Module: DbAgile::Command::Schema::Commons

Included in:
Check, Diff, Dump, Merge, SqlScript
Defined in:
lib/dbagile/command/schema/commons.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#check_schemas ⇒ Object

Checks schema(s) first?



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# File 'lib/dbagile/command/schema/commons.rb', line 7

def check_schemas
  @check_schemas
end

#on_stdin ⇒ Object

Take schema on standard input?



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# File 'lib/dbagile/command/schema/commons.rb', line 10

def on_stdin
  @on_stdin
end

#schema_arguments ⇒ Object

Schema arguments



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# File 'lib/dbagile/command/schema/commons.rb', line 13

def schema_arguments
  @schema_arguments
end

Instance Method Details

#add_check_options(opt) ⇒ Object

Adds –[no-]check option



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# File 'lib/dbagile/command/schema/commons.rb', line 16

def add_check_options(opt)
  self.check_schemas = true
  opt.on('--[no-]check', "Perform/Bypass schema checking") do |value|
    self.check_schemas = value
  end
end

#add_stdin_options(opt) ⇒ Object

Adds –stdin option



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# File 'lib/dbagile/command/schema/commons.rb', line 24

def add_stdin_options(opt)
  opt.on('--stdin', "Take schema on the standard command input") do
    self.on_stdin = true
  end
end

#load_schema(schema_argument, check = self.check_schemas) ⇒ Object

Loads a given schema from a schema argument



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# File 'lib/dbagile/command/schema/commons.rb', line 75

def load_schema(schema_argument, check = self.check_schemas)
  schema = case schema_argument
    when :stdin
      r = environment.input_buffer.read
      s = DbAgile::Core::Schema::yaml_load(r)
      s.schema_identifier = "--stdin"
      s
    when Symbol
      with_current_database do |database|
        case schema_argument
          when :announced
            database.announced_schema(true)
          when :effective
            database.effective_schema(true)
          when :physical
            database.physical_schema
        end
      end
    when String
      s = DbAgile::Core::Schema::yaml_file_load(schema_argument)
      s.schema_identifier = schema_argument
      s
  end
  
  # A small check, to be sure
  if schema.nil?
    assumption_error!("Unexpected schema argument kind #{schema_argument}")
  end
      
  # Check schema if requested
  if check
    schema.check!
  end
  
  # Return schema now
  schema
end

#normalize_pending_arguments(arguments) ⇒ Object

Normalizes the pending arguments



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# File 'lib/dbagile/command/schema/commons.rb', line 70

def normalize_pending_arguments(arguments)
  normalize_schema_arguments(arguments)
end

#normalize_schema_argument(argument) ⇒ Object

Normalizes a schema argument



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# File 'lib/dbagile/command/schema/commons.rb', line 31

def normalize_schema_argument(argument)
  if File.exists?(argument) and File.file?(argument)
    argument
  else
    is_in!("schema", argument, [:announced, :effective, :physical])
  end
end

#normalize_schema_arguments(arguments) ⇒ Object

Normalizes the pending arguments



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# File 'lib/dbagile/command/schema/commons.rb', line 40

def normalize_schema_arguments(arguments)
  @schema_arguments = case kind_of_schema_arguments
    when :single
      if arguments.empty?
        on_stdin ? [ :stdin ] : [ :announced ]
      elsif arguments.size == 1
        arguments.collect{|arg| normalize_schema_argument(arg) }
      else
        bad_argument_list!(arguments)
      end
    when :double
      if arguments.empty?
        [ :effective, :announced ]
      elsif arguments.size == 2
        arguments.collect{|arg| normalize_schema_argument(arg) }
      else
        bad_argument_list!(arguments)
      end
    when :multiple
      if arguments.size >= 2
        arguments.collect{|arg| normalize_schema_argument(arg) }
      else
        bad_argument_list!(arguments)
      end
    else
      assumption_error!("Unexpected kind of schema argument #{kind_of_schema_arguments}")
  end
end

#with_schemas(check = self.check_schemas) ⇒ Object Also known as: with_schema

Yields the block, passing schemas as an array, according to kind_of_schema_arguments



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# File 'lib/dbagile/command/schema/commons.rb', line 115

def with_schemas(check = self.check_schemas)
  schemas = schema_arguments.collect{|arg| load_schema(arg, check)}
  case kind_of_schema_arguments
    when :single
      yield(schemas.first)
    when :double
      yield(schemas[0], schemas[1])
    when :multiple
      yield(schemas)
    else
      assumption_error!("Unexpected kind of schema argument #{kind_of_schema_arguments}")
  end
end