Swift Package Manager: tips for dependency updates

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  • August 05,2025

Swift Package Manager: tips for dependency updates

Swift Package Manager simplifies managing Swift dependencies, but updating them can require clearing caches, committing changes, and verifying `Package.swift` setups. Proper environment and tooling checks ensure smooth updates, especially in automated builds and complex projects like Capacitor plugins.

Swift Package Manager: Tips for Dependency Updates

1 ) Resolving Dependency Issues in Swift Packages  

  Problem: Swift build may fail to locate modules like ‘OpenAI’ after force pushing and updating tagged commits in a local SPM package.  

  Solution Insights:  

    Clear caches and push new tags to resolve inconsistencies.  

    Review your `Package.swift` for correct target dependencies and product declarations across library and app repos.  

    Verify that package dependencies in the app’s `Package.swift` are spelled and cased correctly as the package name.  

2 ) Working with Uncommitted Changes in Swift Package Dependencies  

  Issue: Xcode’s “Swift Packages” update only recognizes committed changes to dependencies, blocking fast iterative development on local packages.  

  Workaround:  

    Currently, uncommitted changes aren't picked up automatically. You must commit changes before updating package dependency versions via Xcode.  

    No direct automation for package update in Xcode; workflow requires manual commit then update.  

  Potential Improvements: Developers seek features to see uncommitted changes or automate swift package updates without frequent commits.

3 ) Swift Package Update Failures in Non Interactive Contexts (NSTask/XPC Services)  

  Issue: Running `swift package update` from an NSTask inside an XPC service fails with “Couldn’t fetch updates from remote repositories” error, despite working fine in a normal terminal.  

  Cause: Likely authentication or environment context differences. For instance, GitHub’s rate limits or missing SSH keys during NSTask runs could cause fetch failures.  

  Diagnostics:  

    Confirm the same user context and environment variables between terminal and NSTask.  

    Use HTTPS for dependencies if SSH keys are missing or unauthenticated.  

    Be cautious of rate limits and access permissions when fetching from public repositories in automated contexts.

4 ) Using Swift Package Manager with Capacitor Plugins  

  Challenge: Incorporating an SPM package dependency in a Capacitor plugin (especially for third party SDKs only available via SPM).  

  Capacitor 6 Beta Improvements:  

    Provides more native support for SPM dependencies compared to Capacitor 5 which primarily used CocoaPods.  

    For SPM only libraries, the app project must also be configured as an SPM project.  

  Known Issues & Tips:  

    SPM support in Capacitor 6 is still considered beta, and some setup issues like missing target dependency entries in `Package.swift` can cause runtime errors (e.g., a plugin “not implemented” on iOS).  

    Manually verify `Package.swift` target dependencies to ensure plugin dependencies are correctly included.

Summary: When managing Swift package dependencies, especially for local packages under active development or in automated build contexts, understanding cache behaviors, commit requirements, environment differences, and tooling specific support is vital. Capacitor’s evolving native SPM support is promising but requires careful configuration and may present teething issues. Consistently reviewing `Package.swift` files, verifying package names and targets, and adapting workflow steps help maintain successful dependency updates.

 

 

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