Class: NOMS::Optconfig

Inherits:
Hash show all
Defined in:
lib/noms/optconfig.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Hash

#to_bashon

Methods included from BashOn

#name_key

Constructor Details

#initialize(domain, submitted_optspec, version = nil) ⇒ Optconfig

Returns a new instance of Optconfig.



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# File 'lib/noms/optconfig.rb', line 61

def initialize(domain, submitted_optspec, version=nil)
   @domain = domain
   @optspec = add_standard_opts(submitted_optspec)
    @caller_version = version || $VERSION || 'Unknown version'

   submitted_optspec.each_pair do |optspec, val|
      opt, dummy = optspec.split(/[\=\+\!]/, 2)
      self[opt] = val
   end

    cfgfilepath = [ '/usr/local/etc/' + domain + '.conf',
        '/etc/' + domain + '.conf' ]

   if ENV.has_key? 'HOME' and ! ENV['HOME'].nil?
      cfgfilepath.unshift(ENV['HOME'] + '/.' + domain)
   end
   @config = nil

    cmdlineopt = Longopt.new(optspec.keys)

   if cmdlineopt.has_key? 'config'
      @config = cmdlineopt['config']
      raise "File not found: #{cmdlineopt['config']}" unless
         File.exist? cmdlineopt['config']
      read_config(cmdlineopt['config'])
   else
      cfgfilepath.each do |file|
         if File.readable? file
            @config = file
            read_config(file)
            break
         end
      end
   end

   cmdlineopt.each_pair do |opt, val|
      merge_cmdlineopt(opt, val)
   end

   if self.has_key? 'version' and self['version']
       puts @caller_version
       Process.exit(0)
   end

    if self.has_key? 'help' and self['help']
       help_pattern = /(?:^=head1 +SYNOPSIS|^# *=+ *SYNOPSIS)(.*?)(?:^=head1|^# *=+)/m
       myscript = File.expand_path($0)
       begin
           script_text = File.open(myscript, 'r') { |fh| fh.read }
           if /This file was generated by RubyGems/.match script_text
               # Well, thank you RubyGems. Now I have to guess where
               # my code ended up.
               #
               # The ruby gems wrapper for these scripts has some
               # special way of restricting versions here; I'm hoping
               # that since that has been done (and I no longer have
               # access to the special first argument that overrides
               # the version) that the fact that the 'gem' call has
               # already been called with that version will help
               # the following work correctly. Because there's no
               # real other alternative.
               #
               # This 'parsing' is really a load of crap. Sure hope
               # Rubygems never changes anything.
               # -jdb/20141010
               if m = /^\s*load +(.*)$/.match(script_text)
                   script_file = eval("version = nil\n" + m[1])
                   script_text = File.open(script_file, 'r') { |fh| fh.read }
               end
           end
           m = help_pattern.match(script_text)
           if m
               puts m[1].gsub(/^# ?/m, '').strip
           else
               puts 'No help'
           end
       rescue Errno::ENOENT
           puts "No help (could not search #{myscript})"
       end
       Process.exit(0)
   end
end

Instance Attribute Details

#config ⇒ Object

Returns the value of attribute config.



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# File 'lib/noms/optconfig.rb', line 42

def config
  @config
end

#default ⇒ Object

Returns the value of attribute default.



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# File 'lib/noms/optconfig.rb', line 42

def default
  @default
end

#domain ⇒ Object

Returns the value of attribute domain.



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# File 'lib/noms/optconfig.rb', line 42

def domain
  @domain
end

#optspec ⇒ Object

Returns the value of attribute optspec.



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# File 'lib/noms/optconfig.rb', line 42

def optspec
  @optspec
end

Instance Method Details

#add_standard_opts(submitted_optspec) ⇒ Object 



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# File 'lib/noms/optconfig.rb', line 44

def add_standard_opts(submitted_optspec)
   optspec = submitted_optspec
   standard_opts = {
      'config=s' => nil,
      'debug+' => 0,
      'verbose+' => 0,
      'version' => false,
      'help' => false,
      'dry-run!' => false }
   standard_opts.each_pair do |opt, defval|
      if ! optspec.has_key? opt
         optspec[opt] = defval
      end
   end
   optspec
end

#dbg(level, *msg) ⇒ Object 



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# File 'lib/noms/optconfig.rb', line 180

def dbg(level, *msg)
   if self['debug'] >= level
      puts "DBG(#{@domain}): " + msg.join("DBG(#{@domain}):    ")
   end
end

#merge_cmdlineopt(opt, val) ⇒ Object 



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# File 'lib/noms/optconfig.rb', line 151

def merge_cmdlineopt(opt, val)
   if self.has_key? opt
      if self[opt].respond_to? :keys
         if val.respond_to? :keys
            # Both hashes, merge
            val.each_pair { |k, v| self[opt][k] = v }
         else
            self[opt] = val
         end
      elsif self[opt].respond_to? :unshift
         if val.respond_to? :each and val.respond_to? :reverse
            val.reverse.each { |v| self[opt].unshift(v) }
         else
            self[opt] = val
         end
      else
         self[opt] = val
      end
   else
      self[opt] = val
   end

   self[opt]
end

#read_config(file) ⇒ Object 



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# File 'lib/noms/optconfig.rb', line 144

def read_config(file)
   fileconfig = File.open(file) { |fh| JSON.load(fh) }
   fileconfig.each_pair do |opt, val|
      self[opt] = val
   end
end

#vrb(level, *msg) ⇒ Object 



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# File 'lib/noms/optconfig.rb', line 176

def vrb(level, *msg)
   puts msg.join("\n") if self['verbose'] >= level
end