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Conditional dependencies break PackLib.Planner

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难度
4/5
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3-5 天
新手友好度
35/100
Issue 类型
缺陷
描述清晰度
描述清楚
活跃度
停滞
技术栈
swift
领域
build-system

调研方向

Start by reading Sources/PackLib/Planner.swift at lines 435–437, then reproduce with swift-structured-queries v0.11.0 as described. Check how the disabled StructuredQueriesTagged trait affects dependency resolution; done means Planner no longer tries to resolve Tagged when that trait is disabled.

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描述

bug

Description

When using a package that has conditionally-included dependencies (such as dependencies that are pulled in iff a Package Trait is enabled), Planner will try to resolve them unconditionally. If the dependency isn't actually pulled in by SwiftPM, then, Planner will fail here:

https://github.com/xtool-org/xtool/blob/836fca8dafac6b0c5b3ff1060c41b4c88883d54e/Sources/PackLib/Planner.swift#L435-L437

To repro: try adding a dependency on https://github.com/pointfreeco/swift-structured-queries @ v0.11.0. We end up with the error Could not find package containing product 'Tagged', because Planner doesn't know that the Tagged dependency is only required when the StructuredQueriesTagged trait is enabled (and in this case the trait is disabled.)

Environment

Host OS: Ubuntu 24.04.3 LTS
Swift version: swift-6.1-RELEASE
SDK version: iOS 18.5

主要语言
Swift
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从这里开始

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  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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