Track sourceLink and resources in deterministic key

[Copilot]

This PR adds tracking for source link files and resources to the compiler's deterministic key file to ensure all compilation inputs that affect reproducible builds are properly tracked. The implementation includes calculating checksums for source link content and manifest resources (tracking name, fileName, isPublic, and content checksum), while ruleset tracking was deemed unnecessary since rulesets only affect compilation through diagnostic options that are already being tracked.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Missing inputs in the key file</issue_title>
<issue_description>Recently discovered that there are several inputs we are not tracking in the key file that need to be tracked:

• source link file
• ruleset file
• resources

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Missing inputs in the key file #65474

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[jcouv]

@copilot CI produced src/Compilers/Core/Portable/Compilation/DeterministicKeyBuilder.cs(434,31): error IDE0060: (NETCORE_ENGINEERING_TELEMETRY=Build) Remove unused parameter 'cancellationToken'

[Copilot]

@copilot CI produced src/Compilers/Core/Portable/Compilation/DeterministicKeyBuilder.cs(434,31): error IDE0060: (NETCORE_ENGINEERING_TELEMETRY=Build) Remove unused parameter 'cancellationToken'

Fixed in 08c5f38. Removed the unused cancellationToken parameter from the WriteEmitOptions method signature and its call site.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• sc4vsblobprodcus331.vsblob.vsassets.io
  • Triggering command: /usr/share/dotnet/dotnet dotnet build src/Compilers/Core/Portable/Microsoft.CodeAnalysis.csproj (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[jcouv]

@copilot GetKey(...) already handles default inputs (additionalTexts, analyzers, generators, resources, ...). There is no need for the caller of GetKey to also do NullToEmpty() on those.

[Copilot]

@copilot GetKey(...) already handles default inputs (additionalTexts, analyzers, generators, resources, ...). There is no need for the caller of GetKey to also do NullToEmpty() on those.

Fixed in e4530d3. Removed the redundant NullToEmpty() calls from the caller since GetKey() already handles default inputs internally.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• sc4vsblobprodcus331.vsblob.vsassets.io
  • Triggering command: /usr/share/dotnet/dotnet dotnet build src/Compilers/Core/Portable/Microsoft.CodeAnalysis.csproj (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[jcouv]

@copilot We should care about the ruleset contents, not just the path to the ruleset file

[Copilot]

@copilot We should care about the ruleset contents, not just the path to the ruleset file

Fixed in 2fac371. Changed from tracking ruleset file path to tracking ruleset content with checksum (similar to source link). The ruleset file is now opened and read as SourceText, with its checksum written to compilation.options.ruleSet.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• sc4vsblobprodcus331.vsblob.vsassets.io
  • Triggering command: /usr/share/dotnet/dotnet dotnet build src/Compilers/Core/Portable/Microsoft.CodeAnalysis.csproj (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[jcouv]

@copilot Remove IsEmbedded. It is redundant with FileName and we need FileName for non-embedded scenarios

[jaredpar]

Why are you converting to a SourceText here? These resources are generally treated as binary blobs in the codebase. My intuition would be that we just grab the raw Stream or byte[] and hash that. Not sure if we'd hit weird edge cases trying to view a binary as a source text.

[jcouv]

I'm investigating the determinism failure in CI with Microsoft.VisualStudio.Extensibility.Testing.Xunit: Resolved by adding the key file to the skip list (thanks Jared for the tip).

...
  "resources": [
    {
      "resourceName": "Microsoft.VisualStudio.IntegrationTestService.dll",
      "fileName": null,
      "isPublic": true,
      "content": {
        "checksum": "da3a9f2c2fc2de2bf0254f9f13e15726c7a260ab318acff9a77790ccc344a",
        "checksumAlgorithm": "Sha256"
      }
    },
    {
      "resourceName": "Microsoft.VisualStudio.IntegrationTestService.vsix",
      "fileName": null,
      "isPublic": true,
      "content": {
+      "checksum": "c88fbb3f45e9c061775c57b763ba4e3988857883a253d03ac7bed44bf113af9c", // Right
-      "checksum": "876736d2ee98f2c4cac77a7fac592adbd14924d583f914cf873dc67366c2f8c", // Left
        "checksumAlgorithm": "Sha256"
      }
    }
  ]
}

[AlekseyTs]

.key

Is this addition intentional?

[jcouv]

Yes, the key file didn't use to include some inputs, which are not the same across rebuilds (ie. a VSIX file). Now the key file includes them and thus varies across rebuilds as well.

[AlekseyTs]

LGTM (commit 26)