[CI] Fix Outerloop and Quarantine workflows

[radical]

[CI] Build only the relevant projects for Quarantined/Outerloop

.. workflows.

These workflows have been running out of space on github runners while
just building the solution, even though it is just the test projects.

What we really need is a few test projects with the relevant attribute
like [OuterloopTest("..")], and generate the runsheet for them. So we
add a new shell script which can find such projects, and then build
only those.

This makes it much faster too.

Fixes #13210 .

[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 -- 13218

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 13218"

[Copilot]

Pull request overview

This PR optimizes the Outerloop and Quarantine workflows to avoid disk space issues by building only test projects containing the relevant test attributes instead of building the entire solution. The optimization adds a new shell script to identify relevant test projects and passes them to the build system via MSBuild properties.

Key Changes:

• Introduces a new script to identify test projects containing specific attributes (QuarantinedTest/OuterloopTest)
• Modifies build system to accept custom project lists via BeforeBuildPropsPath
• Updates workflows to conditionally skip package builds when not needed

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
eng/scripts/generate-specialized-test-projects-list.sh	New script that scans for test files with specific attributes and generates MSBuild props file
eng/Build.props	Adds support for importing custom props and overriding ProjectToBuild items
.github/workflows/tests-quarantine.yml	Adds attributeName input parameter to pass "QuarantinedTest" to the reusable workflow
.github/workflows/tests-outerloop.yml	Adds attributeName input parameter to pass "OuterloopTest" to the reusable workflow
.github/workflows/specialized-test-runner.yml	Implements new build optimization logic with conditional package building

[Copilot]

The regex pattern only matches attributes with required string arguments like [QuarantinedTest(\"...\")], but according to the attribute definitions, both QuarantinedTest and OuterloopTest accept optional parameters and can be used without arguments (e.g., [QuarantinedTest] or [OuterloopTest]). The pattern should also match attributes without parentheses: \"^ *\\[${ATTRIBUTE_NAME}\\]\"

Suggested change

	PROJECTS=$(grep -rl "^ *\[${ATTRIBUTE_NAME}(\"[^\"]*\")\]" "$REPO_ROOT/tests" 2>/dev/null \
	PROJECTS=$(grep -Erl "^ *\[${ATTRIBUTE_NAME}( *\(.*\))?\]" "$REPO_ROOT/tests" 2>/dev/null \

[eerhardt]

Why do it this way? Instead of just setting <ProjectToBuild> to the right thing from the start?

[radical]

It would mean adding the check to all the conditions. I felt overriding at the end was better. But either is fine by me.

[eerhardt]

This is kind of gross. Why can't we use normal Test traits / categories / etc? Test frameworks have this stuff built in.

[radical]

We need to build all the test projects to do that. We do that on main right now. But that keeps running out of disk space. I had fixed it few weeks back to by limiting the build to only the test projects. We could maybe do some other stuff to reduce usage too, but it seemed like a losing game.

An alternative, albeit slower, would be to build one test project a time, use the test framework to get the runsheet generated, delete the project's artifacts, and move on to the next.

[radical]

We are essentially trying to limit the build to a small subset of test projects, so we need to find out which projects have any projects for outerloop or quarantined run.