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fix(aspire): detach kept resources from removed resources in ResourcesToRemove - #7295
ResourcesToRemove() only called builder.Resources.Remove(resource). Kept resources still held edges on the removed resource:
WaitFor(removed) kept its WaitAnnotation, so the kept resource stayed in Waiting until ResourceTimeout.
WithReference(removed) kept an environment callback that injects the removed resource's endpoints or connection string. Those values never resolve, so the kept resource failed to start.
Selective removal, such as dropping an optional dependency for some tests, did not work.
Fix
Resource removal moves to a new internal ResourceRemoval helper. After removing the named resources, it:
Removes children (IResourceWithParent) of removed resources, recursively, and logs each one.
Drops WaitAnnotations on kept resources that target a removed resource, and logs each one.
Drops EndpointReferenceAnnotations and ResourceRelationshipAnnotations that point at a removed resource.
Wraps each kept resource's environment and argument callbacks. After the original callback runs, the wrapper drops each value that references a removed resource, and logs each dropped variable. The check walks IValueWithReferences and checks ConnectionStringReference.Resource. It covers WithReference (service discovery, endpoints, connection strings) and endpoint values passed to WithEnvironment or WithArgs. These callbacks capture the removed resource in a closure, so annotation cleanup alone cannot reach them.
The issue proposed clearing the removed resource's EndpointAnnotations. That approach fixes service-discovery references but not connection-string references (for example a removed Redis or Postgres), which are the common case. The callback wrapper handles both.
The docs for ResourcesToRemove() now describe this behavior. They also correct the claim that unknown names are "silently ignored": unknown names are logged.
Tests
ResourceRemovalTests (no Docker): 7 tests that use a real DistributedApplication.CreateBuilder(), so the edges are the ones Aspire's own extension methods create. They cover wait edges, endpoint references, connection-string references, arguments, child cascading, kept references, and unknown names. With edge detaching disabled, 5 of the 7 fail.
ResourcesToRemoveTests (Docker): the fixture now adds optional-service and optional-db, makes api-service reference and wait on both, removes them, and waits for api-service. Without the fix, the fixture times out after 120s with api-service: Waiting, waiting on 'optional-service'. With the fix, all 3 tests pass in about 8s.
Removing a resource also removes its child resources and clears dependent waits and endpoint references from resources that remain. Environment variables and command-line arguments referencing removed resources are omitted; an option name is also omitted when its value is removed in the same argument configuration. Combined values that cannot be resolved are dropped whole, while arguments after -- are not paired with option names. Changes are shown in the fixture progress log.
Bug Fixes
Unknown resource names are logged and skipped without affecting existing resources or their dependencies.
Documentation
Clarified resource-removal behavior and the requirement that retained resources work without removed dependencies.
…sToRemove
ResourcesToRemove only removed the resource from the model. Kept resources
still held WaitFor annotations and WithReference environment callbacks that
point at it, so they waited forever or failed to resolve endpoints and
connection strings.
Removal now also removes children of removed resources, drops wait edges,
endpoint references and relationships on kept resources, and wraps their
environment and argument callbacks to drop values that reference a removed
resource. Each change is logged.
Fixes#7284
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Inline comments:
Review comments at @src/TUnit.Aspire.Core/ResourceRemoval.cs:
- Line 164: Update the argument-removal logic around `before.Contains` to track
option occurrences added by the current `WithArgs` callback by position, rather
than relying on object identity. When removing an endpoint, remove its
associated option occurrence without treating a later identical option string as
belonging to an earlier callback.
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src/TUnit.Aspire.Core/ResourceRemoval.cs
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Walkthrough
Resource removal now removes named resources and their descendants. It also clears references to removed resources from kept resources, including annotations, environment variables, and command-line arguments. Documentation and tests describe and verify these behaviors.
Changes: Aspire resource removal
Layer / File(s)
Summary
Select and remove resources src/TUnit.Aspire.Core/AspireFixture.cs, src/TUnit.Aspire.Core/ResourceRemoval.cs
RemoveResources delegates to ResourceRemoval.Remove. The implementation selects exact name matches, logs missing names, and removes selected resources and descendants.
