[SR-15753] Properly export top-level decls from @_exported import modules into the symbol graph

[QuietMisdreavus]

Previous ID	SR-15753
Radar	rdar://89547374
Original Reporter	@QuietMisdreavus
Type	Improvement
Status	Resolved
Resolution	Done

Additional Detail from JIRA

Votes	0
Component/s	Swift-DocC
Labels	Improvement
Assignee	@franklinsch
Priority	Medium

md5: 3036c7fd1b6ab90027e1cf5a38812878

Issue Description:

While investigating swiftlang/swift#40860, i noticed that symbols from @_exported import are not getting included in the symbol graph file of the module that imports them. Since these symbols are part of the module's API, its symbol graph file should contain them.

[franklinsch]

@QuietMisdreavus I think the description of this bug got cut off? 🙂

[franklinsch]

@swift-ci create

[franklinsch]

PR: swiftlang/swift#41577

My patch here doesn't work when extracting symbol graph files with swift-symbolgraph-extract. I filed https://bugs.swift.org/browse/SR-15921 to track this.