Build Fails Due to Dependency Version Mismatch

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Description

While reproducing the project, we found that the build process fails due to mismatched or unresolved dependencies.

The following error log was produced during the build process:

......
go: github.com/zupzup/casbin-http-role-example imports

github.com/alexedwards/scs/engine/memstore: module github.com/alexedwards/scs@latest found (v1.4.1), but does not contain package github.com/alexedwards/scs/engine/memstore

go: github.com/zupzup/casbin-http-role-example imports

github.com/alexedwards/scs/session: module github.com/alexedwards/scs@latest found (v1.4.1), but does not contain package github.com/alexedwards/scs/session

Result

The build fails with errors related to missing or mismatched dependencies.

The error dependency is github.com/alexedwards/scs.

The build process automatically pulls the latest dependency versions by default. However, the required package github.com/alexedwards/scs/session is not included in version v1.4.1.

Reason

This issue appears to be caused by the absence of precise version tracking in GOPATH, which leads to inconsistency in dependency resolution.

Proposed Solution

To resolve this issue, we analyzed the project and identified the correct versions of the required dependencies.

The analysis shows that the correct version for the dependency github.com/alexedwards/scs is v0.1.1.

Consider adopting this suggested version to prevent other developers from encountering build failures when constructing the project.

This information can be documented in the README.md file or another relevant location.

Additional Suggestions

To ensure reproducible builds and align with the evolving trends of the Go programming language, it is recommended that the current project be migrated to the Go module mechanism.

Updating to the go module mechanism allows for managing third-party dependency versions through the go.mod file, which provides a centralized and consistent way to specify dependency constraints.

We have generated a go.mod file with the correct versions of the third-party dependencies needed for this project.

The suggested go.mod file is as follows:

Go module github.com/zupzup/casbin-http-role-example

  

go 1.23.4

  

require (

github.com/alexedwards/scs v0.1.1

github.com/casbin/casbin v1.9.1

)

  

require (

github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible // indirect

github.com/patrickmn/go-cache v2.1.0+incompatible // indirect

)

Here the +incompatible suffix in go.mod indicates that the module does not follow Go Modules' semantic versioning rules correctly. But Go can still build and run the project normally despite the +incompatible tag.

Additional Information:

This issue was identified as part of our research project focused on automating the analysis of GOPATH projects to provide accurate dependency versions for seamless migration to Go Modules.

We value your feedback and would appreciate any comments or suggestions regarding this approach.

[back678]

Looking forward to your response!

Could we update README.md to help other developers use the Go module to build the projects or submit pull requests with go.mod to apply our suggestions? @zupzup