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# File 'lib/snapback/options.rb', line 5
def self.parse(args)
options = {}
options[:command] = nil
options[:database] = nil
options[:config] = "#{File.expand_path('~')}/.snapback.yml"
options[:verbose] = false
options[:size] = nil
opts = OptionParser.new do |opts|
opts.banner = "Usage: sudo #{$0} [command] [options]"
opts.separator "Create database snapshots using logical volume management (LVM)"
opts.separator ""
opts.separator "Commands:"
opts.separator " install".ljust(37) + "Check the environment is sane and setup"
opts.separator " create DBNAME -s SIZE".ljust(37) + "Create a new snapback compliant database"
opts.separator " snapshot DBNAME -s SIZE".ljust(37) + "Take a snapshot of the current position"
opts.separator " commit DBNAME".ljust(37) + "Commit the working copy"
opts.separator " rollback DBNAME".ljust(37) + "Rollback the working copy to the snapshot"
opts.separator " drop DBNAME".ljust(37) + "Drop an existing database"
opts.separator " mount DBNAME".ljust(37) + "Mount an existing database"
opts.separator " unmount DBNAME".ljust(37) + "Unmount an existing database"
opts.separator ""
opts.separator "Options:"
opts.on("-s", "--size SIZE",
"Allocate a size parameter (e.g.: 1M, 1G, 1T)") do |q|
options[:size] = q
end
opts.on("-v", "--verbose",
"Show detailed transaction information") do
options[:verbose] = true
end
opts.on("-h", "--help",
"Show this help screen") do
puts opts
exit
end
opts.on("-c", "--config",
"Configuration file") do |q|
options[:config] = q
end
opts.separator ""
end
opts.parse!(args)
case args[0]
when "install", "create", "snapshot", "commit", "rollback", "drop", "mount", "unmount"
options[:command] = args[0]
when nil
puts opts
exit
else
$stderr.puts "command '#{args[0]}' not recognised"
puts opts
exit
end
case options[:command]
when "create", "snapshot", "commit", "rollback", "drop", "mount", "unmount"
if args[1].nil? then
$stderr.puts "you must specify a database with command '#{options[:command]}'"
puts opts
exit
end
options[:database] = args[1]
end
options
end
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