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Add a mechanism to provide a list of protocol names for constant value extraction. #1170

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BalestraPatrick
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@BalestraPatrick BalestraPatrick commented Feb 19, 2024

This cherry-picks support for producing const values produced via the compiler flags -emit-const-values-path and -const-gather-protocols-file. rules_apple will start using this feature in bazelbuild/rules_apple#2418.

@BalestraPatrick BalestraPatrick force-pushed the constant-value-extraction branch 3 times, most recently from cbf792b to a3529d0 Compare February 24, 2024 22:27
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keith commented Feb 28, 2024

what's the general progress on this?

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I just verified this seems to be working in our project together with bazelbuild/rules_apple#2418

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were there any tests for this we could grab?

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@BalestraPatrick BalestraPatrick force-pushed the constant-value-extraction branch 6 times, most recently from b179ff3 to cc6abe8 Compare March 6, 2024 22:23
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@keith There were no tests upstream, but I tried my best at adding some. I also had to disable them on Linux due to the fact that we're using Swift 5.7 there, and from what I can see support for the flags we're using started in Swift 5.8.

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BalestraPatrick commented Mar 7, 2024

When testing this internally with a remote cache I'm getting Expected output Foo.swiftconstvalues was not created locally., so still need to investigate that.

Edit: removing our usage of --swiftcopt=-disallow-use-new-driver fixed the issue. I believe the old driver might not like this specific flag.

allevato and others added 9 commits May 16, 2024 10:20
…e extraction.

If a module populates `const_gather_protocols` when calling `create_swift_module_context`, any target that directly depends on that module will automatically have that list of protocols passed to the compiler via `-const-gather-protocols-file`. The output group `const_values` will then contain the JSON file with the extracted constant information.

This is meant to support Apple's AppIntents framework, which uses the output from `-emit-const-values-path` as an input to the AppIntent bundling tool.

PiperOrigin-RevId: 588388131
(cherry picked from commit 18f2f87)
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BalestraPatrick referenced this pull request May 17, 2024
…e extraction.

If a module populates `const_gather_protocols` when calling `create_swift_module_context`, any target that directly depends on that module will automatically have that list of protocols passed to the compiler via `-const-gather-protocols-file`. The output group `const_values` will then contain the JSON file with the extracted constant information.

This is meant to support Apple's AppIntents framework, which uses the output from `-emit-const-values-path` as an input to the AppIntent bundling tool.

PiperOrigin-RevId: 588388131
@BalestraPatrick BalestraPatrick merged commit 4cc4c95 into bazelbuild:master May 17, 2024
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@BalestraPatrick BalestraPatrick deleted the constant-value-extraction branch May 17, 2024 18:40
brentleyjones pushed a commit to bazelbuild/rules_apple that referenced this pull request Jul 10, 2024
Depends on bazelbuild/rules_swift#1170

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Co-authored-by: Nicholas Levin <[email protected]>
Co-authored-by: Patrick Balestra <[email protected]>
Co-authored-by: Luis Padron <[email protected]>
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5 participants