Class: Piggly::Dumper::Index

Inherits:
Object
  • Object
show all
Defined in:
lib/piggly/dumper/index.rb

Overview

The index file stores metadata about every procedure, but the source code is stored in a separate file for each procedure.

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Index

Returns a new instance of Index.



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# File 'lib/piggly/dumper/index.rb', line 10

def initialize(config)
  @config = config
end

Instance Method Details

#[](identifier) ⇒ Object

Returns the Procedure with the given identifier



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# File 'lib/piggly/dumper/index.rb', line 50

def [](identifier)
  p = index[identifier]
  p.dup if p
end

#label(procedure) ⇒ Object

Returns the shortest human-readable label that distinctly identifies the given procedure from the other procedures in the index



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# File 'lib/piggly/dumper/index.rb', line 57

def label(procedure)
  others =
    procedures.reject{|p| p.oid == procedure.oid }

  same =
    others.all?{|p| p.name.schema == procedure.name.schema }

  name =
    if same
      procedure.name.name
    else
      procedure.name.to_s
    end

  samenames =
    others.select{|p| p.name == procedure.name }

  if samenames.empty?
    # Name is unique enough
    name.to_s
  else
    sameargs =
      samenames.select{|p| p.arg_types == procedure.arg_types }

    if sameargs.empty?
      # Name and arg types are unique enough
      "#{name}(#{procedure.arg_types.join(", ")})"
    else
      samemodes =
        sameargs.select{|p| p.arg_modes == procedure.arg_modes }

      if samemodes.empty?
        # Name, arg types, and arg modes are unique enough
        "#{name}(#{procedure.arg_modes.zip(procedure.arg_types).map{|a,b| "#{a} #{b}" }.join(", ")})"
      end
    end
  end
end

#path ⇒ String

Returns:

  • (String) 


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# File 'lib/piggly/dumper/index.rb', line 15

def path
  @config.mkpath("#{@config.cache_root}/Dumper", "index.yml")
end

#procedures ⇒ Object

Returns a list of Procedure values from the index



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# File 'lib/piggly/dumper/index.rb', line 45

def procedures
  index.values
end

#update(procedures) ⇒ void

This method returns an undefined value.

Updates the index with the given list of Procedure values



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# File 'lib/piggly/dumper/index.rb', line 21

def update(procedures)
  newest = Util::Enumerable.index_by(procedures){|x| x.identifier }

  removed = index.values.reject{|p| newest.include?(p.identifier) }
  removed.each{|p| p.purge_source(@config) }

  added = procedures.reject{|p| index.include?(p.identifier) }
  added.each{|p| p.store_source(@config) }

  changed = procedures.select do |p|
    if mine = index[p.identifier]
      # If both are skeletons, they will have the same source because they
      # are read from the same file, so don't bother checking that case
      not (mine.skeleton? and p.skeleton?) and
        mine.source(@config) != p.source(@config)
    end
  end
  changed.each{|p| p.store_source(@config) }

  @index = newest
  store_index
end