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sec(ci): select ECR repos to destroy by exact name, not substring - #1815
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Pro Run ID: 📒 Files selected for processing (4)
Included review availability: 1 review is currently available. Based on recent review activity, included reviews refill at 4 per hour. 📝 WalkthroughWalkthroughThe change adds an exact-match ECR repository selector, updates development cleanup to use it, adds selector tests, and requires those tests for CI success. ChangesECR cleanup hardening
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The PR changes ECR cleanup to delete only the exact repository owned by the environment and adds focused positive and negative tests, but the test setup can pass without proving that the deletion step uses the selector, leaving a bounded regression risk that should remain explicit to the owner. Possibly related issues
Sequence Diagram(s)sequenceDiagram
participant DestroyWorkflow
participant Terraform
participant ECR
participant Selector
Terraform-->>DestroyWorkflow: provide owned repository
DestroyWorkflow->>ECR: list account repositories
ECR-->>DestroyWorkflow: return repository names
DestroyWorkflow->>Selector: filter names by exact match
Selector-->>DestroyWorkflow: return selected repository names
DestroyWorkflow->>ECR: force-delete selected repositories
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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cristim
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…selection Follow-ups from the adversarial review of #1815. `terraform output -raw` exits 0 on a state with no outputs and writes its "No outputs found" warning to stdout, so the owned repository name became that warning text. The selector's whitespace guard caught it and the step failed, which is fail-closed but meant that re-dispatching the destroy after a completed one hard-failed before `terraform destroy` ever ran. Read the name through `output -json` instead: `{}` means the stack is already destroyed and the ECR cleanup is skipped, while a state that has outputs but not `ecr_repository_name` still fails loudly through `jq -e`. `while IFS= read -r` drops a final line with no trailing newline, so the owned repository could arrive last in an unterminated listing and be silently left behind. The suite could not see this because `<<<` always appends a newline; the new cases feed stdin through printf. An empty selection now names what was looked for on stderr, so "already deleted" is distinguishable from a listing taken from the wrong region or account. The exit code is unchanged. The suite also asserts that destroy-fargate-dev.yml still pipes ECR deletion through the selector. Every other case exercises the script standalone, so deleting the pipe stage left CI green while the #1592 over-match returned.
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In `@scripts/test-select-ecr-repos-to-delete.sh`:
- Around line 187-201: Update the wiring assertion around CONSUMER so it
inspects only the named “Force-delete ECR repo” workflow step and requires that
step to contain the selector invocation with its "$OWNED_REPO" argument together
with the aws ecr delete-repository command. Do not allow an unrelated selector
pipe elsewhere in destroy-fargate-dev.yml to satisfy the check.
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📒 Files selected for processing (3)
.github/workflows/destroy-fargate-dev.ymlscripts/select-ecr-repos-to-delete.shscripts/test-select-ecr-repos-to-delete.sh
🚧 Files skipped from review as they are similar to previous changes (2)
- .github/workflows/destroy-fargate-dev.yml
- scripts/select-ecr-repos-to-delete.sh
destroy-fargate-dev.yml selected repositories to force-delete with `contains(repositoryName,'cudly-dev')` and piped the result straight into `aws ecr delete-repository --force`. A substring match, so any repository whose name merely contained `cudly-dev` was destroyed with every image in it: `backup-cudly-dev`, `prod-cudly-dev-archive`, `cudly-dev-prod-mirror`. The repository the dev stack actually owns is `local.stack_name`, which carries a `random_id` suffix, so it cannot be pinned by a literal list and no prefix describes it uniquely: `cudly-dev-<hex>-backup` shares every prefix the real repository has. The name is therefore read from `terraform output -raw ecr_repository_name`, i.e. from the state the destroy is about to tear down, and compared for byte equality against the account listing. The comparison lives in scripts/select-ecr-repos-to-delete.sh so it can be tested. scripts/test-select-ecr-repos-to-delete.sh asserts both directions over a table of real and adversarial names, because a selector that matches nothing passes every "no longer over-matches" assertion while leaving the dev repository behind. A new `ecr-delete-selection` CI job runs those tests and gates ci-success. A failed `terraform output` hands the selector an empty name; that exits 2 rather than degrading into an empty or unbounded selection, and the step no longer swallows delete failures with `2>/dev/null || echo`. Closes #1592
…selection Follow-ups from the adversarial review of #1815. `terraform output -raw` exits 0 on a state with no outputs and writes its "No outputs found" warning to stdout, so the owned repository name became that warning text. The selector's whitespace guard caught it and the step failed, which is fail-closed but meant that re-dispatching the destroy after a completed one hard-failed before `terraform destroy` ever ran. Read the name through `output -json` instead: `{}` means the stack is already destroyed and the ECR cleanup is skipped, while a state that has outputs but not `ecr_repository_name` still fails loudly through `jq -e`. `while IFS= read -r` drops a final line with no trailing newline, so the owned repository could arrive last in an unterminated listing and be silently left behind. The suite could not see this because `<<<` always appends a newline; the new cases feed stdin through printf. An empty selection now names what was looked for on stderr, so "already deleted" is distinguishable from a listing taken from the wrong region or account. The exit code is unchanged. The suite also asserts that destroy-fargate-dev.yml still pipes ECR deletion through the selector. Every other case exercises the script standalone, so deleting the pipe stage left CI green while the #1592 over-match returned.
