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
- 27% duplication:
- 4,003 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 1,086 duplicated lines
- 119 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
src/cfn-custom-resources/react-app (34%)
--> src/cfn-custom-resources/static-site (72%)
156
2 file pairs
details...
src/cfn-custom-resources/lambda-code-update (50%)
--> src/cfn-custom-resources/us-east-1-lambda-stack (16%)
152
3 file pairs
details...
src/cfn-custom-resources/react-app (25%)
--> src/cfn-custom-resources/user-pool-domain (60%)
114
2 file pairs
details...
src/cfn-custom-resources/static-site (52%)
--> src/cfn-custom-resources/user-pool-domain (60%)
114
2 file pairs
details...
src/lambda-edge/parse-auth (22%)
--> src/lambda-edge/refresh-auth (35%)
109
1 file pair
details...
src/cfn-custom-resources/user-pool-client (21%)
--> src/cfn-custom-resources/user-pool-domain (53%)
100
2 file pairs
details...
src/cfn-custom-resources/client-secret-retrieval (54%)
--> src/cfn-custom-resources/lambda-code-update (33%)
100
2 file pairs
details...
src/cfn-custom-resources/lambda-code-update (32%)
--> src/cfn-custom-resources/user-pool-domain (52%)
98
2 file pairs
details...
src/cfn-custom-resources/client-secret-retrieval (53%)
--> src/cfn-custom-resources/react-app (21%)
98
2 file pairs
details...
src/cfn-custom-resources/static-site (45%)
--> src/cfn-custom-resources/user-pool-client (20%)
98
2 file pairs
details...
src/cfn-custom-resources/generate-secret (63%)
--> src/cfn-custom-resources/user-pool-domain (52%)
98
2 file pairs
details...
src/cfn-custom-resources/generate-secret (63%)
--> src/cfn-custom-resources/user-pool-client (20%)
98
2 file pairs
details...
src/cfn-custom-resources/lambda-code-update (32%)
--> src/cfn-custom-resources/static-site (45%)
98
2 file pairs
details...
src/cfn-custom-resources/lambda-code-update (32%)
--> src/cfn-custom-resources/react-app (21%)
98
2 file pairs
details...
src/cfn-custom-resources/generate-secret (63%)
--> src/cfn-custom-resources/lambda-code-update (32%)
98
2 file pairs
details...
src/cfn-custom-resources/react-app (21%)
--> src/cfn-custom-resources/user-pool-client (20%)
98
2 file pairs
details...
src/cfn-custom-resources/client-secret-retrieval (53%)
--> src/cfn-custom-resources/user-pool-domain (52%)
98
2 file pairs
details...
src/cfn-custom-resources/lambda-code-update (32%)
--> src/cfn-custom-resources/user-pool-client (20%)
98
2 file pairs
details...
src/cfn-custom-resources/client-secret-retrieval (53%)
--> src/cfn-custom-resources/user-pool-client (20%)
98
2 file pairs
details...
src/cfn-custom-resources/client-secret-retrieval (53%)
--> src/cfn-custom-resources/static-site (45%)
98
2 file pairs
details...
src/cfn-custom-resources/generate-secret (63%)
--> src/cfn-custom-resources/static-site (45%)
98
2 file pairs
details...
src/cfn-custom-resources/client-secret-retrieval (53%)
--> src/cfn-custom-resources/generate-secret (63%)
98
2 file pairs
details...
src/cfn-custom-resources/generate-secret (63%)
--> src/cfn-custom-resources/react-app (21%)
98
2 file pairs
details...
src/cfn-custom-resources/us-east-1-lambda-stack (10%)
--> src/cfn-custom-resources/user-pool-domain (47%)
90
2 file pairs
details...
src/cfn-custom-resources/client-secret-retrieval (49%)
--> src/cfn-custom-resources/us-east-1-lambda-stack (10%)
90
2 file pairs
details...
src/cfn-custom-resources/react-app (20%)
--> src/cfn-custom-resources/us-east-1-lambda-stack (10%)
90
2 file pairs
details...
src/cfn-custom-resources/us-east-1-lambda-stack (10%)
--> src/cfn-custom-resources/user-pool-client (19%)
90
2 file pairs
details...
src/cfn-custom-resources/static-site (41%)
--> src/cfn-custom-resources/us-east-1-lambda-stack (10%)
90
2 file pairs
details...
