Class: Filesystem

Inherits:
Object
  • Object
show all
Defined in:
lib/generators/ranker/misc/filesystem.rb

Constant Summary collapse

ORIGIN =

Serves migration file generation.

'migration_origin.rb'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Filesystem

Returns a new instance of Filesystem.



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# File 'lib/generators/ranker/misc/filesystem.rb', line 10

def initialize(options)
  @timestamp = migration_timestamp
  @model_name = options.model_name
  @table_name = options.table_name
  @collection_name = options.collection_name

  clear_dir!
end

Instance Attribute Details

#errors ⇒ Object (readonly)

Returns the value of attribute errors.



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# File 'lib/generators/ranker/misc/filesystem.rb', line 8

def errors
  @errors
end

Instance Method Details

#clear_dir! ⇒ Object 



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# File 'lib/generators/ranker/misc/filesystem.rb', line 62

def clear_dir!
  # Delete all temporary files from templetes.

  files = Dir.glob(File.join(templates_dir, '*'))
  files.delete_if { |f| f =~ /\/#{ORIGIN}$/ }

  FileUtils.rm_rf(files)
  true
end

#filename ⇒ Object 



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# File 'lib/generators/ranker/misc/filesystem.rb', line 30

def filename
  # Name of migration file
  # Instance: 20150827193501_add_category_rank_to_products.rb

  @filename ||= "#{@timestamp}_add_#{@collection_name}_rank_to_#{@table_name}.rb"
end

#migration_origin ⇒ Object 



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# File 'lib/generators/ranker/misc/filesystem.rb', line 37

def migration_origin
  @migration_origin ||= File.join(templates_dir, ORIGIN)
end

#migration_target ⇒ Object 



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# File 'lib/generators/ranker/misc/filesystem.rb', line 41

def migration_target
  # Resulting file

  @migration_target ||= File.join(templates_dir, filename)
end

#store(source) ⇒ Object 



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# File 'lib/generators/ranker/misc/filesystem.rb', line 19

def store(source)
  begin
    File.open(migration_target, 'w') { |file| file.write(source) }
    true
  rescue
    @errors ||= []
    @errors << "Can't write file: #{migration_target}. Check permissions."
    false
  end
end

#unique? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generators/ranker/misc/filesystem.rb', line 47

def unique?
  # Check that project doesn't use similar file.
  # E.g. there are NO ~/rails_project/db/migrate/*add_SAME_COLLECTION_rank_to_SAME_TABLE.rb*

  files = Dir.glob(File.join(migrate_dir, '*'))

  if files.any? { |file| file =~ /#{filename[15..-1]}$/}
    @errors ||= []
    @errors << "Such migration already exists. Try `rake db:migrate`."
    false
  else
    true
  end
end