Dependency Scanning Library#34786

Merged

artemcm merged 35 commits intoswiftlang:mainfrom

artemcm:DependencyScanLibrary

Jan 8, 2021

Commits on Jan 7, 2021

[Dependency Scanning] Add a C++ itnerface for a tool that answers dependency-scanning queries.
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[Dependency Scanning] Add a unittest harness to invoke the dependency scanning tool C++ library
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[Dependency Scanning] Factor ModuleDependenciesCache out of a CompilerInstance into callers of scanDependencies
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[Dependency Scanning] Add DependencyScanningTool entry-point for batch scanning
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[Dependency Scanning] Deprecate and remove `-scan-clang-dependencies`
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Rename `SwiftScan` directory into `DependencyScan`
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[Dependency Scanning] Factor out import prescan into separate utility
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[Dependency Scanning] Refactor dependency scanner to return an in-memory format as a result
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[Dependency Scanning] Add a C API layer for dependency scanning tool, scanning actions, and scan results.
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[Dependency Scanning] Add entry-point to DependencyScanningTool and the corresponding C API for an import prescan operation
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[Dependency Scanning] Use an opaque type for dependency module details with API query functions for individual fields
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[Dependency Scanning] Add entry-point to DependencyScanningTool and the corresponding C API for a batch scan operation
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[Dependency Scanning] Change C API prefix to: `swiftscan` from `ds` and adopt query method naming scheme of:
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[Dependency Scanning] Make a module's dependency info an opaque structure
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[Dependency Scanning] Make the overall dependency scan result (inter-module dependency graph) an opaque structure
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[Dependency Scanning] Make the batch scan entry container an opaque type
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[Dependency Scanning] Make the prescan dependency scan result (import set) an opaque structure
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[Dependency Scanning] Make scanner invocation context (argc, argv, working_dir) an opaque type
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[Dependency Scanning] Export opaque types as pointers to C structs instead of `void*` for better type-safety and cleaner code
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[Dependency Scanning] Add setters for the scanner invocation context and a creation method to return an isntance of the opaque invocation
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[Dependency Scanning] Factor the shared library libSwiftScan into `tools` and add exports file.
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[Dependency Scanning] Refactor string implementation to always malloc and tie lifetime to owning object.
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[Dependency Scanning] Fix modulemap module name for the _InternalSwiftScan module.
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[Dependency Scanning] Fix the DependencyScan unit test harness to reflect C API changes.
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[Dependency Scanning] Establish object ownership convention by using a Foundation-style ownership signals naming scheme across the API surface.
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[Dependency Scanning] Use DEFINE_SIMPLE_CONVERSION_FUNCTIONS macro instead of defining own wrap/unwrap functions for the opaque scanner type.
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[Dependency Scanning] Bugfix: check for null C string before checking if it is `empty`
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[Dependency Scanning] Use `size_t` for array sizes and re-arrange array struct type fields to be consistent.
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[Dependency Scanning] Cache compiler instance/module depenency cache used for batched versioned-PCM scans.
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[Dependency Scanning] Remove the C string getter in favour of client-side string construction
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Do not use Designated Initializers as they are not yet supported by all of our build compilers.
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[Dependency Scanning] Skip over source-code (not interface) modules when collecting cross import overlays
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[Dependency Scanning] Update cached batch scan compiler instances with up-to-date search paths on successive scanner invocations
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[Dependency Scanning] Ensure INITIALIZE_LLVM() is invoked on scanner creation to populate LLVM's target data store.
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Commits on Jan 8, 2021

Change file generation in the DependencyScan.ModuleDeps unittest to hopefully work better on windows.
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