src/cfn-custom-resources/generate-secret (58%)
--> src/cfn-custom-resources/us-east-1-lambda-stack (10%)
90
2 file pairs
details...
example-serverless-app-reuse (16%)
--> ROOT (3%)
88
2 file pairs
details...
src/lambda-edge/parse-auth (12%)
--> src/lambda-edge/sign-out (43%)
60
1 file pair
details...
src/lambda-edge/check-auth (17%)
--> src/lambda-edge/parse-auth (12%)
59
1 file pair
details...
src/lambda-edge/refresh-auth (18%)
--> src/lambda-edge/sign-out (40%)
56
1 file pair
details...
src/cfn-custom-resources/us-east-1-lambda-stack (5%)
--> src/lambda-edge/shared (4%)
52
1 file pair
details...
src/cfn-custom-resources/lambda-code-update (17%)
--> src/lambda-edge/shared (4%)
52
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| src/cfn-custom-resources/react-app (34%) --> src/cfn-custom-resources/static-site (72%) |
156 | 2 file pairs | details... |
| src/cfn-custom-resources/lambda-code-update (50%) --> src/cfn-custom-resources/us-east-1-lambda-stack (16%) |
152 | 3 file pairs | details... |
| src/cfn-custom-resources/react-app (25%) --> src/cfn-custom-resources/user-pool-domain (60%) |
114 | 2 file pairs | details... |
| src/cfn-custom-resources/static-site (52%) --> src/cfn-custom-resources/user-pool-domain (60%) |
114 | 2 file pairs | details... |
| src/lambda-edge/parse-auth (22%) --> src/lambda-edge/refresh-auth (35%) |
109 | 1 file pair | details... |
| src/cfn-custom-resources/user-pool-client (21%) --> src/cfn-custom-resources/user-pool-domain (53%) |
100 | 2 file pairs | details... |
| src/cfn-custom-resources/client-secret-retrieval (54%) --> src/cfn-custom-resources/lambda-code-update (33%) |
100 | 2 file pairs | details... |
| src/cfn-custom-resources/lambda-code-update (32%) --> src/cfn-custom-resources/user-pool-domain (52%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/client-secret-retrieval (53%) --> src/cfn-custom-resources/react-app (21%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/static-site (45%) --> src/cfn-custom-resources/user-pool-client (20%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/generate-secret (63%) --> src/cfn-custom-resources/user-pool-domain (52%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/generate-secret (63%) --> src/cfn-custom-resources/user-pool-client (20%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/lambda-code-update (32%) --> src/cfn-custom-resources/static-site (45%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/lambda-code-update (32%) --> src/cfn-custom-resources/react-app (21%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/generate-secret (63%) --> src/cfn-custom-resources/lambda-code-update (32%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/react-app (21%) --> src/cfn-custom-resources/user-pool-client (20%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/client-secret-retrieval (53%) --> src/cfn-custom-resources/user-pool-domain (52%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/lambda-code-update (32%) --> src/cfn-custom-resources/user-pool-client (20%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/client-secret-retrieval (53%) --> src/cfn-custom-resources/user-pool-client (20%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/client-secret-retrieval (53%) --> src/cfn-custom-resources/static-site (45%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/generate-secret (63%) --> src/cfn-custom-resources/static-site (45%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/client-secret-retrieval (53%) --> src/cfn-custom-resources/generate-secret (63%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/generate-secret (63%) --> src/cfn-custom-resources/react-app (21%) |
98 | 2 file pairs | details... |
| src/cfn-custom-resources/us-east-1-lambda-stack (10%) --> src/cfn-custom-resources/user-pool-domain (47%) |
90 | 2 file pairs | details... |
| src/cfn-custom-resources/client-secret-retrieval (49%) --> src/cfn-custom-resources/us-east-1-lambda-stack (10%) |
90 | 2 file pairs | details... |
| src/cfn-custom-resources/react-app (20%) --> src/cfn-custom-resources/us-east-1-lambda-stack (10%) |
90 | 2 file pairs | details... |
| src/cfn-custom-resources/us-east-1-lambda-stack (10%) --> src/cfn-custom-resources/user-pool-client (19%) |
90 | 2 file pairs | details... |
