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Contents
module Beaker
module Options
#A set of functions to parse hosts files
module HostsFileParser
# Read the contents of the hosts.cfg into an OptionsHash, merge the 'CONFIG' section into the OptionsHash, return OptionsHash
# @param [String] hosts_file_path The path to the hosts file
#
# @example
# hosts_hash = HostsFileParser.parse_hosts_file('sample.cfg')
# hosts_hash == {:HOSTS=>{:"pe-ubuntu-lucid"=>{:roles=>["agent", "dashboard", "database", "master"], ... }
#
# @return [OptionsHash] The contents of the hosts file as an OptionsHash
# @raise [ArgumentError] Raises if hosts_file_path is not a path to a file, or is not a valid YAML file
def self.parse_hosts_file(hosts_file_path = nil)
host_options = Beaker::Options::OptionsHash.new
host_options['HOSTS'] ||= {}
unless hosts_file_path
return host_options
end
hosts_file_path = File.expand_path(hosts_file_path)
unless File.exists?(hosts_file_path)
raise ArgumentError, "Host file '#{hosts_file_path}' does not exist!"
end
begin
host_options = host_options.merge(YAML.load_file(hosts_file_path))
rescue Psych::SyntaxError => e
raise ArgumentError, "#{hosts_file_path} is not a valid YAML file\n\t#{e}"
end
# Make sure the roles array is present for all hosts
host_options['HOSTS'].each_key do |host|
host_options['HOSTS'][host]['roles'] ||= []
end
if host_options.has_key?('CONFIG')
host_options = host_options.merge(host_options.delete('CONFIG'))
end
host_options
end
end
end
end
Version data entries
71 entries across 71 versions & 1 rubygems