Clean references on kept resources src/TUnit.Aspire.Core/ResourceRemoval.cs
The implementation removes matching wait, endpoint-reference, and relationship annotations. It wraps environment and command-line callbacks to filter values that reference removed resources. A matching argument can also remove its preceding option when both were added by the same callback and no -- separator precedes the option.
Document and verify removal behavior docs/docs/examples/aspire.md, src/TUnit.Aspire.Core/AspireFixture.cs, tests/TUnit.Aspire.Tests/ResourceRemovalTests.cs, tests/TUnit.Aspire.Tests/ResourcesToRemoveTests.cs
Documentation describes removal and callback behavior. Regression tests check cleanup, filtering, logging, and preservation of references to retained resources.
sequenceDiagram
participant AspireFixture
participant ResourceRemoval
participant AppModel
AspireFixture->>ResourceRemoval: delegate resource removal
ResourceRemoval->>AppModel: select and remove named resources and descendants
ResourceRemoval->>AppModel: remove annotations and wrap callbacks on kept resources
AppModel-->>ResourceRemoval: run wrapped environment and argument callbacks
ResourceRemoval-->>AppModel: filter values that reference removed resources
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Possibly related issues
The change addresses the issue where kept resources retain wait and reference edges to removed resources. It removes matching annotations and filters environment and argument values that reference removed resources.
Merge Risk: Low · previous review b26c2
Repeated options can produce incorrect startup arguments when a removed resource is referenced. This is a bounded issue to fix or explicitly accept before merging.
Pre-merge checks: 4 · 1
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Title check
The title clearly and concisely describes the primary change: detaching kept resources from resources removed by ResourcesToRemove.
Linked Issues check
Issue #7284 requires that a kept resource start when it waits for or references a removed resource. The reviewed head implements this in src/TUnit.Aspire.Core/ResourceRemoval.cs. Remove() deletes the …
Out of Scope Changes check
All changes support the selective-removal behavior in #7284. ResourceRemoval.cs handles wait edges, endpoint and relationship annotations, and environment and argument callbacks that capture a removed…
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Explanation
Issue #7284 requires that a kept resource start when it waits for or references a removed resource. The reviewed head implements this in src/TUnit.Aspire.Core/ResourceRemoval.cs. Remove() deletes the named resources and their orphaned children. DetachEdges() then drops WaitAnnotation, EndpointReferenceAnnotation, and ResourceRelationshipAnnotation entries that target a removed resource. It also wraps EnvironmentCallbackAnnotation and CommandLineArgsCallbackAnnotation. After each original callback runs, the wrapper drops values that reference a removed resource, including ConnectionStringReference values, and logs each drop. Unknown names are logged as skipped. The changes since the previous review refine argument filtering. The head code now identifies arguments added by the same callback by object identity, and it pairs a dropped option name only with a value that callback added. The test file at head covers these cases. Remove_KeepsEarlierFlagWhenLaterCallbackReplacesAnArgument and Remove_PairsOptionAndValueInRebuiltArguments check the new behavior. Remove_DropsConnectionStringEnvironment covers one kept resource that both references and waits on a removed resource, as the issue requests. The issue proposes clearing the removed resource's EndpointAnnotations. The PR uses a different mechanism, which the issue text presents as a proposal. The stated requirement is that kept resources start without the removed edges, and the code and tests at head establish this. The incremental diff could not be read because changed blobs were missing from the checkout. This assessment therefore relies on the full head versions of ResourceRemoval.cs and ResourceRemovalTests.cs. The Docker fixture change in ResourcesToRemoveTests.cs was not re-verified at this head.
