fix(execute_code): allow using directives at the top of a snippet - #1370
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lgarczyn wants to merge 2 commits into
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fix(execute_code): allow using directives at the top of a snippet#1370lgarczyn wants to merge 2 commits into
lgarczyn wants to merge 2 commits into
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WrapUserCode splices the snippet into a method body, where a using directive is
illegal: the parser reads it as a using-statement and demands '('. In our usage
two thirds of the snippets that declared a using failed on that alone.
Hoist the leading run into the wrapper header, blanking the lines in place so
compiler line numbers still map to what the caller wrote, and derive the line
offset from the header instead of a hardcoded 10 that silently drifts whenever
the header changes.
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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: Team Run ID: 📒 Files selected for processing (2)
🚧 Files skipped from review as they are similar to previous changes (2)
Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughChangesExecuteCode using directive support
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to This is a localized fix that enables leading using directives while preserving caller line mapping, with live validation against both compiler backends; no actionable merge-blocking risk remains beyond normal checks and review. Sequence Diagram(s)sequenceDiagram
participant Caller
participant ExecuteCode
participant Compiler
participant Diagnostics
Caller->>ExecuteCode: Submit user snippet
ExecuteCode->>ExecuteCode: Hoist using directives and calculate offset
ExecuteCode->>Compiler: Compile wrapped snippet with offset
Compiler->>Diagnostics: Report compiler diagnostics
Diagnostics-->>Caller: Return caller-relative line numbers
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Actionable comments posted: 2
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Inline comments:
In `@MCPForUnity/Editor/Tools/ExecuteCode.cs`:
- Around line 523-527: The directive scanner around the using-line regexes must
skip block comments as well as // comments, and recognize trailing comments
after valid using directives. Update the scanning logic near the existing
comment handling and the directive regexes used by ExecuteCode so leading
/*...*/ content is ignored and inline // or block trailing comments are accepted
without leaving the directive in the generated method body; add regression tests
for both cases.
- Around line 543-544: Update the alias/static-import hoisting logic around
BuiltinUsings, hoisted, and WrapUserCode so safety_checks=true validates each
hoisted using before accepting it. Reject aliases or static imports that expose
blocked operations such as F.Delete or Start, including imports from
System.Diagnostics.Process, while preserving existing behavior for safe imports.
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📒 Files selected for processing (2)
MCPForUnity/Editor/Tools/ExecuteCode.csTestProjects/UnityMCPTests/Assets/Tests/EditMode/Tools/ExecuteCodeTests.cs
Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.
…isting widening safety_checks A trailing '// note' made the directive fail both regexes, and a leading block comment stopped the scan outright; either way the directive was left in the method body, where it cannot compile. Hoisting also opened a hole: 'using System.IO;' puts File.Delete in scope, which no fully-qualified entry in _blockedPatterns matches. The blocklist is now expanded with the short forms each directive creates, covering namespace imports, aliases and using static.
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Description
A
usingdirective at the top of anexecute_codesnippet fails to compile, because the snippet is spliced into a method body where the directive is illegal. This hoists a leading run of directives into the wrapper header instead.Type of Change
Changes Made
WrapUserCodehoists the leading run ofusingdirectives into the wrapper header. Comments and blank lines are skipped; the first real statement stops the scan.WrapperLineOffset = 10, which silently drifted whenever the header changed. It is threaded throughCodeDomCompileandRoslynCompiler.Compile.using static, and aliases (including generic and array targets) are recognised. The C# 8using var x = ...;declaration deliberately is not, since hoisting it would break the body.ExecuteCodeTests.cs.Compatibility / Package Source
#beta,#main, tag, branch, orfile:):file:— branch checked out and symlinked in as an embedded packagePackages/packages-lock.json(if using a Git package URL): n/a,"source": "embedded". Branch tested at3722415d.Testing/Screenshots/Recordings
cd Server && uv run pytest tests/ -v)The 6 new EditMode tests are deliberately not ticked: they have not been run through the Test Runner. Every case they assert was exercised against a live editor instead, see Additional Notes. No Python changed.
Documentation Updates
tools/UPDATE_DOCS_PROMPT.md(recommended)No tool or resource is added, removed, or re-signatured. One caveat below.
Related Issues
None.
Additional Notes
How this was verified. The 6 assertions were run as live
execute_codecalls against a headless 2022.3.62f2 editor with this branch loaded as the package, under both compiler backends:autocodedomusing System.IO;hoistedusing static System.Math;using L = List<int>;usingafter a leading commentusing System;not duplicatedBoth backends matter because on this branch alone
autoresolves to CodeDom, i.e. C# 6. An earlier draft included ausing var x = ...;case, which is C# 8 and failed under CodeDom; it moved to the Roslyn PR below, where the language version is guaranteed.Doc caveat. The
codeparameter is documented as "Must be a valid method body." That is now slightly narrow, since a leading run ofusingdirectives is accepted and hoisted. It is a one-line change inexecute_code.pyplus a docs regen: happy to add it here or leave it for a follow-up.Related PR.
fix(execute_code): load Roslyn from Unity instead of falling back to C# 6also touchesExecuteCode.cs. Whichever lands second needs a rebase. This one is the better base.Summary by CodeRabbit
New Features
usingdirectives, includingusing static, aliases, generic type aliases, and directives following comments.System.Textfunctionality is available by default in executed snippets.Bug Fixes