Class: DnsOne::Util

Inherits:
Object show all
Defined in:
lib/dns_one/util.rb

Constant Summary collapse

DOM_REGEX = 
/^[a-z0-9]+([\-\.][a-z0-9]+)*\.[a-z]{2,32}$/i

Class Method Summary collapse

Class Method Details

.const_underscore(name) ⇒ Object 



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# File 'lib/dns_one/util.rb', line 36

def const_underscore name
    name = name.to_s.dup
    name.gsub!('::', '/')
    name.gsub!(/([A-Z\d]+)([A-Z][a-z])/,'\1_\2')
    name.gsub!(/([a-z\d])([A-Z])/,'\1_\2')
    name.tr!("-", "_")
    name.downcase!
    name
end

.die(msg) ⇒ Object 



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# File 'lib/dns_one/util.rb', line 6

def die msg
  Global.logger.fatal msg
  exit 1
end

.ensure_sytemd ⇒ Object 



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# File 'lib/dns_one/util.rb', line 21

def ensure_sytemd
    unless has_systemd?
        STDERR.puts "Systemd not available. Aborting." 
        exit 1
    end
end

.has_systemd? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dns_one/util.rb', line 16

def has_systemd?
    File.exist?(`which systemctl`.strip) && 
    File.writable?('/lib/systemd/system')
end

.hash_to_ostruct_deep(hash) ⇒ Object 



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# File 'lib/dns_one/util.rb', line 46

def hash_to_ostruct_deep hash
    os = OpenStruct.new
    hash.each_pair{ |k, v| 
        if v.is_a? Hash
            os[k] = hash_to_ostruct_deep v
        else
            os[k] = v
        end
    }
    os
end

.init_logger(logdev, level = Logger::WARN, shift_age = 10, shift_size = 2**20) ⇒ Object 



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# File 'lib/dns_one/util.rb', line 58

def init_logger logdev, level = Logger::WARN, shift_age = 10, shift_size = 2**20
    if logdev.is_a? String
        begin
            if File.exists? logdev
                File.writable? logdev
            else
                FileUtils.mkdir_p File.dirname(logdev)
            end
        rescue => e
            $stderr.puts "#{e.desc}\nCannot open log file #{logdev}. Will use STDOUT."
            logdev = $stdout
        end
    end
    l = Logger.new logdev, shift_age, shift_size
    l.level = level
    l
end

.last_mod(constant) ⇒ Object 



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# File 'lib/dns_one/util.rb', line 32

def last_mod constant
  constant.to_s.split('::').last
end

.match_root(stat) ⇒ Object 



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# File 'lib/dns_one/util.rb', line 28

def match_root stat
    stat.uid == 0 && stat.gid == 0
end

.run(cmd) ⇒ Object 



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# File 'lib/dns_one/util.rb', line 11

def run cmd
    puts "Running #{cmd}..."
    system cmd
end