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 65

def initialize(config_str=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']

	if home
	  config_files << File.expand_path( File.join( '~', '.amazonrc' ) )
	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 )

 # 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

 self[key] = val

	  end
	end

  end

end