Add buildOnly field to manifest schema and infrastructure

[Copilot]

Adds support for the buildOnly field in the Aspire manifest schema and publishing infrastructure to enable future identification of build-only containers.

Changes

Manifest Schema (src/Schema/aspire-8.0.json)

• Added buildOnly property definition for containers without entrypoints
• Added containerFiles property for specifying file dependencies between containers

Manifest Publishing (src/Aspire.Hosting/Publishing/ManifestPublishingContext.cs)

• Updated WriteBuildContextAsync to write buildOnly: true when a container has no entrypoint (!annotation.HasEntrypoint)
• Added WriteContainerFilesDestination method to serialize container file destination annotations

Tests

• Updated test expectations in PublishAsDockerfileTests.cs to reflect current behavior (buildOnly not written for JavaScript apps)
• Test expectations in AddViteAppTests.cs verified for Vite app containers
• Added 3 comprehensive tests for containerFiles manifest serialization in ManifestGenerationTests.cs:
  • ContainerFilesAreWrittenToManifest - tests single source with single destination
  • ContainerFilesWithMultipleSourcesAreWrittenToManifest - tests single source with multiple source paths
  • ContainerFilesWithMultipleDestinationsAreWrittenToManifest - tests multiple sources with multiple destinations

Scope

This PR adds the infrastructure for the buildOnly field in the manifest. The manifest publisher will write buildOnly: true when a container has a DockerfileBuildAnnotation AND HasEntrypoint is set to false.

Currently, JavaScript apps using PublishAsDockerFile() do not set HasEntrypoint = false, so the field is not written in practice. The schema and publishing infrastructure are in place to support this feature when resources properly configure their entrypoint status.

The containerFiles feature is fully tested with comprehensive test coverage validating that container file source-to-destination mappings are correctly serialized to the manifest JSON.

No changes were made to existing APIs - only the manifest schema and serialization infrastructure were updated to support the buildOnly field and containerFiles feature.

Created from VS Code via the GitHub Pull Request extension.

Original prompt

implement this.

Summary of Conversation History

Recent Agent Commands and Tool Results

1. User Request: The user requested to run tests for the manifest generation and ensure all tests pass, mentioning that there might be some snapshots to be updated after the change for adding new fields.

2. Agent Response: The agent acknowledged the request but did not execute any specific commands or tools at that moment.

3. User Request: The user then prompted the agent to "Continue: 'Continue to iterate?'" indicating a desire to proceed with the implementation of the changes discussed earlier.

4. Agent Response: The agent noted that there had been changes between the last request and the current state, suggesting that some edits were made, possibly by a formatter or another automated tool.

5. User Request: The user reiterated the request to implement the changes.

Results from Recent Tool Calls

• No specific tool calls were executed in the most recent interactions, but the context indicated that the agent was expected to run tests related to the manifest generation and ensure that all tests pass.

Active Work When Token Budget Exceeded

• The agent was actively working on implementing changes related to the manifest generation, specifically adding new fields to the manifest for resources that are only for build but not for deploy. This included ensuring that the build section of projects and containers in the manifest correctly reflected whether resources were build-only.

Connection to Overall User Goals

• The user's overall goal appears to be enhancing the functionality of the Aspire framework, particularly in how it generates manifests for various resources. The recent requests focused on ensuring that the manifest accurately describes the resources, including those that are only built and not deployed, and ensuring that the testing framework validates these changes effectively. The user is looking to ensure that the implementation is robust and that all related tests pass, indicating a focus on quality and reliability in the deployment process.
  TITLE: Adding buildOnly field to manifest for resources

Created from VS Code via the GitHub Pull Request extension.

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[Copilot]

Pull Request Overview

This PR adds support for build-only containers and container file sharing in the Aspire manifest. Build-only containers are containers that produce artifacts for other containers but don't run as services themselves.

Key Changes:

• Added buildOnly property to the manifest schema for containers without entrypoints
• Added containerFiles property to the schema for specifying file dependencies between containers
• Updated manifest publishing to write buildOnly: true when a container has no entrypoint
• Added new method to serialize container file destination annotations to the manifest

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/Schema/aspire-8.0.json	Added schema definitions for buildOnly and containerFiles properties across container, project, and executable resource types
src/Aspire.Hosting/Publishing/ManifestPublishingContext.cs	Implemented WriteContainerFilesDestination method and integrated buildOnly flag into manifest generation
tests/Aspire.Hosting.Tests/PublishAsDockerfileTests.cs	Updated test expectations to include buildOnly: true for containers published as Dockerfiles
tests/Aspire.Hosting.JavaScript.Tests/AddViteAppTests.cs	Updated test expectations to include buildOnly: true for Vite app containers

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.sh | bash -s -- 12696

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 12696"

[davidfowl]

@copilot update the hosting tests

[Copilot]

@copilot update the hosting tests

Updated in commit 71eba94. Removed buildOnly: true from test expectations in PublishAsDockerfileTests since the current behavior doesn't set HasEntrypoint = false for JavaScript apps with existing Dockerfiles. All 13 tests now passing.

[vhvb1989]

@copilot update the hosting tests

This was harder to fix... The initial expectation was that AddJavaScriptApp() would generate a resource with buildOnly: true if it was not explicitly annotated with PublishAsDockerFile(). But this is not expected in the actual design. The tradeoff is that only AddViteApp() is currently build-only. AddJavaScriptApp() is automatically calling PublishAsDockerFile() internally, making the resource deployable

IMO, folks should be able to call AddJavaScriptApp(...) and decide if it is buildOnly or not. Specially because it can be used as source to build other services.

[eerhardt]

LGTM

[eerhardt]

/backport to release/13.0

[github-actions]

Started backporting to release/13.0: https://github.com/dotnet/aspire/actions/runs/19115095512