• There are 331 files with units, with 40,696 lines of code.
• 0 very complex files (McCabe index sum 251+; 0 lines of code)
• 0 complex files (McCabe index sum 126-250; 0 lines of code)
• 2 medium complex files (McCabe index sum 51-125; 835 lines of code)
• 5 slightly complex files (McCabe index sum 26-50; 1,436 lines of code)
• 324 simple files (McCabe index sum 1-25; 38,425 lines of code)
• 698 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
Styles.swift in ios/reference/CoverDropUserInterface/Sources/CoverDropUserInterface/Styles	506	43	52	10	6
CoverDropLib.kt in android/core/src/main/java/com/theguardian/coverdrop/core	329	42	51	16	5
PrivateSendingQueue.kt in android/core/src/main/java/com/theguardian/coverdrop/core/crypto	254	16	31	12	7
CoverDropPublicDataRepository.kt in android/core/src/main/java/com/theguardian/coverdrop/core	219	26	30	14	3
mixing_strategy.rs in covernode/src/mixing	440	16	29	7	4
HelpView.swift in ios/reference/CoverDropUserInterface/Sources/CoverDropUserInterface	190	6	29	15	9
secret_sharing.rs in common/src/crypto	333	18	29	9	5
PublicStorage.kt in android/core/src/main/java/com/theguardian/coverdrop/core/persistence	190	21	25	13	2
SecretDataRepositoryTests.swift in ios/reference/referenceTests/Repositories	311	6	24	8	8
serde.rs in common/src/crypto/keys	339	21	24	7	2
backup.rs in common/src/protocol	833	18	23	3	3
PrivateSendingQueue.swift in ios/reference/CoverDropCore/Sources/CoverDropCore/Crypto/PrivateSendingQueue	243	9	22	9	6
CoverDropPrivateDataRepository.kt in android/core/src/main/java/com/theguardian/coverdrop/core	200	21	22	11	2
HelpScreenMarkupParser.swift in ios/reference/CoverDropUserInterface/Sources/CoverDropUserInterface/Utilities	102	5	19	19	11
StorageManager.swift in ios/reference/CoverDropCore/Sources/CoverDropCore/Persistence	132	13	19	14	3
signing.rs in common/src/crypto/keys	325	17	19	6	2
SilenceableIndirectLifecycleCallbackProxyImpl.kt in android/ui/src/main/java/com/theguardian/coverdrop/ui/tracking	91	14	18	20	3
IntegrityGuard.kt in android/core/src/main/java/com/theguardian/coverdrop/core/security	100	8	18	18	3
ConversationViewModel.swift in ios/reference/CoverDropUserInterface/Sources/CoverDropUserInterface	166	7	17	10	6
verification.rs in common/src/protocol/keys	314	7	17	5	5
AesCipher.kt in android/core/src/main/java/com/theguardian/coverdrop/core/crypto	78	8	17	22	5
KeyVerifier.kt in android/core/src/main/java/com/theguardian/coverdrop/core/crypto	313	8	16	5	4
padded_byte_vector.rs in common/src	211	13	15	7	2
signed.rs in common/src/crypto/keys	92	12	14	15	2
multi_anonymous_box.rs in common/src/crypto	220	10	14	6	3
NewSessionViewModel.kt in android/ui/src/main/java/com/theguardian/coverdrop/ui/viewmodels	144	7	14	10	4
PassphraseWordList.kt in android/core/src/main/java/com/theguardian/coverdrop/core/crypto	108	11	14	13	3
JournalistMessageView.swift in ios/reference/CoverDropUserInterface/Sources/CoverDropUserInterface	235	6	13	6	7
SecretDataRepository.swift in ios/reference/CoverDropCore/Sources/CoverDropCore/Repositories	160	13	13	8	1
prefix.rs in common/src/aws/ssm	125	13	13	10	1
lib.rs in journalist-client/src-tauri/src	246	4	13	5	8
generate_test_vectors.rs in admin/src	234	9	12	5	3
UserNewSessionView.swift in ios/reference/CoverDropUserInterface/Sources/CoverDropUserInterface	336	6	12	4	5
EncryptedStorageTests.swift in ios/reference/referenceTests	221	10	12	5	2
SelectedRecipientViewModel.kt in android/ui/src/main/java/com/theguardian/coverdrop/ui/viewmodels	83	8	12	14	2
CoverDropActivity.kt in android/ui/src/main/java/com/theguardian/coverdrop/ui/activities	150	8	12	8	2
group_messaging_service.rs in journalist-services/group-messaging-service/src	1017	6	12	1	5
promotable_id_key_pair.rs in journalist-vault/src	310	9	11	4	3
mixing_message_types.rs in covernode/src/mixing	65	8	11	17	2
UserContinueSessionView.swift in ios/reference/CoverDropUserInterface/Sources/CoverDropUserInterface	163	6	11	7	4
DeadDropDecryptionServiceTests.swift in ios/reference/referenceTests	83	1	11	13	11
CacheableApiRepository.swift in ios/reference/CoverDropCore/Sources/CoverDropCore/Repositories	84	5	11	13	3
clap.rs in common/src	209	9	11	5	2
models.rs in journalist-services/group-messaging-service/src	157	8	11	7	2
GroupChat.tsx in journalist-client/src/components	393	3	11	3	8
app.rs in tools/coverup/src/dev/watch/ui	332	4	10	3	4
CoverDropServiceTests.swift in ios/reference/referenceTests	130	8	10	8	2
BackgroundMessagesScheduleServiceTests.swift in ios/reference/referenceTests	155	10	10	6	1
PublicDataRepository.swift in ios/reference/CoverDropCore/Sources/CoverDropCore/Repositories	189	10	10	5	1
padded_compressed_string.rs in common/src	154	8	10	6	2

• 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.