def replaceConstants()

in cloud/aws/node/generate-setup-script.py [0:0]

• 5 lines of code
• 2 McCabe index (conditional complexity)

	def replaceConstants(string, constants):
		"""
		Converts EC2 ImageBuilder constant references to PowerShell variable references
		"""
		
		# If the value of a constant is used as a magic value rather than a reference,
		# replace it with a reference to the variable representing the constant instead
		transformed = string
		for key, value in constants.items():
			transformed = transformed.replace(value, '${}'.format(key))
		
		# Convert `{{ variable }}` syntax to PowerShell `$variable` syntax
		# (Note that we don't bother to wrap the variable names in curly braces, since we know that none
		#  of the variable names contain special characters, and they're only ever interpolated as either
		#  part of a filesystem path surrounded by separators, or as a parameter surrounded by whitespace)
		return re.sub('{{ (.+?) }}', '$\\1', transformed)