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.
- 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."
Duplication Overall
- 39% duplication:
- 3,554 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 1,387 duplicated lines
- 290 duplicates
Duplication per Extension
Duplication per Component (primary)
Duplication Between Components (50+ lines)
Open 3D force graph...
Show more details on duplication between components...
From Component
--> To Component
Duplicated
Lines
File Pairs
Details
cfn-resources/database-user (34%)
--> cfn-resources/project-ip-access-list (43%)
266
4 file pairs
details...
cfn-resources/database-user (29%)
--> cfn-resources/project (47%)
231
4 file pairs
details...
cfn-resources/project-ip-access-list (36%)
--> cfn-resources/project (45%)
219
4 file pairs
details...
cfn-resources/cloud-provider-snapshot-restore-jobs (40%)
--> cfn-resources/cloud-provider-snapshots (44%)
216
4 file pairs
details...
cfn-resources/cloud-provider-snapshots (42%)
--> cfn-resources/encryption-at-rest (63%)
206
4 file pairs
details...
cfn-resources/database-user (26%)
--> cfn-resources/network-peering (23%)
204
4 file pairs
details...
cfn-resources/network-peering (23%)
--> cfn-resources/project-ip-access-list (33%)
202
4 file pairs
details...
cfn-resources/cloud-provider-snapshots (40%)
--> cfn-resources/network-container (59%)
200
4 file pairs
details...
cfn-resources/database-user (25%)
--> cfn-resources/encryption-at-rest (61%)
200
4 file pairs
details...
cfn-resources/encryption-at-rest (59%)
--> cfn-resources/project-ip-access-list (32%)
194
4 file pairs
details...
cfn-resources/cloud-provider-snapshot-restore-jobs (36%)
--> cfn-resources/encryption-at-rest (59%)
194
4 file pairs
details...
cfn-resources/network-peering (22%)
--> cfn-resources/project (39%)
190
4 file pairs
details...
cfn-resources/encryption-at-rest (58%)
--> cfn-resources/network-container (55%)
188
4 file pairs
details...
cfn-resources/encryption-at-rest (58%)
--> cfn-resources/network-peering (21%)
188
4 file pairs
details...
cfn-resources/encryption-at-rest (58%)
--> cfn-resources/project (39%)
188
4 file pairs
details...
cfn-resources/cluster (14%)
--> cfn-resources/network-peering (21%)
188
4 file pairs
details...
cfn-resources/cloud-provider-snapshots (38%)
--> cfn-resources/network-peering (21%)
188
4 file pairs
details...
cfn-resources/cloud-provider-snapshots (38%)
--> cfn-resources/database-user (24%)
188
4 file pairs
details...
cfn-resources/cloud-provider-snapshots (37%)
--> cfn-resources/project-ip-access-list (30%)
182
4 file pairs
details...
cfn-resources/cloud-provider-snapshot-restore-jobs (32%)
--> cfn-resources/database-user (22%)
176
4 file pairs
details...
cfn-resources/cloud-provider-snapshots (36%)
--> cfn-resources/project (36%)
176
4 file pairs
details...
cfn-resources/cloud-provider-snapshot-restore-jobs (32%)
--> cfn-resources/network-container (52%)
176
4 file pairs
details...
cfn-resources/cloud-provider-snapshot-restore-jobs (32%)
--> cfn-resources/project (36%)
176
4 file pairs
details...
cfn-resources/cloud-provider-snapshot-restore-jobs (31%)
--> cfn-resources/project-ip-access-list (28%)
170
4 file pairs
details...
cfn-resources/cloud-provider-snapshot-restore-jobs (30%)
--> cfn-resources/network-peering (19%)
164
3 file pairs
details...
cfn-resources/network-container (48%)
--> cfn-resources/network-peering (19%)
164
3 file pairs
details...
cfn-resources/network-container (48%)
--> cfn-resources/project (34%)
164
3 file pairs
details...
