some error checks added (static checks)

[abohoss]

Description

This PR fixes #784

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

[gemini-code-assist]

Summary of Changes

Hello @abohoss, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request primarily focuses on enhancing the robustness of the codebase by introducing additional error checks. Specifically, it addresses potential issues in file reading and copying operations, ensuring that errors are properly caught and handled, which helps fix issue #784.

Highlights

• Error Handling in Helm Test Converter: Improved error handling when extracting manifests from Helm charts by adding a check for io.Copy operations.
• Error Handling in GitHub URL Generator: Enhanced error handling during file content retrieval from GitHub URLs by adding a check for os.ReadFile operations.

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[gemini-code-assist]

Code Review

This pull request addresses missing error checks identified by static analysis. The changes correctly add error handling for io.Copy in converter/tests/helm_test.go and for os.ReadFile in generators/github/url.go, preventing potential panics and silent failures. The added error handling is idiomatic and improves the robustness of the code.

While reviewing, I noticed a couple of other places in generators/github/url.go where errors are still ignored: the result of os.Create on line 45, and the error from w.Flush() in the deferred function on line 51. Since this PR is focused on improving error handling, it would be great if you could address these as well to make the function fully robust.

[vr-varad]

Thank you @abohoss for your contribution!!
If this work is complete, this is a good item to add to the weekly Meshery Development meeting agenda. You can add this item in the doc, attend, and present it. Meeting details at https://meet.layer5.io/meshery.