feat(cmd): handle ErrEnvNotExist with typed error checking

[intojhanurag]

Changes

• Introduced typed error ErrEnvNotExist to clearly indicate missing environment variables.
• Added error check in tests using errors.As to assert that the correct typed error is returned.
• Validates that the Name field in ErrEnvNotExist matches the expected missing environment variable.
• Improves test reliability and clarity for environment variable management.

[knative-prow]

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[knative-prow]

Hi @intojhanurag. Thanks for your PR.

I'm waiting for a github.com member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.21%. Comparing base (d3a783c) to head (167f5c7).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3126      +/-   ##
==========================================
+ Coverage   58.32%   60.21%   +1.88%     
==========================================
  Files         134      134              
  Lines       17369    13501    -3868     
==========================================
- Hits        10131     8130    -2001     
+ Misses       6300     4404    -1896     
- Partials      938      967      +29     

Flag	Coverage Δ
e2e-tests	41.68% <0.00%> (+2.76%)	⬆️
integration-tests	54.74% <100.00%> (+2.47%)	⬆️
unit-tests	46.78% <100.00%> (+0.56%)	⬆️

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[intojhanurag]

Hey @gauron99 , It is ready for review.

[gauron99]

there is a "etc" so I assume we need to do this for more errors

[intojhanurag]

I can add , but how will I know which ones are missing? Otherwise, I can keep this comment so that we can add more in the future.

[gauron99]

yeah lets add that comment back just in case, thanks

[intojhanurag]

Done !