ROX-37174: Replace custom logger with slog-based implementation

[mclasmeier]

Summary

• Replace hand-rolled logger with log/slog: The new implementation uses a custom slog.Handler that preserves roxie's CLI output style (elapsed MM:SS timestamps, per-level coloring, stdout/stderr routing) while delegating level filtering, concurrency safety, and message dispatch to the standard library.
• Eliminate *logger.Logger parameter threading: Logger is now a package-level singleton (logger.Default()) with top-level functions (logger.Info, logger.Debug, etc.). This removes verbose and logger fields from Deployer and every other struct that carried them, and drops the logger parameter from ~30 function signatures across all packages.
• Replace if verbose guards with Debug/Debugf: Verbose-only output previously required callers to check if d.verbose { d.logger.Dim(...) }. Now callers just call logger.Debug(...) — level filtering happens inside slog. This collapses dozens of 3-line if-blocks into single calls.
• Add DebugMultilineYaml: Absorbs the removed helpers.LogMultilineYaml utility into the logger, with a built-in verbose guard so callers never need to check.
• Verbose flag handled via PersistentPreRunE: Cobra root command sets logger.SetVerbose() once; individual commands no longer wire it through.

Test plan

• make test — unit tests pass
• make check — fmt, vet, lint clean
• Manual: roxie deploy on a Kind cluster — verify output format unchanged (timestamps, colors, levels)
• Manual: roxie deploy --verbose — verify debug lines appear
• Manual: roxie teardown — verify teardown logs look correct

Summary by CodeRabbit

• Improvements
  • Logging is now managed consistently across deployment, teardown, cluster setup, and image and chart operations.
  • Verbose mode controls additional diagnostic output, while debug messages are available for troubleshooting.

[coderabbitai]

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📝 Walkthrough

Walkthrough

The pull request replaces injected logger instances with a package-level default logger across command and internal APIs. It adds slog-based logging with verbose debug output. Helm operations now accept contexts directly and pass them through retry and action flows.

Changes

Logging and Context API Migration

Layer / File(s)	Summary
Default logger and logging handler internal/logger/*	Adds a replaceable process-wide default logger, package-level logging functions, verbose and debug methods, and a synchronized slog handler with configurable output writers.
Logger-free helper and runtime APIs internal/containerrt/*, internal/dockerauth/*, internal/env/*, internal/helpers/*, internal/imagecache/*, internal/k8s/*, internal/manifest/*, internal/ocihelper/*, internal/portforward/*	Removes logger parameters and stored logger fields from supporting APIs. Updates associated tests to call the revised signatures.
Context-based Helm operations internal/helm/*, tests/e2e/*	Helm lifecycle functions now accept contexts and pass them through actions and retry waits. Integration and end-to-end helpers pass contexts directly.
Deployer and add-on logging internal/deployer/*	Replaces deployer and add-on logger configuration with package-level logging. Removes Deployer.SetVerbose and AddOnConfig; deployment and teardown control flow remains in place.
Command and test wiring cmd/*	Updates command handlers to call logger-free APIs. The root command applies the verbose flag to the package logger before command execution. Deployment configuration diagnostics use debug logging.

Priority: ⬇️ Low

Estimated code review effort: 4 (Complex) | ~50 minutes

Change: Refactor

Merge Risk: 🔵 Low · up to b0d2c

The logging migration mostly preserves existing behavior. A stalled Helm uninstall or list request may not stop when the operation is cancelled. Verbose SecuredCluster output is also formatted inconsistently, with a timestamp on its first line only. Both are bounded follow-ups rather than likely deployment failures.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 25.40% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 126 functions across 49 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: replacing the custom logger with a slog-based implementation.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[coderabbitai]

Actionable comments posted: 3

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @internal/deployer/deploy_via_operator.go:
- Line 940: Replace the single-line `log.Debug(string(yamlData))` call with
`DebugMultilineYaml(cr)` so each line of the SecuredCluster YAML receives its
elapsed timestamp, matching the Central CR logging path.

Review comments at @internal/helm/helm.go:
- Line 230: Update newActionConfig and the doUninstall and doListByPrefix call
paths so active Kubernetes requests honor the caller’s context or a
context-derived request timeout; cancellation must stop in-flight requests, not
only be checked between retries.

Review comments at @internal/logger/default.go:
- Line 16: Update SetDefault to reject a nil logger or substitute a usable
logger before storing it in std, so package-level log calls cannot dereference
nil; preserve its existing return behavior for non-nil loggers.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: Repository: stackrox/roxie/.coderabbit.yml
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📥 Commits

Reviewing files that changed from the base of the PR and between dfa8423 and b0d2c77.

📒 Files selected for processing (50)

• cmd/config.go
• cmd/deploy.go
• cmd/deploy_test.go
• cmd/env.go
• cmd/main.go
• cmd/shell.go
• cmd/subshell.go
• cmd/teardown.go
• internal/containerrt/containerrt.go
• internal/deployer/addons.go
• internal/deployer/addons_helm_chart.go
• internal/deployer/addons_stackrox_helm_chart.go
• internal/deployer/addons_test.go
• internal/deployer/crs.go
• internal/deployer/deploy_via_operator.go
• internal/deployer/deployer.go
• internal/deployer/kubectl.go
• internal/deployer/local_images.go
• internal/deployer/local_images_custom.go
• internal/deployer/local_images_generic.go
• internal/deployer/local_images_kind.go
• internal/deployer/local_images_minikube.go
• internal/deployer/operator.go
• internal/deployer/operator_integration_test.go
• internal/deployer/operator_olm.go
• internal/dockerauth/dockerauth.go
• internal/dockerauth/dockerauth_test.go
• internal/env/env.go
• internal/env/env_integration_test.go
• internal/helm/helm.go
• internal/helm/helm_integration_test.go
• internal/helpers/helpers.go
• internal/helpers/tag.go
• internal/helpers/tag_integration_test.go
• internal/imagecache/imagecache.go
• internal/imagecache/imagecache_test.go
• internal/k8s/kubectl.go
• internal/k8s/resource.go
• internal/k8s/resource_integration_test.go
• internal/logger/default.go
• internal/logger/logger.go
• internal/manifest/manifest.go
• internal/manifest/manifest_integration_test.go
• internal/ocihelper/ocihelper.go
• internal/ocihelper/ocihelper_integration_test.go
• internal/portforward/portforward.go
• tests/e2e/addons_test.go
• tests/e2e/e2e_test.go
• tests/e2e/helpers.go
• tests/e2e/mixed_versions_test.go

💤 Files with no reviewable changes (1)

• internal/helpers/helpers.go

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[porridge]

❤️ I like the reduction in LoC

[mclasmeier]

@porridge Minor follow-up fixes plus additional unit tests.