calculate checksum
  new_lines_all_in_one = generate_checksum( new_lines_all_in_one )
  
  File.open( opts.output, 'w') do |f|
    f.write( new_lines_all_in_one )
  end
  
end

#run ⇒ Object 



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# File 'lib/manman/worker.rb', line 23

def run
  puts "Using settings:"
  pp opts
  
  generate_manifest()
  
  puts 'Done.'
end