apple / swift-package-manager
Duplication

Places in code with 6 or more lines that are exactly the same.

Intro
  • For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
  • Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
  • You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.
Learn more...
Duplication Overall
  • 7% duplication:
    • 45,465 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
    • 3,570 duplicated lines
  • 375 duplicates
system7% (3,570 lines)
Duplication per Extension
swift7% (3,456 lines)
c12% (90 lines)
m72% (16 lines)
mm100% (8 lines)
Duplication per Component (primary)
Sources/PackageDescription25% (490 lines)
Sources/Workspace7% (415 lines)
Sources/SPMTestSupport12% (331 lines)
Fixtures/Miscellaneous24% (286 lines)
Sources/PackageCollections8% (269 lines)
Sources/PackageCollectionsSigning11% (190 lines)
Sources/PackageModel6% (189 lines)
Sources/Commands3% (169 lines)
Sources/PackageRegistry16% (134 lines)
Sources/PackageLoading4% (130 lines)
Sources/PackagePlugin13% (126 lines)
Sources/XCBuildSupport3% (94 lines)
Sources/PackageCollectionsSigningLibc11% (90 lines)
Sources/Xcodeproj5% (89 lines)
Sources/Basics4% (87 lines)
Fixtures/DependencyResolution21% (84 lines)
Sources/SPMBuildCore7% (81 lines)
Sources/LLBuildManifest15% (78 lines)
Fixtures/Resources69% (62 lines)
Sources/Build1% (50 lines)
Sources/SourceControl4% (40 lines)
Sources/PackageCollectionsModel13% (36 lines)
Sources/PackageGraph<1% (16 lines)
ROOT3% (14 lines)
Sources/SPMPackageEditor3% (14 lines)
Sources/PackageFingerprint3% (6 lines)
Fixtures/CFamilyTargets0% (0 lines)
Fixtures/ModuleMaps0% (0 lines)
Fixtures/ValidLayouts0% (0 lines)
Sources/SPMLLBuild0% (0 lines)
Sources/swift-build0% (0 lines)
Sources/swift-package-collection0% (0 lines)
Sources/swift-package-registry0% (0 lines)
Sources/swift-package0% (0 lines)
Sources/swift-run0% (0 lines)
Sources/swift-test0% (0 lines)
Sources/swiftpm-manifest-tool0% (0 lines)
Sources/swiftpm-xctest-helper0% (0 lines)
Sources/tsan_utils0% (0 lines)
Utilities/Docker0% (0 lines)
Utilities/Emacs0% (0 lines)
Utilities0% (0 lines)
cmake/modules0% (0 lines)

Duplication Between Components (50+ lines)

G Fixtures/DependencyResolution Fixtures/DependencyResolution Fixtures/Miscellaneous Fixtures/Miscellaneous Fixtures/DependencyResolution--Fixtures/Miscellaneous 134 Sources/PackagePlugin Sources/PackagePlugin Sources/SPMBuildCore Sources/SPMBuildCore Sources/PackagePlugin--Sources/SPMBuildCore 100 Sources/Basics Sources/Basics Sources/PackageCollections Sources/PackageCollections Sources/Basics--Sources/PackageCollections 82 Sources/PackageCollectionsModel Sources/PackageCollectionsModel Sources/PackageCollections--Sources/PackageCollectionsModel 54 Sources/PackageModel Sources/PackageModel Sources/SPMTestSupport Sources/SPMTestSupport Sources/PackageModel--Sources/SPMTestSupport 62 Sources/PackageDescription Sources/PackageDescription Sources/PackageLoading Sources/PackageLoading Sources/PackageDescription--Sources/PackageLoading 60