Full details: Out of Scope Changes check
Explanation
All changes support the selective-removal behavior in #7284. ResourceRemoval.cs handles wait edges, endpoint and relationship annotations, and environment and argument callbacks that capture a removed resource. It also removes children of a removed parent, which prevents orphaned resources from failing without their parent. The argument-pairing logic exists because dropping a value that follows a bare option name would leave the option to consume the next argument. That behavior is part of the same reference-removal requirement. The AspireFixture.cs change delegates removal to ResourceRemoval and documents the ordering after ConfigureBuilder. The docs change describes the new behavior and the corrected unknown-name logging. The tests cover the new behavior. The intermittent ResourceStartupWaiterTests failure is tracked in #7294 and is not part of this diff. No unrelated product change is established from the evidence available at head.
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Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 10 functions across 4 files.
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A rabbit checks the resource list, Removed roots take their children too. Waits and references leave the path, Arguments lose their paired flags. The progress log records each change, Kept resources hop on free.
Comment @coderabbitai help to get the list of available commands.
I found no blocking issues. This is a good fix for #7284.
What I like
The change closes the whole gap. It drops WaitAnnotations, endpoint and relationship annotations, and the WithReference callbacks that capture the removed resource in a closure. Cascading removal to IResourceWithParent children, repeated until stable, covers grandchildren too.
Wrapping the callbacks is a better approach than the issue's proposal of clearing EndpointAnnotations, because it also handles connection-string references, which are the common case.
Moving the logic into an internal ResourceRemoval helper keeps AspireFixture small and makes the logic testable without Docker. The tests use a real DistributedApplication.CreateBuilder(), so the edges are the ones Aspire itself creates.
Each dropped item is logged, and the docs now describe the behavior. The correction that unknown names are logged, not silently ignored, is accurate.
Non-blocking suggestions
Partial references.ReferencesRemoved drops an environment variable or argument if any referenced value is a removed resource. For a ReferenceExpression that mixes a kept and a removed resource, such as $"{kept}/{removed}", the whole value is dropped. That is probably the right choice, since the value can't resolve. The docs could say it explicitly, and a test for the mixed case would pin it down.
Wrapping makes the callbacks opaque. The wrapped callbacks replace the original annotation instances. A user-supplied ConfigureBuilder that runs after removal and inspects or replaces those annotations would see the wrappers. This doesn't seem to matter today, because removal runs just before the app is built. A short comment next to RemoveResources saying it must be the last builder mutation would guard against reordering.
Logging in the args wrapper. The args-callback log message doesn't say which argument was dropped, unlike the environment-variable message, which names the key. Logging an index or the value's type would help debugging.
59-65: Trivial · Maintainability & Code Quality · Low value
Unverified finding
Verification ran but could not confirm this finding. It is shown for review, not as a verified issue.
Assert only waits on removed resources.
The test name says the kept resource has no wait on removed resources. The assertion requires api-service to have no WaitAnnotation at all. If the AppHost later adds a valid WaitFor on a kept resource, this test fails for an unrelated reason.
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Inline comments:
Review comments at @src/TUnit.Aspire.Core/ResourceRemoval.cs:
- Around line 87-90: In the annotation-removal switch, update the
EndpointReferenceAnnotation and ResourceRelationshipAnnotation cases to use
separate case sections and log each dropped annotation through log, identifying
the removed resource and the resource whose annotations are being processed.
Preserve the existing removal condition and annotations.RemoveAt behavior.
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Address review on #7295: dropping only the value of '--name value' made the
next argument the option's value. Also log which argument was dropped, add a
mixed kept/removed reference test, and document both behaviours.
Partial references. A value that mixes kept and removed references is dropped whole. This is now documented, and Remove_DropsWholeValueThatMixesKeptAndRemovedReferences covers it.
Ordering. Added a comment at the RemoveResources call site. It must run after ConfigureBuilder, and environment or args callbacks added after it are not filtered. The OTLP callbacks added later never reference removed resources.
Args logging. The message now names the dropped option (dropped argument '--optional-url' and its value ...) or gives the argument's index. This came with the Greptile fix, which also drops the option name paired with a removed value.
