[agarny]

Fixes #541.

[Copilot]

🟡 Changes recommended

A moderate active defect remains in pathFromUrl(), which can miscompute relative-import paths when a URI query or fragment contains a slash.

1 open issue

• Exclude query and fragment when deriving imported model paths · New

What changed in this PR

Adds support for resolving CellML imports across local files, remote URLs, in-memory files, nested imports, cyclic dependencies, and COMBINE archives.

Changes:

• Added recursive CellML import retrieval, parsing, caching, cycle handling, and error propagation.
• Added shared URI and file-location resolution utilities for CellML and SED-ML processing.
• Expanded C++, Python, and JavaScript test coverage with imported-model fixtures and error cases.

File	Description
VERSION.txt	Updates the project version.
tests/​support/​cellml/​basictests.cpp	Adds tests for local, remote, nested, in-memory, invalid, and cyclic CellML imports.
tests/​res/​support/​cellml/​model_with_various_imports/​other_component.cellml	Provides an imported component fixture with a nested units import.
tests/​res/​support/​cellml/​model_with_various_imports/​model.cellml	Provides a fixture exercising multiple import paths and URL forms.
tests/​res/​support/​cellml/​model_with_unsupported_scheme_import.cellml	Provides a fixture containing an import with an unsupported URI scheme.
tests/​res/​support/​cellml/​model_with_null_character_import.cellml	Provides a fixture testing rejection of a percent-encoded null character in an import path.
tests/​res/​support/​cellml/​model_with_nested_imports/​units.cellml	Provides units for nested import tests.
tests/​res/​support/​cellml/​model_with_nested_imports/​model.cellml	Provides the root model for nested import tests.
tests/​res/​support/​cellml/​model_with_nested_imports/​components/​component.cellml	Provides a component with its own units import.
tests/​res/​support/​cellml/​model_with_invalid_xml_import.cellml	Provides a fixture testing imports that point to invalid XML.
tests/​res/​support/​cellml/​model_with_invalid_cellml_import/​units.cellml	Provides an invalid CellML import target.
tests/​res/​support/​cellml/​model_with_invalid_cellml_import/​model.cellml	Provides a model that imports invalid CellML.
tests/​res/​support/​cellml/​model_with_import_cycle/​b.cellml	Defines one side of an import cycle fixture.
tests/​res/​support/​cellml/​model_with_import_cycle/​a.cellml	Defines the other side of an import cycle fixture.
tests/​bindings/​python/​test_sed_instance.py	Adds Python integration tests for executing simulations using imported CellML models.
tests/​bindings/​javascript/​sed.instance.test.js	Adds JavaScript integration tests for executing simulations using imported CellML models.
tests/​api/​sed/​instancetests.cpp	Adds C++ API integration tests for imported CellML models and COMBINE archives.
src/​support/​sedml/​sedmlfile.cpp	Uses shared URI resolution when locating SED-ML model sources.
src/​support/​sedml/​sedmlfile_p.h	Stores shared file-location metadata for SED-ML files.
src/​support/​combine/​combinearchive.cpp	Defers archive child type detection until all child contents are available.
src/​support/​cellml/​cellmlfile.cpp	Implements recursive CellML import retrieval, caching, parsing, registration, and resolution.
src/​support/​cellml/​cellmlfile_p.h	Declares CellML import-resolution support.
src/​misc/​utils.h	Declares shared file-location and URI-resolution utilities.
src/​misc/​utils.cpp	Implements shared file-location construction and URI-reference resolution.

_{Review effort: Lite}