Class: Chef::Cookbook::RemoteFileVendor

Inherits:
FileVendor
  • Object
show all
Defined in:
lib/chef/cookbook/remote_file_vendor.rb

Overview

Chef::Cookbook::RemoteFileVendor

This FileVendor loads files by either fetching them from the local cache, or if not available, loading them from the remote server.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from FileVendor

create_from_manifest, fetch_from_disk, fetch_from_remote, initialization_options, vendor_class

Constructor Details

#initialize(manifest, rest) ⇒ RemoteFileVendor

Returns a new instance of RemoteFileVendor.



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# File 'lib/chef/cookbook/remote_file_vendor.rb', line 30

def initialize(manifest, rest)
  @manifest = manifest
  @cookbook_name = @manifest.name
  @rest = rest
end

Instance Attribute Details

#cookbook_name ⇒ Object (readonly)

Returns the value of attribute cookbook_name.



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# File 'lib/chef/cookbook/remote_file_vendor.rb', line 28

def cookbook_name
  @cookbook_name
end

#rest ⇒ Object (readonly)

Returns the value of attribute rest.



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# File 'lib/chef/cookbook/remote_file_vendor.rb', line 27

def rest
  @rest
end

Instance Method Details

#get_filename(filename) ⇒ Object

Implements abstract base’s requirement. It looks in the Chef::Config.cookbook_path file hierarchy for the requested file.



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# File 'lib/chef/cookbook/remote_file_vendor.rb', line 39

def get_filename(filename)
  if filename =~ %r{([^/]+)/(.+)$}
    segment = $1
  else
    raise "get_filename: Cannot determine segment/filename for incoming filename #{filename}"
  end

  files_for_segment = @manifest.files_for(segment)
  raise "No such segment #{segment} in cookbook #{@cookbook_name}" unless files_for_segment

  found_manifest_record = files_for_segment.find { |manifest_record| manifest_record[:path] == filename }
  raise "No such file #{filename} in #{@cookbook_name}" unless found_manifest_record

  cache_filename = File.join("cookbooks", @cookbook_name, found_manifest_record["path"])

  # update valid_cache_entries so the upstream cache cleaner knows what
  # we've used.
  validate_cached_copy(cache_filename)

  current_checksum = nil
  if Chef::FileCache.key?(cache_filename)
    current_checksum = Chef::CookbookVersion.checksum_cookbook_file(Chef::FileCache.load(cache_filename, false))
  end

  # If the checksums are different between on-disk (current) and on-server
  # (remote, per manifest), do the update. This will also execute if there
  # is no current checksum.
  if current_checksum != found_manifest_record["checksum"]
    raw_file = @rest.streaming_request(found_manifest_record[:url])

    Chef::Log.trace("Storing updated #{cache_filename} in the cache.")
    Chef::FileCache.move_to(raw_file.path, cache_filename)
  else
    Chef::Log.trace("Not fetching #{cache_filename}, as the cache is up to date.")
    Chef::Log.trace("Current checksum: #{current_checksum}; manifest checksum: #{found_manifest_record["checksum"]})")
  end

  # return the filename, not the contents (second argument= false)
  Chef::FileCache.load(cache_filename, false)
end

#validate_cached_copy(cache_filename) ⇒ Object 



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# File 'lib/chef/cookbook/remote_file_vendor.rb', line 80

def validate_cached_copy(cache_filename)
  CookbookCacheCleaner.instance.mark_file_as_valid(cache_filename)
end