Overall this is a well-scoped fix. Moving removal into a dedicated ResourceRemoval helper is cleaner than inlining it in the fixture, and it can be tested without Docker. Cascading removal to children is correct. Wrapping the callbacks is a sound answer to the closure-capture problem, and your PR description explains well why clearing EndpointAnnotations would not be enough. The tests use a real DistributedApplication.CreateBuilder(), so they cover the edges Aspire actually creates, and the Docker fixture reproduces the original timeout. I found no blocking issues.
Suggestions to consider:
Option-name pairing heuristic in WrapArgsCallback.IsOptionName(previous) drops the previous argument whenever it is a bare -x or --x string. This is wrong for a boolean flag followed by a positional argument that references a removed resource. For example, --verbose followed by a removed endpoint would also drop --verbose, and the log would say the flag's value was dropped. The docs state the heuristic, so this is a documented trade-off rather than a bug. Even so, the failure is silent apart from the log line. Consider limiting the pairing to cases where it is more certain, or noting in the docs that flags directly before a removed value are dropped too.
Callbacks added after removal are not filtered. The code comment says this, and RemoveResources runs after ConfigureBuilder, which covers the usual cases. Callbacks added later, such as the OTLP configuration or other post-removal wiring, are not wrapped. If any of them can reference a user-removed resource, a different design is safer. Apply the filter at resolution time, for example by wrapping once more in InitializeCoreAsync just before BuildAsync, instead of relying on ordering.
Mutating annotations[i] while iterating backwards. This works with the indexer setter. A short comment saying that replacement is intentional and order-preserving would help, because callback order affects the env/args result.
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Inline comments:
Review comments at @src/TUnit.Aspire.Core/ResourceRemoval.cs:
- Line 154: Update the argument-removal condition using IsOptionName so dropping
a positional argument does not also remove a preceding token based only on its
option-like syntax. Preserve standalone flags and the -- separator unless the
argument list establishes that the preceding option consumes the removed value.
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docs/docs/examples/aspire.md
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src/TUnit.Aspire.Core/ResourceRemoval.cs
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Address review on #7295: never pair a removed value with '--' or with
arguments after it, only pair an option with a value added by the same
WithArgs callback, and log dropped endpoint-reference and relationship
annotations.
Solid fix for #7284. Moving removal into ResourceRemoval is a clean split, and the new tests use a real DistributedApplication.CreateBuilder(), so they exercise the edges Aspire's own extension methods create. I checked the diff and found no blocking issues.
Things I checked and found fine:
Children are removed transitively, and the loop repeats until nothing more is added.
WaitAnnotation, EndpointReferenceAnnotation and ResourceRelationshipAnnotation are dropped with a reverse index loop, so RemoveAt is safe.
Wrapping the environment and argument callbacks is the right way to reach closure-captured references. Clearing EndpointAnnotations, as the issue proposed, would not cover connection strings.
ReferencesRemoved stops at kept resources and has a depth bound.
Non-blocking suggestions:
Argument pairing heuristic.IsOptionName and HasSeparatorBefore guess that --flag followed by a dropped value belongs together. A standalone flag that happens to sit before a referenced value will also be dropped. You document this, and the workaround of adding the flag in a separate WithArgs call is reasonable. The safer alternative is to drop only the referencing argument and leave the flag. Whether that is better depends on which failure is worse, so the current choice is defensible. I'd keep the doc note prominent.
Callbacks added after removal. Environment and argument callbacks registered after RemoveResources are not filtered. The comment in AspireFixture says so. Running removal last in InitializeCoreAsync would narrow that gap, but the OTLP configuration there probably doesn't reference removed resources, so this is fine as is.
Allocation. The wrapper allocates a List<string> only when something is dropped, which is good. If this ever shows up in profiles, short-circuiting when the removed set is empty already happens at the top of Remove.
Address review on #7295: a callback can clear or replace earlier arguments,
so a removed reference below the pre-callback count escaped filtering. The
callback boundary now only limits option pairing.
I couldn't run the automated code-review skill, so this is a manual read of the diff. I found no blocking issues.
What's good
Moving removal into an internal ResourceRemoval helper is a clean split. It can be tested against a real DistributedApplication.CreateBuilder() without Docker.
