feat: ✨ handle auth and errors better

[anthonyra]

TL;DR

Improved error handling and reliability in the Luet package management workflow.

What changed?

This PR significantly enhances error handling throughout the codebase:

• Replaced panic calls with proper error propagation
• Added retry mechanisms for network operations
• Improved Docker authentication handling for registry operations
• Added better error reporting with context about which operation failed
• Implemented proper cleanup of temporary directories
• Added support for authentication when downloading metadata
• Made command construction more maintainable with string slices
• Fixed potential resource leaks in worker goroutines
• Added detailed error reporting for parallel operations

How to test?

1. Run the tool with authentication credentials to verify registry access works
2. Test the build functionality with --push flag to verify image pushing
3. Test the download functionality with various repositories
4. Verify error messages are now more descriptive when operations fail
5. Test with intentionally invalid credentials to verify error handling

Why make this change?

The original code had several reliability issues that could cause silent failures or crashes. This refactoring makes the tool more robust when dealing with network issues, authentication problems, and concurrent operations. The improved error handling provides better diagnostics when things go wrong, making it easier to troubleshoot issues in CI/CD pipelines.

[anthonyra]

• feat: ✨ handle auth and errors better #1 👈 (View in Graphite)
• master

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