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Sema: Limit error on LE importing non-LE modules to SDK modules

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Limit reporting as an error imports of a non-library-evolution module
from a library-evolution enabled module to sources that are part of the
SDK. The error also requires having enabled `InternalImportsByDefault`.
This should help prevent SDK breaking regressions while loosening the
restriction elsewhere.

Framework owners can enable `-library-level api` or `spi` to get this
check as an error, along with more sanity checks.

Other cases remain as a warning. We should look to silence it in some
cases or offer a flag to do so.

rdar://160414667
This commit is contained in:
Alexis Laferrière
2025-09-16 09:53:55 -07:00
parent 3a7cf4747c
commit 8b38d29333
3 changed files with 49 additions and 19 deletions
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32
test/ModuleInterface/imports-swift7.swift
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@@ -5,8 +5,31 @@
// RUN: %target-swift-frontend -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import -emit-module -o %t/nonResilient.swiftmodule %t/empty.swift
// RUN: %target-swift-frontend -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import -emit-module -o %t/resilient.swiftmodule %t/empty.swift -enable-library-evolution
/// Check errors.
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) %t/clientWithError.swift -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import -I %t -verify -enable-upcoming-feature InternalImportsByDefault
/// Warning vs error on public import of a non-LE module from LE.
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) \
// RUN: %t/clientWithError.swift -I %t -verify \
// RUN: -disable-implicit-concurrency-module-import \
// RUN: -disable-implicit-string-processing-module-import \
// RUN: -enable-upcoming-feature InternalImportsByDefault \
// RUN: -verify-additional-prefix library-level-private-
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) \
// RUN: %t/clientWithError.swift -I %t -verify \
// RUN: -disable-implicit-concurrency-module-import \
// RUN: -disable-implicit-string-processing-module-import \
// RUN: -enable-upcoming-feature InternalImportsByDefault \
// RUN: -verify-additional-prefix library-level-private- -library-level ipi
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) \
// RUN: %t/clientWithError.swift -I %t -verify \
// RUN: -disable-implicit-concurrency-module-import \
// RUN: -disable-implicit-string-processing-module-import \
// RUN: -enable-upcoming-feature InternalImportsByDefault \
// RUN: -verify-additional-prefix library-level-public- -library-level spi
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) \
// RUN: %t/clientWithError.swift -I %t -verify \
// RUN: -disable-implicit-concurrency-module-import \
// RUN: -disable-implicit-string-processing-module-import \
// RUN: -enable-upcoming-feature InternalImportsByDefault \
// RUN: -verify-additional-prefix library-level-public- -library-level api
/// Check Swift 7 imports printed in swiftinterface from 2 source files.
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) %t/main.swift %t/main-other.swift -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import -I %S/Inputs/imports-clang-modules/ -I %t -verify -enable-upcoming-feature InternalImportsByDefault
@@ -38,8 +61,11 @@ public import D // expected-warning {{public import of 'D' was not used in publi
public import NotSoSecret // expected-warning {{'NotSoSecret' inconsistently imported as implementation-only}}
// expected-warning @-1 {{public import of 'NotSoSecret' was not used in public declarations or inlinable code}}
@_implementationOnly import NotSoSecret2 // expected-note {{imported as implementation-only here}}
//--- clientWithError.swift
@_exported public import nonResilient // expected-error {{module 'nonResilient' was not compiled with library evolution support; using it means binary compatibility for 'clientWithError' can't be guaranteed}}
@_exported public import nonResilient
// expected-library-level-public-error @-1 {{module 'nonResilient' was not compiled with library evolution support; using it means binary compatibility for 'clientWithError' can't be guaranteed}}
// expected-library-level-private-warning @-2 {{module 'nonResilient' was not compiled with library evolution support; using it means binary compatibility for 'clientWithError' can't be guaranteed}}
// CHECK-7-NOT: import
// CHECK-7: {{^}}public import A{{$}}