Class: Dhallish::Ast::Import

Inherits:
Object
  • Object
show all
Defined in:
lib/ast.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(prefix, src, import_as_text) ⇒ Import

Returns a new instance of Import.



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# File 'lib/ast.rb', line 615

def initialize(prefix, src, import_as_text)
	@prefix = prefix
	@src = src
	@import_as_text = import_as_text
	@buf = nil
end

Instance Attribute Details

#buf ⇒ Object

Returns the value of attribute buf.



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# File 'lib/ast.rb', line 613

def buf
  @buf
end

#import_as_text ⇒ Object

Returns the value of attribute import_as_text.



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# File 'lib/ast.rb', line 612

def import_as_text
  @import_as_text
end

#prefix ⇒ Object

Returns the value of attribute prefix.



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# File 'lib/ast.rb', line 610

def prefix
  @prefix
end

#src ⇒ Object

Returns the value of attribute src.



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# File 'lib/ast.rb', line 611

def src
  @src
end

Instance Method Details

#compute_type(ctx) ⇒ Object 



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# File 'lib/ast.rb', line 622

def compute_type(ctx)
	new_path = nil
	text = nil
	if prefix == "env:"
		text = ENV[@src]
		if text.nil?
			raise NameError, "#{@src}: no such environment variable set"
		end
	else
		src = @src
		if prefix == "./" or prefix == "../"
			basedir = ctx["<#DIR#>"]
			if basedir.is_a? String
				src = File.join basedir , (@prefix + src)
				new_path = File.dirname src
			else
				opath = basedir.path
				basedir.path = File.join basedir.path,  (@prefix + src)
				src = basedir.to_s
				basedir.path = File.dirname basedir.path
				new_path = URI basedir.to_s
				basedir.path = opath
			end
		elsif prefix == "~/"
			# ruby does not expand '~'
			src = File.join ENV['HOME'], src
			new_path = ENV['HOME']
		else
			src = @prefix + src
			new_path = URI src
			new_path.path = File.dirname new_path.path
		end

		file = open(src)
		text = file.read

		if text.nil?
			raise IOError, "url or file not found"
		end
	end

	if @import_as_text
		@buf = text
		Types::Text
	else
		# treat as dhallish expression
		@buf, type = Dhallish::evaluate(text, Dhallish::empty_context(new_path))
		type
	end
end

#evaluate(ctx) ⇒ Object 



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# File 'lib/ast.rb', line 673

def evaluate(ctx) @buf end