| src/cfn-custom-resources/static-site (41%) --> src/cfn-custom-resources/us-east-1-lambda-stack (10%) |
90 | 2 file pairs | details... |
| src/cfn-custom-resources/generate-secret (58%) --> src/cfn-custom-resources/us-east-1-lambda-stack (10%) |
90 | 2 file pairs | details... |
| example-serverless-app-reuse (16%) --> ROOT (3%) |
88 | 2 file pairs | details... |
| src/lambda-edge/parse-auth (12%) --> src/lambda-edge/sign-out (43%) |
60 | 1 file pair | details... |
| src/lambda-edge/check-auth (17%) --> src/lambda-edge/parse-auth (12%) |
59 | 1 file pair | details... |
| src/lambda-edge/refresh-auth (18%) --> src/lambda-edge/sign-out (40%) |
56 | 1 file pair | details... |
| src/cfn-custom-resources/us-east-1-lambda-stack (5%) --> src/lambda-edge/shared (4%) |
52 | 1 file pair | details... |
| src/cfn-custom-resources/lambda-code-update (17%) --> src/lambda-edge/shared (4%) |
52 | 1 file pair | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 45 | x 2 | ROOTROOT |  template.yamltemplate.yaml |
791:835 (4%)931:975 (4%) | view |
| 45 | x 2 | ROOTROOT | template.yamltemplate.yaml |
931:975 (4%)985:1029 (4%) | view |
| 45 | x 2 | ROOTROOT | template.yamltemplate.yaml |
791:835 (4%)845:889 (4%) | view |
| 45 | x 2 | ROOTROOT | template.yamltemplate.yaml |
845:889 (4%)985:1029 (4%) | view |
| 45 | x 2 | ROOTROOT | template.yamltemplate.yaml |
845:889 (4%)931:975 (4%) | view |
| 45 | x 2 | ROOTROOT | template.yamltemplate.yaml |
791:835 (4%)985:1029 (4%) | view |
| 37 | x 2 | src/cfn-custom-resources/lambda-code-updatesrc/cfn-custom-resources/user-pool-domain |  cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/client-secret-retrievalsrc/cfn-custom-resources/react-app | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/static-sitesrc/cfn-custom-resources/user-pool-client | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/us-east-1-lambda-stacksrc/cfn-custom-resources/user-pool-domain | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/react-appsrc/cfn-custom-resources/user-pool-domain | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/generate-secretsrc/cfn-custom-resources/user-pool-domain | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/static-sitesrc/cfn-custom-resources/user-pool-domain | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/generate-secretsrc/cfn-custom-resources/user-pool-client | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/user-pool-clientsrc/cfn-custom-resources/user-pool-domain | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/lambda-code-updatesrc/cfn-custom-resources/static-site | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/lambda-code-updatesrc/cfn-custom-resources/react-app | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/client-secret-retrievalsrc/cfn-custom-resources/us-east-1-lambda-stack | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/generate-secretsrc/cfn-custom-resources/lambda-code-update | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
| 37 | x 2 | src/cfn-custom-resources/react-appsrc/cfn-custom-resources/user-pool-client | cfn-response.tscfn-response.ts |
6:45 (100%)6:45 (100%) | view |
Duplicated Units
The list of top 3 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 34 | x 8 | src/cfn-custom-resources/user-pool-domainsrc/cfn-custom-resources/client-secret-retrievalsrc/cfn-custom-resources/static-sitesrc/cfn-custom-resources/generate-secretsrc/cfn-custom-resources/lambda-code-updatesrc/cfn-custom-resources/react-appsrc/cfn-custom-resources/user-pool-clientsrc/cfn-custom-resources/us-east-1-lambda-stack | cfn-response.tscfn-response.tscfn-response.tscfn-response.tscfn-response.tscfn-response.tscfn-response.tscfn-response.ts |
11:46 11:46 11:46 11:46 11:46 11:46 11:46 11:46 | view |
| 13 | x 2 | src/cfn-custom-resources/lambda-code-updatesrc/cfn-custom-resources/us-east-1-lambda-stack | https.tshttps.ts |
7:23 7:23 | view |
| 6 | x 7 | src/cfn-custom-resources/user-pool-domainsrc/cfn-custom-resources/client-secret-retrievalsrc/cfn-custom-resources/static-sitesrc/cfn-custom-resources/generate-secretsrc/cfn-custom-resources/lambda-code-updatesrc/cfn-custom-resources/react-appsrc/cfn-custom-resources/user-pool-client | index.tsindex.tsindex.tsindex.tsindex.tsindex.tsindex.ts |
72:78 63:69 67:73 40:46 98:104 138:144 247:253 | view |