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module Paperclip
module Helpers
def configure
yield(self) if block_given?
end
def interpolates key, &block
Paperclip::Interpolations[key] = block
end
# The run method takes the name of a binary to run, the arguments to that binary
# and some options:
#
# :command_path -> A $PATH-like variable that defines where to look for the binary
# on the filesystem. Colon-separated, just like $PATH.
#
# :expected_outcodes -> An array of integers that defines the expected exit codes
# of the binary. Defaults to [0].
#
# :log_command -> Log the command being run when set to true (defaults to false).
# This will only log if logging in general is set to true as well.
#
# :swallow_stderr -> Set to true if you don't care what happens on STDERR.
#
def run(cmd, arguments = "", local_options = {})
command_path = options[:command_path]
Cocaine::CommandLine.path = [Cocaine::CommandLine.path, command_path].flatten.compact.uniq
if logging? && (options[:log_command] || local_options[:log_command])
local_options = local_options.merge(:logger => logger)
end
Cocaine::CommandLine.new(cmd, arguments, local_options).run
end
# Find all instances of the given Active Record model +klass+ with attachment +name+.
# This method is used by the refresh rake tasks.
def each_instance_with_attachment(klass, name)
class_for(klass).unscoped.where("#{name}_file_name IS NOT NULL").find_each do |instance|
yield(instance)
end
end
def class_for(class_name)
class_name.split('::').inject(Object) do |klass, partial_class_name|
if klass.const_defined?(partial_class_name)
klass.const_get(partial_class_name, false)
else
klass.const_missing(partial_class_name)
end
end
end
def check_for_url_clash(name,url,klass)
@names_url ||= {}
default_url = url || Attachment.default_options[:url]
if @names_url[name] && @names_url[name][:url] == default_url && @names_url[name][:class] != klass && @names_url[name][:url] !~ /:class/
log("Duplicate URL for #{name} with #{default_url}. This will clash with attachment defined in #{@names_url[name][:class]} class")
end
@names_url[name] = {:url => default_url, :class => klass}
end
def reset_duplicate_clash_check!
@names_url = nil
end
end
end
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