cfn-resources/database-user (21%)
--> cfn-resources/network-container (48%)
164
3 file pairs
details...
cfn-resources/cluster (12%)
--> cfn-resources/project-ip-access-list (26%)
162
4 file pairs
details...
cfn-resources/cluster (12%)
--> cfn-resources/database-user (20%)
162
4 file pairs
details...
cfn-resources/cluster (12%)
--> cfn-resources/project (33%)
162
4 file pairs
details...
cfn-resources/cloud-provider-snapshots (32%)
--> cfn-resources/cluster (12%)
160
4 file pairs
details...
cfn-resources/cluster (12%)
--> cfn-resources/encryption-at-rest (49%)
160
4 file pairs
details...
cfn-resources/network-container (46%)
--> cfn-resources/project-ip-access-list (26%)
158
3 file pairs
details...
cfn-resources/cloud-provider-snapshot-restore-jobs (27%)
--> cfn-resources/cluster (11%)
148
3 file pairs
details...
cfn-resources/cluster (11%)
--> cfn-resources/network-container (43%)
148
3 file pairs
details...
cfn-resources/cluster (4%)
--> cfn-resources (7%)
54
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| cfn-resources/database-user (34%) --> cfn-resources/project-ip-access-list (43%) |
266 | 4 file pairs | details... |
| cfn-resources/database-user (29%) --> cfn-resources/project (47%) |
231 | 4 file pairs | details... |
| cfn-resources/project-ip-access-list (36%) --> cfn-resources/project (45%) |
219 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshot-restore-jobs (40%) --> cfn-resources/cloud-provider-snapshots (44%) |
216 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshots (42%) --> cfn-resources/encryption-at-rest (63%) |
206 | 4 file pairs | details... |
| cfn-resources/database-user (26%) --> cfn-resources/network-peering (23%) |
204 | 4 file pairs | details... |
| cfn-resources/network-peering (23%) --> cfn-resources/project-ip-access-list (33%) |
202 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshots (40%) --> cfn-resources/network-container (59%) |
200 | 4 file pairs | details... |
| cfn-resources/database-user (25%) --> cfn-resources/encryption-at-rest (61%) |
200 | 4 file pairs | details... |
| cfn-resources/encryption-at-rest (59%) --> cfn-resources/project-ip-access-list (32%) |
194 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshot-restore-jobs (36%) --> cfn-resources/encryption-at-rest (59%) |
194 | 4 file pairs | details... |
| cfn-resources/network-peering (22%) --> cfn-resources/project (39%) |
190 | 4 file pairs | details... |
| cfn-resources/encryption-at-rest (58%) --> cfn-resources/network-container (55%) |
188 | 4 file pairs | details... |
| cfn-resources/encryption-at-rest (58%) --> cfn-resources/network-peering (21%) |
188 | 4 file pairs | details... |
| cfn-resources/encryption-at-rest (58%) --> cfn-resources/project (39%) |
188 | 4 file pairs | details... |
| cfn-resources/cluster (14%) --> cfn-resources/network-peering (21%) |
188 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshots (38%) --> cfn-resources/network-peering (21%) |
188 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshots (38%) --> cfn-resources/database-user (24%) |
188 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshots (37%) --> cfn-resources/project-ip-access-list (30%) |
182 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshot-restore-jobs (32%) --> cfn-resources/database-user (22%) |
176 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshots (36%) --> cfn-resources/project (36%) |
176 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshot-restore-jobs (32%) --> cfn-resources/network-container (52%) |
176 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshot-restore-jobs (32%) --> cfn-resources/project (36%) |
176 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshot-restore-jobs (31%) --> cfn-resources/project-ip-access-list (28%) |
170 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshot-restore-jobs (30%) --> cfn-resources/network-peering (19%) |
164 | 3 file pairs | details... |
| cfn-resources/network-container (48%) --> cfn-resources/network-peering (19%) |
164 | 3 file pairs | details... |
| cfn-resources/network-container (48%) --> cfn-resources/project (34%) |
164 | 3 file pairs | details... |