The behaviour is bounded and documented: recursion depth is capped, children are removed until stable, and every change is logged.
The docs fix is accurate. Unknown names were already logged, not silently ignored.
Observations, non-blocking
Late callbacks aren't filtered. Callbacks added after RemoveResources runs (for example by Aspire during build, or by later builder configuration) bypass the wrappers. The code comment and docs say so. A possible hardening is a single EnvironmentCallbackAnnotation appended last that does the filtering for all earlier output. Annotations run in order, so a trailing filter would see everything. That would avoid replacing annotations in place and would also cover callbacks added later, as long as they are appended before it. It would need the same treatment for the args callbacks.
Option-pairing heuristic for args. Dropping --name along with its value is a guess based on a leading -. A legitimate negative number such as -1 that precedes a dropped value could be misread as an option name. This is a rare edge case and documented behaviour, so I'd leave it. A short comment would help, or a test that pins the behaviour.
Wrapper allocations.ReferencesRemoved walks every env var and arg on each callback invocation. That is fine for tests, but you could skip wrapping resources that have no references to removed resources (a pre-scan of their annotations).
Tests cover the main paths, and the Docker-based regression test reproduces the original timeout. LGTM.
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Inline comments:
Review comments at @src/TUnit.Aspire.Core/ResourceRemoval.cs:
- Line 146: Update the argument-filtering logic around start and context.Args so
it recalculates the option boundary after a callback clears or rebuilds the
argument list; removing an endpoint reference must not leave an option such as
--url without its value. Add a test covering a rebuilt option/value pair.
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Fixes #7284.
Problem
ResourcesToRemove()only calledbuilder.Resources.Remove(resource). Kept resources still held edges on the removed resource:WaitFor(removed)kept itsWaitAnnotation, so the kept resource stayed inWaitinguntilResourceTimeout.WithReference(removed)kept an environment callback that injects the removed resource's endpoints or connection string. Those values never resolve, so the kept resource failed to start.Selective removal, such as dropping an optional dependency for some tests, did not work.
Fix
Resource removal moves to a new internal
ResourceRemovalhelper. After removing the named resources, it:IResourceWithParent) of removed resources, recursively, and logs each one.WaitAnnotations on kept resources that target a removed resource, and logs each one.EndpointReferenceAnnotations andResourceRelationshipAnnotations that point at a removed resource.IValueWithReferencesand checksConnectionStringReference.Resource. It coversWithReference(service discovery, endpoints, connection strings) and endpoint values passed toWithEnvironmentorWithArgs. These callbacks capture the removed resource in a closure, so annotation cleanup alone cannot reach them.The issue proposed clearing the removed resource's
EndpointAnnotations. That approach fixes service-discovery references but not connection-string references (for example a removed Redis or Postgres), which are the common case. The callback wrapper handles both.The docs for
ResourcesToRemove()now describe this behavior. They also correct the claim that unknown names are "silently ignored": unknown names are logged.Tests
ResourceRemovalTests(no Docker): 7 tests that use a realDistributedApplication.CreateBuilder(), so the edges are the ones Aspire's own extension methods create. They cover wait edges, endpoint references, connection-string references, arguments, child cascading, kept references, and unknown names. With edge detaching disabled, 5 of the 7 fail.ResourcesToRemoveTests(Docker): the fixture now addsoptional-serviceandoptional-db, makesapi-servicereference and wait on both, removes them, and waits forapi-service. Without the fix, the fixture times out after 120s withapi-service: Waiting, waiting on 'optional-service'. With the fix, all 3 tests pass in about 8s.TUnit.Aspire.Testsrun: 171/172 passed. The one failure wasResourceStartupWaiterTests.EveryExit_CancelsAndJoinsPendingWaits(cancellation, True), which is unrelated and intermittent (it passed in 3 reruns). Filed as Flaky: ResourceStartupWaiterTests.EveryExit_CancelsAndJoinsPendingWaits(cancellation, True) gets InvalidOperationException #7294.Summary by CodeRabbit
--are not paired with option names. Changes are shown in the fixture progress log.