kucherenko__jscpd/fixtures/summary-demo

Summary demo: complexity

Five short files, one per language, each written so its cyclomatic complexity can be counted by hand. --summary --summary-by complexity ranks them, and the CX column is meant to be that count: one path per function, plus one per branch. Commands run from the repository root at default thresholds.

File	What it exercises	Paths
c/checkout.c	functions with no keyword to find them by, &&, ||, case	13
rust/status.rs	match arms, a match guard, a 'static lifetime	9
swift/Profile.swift	String?, ?., ??, guard, a real ternary	8
python/report.py	docstrings full of if, or, for; parameters named case and when	5
typescript/form.ts	optional properties city?:, ?., ??, an arrow function	4

Ranking by complexity

jscpd fixtures/summary-demo --summary --summary-by complexity --no-colors --no-tips
# Found 0 clones.
#
# Summary (by complexity; 6 files, 6 folders analyzed)
# Top files:
#   TOKENS  LINES  SIZE  CX  DUP%  PATH
#      176     32   710  13   0.0  c/checkout.c
#      112     24   481   9   0.0  rust/status.rs
#       88     21   446   8   0.0  swift/Profile.swift
#      103     19   584   5   0.0  python/report.py
#       96     19   441   4   0.0  typescript/form.ts
#     1142     84  4.3K   0   0.0  README.md

Every CX value equals the hand count in the table above. This README is scanned too, as markdown, and scores 0: the "if", "or" and "for" in its prose are words, not branches. Data formats (JSON, YAML, TOML, lock files) score 0 for the same reason.

Complexity without clone detection

--complexity prints the same tables without running clone detection, so it is faster on a large codebase and has no DUP% column. --summary-top limits the rows; -r ai prints the compact form and -r json writes jscpd-complexity.json.

jscpd fixtures/summary-demo --complexity --summary-top 3 --no-colors --no-tips
# Complexity (by complexity; 6 files, 6 folders analyzed)
# Top files:
#   TOKENS  LINES  SIZE  CX  PATH
#      176     32   710  13  c/checkout.c
#      112     24   481   9  rust/status.rs
#       88     21   446   8  swift/Profile.swift

How each file is counted

c/checkout.c — 13. Three functions, and C gives none of them a keyword: double line_total(…) { is recognized by what precedes its open paren, which is how it is told apart from the ) { that ends if (…) { or switch (…) {. line_total has if, ||, if, &&; shipping_zone has three case labels (the default is not a branch); free_shipping has &&, ||, &&. That is 3 + 4 + 3 + 3.

rust/status.rs — 9. A match has no keyword per arm, only the => each arm is written with. Every arm is counted and each match takes one back, because N arms are N paths: status_for has five arms and a guard (Method::Post if authorized), so 1 + 4 + 1 = 6; describe has three arms, so 1 + 2 = 3. The 'static lifetime is a lone quote that must not be mistaken for the start of a string.

swift/Profile.swift — 8. In Swift a ? is usually an optional, not a ternary. String? and manager?.nickname are written against the token before them and are not branches; age >= 18 ? "adult" : "minor" puts the ? in the open and is one. ?? is a branch, and so is guard. The three functions come to 2 + 3 + 3.

python/report.py — 5. summarize has for, if and elif, so 4, and headline has none, so 1. Everything else that looks like a branch is not one: the docstring's body mentions If, or, while, for and when on the lines after its opening quotes, and headline(case, when) uses two branch keywords as parameter names. A name the file lists as a parameter, assigns to or reads off an object is that file's own name, whatever another language reserves.

typescript/form.ts — 4. city?: string is an optional property and customer.address?.city an optional access; neither branches. The ?? in shippingLabel and the || in the arrow function hasContact do: 2 + 2.

Against lizard

lizard agrees with every row except two, and in both it is the reference that counts fewer paths than are there:

pip install lizard
lizard fixtures/summary-demo

File	CX	lizard	Why they differ
c/checkout.c	13	13
rust/status.rs	9	5	lizard counts a match once, whatever its arms
swift/Profile.swift	8	5	lizard does not count ??
python/report.py	5	5
typescript/form.ts	4	4