The check accepted a selector pipe anywhere in destroy-fargate-dev.yml, so an unrelated line elsewhere in the file could keep it green after the `Force-delete ECR repo` step lost its selector stage or its `"$OWNED_REPO"` argument. Asserting that a string is present somewhere is not asserting that it is wired where it matters, which is the same mistake the selector itself exists to remove. Require the selector invocation, its argument and `aws ecr delete-repository` to all appear inside the one named step. The step name is a variable so the regex and both messages cannot drift apart. The awk regexes use `[|]` and `[$]` rather than `\|` and `\$`, which are undefined escapes in POSIX ERE; the suite is verified under mawk 1.3.4 on ubuntu:24.04, the awk CI actually runs.
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@coderabbitai full review Requesting a full review rather than an incremental one: the previous attempt on this PR was rate-limited, so there is no verdict against the current head. Since your last review of this branch, two things changed. The wiring assertion you flagged has been scoped to the CI is green on |
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🧠 Learnings used✅ Action performedFull review finished. |
cristim
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Aug 18, 2026
cleanup-staging.yml's two AWS jobs selected repositories to force-delete by the `cudly-staging*` prefix, the shape #1592 rejected and #1815 removed from destroy-fargate-dev.yml. The prefix also matches `cudly-staging-prod-mirror`, `cudly-staging-<hex>-backup` and any other repository an operator names with it, and the workflow force-deleted every image in them. It spans both staging states as well: the lambda and fargate jobs each create their own `cudly-staging-<random_id.suffix.hex>` repository, so either job deleted the other's. Both steps now resolve the owned name from the state they are about to tear down (`terraform output -json`, so an already-destroyed state is `{}` and skips cleanly rather than turning a "No outputs found" warning into the name) and pipe the account listing through scripts/select-ecr-repos-to-delete.sh, which compares by exact equality and exits 2 on a name it cannot trust. Failures are no longer swallowed. `2>/dev/null || echo "may already be gone"` reported success after a failed listing or a failed delete, and a failed listing is indistinguishable from an empty account, so the cleanup did nothing and `terraform destroy` then failed on the images still present. "Already gone" needs no swallowing: the repository is absent from the listing, the selector prints nothing and exits 0, and the loop body never runs. The selector suite grows staging cases in both directions, including that neither staging state selects the other's repository, and its wiring assertion becomes a reusable per-step check with an expected step count (a file with two delete steps passes per-file flags when only one keeps the selector). A sweep keyed on `aws ecr delete-repository` rather than on step names covers the sites nobody has named yet, which is how #1820 outlived #1592. Closes #1820
This was referenced Aug 18, 2026
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What
destroy-fargate-dev.ymlchose which ECR repositories to force-delete withcontains(repositoryName,'cudly-dev')and piped the result straight intoaws ecr delete-repository --force. Being a substring match, it destroyed anyrepository whose name merely contained
cudly-dev, along with every image init, in whatever account
AWS_ROLE_TO_ASSUMEpoints at:backup-cudly-dev,prod-cudly-dev-archive,cudly-dev-prod-mirror.Why not a literal list or a prefix
The issue's remedy asked for an exact-name list. An exact comparison is what
landed, but the names cannot be hardcoded: the repository is
local.stack_name(
terraform/environments/aws/main.tf:55), which carries arandom_idsuffix.For the same reason no prefix describes it uniquely, since
cudly-dev-<hex>-backupshares every prefix the real repository has. Astarts_withguard or thecase cudly-dev*allow-list shape used bycleanup-staging.ymlstill selectscudly-dev-prod-mirror, which is thecounterexample in the issue's own failure scenario.
So the owned name is read from
terraform output -raw ecr_repository_name,i.e. from the state the destroy is about to tear down, and compared for byte
equality against the account listing.
Shape
scripts/select-ecr-repos-to-delete.shholds the comparison, so it istestable outside a destroy run. It exits 2 on an empty or whitespace-bearing
owned name, which is what a failed
terraform outputlooks like, rather thandegrading into an empty or unbounded selection.
scripts/test-select-ecr-repos-to-delete.shasserts both directions overa table of real and adversarial names. Both matter, because a selector that
matches nothing passes every "no longer over-matches" assertion while quietly
leaving the dev repository behind for the next
terraform destroyto fail on.ecr-delete-selectionjob inci.ymlruns those tests and is listed inci-success'sneeds.2>/dev/null || echo.Verification
bash scripts/test-select-ecr-repos-to-delete.shpasses 21/21. The suite wasthen run against three mutations of the selector to prove it is not vacuous:
contains(the shipped bug)backup-cudly-dev,cudly-dev-prod-mirror,prod-cudly-dev-archive,my-cudly-dev-clonestarts_with $owned(the rejected prefix remedy)cudly-dev-<hex>-backupThe selector was restored by inverse edit and the working tree verified clean
against the commit.
shellcheckclean on both scripts,bash -nclean, andboth workflow files parse as YAML.
Scope
Issue #1592 reports two defects. The unconditional state-lock delete and the
missing
concurrency:group were already fixed onmainby #1806; only theECR selection remained open, and that is what this PR closes.
Not addressed here, flagged as follow-ups rather than widened into this PR:
destroy-fargate-dev.yml:156selects RDS instances to strip deletionprotection from with
starts_with(DBInstanceIdentifier,'cudly-dev'), the sameclass of over-matching on a different resource.
cleanup-staging.ymlstill uses thecase "$REPO" in cudly-staging*)prefix allow-list and could adopt this selector.
Closes #1592
Summary by CodeRabbit
Bug Fixes
Tests