Class: Amazon::Config

Inherits:
Hash
  • Object
show all
Defined in:
lib/amazon.rb

Overview

A Class for dealing with configuration files, such as /etc/amazonrc and ~/.amazonrc.

Defined Under Namespace

Classes: ConfigError

Instance Method Summary collapse

Constructor Details

#initialize(config_str = nil) ⇒ Config

A configuration may be passed in as a string. Otherwise, the files /etc/amazonrc and ~/.amazonrc are read if they exist and are readable.



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# File 'lib/amazon.rb', line 69

def initialize(config_str=nil)
  locale = nil

  if config_str

  # We have been passed a config file as a string.
  #
    config_files = [ config_str ]
  config_class = StringIO

  else

  # Perform the usual search for the system and user config files.
  #
  config_files = [ File.join( '', 'etc', 'amazonrc' ) ]

  # Figure out where home is. The locations after HOME are for Windows.
  # [ruby-core:12347]
  #
  home = ENV['AMAZONRCDIR'] ||
    ENV['HOME'] || ENV['HOMEDRIVE'] + ENV['HOMEPATH'] ||
    ENV['USERPROFILE']
  user_rcfile = ENV['AMAZONRCFILE'] || '.amazonrc'

  if home
    config_files << File.expand_path( File.join( home, user_rcfile ) )
  end

  config_class = File
  end

  config_files.each do |cf|

  if config_class == StringIO
    readable = true
  else
    # We must determine whether the file is readable.
    #
    readable = File.exists?( cf ) && File.readable?( cf )
  end

  if readable

    Amazon.dprintf( 'Opening %s ...', cf ) if config_class == File

    config_class.open( cf ) { |f| lines = f.readlines }.each do |line|
 line.chomp!

 # Skip comments and blank lines.
 #
 next if line =~ /^(#|$)/

 Amazon.dprintf( 'Read: %s', line )

 # Determine whether we're entering the subsection of a new locale.
 #
 if match = line.match( /^\[(\w+)\]$/ )
   locale = match[1]
   Amazon.dprintf( "Config locale is now '%s'.", locale )
   next
 end

 # Store these, because we'll probably find a use for these later.
 #
 begin
          match = line.match( /^\s*(\S+)\s*=\s*(['"]?)([^'"]+)(['"]?)/ )
   key, begin_quote, val, end_quote = match[1, 4]
   raise ConfigError if begin_quote != end_quote

 rescue NoMethodError, ConfigError
   raise ConfigError, "bad config line: #{line}"
 end

 if locale && locale != 'global'
   self[locale] ||= {}
   self[locale][key] = val
 else
   self[key] = val
 end

    end
  end

  end

end