guardian / play-secret-rotation - Conditional Complexity

Intro

Conditional complexity (also called cyclomatic complexity) is a term used to measure the complexity of software. The term refers to the number of possible paths through a program function. A higher value ofter means higher maintenance and testing costs (infosecinstitute.com).
Conditional complexity is calculated by counting all conditions in the program that can affect the execution path (e.g. if statement, loops, switches, and/or operators, try and catch blocks...).
Conditional complexity is measured at the unit level (methods, functions...).
Units are classified in four categories based on the measured McCabe index: 1-5 (simple units), 6-10 (medium complex units), 11-25 (complex units), 26+ (very complex units).

Conditional Complexity Overall

Legend:

51+

26-50

11-25

6-10

1-5

Alternative Visuals

Conditional Complexity per Extension

51+

26-50

11-25

6-10

1-5

Conditional Complexity per Logical Component

primary logical decomposition

51+

26-50

11-25

6-10

1-5

Most Complex Units

Top 13 most complex units

Unit	# lines	McCabe index	# params
def snapshot() in core/src/main/scala/com/gu/play/secretrotation/DualSecretTransition.scala	31	8	0
def loadState() in aws-parameterstore/secret-supplier/SecretSupplier.scala	18	3	0
private def signerForActiveSecret() in play/play-v30/RotatingSecretComponents.scala	13	2	0
private def signerForActiveSecret() in play/play-v29/RotatingSecretComponents.scala	13	2	0
def requestFactoryFor() in play/play-v30/RotatingSecretComponents.scala	17	1	2
def requestFactoryFor() in play/play-v29/RotatingSecretComponents.scala	17	1	2
def lambdaHandler() in aws-parameterstore/lambda/Lambda.scala	7	1	2
def updateSecret() in aws-parameterstore/lambda/Lambda.scala	15	1	0
override def decode[T]() in core/src/main/scala/com/gu/play/secretrotation/DualSecretTransition.scala	6	1	2
final def accepted: LazyList[T] = LazyList() in core/src/main/scala/com/gu/play/secretrotation/Phase.scala	9	1	1
def decode[T]() in core/src/main/scala/com/gu/play/secretrotation/SnapshotProvider.scala	4	1	2
def snapshot() in core/src/main/scala/com/gu/play/secretrotation/SnapshotProvider.scala	3	1	0
def awsParameterStoreWithSdkVersion() in build.sbt	30	1	1