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Show more details on duplication between components...
Longest Duplicates
The list of 20 longest duplicates.
See data for all 375 duplicates...
Size#FoldersFilesLinesCode
38 x 2 Sources/PackageCollectionsSigning/Certificate
Sources/PackageCollectionsSigning/Certificate
CertificatePolicy.swift
CertificatePolicy.swift
 682:747 (7%)
786:851 (7%)
 view
32 x 2 Sources/PackageCollectionsSigningLibc/asn1
Sources/PackageCollectionsSigningLibc/asn1
a_d2i_fp.c
a_d2i_fp.c
 243:280 (12%)
342:379 (12%)
 view
30 x 2 Sources/PackageDescription
Sources/PackageLoading
ContextModel.swift
ContextModel.swift
 13:61 (100%)
13:61 (100%)
 view
22 x 2 Sources/PackagePlugin
Sources/SPMBuildCore
PluginInput.swift
PluginInvocation.swift
 398:425 (7%)
703:730 (3%)
 view
21 x 2 Sources/PackageDescription
Sources/PackageDescription
Target.swift
Target.swift
 455:475 (3%)
566:586 (3%)
 view
20 x 2 Sources/PackageDescription
Sources/PackageDescription
Target.swift
Target.swift
 401:420 (3%)
511:530 (3%)
 view
19 x 2 Sources/PackageModel/Manifest
Sources/PackageModel
TargetDescription.swift
Target.swift
 273:297 (8%)
683:707 (3%)
 view
19 x 2 Sources/Basics
Sources/PackageCollections/Storage
SQLiteBackedCache.swift
SQLitePackageCollectionsStorage.swift
 125:148 (12%)
881:904 (2%)
 view
19 x 2 Sources/Workspace
Sources/Workspace
WorkspaceState.swift
WorkspaceState.swift
 278:299 (3%)
545:566 (3%)
 view
19 x 2 Sources/PackageCollections/Model
Sources/PackageCollectionsModel
Collection.swift
PackageCollectionModel+v1.swift
 212:247 (15%)
415:450 (7%)
 view
18 x 2 Sources/Commands
Sources/Commands
Describe.swift
Describe.swift
 384:401 (5%)
433:450 (5%)
 view
18 x 2 Sources/SPMTestSupport
Sources/SPMTestSupport
ManifestExtensions.swift
ManifestExtensions.swift
 55:72 (9%)
91:108 (9%)
 view
17 x 2 Sources/PackageCollectionsSigning/Certificate
Sources/PackageCollectionsSigning/Certificate
CertificatePolicy.swift
CertificatePolicy.swift
 622:644 (3%)
818:840 (3%)
 view
17 x 2 Sources/SPMTestSupport
Sources/SPMTestSupport
ManifestExtensions.swift
ManifestExtensions.swift
 92:108 (8%)
129:145 (8%)
 view
17 x 2 Sources/SPMTestSupport
Sources/SPMTestSupport
ManifestExtensions.swift
ManifestExtensions.swift
 56:72 (8%)
129:145 (8%)
 view
17 x 2 Sources/PackageCollectionsSigning/Certificate
Sources/PackageCollectionsSigning/Certificate
CertificatePolicy.swift
CertificatePolicy.swift
 622:644 (3%)
714:736 (3%)
 view
16 x 2 Sources/Basics
Sources/PackageCollections/Storage
SQLiteBackedCache.swift
SQLitePackageCollectionsStorage.swift
 154:172 (10%)
912:930 (2%)
 view
16 x 2 Sources/SPMTestSupport
Sources/SPMTestSupport
ManifestExtensions.swift
ManifestExtensions.swift
 21:36 (8%)
93:108 (8%)
 view
16 x 2 Sources/SPMTestSupport
Sources/SPMTestSupport
ManifestExtensions.swift
ManifestExtensions.swift
 21:36 (8%)
130:145 (8%)
 view
16 x 2 Sources/SPMTestSupport
Sources/SPMTestSupport
ManifestExtensions.swift
ManifestExtensions.swift
 21:36 (8%)
57:72 (8%)
 view
Duplicated Units
The list of top 7 duplicated units.
See data for all 7 unit duplicates...
Size#FoldersFilesLinesCode
24 x 2 Fixtures/Miscellaneous/P...ourceGenBuildToolPlugin
Fixtures/Miscellaneous/P...gins/PluginScriptTarget
plugin.swift
Script.swift
 6:30 
6:30 
 view
19 x 2 Sources/PackageCollectionsSigning/Certificate
Sources/PackageCollectionsSigning/Certificate
CertificatePolicy.swift
CertificatePolicy.swift
 706:727 
810:831 
 view
15 x 2 Sources/Workspace
Sources/Workspace
WorkspaceState.swift
WorkspaceState.swift
 286:301 
553:568 
 view
14 x 2 Sources/Workspace
Sources/Workspace
WorkspaceState.swift
WorkspaceState.swift
 326:340 
586:600 
 view
9 x 3 Fixtures/Resources/Moved/Sources/SeaResource
Fixtures/Resources/Simple/Sources/CPPResource
Fixtures/Resources/Simple/Sources/SeaResource
main.m
main.mm
main.m
 3:12 
3:12 
3:12 
 view
7 x 2 Sources/SourceControl
Sources/Workspace
RepositoryManager.swift
WorkspaceState.swift
 496:503 
126:133 
 view
6 x 2 Sources/Commands
Sources/Commands
SwiftTool.swift
SwiftTool.swift
 126:132 
134:140 
 view