feat: ask for confirmation before teardown

[Molter73]

This is a small change that asks the user before the teardown command goes through in interactive shells, intended to help prevent situations where something is accidentally teardown from unintended inertia or when working with multiple clusters. A -f, --force flag is added to the teardown command to skip the prompt altogether.

Example output:

00:00 Using kubeconfig /home/mmoltras/.config/kube.yml
00:00 About to teardown Central, Secured Cluster, and Operator on kind-kind, continue? [y/N]
n
00:10 Aborting teardown

This change could also be expanded to skip the check on well known debug contexts like the teardown script from our workflow repo does, but I think I prefer it the way it is now: https://github.com/stackrox/workflow/blob/4e8520b1111738a47ddc7b0a2232a9e1eb4ebf1c/lib/common.sh#L134-L159

Tests

Decline teardown

Garbage answer

Implicit decline

Accept teardown and force flag

Cancel via ctrl+d

Teardown from non-interactive terminal

Summary by CodeRabbit

• New Features
  • Teardown now asks for confirmation before proceeding in interactive runs, helping prevent accidental removal of selected components.
  • Use the force option to skip the confirmation prompt. Non-interactive runs also continue without prompting.
  • If you decline, teardown is canceled. If confirmation input cannot be read, the error is reported and teardown does not proceed.

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• internal/helpers/helpers.go

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📝 Walkthrough

The teardown command adds a force flag and prompts for confirmation before teardown when execution is interactive and force is disabled. The new helper accepts trimmed, case-insensitive “y” or “yes” responses.

Changes: Teardown confirmation

Layer / File(s)	Summary
Add and apply teardown confirmation internal/helpers/helpers.go, cmd/teardown.go	WaitForConfirmation prints a prompt and reads one line from standard input. It returns true only for “y” or “yes”, ignoring case and surrounding whitespace. The teardown command adds -f/--force to skip the prompt. When confirmation is declined, it logs an abort and returns; confirmation errors are returned.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  actor User
  participant TeardownCommand
  participant WaitForConfirmation
  participant StandardInput
  TeardownCommand->>WaitForConfirmation: Request confirmation when interactive and not forced
  WaitForConfirmation-->>User: Print confirmation prompt
  User->>StandardInput: Enter response
  WaitForConfirmation->>StandardInput: Read response
  StandardInput-->>WaitForConfirmation: Return input or read error
  WaitForConfirmation-->>TeardownCommand: Return confirmation result or error
  alt Confirmation declined
    TeardownCommand-->>User: Log abort and return
  else Confirmation accepted
    TeardownCommand->>TeardownCommand: Proceed with teardown
  end

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Suggested reviewers: mclasmeier

Merge Risk: ⚪ Minimal · up to ab8d5

Interactive teardown now requires confirmation unless --force is used, and declining or failing to answer stops teardown. No concrete merge-blocking issue remains.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: adding a confirmation prompt before teardown.

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Actionable comments posted: 2

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• 🪄 Fix comments: Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @cmd/teardown.go:
- Line 60: Update the confirmation gate in the teardown flow to require both
stdin and stderr to be terminals, without relying on env.RunningInteractively,
which also checks stdout; bypass the prompt when stderr is redirected. Ensure
the confirmation prompt is written to stderr so stdout redirection does not
suppress an otherwise interactive confirmation.

Review comments at @internal/helpers/helpers.go:
- Around line 164-165: Update the confirmation prompt’s ReadString error
handling to return false, nil for io.EOF, treating terminal EOF as a declined
confirmation; preserve the existing error return for all other read errors.

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📥 Commits

Reviewing files that changed from the base of the PR and between 1773975 and 764225d.

📒 Files selected for processing: 2

• cmd/teardown.go
• internal/helpers/helpers.go

Included review availability: This review used your included allowance. Your plan provides up to 12 included reviews per hour; 11 remain after this review.