uber / arcanist - 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).

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Conditional Complexity Overall

There are 2,991 units with 42,499 lines of code in units (91.9% of code).

2 very complex units (866 lines of code)
23 complex units (3,403 lines of code)
116 medium complex units (8,886 lines of code)
192 simple units (7,582 lines of code)
2,658 very simple units (21,762 lines of code)

Legend:

51+

26-50

11-25

6-10

1-5

Alternative Visuals

3D view of all units

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 50 most complex units

Unit	# lines	McCabe index	# params
public function run() in src/workflow/ArcanistLintWorkflow.php	393	100	0
public function run() in src/workflow/ArcanistPatchWorkflow.php	473	96	0
public function process() in src/lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php	208	50	1
public function process() in src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php	227	49	1
public function process() in src/lint/linter/xhpast/rules/ArcanistNamingConventionsXHPASTLinterRule.php	256	45	1
public function process() in src/lint/linter/xhpast/rules/ArcanistReusedAsIteratorXHPASTLinterRule.php	170	39	1
protected function parseIndexHunk() in src/parser/ArcanistDiffParser.php	173	39	1
protected function generateChanges() in src/workflow/ArcanistDiffWorkflow.php	191	38	0
public function lintPath() in src/lint/linter/ArcanistChmodLinter.php	55	36	1
public function toGitPatch() in src/parser/ArcanistBundle.php	125	35	0
public function parseSubversionDiff() in src/parser/ArcanistDiffParser.php	105	33	2
private function getCommitMessageFromUser() in src/workflow/ArcanistDiffWorkflow.php	175	33	0
public function run() in src/workflow/ArcanistShellCompleteWorkflow.php	125	32	0
public function run() in src/workflow/ArcanistUnitWorkflow.php	130	32	0
public function process() in src/lint/linter/xhpast/rules/ArcanistReusedIteratorReferenceXHPASTLinterRule.php	125	31	1
public function process() in src/lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php	122	30	1
def main() in scripts/breakout.py	69	28	1
public function parseDiff() in src/parser/ArcanistDiffParser.php	130	28	1
protected function parseChangeset() in src/parser/ArcanistDiffParser.php	126	28	1
protected function renderContext() in src/lint/renderer/ArcanistConsoleLintRenderer.php	133	27	3
public function run() in src/workflow/ArcanistDiffWorkflow.php	206	27	0
final public function requireCleanWorkingCopy() in src/workflow/ArcanistWorkflow.php	190	27	0
public function run() in src/flow/workflow/ICTidyWorkflow.php	83	26	0
public static function applyIntralineDiff() in src/difference/ArcanistDiffUtils.php	75	26	2
private function findRevision() in src/workflow/ArcanistLandWorkflow.php	204	26	0
public function process() in src/lint/linter/xhpast/rules/ArcanistBinaryExpressionSpacingXHPASTLinterRule.php	87	25	1
protected function reconcileLocalState() in src/land/ArcanistGitLandEngine.php	167	25	0
public function run() in src/workflow/ArcanistDownloadWorkflow.php	158	25	0
public function run() in src/workflow/ArcanistFlagWorkflow.php	99	24	0
final public function parseArguments() in src/workflow/ArcanistWorkflow.php	125	24	1
final public function run() in src/lint/engine/ArcanistLintEngine.php	91	23	0
public function willWriteValue() in src/configuration/ArcanistSettings.php	62	23	2
protected function runRevisionSync() in src/flow/workflow/ICSyncWorkflow.php	142	21	1
private function resolveArcRule() in src/parser/ArcanistBaseCommitParser.php	63	21	3
protected function buildBaseCommit() in src/repository/api/ArcanistGitAPI.php	156	21	1
public function resolveBaseCommitRule() in src/repository/api/ArcanistGitAPI.php	143	21	2
public function run() in src/workflow/ArcanistLintersWorkflow.php	124	21	0
private function parseCommitMessagesIntoFields() in src/workflow/ArcanistDiffWorkflow.php	99	21	1
private function printBranches() in src/workflow/ArcanistFeatureWorkflow.php	94	21	2
private function checkForBuildablesWithPlanBehaviors() in src/workflow/ArcanistLandWorkflow.php	126	21	1
public function willLintPaths() in src/lint/linter/ArcanistPhutilLibraryLinter.php	131	20	1
public function getJiraIssuesForAttachment() in src/uber/UberTask.php	138	20	1
private function buildCommitMessage() in src/workflow/ArcanistDiffWorkflow.php	83	20	0
public function run() in src/workflow/ArcanistWhichWorkflow.php	155	20	0
public function resolveBaseCommitRule() in src/repository/api/ArcanistMercurialAPI.php	143	19	2
public function getCommandHelp() in src/workflow/ArcanistStackWorkflow.php	88	19	0
public function run() in src/workflow/ArcanistCloseRevisionWorkflow.php	101	19	0
public function run() in src/workflow/ArcanistBrowseWorkflow.php	114	19	0
public function run() in src/workflow/ArcanistAmendWorkflow.php	130	19	0
public function run() in src/flow/workflow/ICSyncWorkflow.php	73	18	0