devenv: fix building containers

[sandydoo]

When refactoring the container options, I moved around devenv.container_name which broke container builds. Instead of using the name from the command, it was always set to the legacy name option.

This bug was not released.

[claude]

Claude finished @sandydoo's task —— View job

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PR Review Complete

Reviewing the container build fix. Here's my comprehensive analysis:

• Read and analyze the changed files
• Review code quality and best practices
• Check for potential bugs or issues
• Assess performance considerations
• Review security concerns
• Evaluate test coverage
• Provide comprehensive feedback

Summary

The PR correctly fixes a bug where devenv.container_name was being set too early in the CLI handling code instead of within the actual container build method. This fix ensures the container name is properly passed to the Nix evaluation system.

Code Quality & Best Practices

Good:

• Clean separation of concerns - container name is now set where it's actually used
• Method signatures correctly changed from &self to &mut self to support the state mutation
• Clear comments explaining what the container name is used for

Could be improved:

• The container_name field in the Devenv struct is marked as // TODO: make private but remains public (devenv/src/devenv.rs:100)
• Consider extracting container name setting into a separate method to avoid duplication

Potential Issues

Method signature breaking change:
The change from &self to &mut self in container_build(), container_copy(), and container_run() is a breaking API change. However, this appears to be internal API used only by the CLI, so the impact should be minimal.

State consistency:
The container_name is set only in container_build() but used across all container methods. While the current code paths ensure container_build() is called before the others, this creates an implicit dependency that could be fragile.

Security Concerns

No security issues identified. The container name is properly sanitized using the existing sanitize_container_name() function.

Test Coverage

The fix is covered by existing integration tests in tests/cli/.test.sh:22-27 which test container build functionality. The tests validate both the new command structure and backward compatibility.

Performance Considerations

No performance impact - the change simply moves when a field is assigned.

Recommendations

1. Make container_name private: Address the TODO comment at devenv/src/devenv.rs:100 by making the field private and adding a setter method.

2. Add validation: Consider adding validation in the container methods to ensure container_name is set when needed:

   if self.container_name.is_none() {
       bail!("Container name not set - call container_build() first");
   }

3. Extract method: Consider creating a set_container_name() method to centralize the logic and avoid duplication if more container methods are added in the future.

The fix correctly addresses the reported issue and follows Rust best practices. The changes are minimal and focused, making them easy to review and maintain.

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