GoogleCloudPlatform / alertmanager - 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 883 units with 14,628 lines of code in units (57.6% of code).

3 very complex units (913 lines of code)
11 complex units (1,697 lines of code)
47 medium complex units (2,810 lines of code)
93 simple units (2,693 lines of code)
729 very simple units (6,515 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
func() in nflog/nflogpb/nflog.pb.go	359	106	1
func() in config/config.go	241	95	1
func() in silence/silencepb/silence.pb.go	313	90	1
func() in cluster/clusterpb/cluster.pb.go	167	47	1
func() in notify/email/email.go	183	45	1
func run() in cmd/alertmanager/main.go	359	42	0
func() in silence/silencepb/silence.pb.go	147	41	1
func() in nflog/nflogpb/nflog.pb.go	133	37	1
func() in silence/silencepb/silence.pb.go	133	37	1
func() in nflog/nflogpb/nflog.pb.go	119	34	1
func() in silence/silencepb/silence.pb.go	119	34	1
func() in cluster/clusterpb/cluster.pb.go	116	32	1
func() in api/v2/restapi/server.go	138	30	1
func() in timeinterval/timeinterval.go	83	30	1
func() in notify/notify.go	90	25	1
func skipNflog() in nflog/nflogpb/nflog.pb.go	78	24	1
func skipCluster() in cluster/clusterpb/cluster.pb.go	78	24	1
func skipSilence() in silence/silencepb/silence.pb.go	78	24	1
func() in cluster/clusterpb/cluster.pb.go	84	23	1
func() in notify/opsgenie/opsgenie.go	146	23	1
func() in cli/silence_query.go	50	23	1
func Create() in cluster/cluster.go	111	18	14
func() in notify/wechat/wechat.go	91	18	1
func() in cli/silence_update.go	74	18	1
func resolveFilepaths() in config/config.go	50	17	2
func() in notify/slack/slack.go	117	17	1
func() in api/v2/restapi/server.go	57	16	1
func BuildReceiverIntegrations() in config/receiver/receiver.go	57	16	4
func() in notify/pushover/pushover.go	93	16	1
func() in cli/silence_add.go	71	16	1
func() in nflog/nflogpb/nflog.pb.go	91	15	1
func() in nflog/nflog.go	60	15	1
func() in config/config.go	39	15	1
func() in template/template.go	60	15	1
func() in silence/silence.go	60	15	1
func CheckSilenceMatchesFilterLabels() in api/v2/api.go	20	14	2
func() in config/notifiers.go	28	14	1
func ParseMatcher() in pkg/labels/parse.go	53	14	1
func() in notify/discord/discord.go	64	14	1
func() in notify/pagerduty/pagerduty.go	83	14	1
func NewAlertmanagerClient() in cli/root.go	42	14	1
func() in silence/silencepb/silence.pb.go	84	14	1
func NewRoute() in dispatch/route.go	56	13	2
func() in notify/msteams/msteams.go	64	13	1
func() in cli/alert_add.go	58	13	1
func() in provider/mem/mem.go	31	12	1
func PostableSilenceToProto() in api/v2/compat.go	35	12	1
func() in api/v2/api.go	59	12	1
func() in dispatch/dispatch.go	41	12	1
func() in notify/email/email.go	46	12	1