• There are 113 files with units, with 17,012 lines of code.
• 1 very complex files (McCabe index sum 251+; 2,127 lines of code)
• 0 complex files (McCabe index sum 126-250; 0 lines of code)
• 2 medium complex files (McCabe index sum 51-125; 1,385 lines of code)
• 13 slightly complex files (McCabe index sum 26-50; 4,414 lines of code)
• 97 simple files (McCabe index sum 1-25; 9,086 lines of code)
• 120 main files have no units (e.g. languages without unit analysis, or files without functions) and are not classified.

The McCabe index of a file grows with its size: per 100 lines tells a large but plain file from a dense one, and most complex unit whether the complexity sits in one unit or is spread over many.

File	# lines	# units	McCabe index (sum)	per 100 lines	most complex unit
rickshaw.js in riff-raff/public/javascripts	2127	179	529	25	15
AWS.scala in magenta-lib/src/main/scala/magenta/tasks	1059	34	96	9	11
representation.scala in riff-raff/app/persistence	326	21	68	21	13
Graph.scala in magenta-lib/src/main/scala/magenta/graph	258	18	50	19	7
UpdateCloudFormationTask.scala in magenta-lib/src/main/scala/magenta/tasks	438	13	48	11	7
DeployController.scala in riff-raff/app/controllers	455	17	41	9	5
api.scala in riff-raff/app/controllers	460	13	41	9	14
tasks.scala in magenta-lib/src/main/scala/magenta/tasks	392	13	38	10	9
Application.scala in riff-raff/app/controllers	330	10	36	11	7
ChangeSetTasks.scala in magenta-lib/src/main/scala/magenta/tasks	397	9	33	8	8
Deployments.scala in riff-raff/app/deployment	258	18	32	12	7
DeployGroupRunner.scala in riff-raff/app/deployment/actors	349	16	30	9	4
mapping.scala in riff-raff/app/persistence	274	17	30	11	4
postgresdb.scala in riff-raff/app/persistence	323	23	29	9	4
logging.scala in magenta-lib/src/main/scala/magenta	258	22	29	11	8
PrismLookup.scala in riff-raff/app/resources	222	11	27	12	7
ASGTasks.scala in magenta-lib/src/main/scala/magenta/tasks	326	13	25	8	5
hooks.scala in riff-raff/app/notification	204	10	23	11	6
reporting.scala in magenta-lib/src/main/scala/magenta	185	9	23	12	4
DeployFailureNotifications.scala in riff-raff/app/notification	177	9	20	11	5
ArtifactHousekeeping.scala in riff-raff/app/housekeeping	216	9	18	8	7
RestrictionChecker.scala in riff-raff/app/restrictions	58	4	18	31	8
filter.scala in riff-raff/app/deployment	218	10	18	8	4
RiffRaffYamlReader.scala in magenta-lib/src/main/scala/magenta/input	70	3	18	26	9
CloudFormationDeploymentTypeParameters.scala in magenta-lib/src/main/scala/magenta/deployment_type	216	5	18	8	5
DeployJob.scala in riff-raff/app/schedule	122	4	17	14	7
Param.scala in magenta-lib/src/main/scala/magenta/deployment_type	81	4	16	20	12
S3Location.scala in magenta-lib/src/main/scala/magenta/artifact	110	9	16	15	4
PreviewController.scala in riff-raff/app/controllers	113	2	15	13	10
Graph.scala in riff-raff/app/utils	38	3	14	37	6
FastlyTasks.scala in magenta-lib/src/main/scala/magenta/tasks	176	7	14	8	4
Project.scala in magenta-lib/src/main/scala/magenta	94	5	14	15	6
VCSInfo.scala in riff-raff/app/utils	69	4	13	19	5
DeploymentResolver.scala in magenta-lib/src/main/scala/magenta/input/resolver	148	4	13	9	4
Lambda.scala in magenta-lib/src/main/scala/magenta/deployment_type	249	3	13	5	7
ScheduledAgent.scala in riff-raff/app/utils	113	9	12	11	3
DeploymentPruner.scala in magenta-lib/src/main/scala/magenta/input/resolver	48	4	12	25	5
AutoScaling.scala in magenta-lib/src/main/scala/magenta/deployment_type	282	4	12	4	6
ContinuousDeployment.scala in riff-raff/app/ci	94	7	11	12	5
SetStackPolicyTask.scala in magenta-lib/src/main/scala/magenta/tasks/stackSetPolicy	180	7	11	6	3
models.scala in magenta-lib/src/main/scala/magenta/input	92	6	11	12	4
S3ObjectPrefixParameters.scala in magenta-lib/src/main/scala/magenta/deployment_type	97	1	11	11	11
FastlyComputeTasks.scala in magenta-lib/src/main/scala/magenta/tasks	148	5	10	7	4
Testing.scala in riff-raff/app/controllers	340	4	9	3	6
Resolver.scala in magenta-lib/src/main/scala/magenta/input/resolver	101	4	9	9	3
package.scala in magenta-lib/src/main/scala/magenta	59	3	9	15	5
FailureNotificationContents.scala in riff-raff/app/notification	99	4	8	8	5
Builds.scala in riff-raff/app/ci	40	4	8	20	5
ShutdownWhenInactive.scala in riff-raff/app/lifecycle	91	6	8	9	2
IAMPasswordProvider.scala in riff-raff/app/persistence	58	2	8	14	5

• File complexity is the sum of the McCabe indexes (conditional complexity) of the units (methods, functions...) in a file.
• Files are classified in five categories based on that sum: 1-25 (simple files), 26-50 (slightly complex files), 51-125 (medium complex files), 126-250 (complex files), 251+ (very complex files). The default bands are five times the unit complexity bands, as a file is a group of units.
• Only main code files with units are classified. Files without units (languages without unit analysis, or files without functions) have no complexity to measure and are left out rather than counted as simple.
• A very complex file holds many decisions, which often means it has too many responsibilities: a candidate to split, and a place where changes need more testing.