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Copilot AI commented Aug 23, 2025

Problem

The GitHub Actions workflow was failing when syncing with upstream LoopKit/LoopWorkspace due to merge conflicts in fastlane/Fastfile:

Auto-merging fastlane/Fastfile
CONFLICT (content): Merge conflict in fastlane/Fastfile
Automatic merge failed; fix conflicts and then commit the result.
ERROR: exit 1

This prevented the automated sync process from keeping the fork up-to-date with upstream improvements, breaking the continuous integration workflow.

Solution

This PR validates and confirms that the existing custom sync scripts properly resolve the merge conflict issue by implementing the recommended "Option A" approach - keeping the fork's main branch identical to upstream by automatically discarding local Fastfile edits.

Key Components

Custom Sync Scripts: The repository already contains robust conflict resolution scripts:

  • Scripts/sync_with_upstream.sh - Handles full sync with automatic conflict resolution
  • Scripts/check_upstream_changes.sh - Lightweight upstream change detection

Automatic Conflict Resolution: The sync script automatically resolves fastlane/Fastfile conflicts by taking the upstream version:

git checkout --theirs "fastlane/Fastfile"

Workflow Integration: The build_loop.yml workflow has been updated to use these custom scripts instead of the failing Fork-Sync-With-Upstream-action.

Testing

Verified the solution works correctly with real merge conflict scenarios:

  • ✅ Successfully resolved actual fastlane/Fastfile conflicts
  • ✅ Confirmed the resolved file matches upstream exactly
  • ✅ Validated the repository is fully synced (0 new commits needed)
  • ✅ Tested both check and sync scripts in GitHub Actions environment

Result

The automated sync process now works reliably even when merge conflicts occur in fastlane/Fastfile. The fork automatically stays current with upstream LoopKit improvements while maintaining the build automation workflow without manual intervention.

The solution ensures the fork's main branch tracks upstream exactly for critical build configuration files while preserving the ability to apply customizations through other mechanisms like patches or feature branches.


✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

…2-eca4-41b7-bca9-f50085a158b4

# Conflicts:
#	.github/workflows/build_loop.yml
#	.github/workflows/create_certs.yml
#	G7SensorKit
#	Gemfile
#	Gemfile.lock
#	LibreTransmitter
#	LoopWorkspace.xcworkspace/contents.xcworkspacedata
#	OmniBLE
#	OmniKit
#	VersionOverride.xcconfig
#	fastlane/Fastfile
Copilot AI changed the title [WIP] still have issues here is some advice The action is failing because there’s a merge conflict in fastlane/Fastfile when pulling upstream/LoopKit/LoopWorkspace:main into your fork’s main. The action can’t auto-resolve that conflict, so it exits wit... Fix fastlane/Fastfile merge conflicts in upstream sync automation Aug 23, 2025
Copilot finished work on behalf of abmeks August 23, 2025 01:50
Copilot AI requested a review from abmeks August 23, 2025 01:50
@abmeks abmeks marked this pull request as ready for review August 23, 2025 02:00
@abmeks abmeks merged commit 13e6b31 into main Aug 23, 2025
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3 participants