| cfn-resources/database-user (21%) --> cfn-resources/network-container (48%) |
164 | 3 file pairs | details... |
| cfn-resources/cluster (12%) --> cfn-resources/project-ip-access-list (26%) |
162 | 4 file pairs | details... |
| cfn-resources/cluster (12%) --> cfn-resources/database-user (20%) |
162 | 4 file pairs | details... |
| cfn-resources/cluster (12%) --> cfn-resources/project (33%) |
162 | 4 file pairs | details... |
| cfn-resources/cloud-provider-snapshots (32%) --> cfn-resources/cluster (12%) |
160 | 4 file pairs | details... |
| cfn-resources/cluster (12%) --> cfn-resources/encryption-at-rest (49%) |
160 | 4 file pairs | details... |
| cfn-resources/network-container (46%) --> cfn-resources/project-ip-access-list (26%) |
158 | 3 file pairs | details... |
| cfn-resources/cloud-provider-snapshot-restore-jobs (27%) --> cfn-resources/cluster (11%) |
148 | 3 file pairs | details... |
| cfn-resources/cluster (11%) --> cfn-resources/network-container (43%) |
148 | 3 file pairs | details... |
| cfn-resources/cluster (4%) --> cfn-resources (7%) |
54 | 1 file pair | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 36 | x 2 | cfn-resources/network-container/cmdcfn-resources/project-ip-access-list/cmd |  main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-prov...apshot-restore-jobs/cmdcfn-resources/cloud-provider-snapshots/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-prov...apshot-restore-jobs/cmdcfn-resources/cluster/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/project-ip-access-list/cmdcfn-resources/project/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/database-user/cmdcfn-resources/project-ip-access-list/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/encryption-at-rest/cmdcfn-resources/network-container/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-prov...apshot-restore-jobs/cmdcfn-resources/database-user/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/database-user/cmdcfn-resources/project/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-provider-snapshots/cmdcfn-resources/project/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-prov...apshot-restore-jobs/cmdcfn-resources/network-container/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/network-peering/cmdcfn-resources/project/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-provider-snapshots/cmdcfn-resources/encryption-at-rest/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-provider-snapshots/cmdcfn-resources/project-ip-access-list/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/encryption-at-rest/cmdcfn-resources/project-ip-access-list/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cluster/cmdcfn-resources/project-ip-access-list/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-prov...apshot-restore-jobs/cmdcfn-resources/project/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-prov...apshot-restore-jobs/cmdcfn-resources/network-peering/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cloud-provider-snapshots/cmdcfn-resources/cluster/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/network-container/cmdcfn-resources/network-peering/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
| 36 | x 2 | cfn-resources/cluster/cmdcfn-resources/database-user/cmd | main.gomain.go |
15:84 (100%)15:84 (100%) | view |
Duplicated Units
The list of top 2 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 27 | x 9 | cfn-resources/cloud-provider-snapshots/cmdcfn-resources/network-peering/cmdcfn-resources/project/cmdcfn-resources/project-ip-access-list/cmdcfn-resources/encryption-at-rest/cmdcfn-resources/database-user/cmdcfn-resources/cluster/cmdcfn-resources/network-container/cmdcfn-resources/cloud-prov...apshot-restore-jobs/cmd | main.gomain.gomain.gomain.gomain.gomain.gomain.gomain.gomain.go |
49:85 49:85 49:85 49:85 49:85 49:85 49:85 49:85 49:85 | view |
| 6 | x 4 | cfn-resources/cloud-prov...-snapshots/cmd/resourcecfn-resources/encryption-at-rest/cmd/resourcecfn-resources/network-container/cmd/resourcecfn-resources/cloud-prov...store-jobs/cmd/resource | resource.goresource.goresource.goresource.go |
90:97 69:76 17:79 116:123 | view |