Allow GraphBuilder to call script functions

[gramalingam]

• This extension allows calls to scripted functions within traced (GraphBuilder) calls.
• As part of this extension, allow the use of OpBuilder within scripted function
• Also fix the default value naming strategy to include node number to ensure uniqueness (in common cases).

TODO later: Consider integration of standard execution of script functions with execution of OpBuilder calls, as well as other extensions within script-mode to ensure both modes are seamless and uniform

[github-advanced-security]

lintrunner found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.

[codecov]

Codecov Report

❌ Patch coverage is 77.21519% with 36 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.48%. Comparing base (8b79816) to head (36da9f5).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
onnxscript/_internal/builder_test.py	80.00%	17 Missing ⚠️
onnxscript/_internal/_inliner.py	60.00%	6 Missing and 2 partials ⚠️
onnxscript/_internal/converter.py	60.00%	3 Missing and 3 partials ⚠️
onnxscript/_internal/builder.py	86.84%	2 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2820      +/-   ##
==========================================
+ Coverage   71.44%   71.48%   +0.03%     
==========================================
  Files         236      237       +1     
  Lines       28496    28645     +149     
  Branches     2819     2841      +22     
==========================================
+ Hits        20360    20476     +116     
- Misses       7171     7199      +28     
- Partials      965      970       +5     

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[Copilot]

Pull request overview

This pull request enables GraphBuilder/OpBuilder to call @script-decorated ONNXScript functions, allowing seamless composition of imperative (builder) and declarative (script) code. The PR also updates the default output naming strategy to include node numbers for better uniqueness.

Changes:

• Added call() method to GraphBuilder and OpBuilder that inlines script functions into the builder's graph
• Modified converter to accept OpBuilder as a default_opset parameter, converting it to Opset internally
• Updated default output naming from {op_type}_output to {op_type}_n{count}_output for uniqueness
• Created new _inliner.py module with function instantiation logic

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
onnxscript/_internal/builder.py	Added call() methods and domain/version properties to OpBuilder; updated naming strategy
onnxscript/_internal/converter.py	Added support for OpBuilder as default_opset with automatic conversion to Opset
onnxscript/_internal/_inliner.py	New module providing function instantiation/inlining capabilities
onnxscript/_internal/builder_test.py	Comprehensive tests for call() functionality with various options (_outputs, _prefix)
docs/tutorial/builder/graph_builder.md	Documentation for calling script functions from OpBuilder