Add GitHub Actions iOS CI workflow

Author: djschilling

.github/workflows/ios-ci.yml

@@ -0,0 +1,88 @@
+name: iOS CI
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ios-ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build-and-test:
+    name: Build and Test (SOPA)
+    runs-on: macos-15
+    timeout-minutes: 30
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Select Xcode
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: latest-stable
+
+      - name: Show Xcode version
+        run: |
+          xcodebuild -version
+          swift --version
+
+      - name: Resolve Swift packages
+        run: |
+          xcodebuild \
+            -project SOPA.xcodeproj \
+            -scheme SOPA \
+            -resolvePackageDependencies
+
+      - name: Find iOS simulator destination
+        id: sim
+        shell: bash
+        run: |
+          set -euo pipefail
+          RUNTIME=$(xcrun simctl list runtimes available | grep -E 'iOS 18\\.' | head -n 1 | awk -F'[()]' '{print $2}')
+
+          if [[ -z "${RUNTIME:-}" ]]; then
+            echo "No iOS 18.x runtime found on this runner."
+            xcrun simctl list runtimes available
+            exit 1
+          fi
+
+          DEVICE_UDID=$(xcrun simctl list devices available "${RUNTIME}" | grep 'iPhone 16 (' | head -n 1 | awk -F '[()]' '{print $2}')
+
+          if [[ -z "${DEVICE_UDID:-}" ]]; then
+            echo "No iPhone 16 simulator found for runtime ${RUNTIME}."
+            xcrun simctl list devices available "${RUNTIME}"
+            exit 1
+          fi
+
+          echo "destination=id=${DEVICE_UDID}" >> "$GITHUB_OUTPUT"
+          echo "Using destination id=${DEVICE_UDID} on runtime ${RUNTIME}"
+
+      - name: Build
+        run: |
+          xcodebuild \
+            -project SOPA.xcodeproj \
+            -scheme SOPA \
+            -destination '${{ steps.sim.outputs.destination }}' \
+            build
+
+      - name: Test
+        run: |
+          xcodebuild \
+            -project SOPA.xcodeproj \
+            -scheme SOPA \
+            -destination '${{ steps.sim.outputs.destination }}' \
+            -resultBundlePath TestResults.xcresult \
+            test
+
+      - name: Upload test results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: xcresult
+          path: TestResults.xcresult
+          if-no-files-found: ignore