Add macOS-26 GitHub Actions CI workflow for build + test with detailed test failure logs (damusTests only)

[Copilot]

Summary

This PR adds a GitHub Actions CI workflow to run Damus build/test on a macOS runner for PRs and pushes to main, and incorporates review-driven CI fixes for macos-26 compatibility, better test diagnostics, and test-suite scoping.

• Workflow scope
  • Adds .github/workflows/ci.yml
  • Triggers on pull_request and push to main
• Execution model
  • Runs a single build-and-test job on macos-26
  • Executes xcodebuild build and test for scheme damus
  • Uses simulator destination platform=iOS Simulator,name=iPhone 17 to match available simulators on macos-26
  • Keeps -quiet for build, but removes -quiet from test so failed tests print actionable failure details in CI logs
  • Runs only the damusTests suite in CI via -only-testing:damusTests (excludes damusUITests)
• Security baseline
  • Sets explicit token permissions: contents: read
  • Checks out submodules recursively

jobs:
  build-and-test:
    runs-on: macos-26
    permissions:
      contents: read
    env:
      SCHEME: damus
      DESTINATION: platform=iOS Simulator,name=iPhone 17

Checklist

Warning

Please file an issue or create a ticket for the work in this PR, then link it here.
We use issues and tickets to triage and prioritize work, so PRs without a linked issue/ticket may be delayed.

Experimental Feature Checklist

Tip

This Pull Request is an experimental feature for Damus Labs, and follows a fast-track review process.
The overall requirements are lowered and the review process is not as strict as usual. However, the feature will only be available for Purple users who opt-in.

• I have read (or I am familiar with) the Contribution Guidelines.
• I have done some testing on the changes in this PR to ensure it is at least functional.
• I have filed or linked an existing issue/ticket related to this change.
• I made sure that this new feature is only available when the user opts-in from the Damus Labs screen, and does not affect the rest of the app when turned off.
• My PR is either small, or I have split it into smaller logical commits that are easier to review.
• I have added the signoff line to all my commits. See Signing off your work.
• I have added an appropriate changelog entry to my commit in this PR. See Adding changelog entries.
  • Example changelog entry: Changelog-Added: Added experimental feature <X> to Damus Labs

Standard PR Checklist

• I have read (or I am familiar with) the Contribution Guidelines
• I have tested the changes in this PR
• I have profiled the changes to ensure there are no performance regressions, or I do not need to profile the changes.
  • Utilize Xcode profiler to measure performance impact of code changes. See https://developer.apple.com/videos/play/wwdc2025/306
  • If not needed, provide reason: CI/workflow-only change; no runtime/app code path changes.
• I have filed or linked an existing issue/ticket related to this change.
• I have split the changes into small, reviewable commits.
• I have added the signoff line to all my commits. See Signing off your work
• I have added appropriate changelog entries for the changes in this PR. See Adding changelog entries
  • I do not need to add a changelog entry. Reason: CI workflow/configuration-only change.
• I have added appropriate tags in the commit messages wherever applicable, or made sure those are not needed. See Submitting patches

Test report

Please provide a test report for the changes in this PR. You can use the template below, but feel free to modify it as needed.

Device: N/A (CI workflow change)

iOS: N/A

Damus: 8df0d38

Setup: Workflow YAML and PR automation validation only.

Steps: Add workflow, apply review-driven updates (macos-26 runner, simulator destination compatibility, verbose test logging, and restricting CI test execution to damusTests), inspect latest failed CI logs, validate YAML parse, run automated PR review + CodeQL checks.

Results:

• PASS
• Partial PASS
  • Details: Static/config validation passed; CI root causes identified and addressed; test step now emits detailed failure output and runs only damusTests; local xcodebuild execution unavailable in this sandbox.

Other notes

Kept scope intentionally narrow to one workflow file and minimal permissions, with compatibility, diagnostics, and test-scope updates required for the macos-26 runner image.

[danieldaquino]

@copilot use macos-26 image

[Copilot]

@copilot use macos-26 image

Updated the workflow to use macos-26 for the CI job in commit fe2a656.

[danieldaquino]

@copilot look at the latest failed CI results and fix.

[Copilot]

@copilot look at the latest failed CI results and fix.

I checked the latest failed CI run and fixed it in f596700 by updating the simulator destination to platform=iOS Simulator,name=iPhone 17, which exists on the macos-26 runner image.

[danieldaquino]

@copilot the test fails without providing information about the test failures. Please fix so that details of the test failures are provided.

[Copilot]

@copilot the test fails without providing information about the test failures. Please fix so that details of the test failures are provided.

Fixed in fb917ca: I removed -quiet from the CI xcodebuild ... test step so failed tests now emit detailed failure output in the workflow logs.

[danieldaquino]

@copilot, reconfigure things to run only the damusTests suite, and not the damusUITests suite

[Copilot]

@copilot, reconfigure things to run only the damusTests suite, and not the damusUITests suite

Done in 8df0d38: CI now runs only the damusTests suite by adding -only-testing:damusTests to the xcodebuild test step, so damusUITests are not run in this workflow.