Duplication · anthropics/cargo-nix-plugin

Duplication Overall

5% duplication:

8,897 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
455 duplicated lines

37 duplicates

dependency graphs: 2D graph | 2D graph (with duplicates)... | 3D graph | 3D graph (with duplicates)...

Duplication per Extension

Duplication per Component (primary)

Longest Duplicates

The list of 37 longest duplicates.

See data for all 37 duplicates...

Size	#	Folders	Files	Lines	Code
15	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	966:981 (1%) 1088:1103 (1%)	view
15	x 2	rust/src rust/src	cfg_eval.rs resolve.rs	81:98 (9%) 610:627 (2%)	view
15	x 2	rust/src rust/src	cfg_eval.rs ffi.rs	81:98 (9%) 187:208 (7%)	view
15	x 2	rust/src rust/src	ffi.rs resolve.rs	187:208 (7%) 610:627 (2%)	view
13	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	1167:1179 (1%) 1223:1235 (1%)	view
13	x 2	ROOT lib	nix flake.nix default.nix	1:13 (5%) 1:13 (1%)	view
12	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	967:978 (1%) 1140:1151 (1%)	view
12	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	1089:1100 (1%) 1140:1151 (1%)	view
11	x 2	rust/src rust/src	feature_resolve.rs feature_resolve.rs	291:301 (2%) 318:328 (2%)	view
9	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	manifest.rs manifest.rs	1091:1099 (<1%) 1134:1142 (<1%)	view
9	x 2	ROOT ROOT	nix flake.nix flake.nix	156:164 (3%) 247:255 (3%)	view
8	x 2	rust/src rust/src	feature_resolve.rs feature_resolve.rs	462:469 (1%) 583:590 (1%)	view
8	x 2	builder/src/build_rust_crate builder/src/build_rust_crate	configure.rs configure.rs	904:911 (<1%) 947:954 (<1%)	view
8	x 2	builder/src/build_rust_crate builder/src/build_rust_crate	doctest.rs doctest.rs	167:174 (4%) 206:213 (4%)	view
8	x 2	rust/src rust/src	lockfile.rs lockfile.rs	81:89 (7%) 107:115 (7%)	view
8	x 2	rust/src rust/src	resolve.rs resolve.rs	1010:1019 (1%) 1023:1032 (1%)	view
7	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	213:219 (<1%) 270:276 (<1%)	view
7	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	1074:1081 (<1%) 1280:1286 (<1%)	view
7	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	1172:1178 (<1%) 1297:1303 (<1%)	view
7	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	1228:1234 (<1%) 1297:1303 (<1%)	view
7	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	manifest.rs manifest.rs	1186:1192 (<1%) 1208:1214 (<1%)	view
7	x 2	rust/src rust/src	resolve.rs resolve.rs	253:259 (<1%) 315:321 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	939:945 (<1%) 1073:1079 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	939:945 (<1%) 1347:1352 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	983:988 (<1%) 1105:1110 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	1073:1079 (<1%) 1347:1352 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	1109:1114 (<1%) 1174:1179 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	1109:1114 (<1%) 1230:1235 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs	1300:1305 (<1%) 1396:1401 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	manifest.rs manifest.rs	535:540 (<1%) 603:608 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	manifest.rs manifest.rs	819:824 (<1%) 856:861 (<1%)	view
6	x 2	rust/src/lockfile_resolve rust/src/lockfile_resolve	manifest.rs manifest.rs	992:997 (<1%) 1025:1030 (<1%)	view
6	x 2	rust/src rust/src	cargo_config.rs cargo_config.rs	233:240 (2%) 358:365 (2%)	view
6	x 2	rust/src rust/src	cargo_config.rs cargo_config.rs	233:240 (2%) 374:381 (2%)	view
6	x 2	rust/src rust/src	cargo_config.rs cargo_config.rs	358:365 (2%) 374:381 (2%)	view
6	x 2	rust/src/lockfile_resolve rust/src	mod.rs resolve.rs	677:682 (<1%) 390:398 (<1%)	view
6	x 2	nix nix	nix build-rust-crate-bin.nix cargo-nix-prefetch.nix	1:8 (50%) 1:8 (33%)	view

Most Frequent Duplicates

The list of 22 most frequently found duplicates.

Size	#	Folders	Files	Lines	Code
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	87:92 (3%) 616:621 (<1%) 193:198 (3%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	973:978 (<1%) 1095:1100 (<1%) 1146:1151 (<1%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	1173:1178 (<1%) 1229:1234 (<1%) 1298:1303 (<1%)	view
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	85:90 (3%) 614:619 (<1%) 191:196 (3%)	view
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	89:94 (3%) 618:623 (<1%) 195:200 (3%)	view
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	90:98 (3%) 619:627 (<1%) 196:208 (3%)	view
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	81:86 (3%) 610:615 (<1%) 187:192 (3%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	970:975 (<1%) 1092:1097 (<1%) 1143:1148 (<1%)	view
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	82:87 (3%) 611:616 (<1%) 188:193 (3%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	971:976 (<1%) 1093:1098 (<1%) 1144:1149 (<1%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	939:945 (<1%) 1073:1079 (<1%) 1347:1352 (<1%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	1109:1114 (<1%) 1174:1179 (<1%) 1230:1235 (<1%)	view
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	88:93 (3%) 617:622 (<1%) 194:199 (3%)	view
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	86:91 (3%) 615:620 (<1%) 192:197 (3%)	view
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	83:88 (3%) 612:617 (<1%) 189:194 (3%)	view
6	x 3	rust/src rust/src rust/src	cfg_eval.rs resolve.rs ffi.rs	84:89 (3%) 613:618 (<1%) 190:195 (3%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	969:974 (<1%) 1091:1096 (<1%) 1142:1147 (<1%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	968:973 (<1%) 1090:1095 (<1%) 1141:1146 (<1%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	1172:1177 (<1%) 1228:1233 (<1%) 1297:1302 (<1%)	view
6	x 3	rust/src rust/src rust/src	cargo_config.rs cargo_config.rs cargo_config.rs	233:240 (2%) 358:365 (2%) 374:381 (2%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	967:972 (<1%) 1089:1094 (<1%) 1140:1145 (<1%)	view
6	x 3	rust/src/lockfile_resolve rust/src/lockfile_resolve rust/src/lockfile_resolve	mod.rs mod.rs mod.rs	972:977 (<1%) 1094:1099 (<1%) 1145:1150 (<1%)	view

Duplicated Units

The list of top 1 duplicated units.

See data for all 1 unit duplicate

Size	#	Folders	Files	Lines	Code
14	x 3	rust/src rust/src rust/src	resolve.rs ffi.rs cfg_eval.rs	610:625 187:202 81:96	view

About This Analysis

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...

To learn more about duplications and techniques for eliminating duplication, Sokrates recommends the following resources:

Avoid Repetition, MartinFlower.com (IEEE Software article)
Refactoring duplicated code, sourcemaking.com
Beck Design Rules, MartinFowler.com
DRY (Don't Repeat Yourself) Principle, Wikipedia
The Cut-and-Paste Programming Software Development Anti-Pattern, sourcemaking.com
Code Smells / Duplicated Code, Jeff Atwood, codinghorror.com:

"Duplicated code is the bane of software development. Stamp out duplication whenever possible. You should always be on the lookout for more subtle cases of near-duplication, too. Don't Repeat Yourself!"

Reducing Coupling, MartinFlower.com (IEEE Software article):

"There are several ways to describe coupling, but it boils down to this: If changing one module in a program requires changing another module, then coupling exists. ... Duplication always implies coupling, because changing one piece of duplicate code implies changing the other."