Class: CouchReplicate::CommandLine

Inherits:
Object
  • Object
show all
Defined in:
lib/couch_replicate/command_line.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ CommandLine

Returns a new instance of CommandLine.



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# File 'lib/couch_replicate/command_line.rb', line 12

def initialize(args)
  parse_options(args)
end

Instance Attribute Details

#database ⇒ Object (readonly)

Returns the value of attribute database.



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# File 'lib/couch_replicate/command_line.rb', line 10

def database
  @database
end

#hosts ⇒ Object (readonly)

Returns the value of attribute hosts.



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# File 'lib/couch_replicate/command_line.rb', line 10

def hosts
  @hosts
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/couch_replicate/command_line.rb', line 10

def options
  @options
end

Class Method Details

.run(*args) ⇒ Object 



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# File 'lib/couch_replicate/command_line.rb', line 6

def self.run(*args)
  CommandLine.new(*args).run
end

Instance Method Details

#parse_options(args) ⇒ Object 



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# File 'lib/couch_replicate/command_line.rb', line 31

def parse_options(args)
 @options = { }

 options_parser = OptionParser.new do |opts|
   opts.banner = "Usage: couch-replicate db [OPTIONS] couchdb_host_01, couchdb_host_02[, couchdb_host_03...]"

   opts.separator ""

   opts.on("-l", "--link", "link the hosts in a circular list (this is the default if no other options are specified)") do
     @options[:link] = true
   end

   opts.on("-r", "--reverse", "link the hosts in a cicular list, reversing the order supplied") do
     @options[:reverse] = true
   end

   opts.on("-n", "-number [LINK_EVERY=3]", "link every n hosts") do |n|
     @options[:n] = n.to_i > 0 ? n.to_i : 3
   end

   opts.separator ""

   opts.on_tail("-v", "--version", "Show version") do
     puts File.basename($0) + " "  + CouchReplicate.version
     exit
   end

   # No argument, shows at tail.  This will print an options summary.
   # Try it and see!
   opts.on_tail("-h", "--help", "Show this message") do
     puts opts
     exit
   end
 end

 begin
   options_parser.parse!(args)
   @database = args.shift
   @hosts = args

   if @options[:n] && (@options[:n] == @hosts.length + 1)
     raise OptionParser::InvalidOption.new("The number of hosts cannot equal the replication shift.")
   end
 rescue OptionParser::InvalidOption => e
   raise e
 end
end

#run ⇒ Object 



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# File 'lib/couch_replicate/command_line.rb', line 16

def run
  if @options[:link] || @options.empty?
    $stderr.puts "Linking replication hosts..."
    CouchReplicate.link(@database, @hosts)
  end
  if @options[:reverse]
    $stderr.puts "Reverse linking replication hosts..."
    CouchReplicate.reverse_link(@database, @hosts)
  end
  if @options[:n]
    $stderr.puts "Linking every #{@options[:n]}th replication hosts..."
    CouchReplicate.nth(@options[:n], @database, @hosts)
  end
end