ci: build the core library and the app for the iOS simulator, run a UI smoke test

Adds the ios-sim workflow, triggered only by pushes to f/ci-ios-sim and by workflow_dispatch.

The core job builds lib:simplex-chat with cabal using the flake's iOS settings (swift JSON, client library, static roll-up archive, threaded RTS, CommonCrypto), packages it as the Hydra zip, and patches it for the simulator with scripts/ios/prepare.sh and mac2ios. The app job builds "SimpleX (iOS)" for the arm64 simulator against it and drives onboarding, the chat list and the search field with AXe, saving screenshots and accessibility trees.

This first run tests the whole pipeline, mainly whether the core library builds and links.

.github/workflows/ios-sim.yml

@@ -0,0 +1,161 @@
+name: ios-sim
+
+on:
+  push:
+    branches:
+      - f/ci-ios-sim
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ios-sim-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  GHC_VER: 9.6.3
+  CABAL_VER: 3.10.2.0
+  CORE_PKG: pkg-ios-aarch64-swift-json.zip
+  HOMEBREW_NO_AUTO_UPDATE: 1
+  HOMEBREW_NO_INSTALL_CLEANUP: 1
+
+jobs:
+  core:
+    name: core library for the iOS simulator
+    runs-on: macos-latest
+    timeout-minutes: 240
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Show runner
+        run: |
+          sw_vers
+          sysctl -n hw.ncpu hw.memsize
+          df -h /
+          xcodebuild -version
+
+      - name: Restore core library
+        id: core-cache
+        uses: actions/cache/restore@v4
+        with:
+          path: ~/Downloads/${{ env.CORE_PKG }}
+          key: ios-sim-core-${{ hashFiles('src/**', 'cabal.project', 'simplex-chat.cabal', 'scripts/ci/ios-sim/build-core.sh') }}
+
+      - name: Setup Haskell
+        if: steps.core-cache.outputs.cache-hit != 'true'
+        uses: simplex-chat/setup-haskell-action@v2
+        with:
+          ghc-version: ${{ env.GHC_VER }}
+          cabal-version: ${{ env.CABAL_VER }}
+
+      - name: Restore cabal store
+        id: cabal-cache
+        if: steps.core-cache.outputs.cache-hit != 'true'
+        uses: actions/cache/restore@v4
+        with:
+          path: |
+            ~/.cabal/store
+            dist-newstyle
+          key: ios-sim-ghc${{ env.GHC_VER }}-${{ hashFiles('cabal.project', 'simplex-chat.cabal') }}-${{ github.run_id }}
+          restore-keys: |
+            ios-sim-ghc${{ env.GHC_VER }}-${{ hashFiles('cabal.project', 'simplex-chat.cabal') }}-
+            ios-sim-ghc${{ env.GHC_VER }}-
+            macos-latest-ghc${{ env.GHC_VER }}-
+
+      - name: Install libraries
+        if: steps.core-cache.outputs.cache-hit != 'true'
+        run: brew install openssl@3 libffi gmp
+
+      - name: Build core library
+        id: build
+        if: steps.core-cache.outputs.cache-hit != 'true'
+        run: scripts/ci/ios-sim/build-core.sh ~/Downloads/${{ env.CORE_PKG }}
+
+      - name: Save cabal store
+        if: ${{ !cancelled() && steps.core-cache.outputs.cache-hit != 'true' }}
+        uses: actions/cache/save@v4
+        with:
+          path: |
+            ~/.cabal/store
+            dist-newstyle
+          key: ${{ steps.cabal-cache.outputs.cache-primary-key }}
+
+      - name: Save core library
+        if: steps.core-cache.outputs.cache-hit != 'true'
+        uses: actions/cache/save@v4
+        with:
+          path: ~/Downloads/${{ env.CORE_PKG }}
+          key: ${{ steps.core-cache.outputs.cache-primary-key }}
+
+      - name: Patch core library for the simulator
+        run: scripts/ci/ios-sim/prepare-libs.sh
+
+      - name: Upload core library
+        uses: actions/upload-artifact@v4
+        with:
+          name: ios-core-aarch64
+          path: ~/Downloads/${{ env.CORE_PKG }}
+          compression-level: 0
+          retention-days: 3
+          if-no-files-found: error
+
+  app:
+    name: app in the iOS simulator
+    needs: core
+    runs-on: macos-latest
+    timeout-minutes: 90
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Show runner
+        run: |
+          sw_vers
+          df -h /
+          xcodebuild -version
+          xcrun simctl list runtimes
+
+      - name: Download core library
+        uses: actions/download-artifact@v4
+        with:
+          name: ios-core-aarch64
+          path: ~/Downloads
+
+      - name: Prepare libraries
+        run: |
+          scripts/ci/ios-sim/prepare-libs.sh
+          scripts/ios/update-pbxproj.sh
+
+      - name: Build app
+        run: |
+          xcodebuild build -quiet \
+            -project apps/ios/SimpleX.xcodeproj \
+            -scheme "SimpleX (iOS)" \
+            -configuration Debug \
+            -destination 'generic/platform=iOS Simulator' \
+            -derivedDataPath "$RUNNER_TEMP/DerivedData" \
+            -onlyUsePackageVersionsFromResolvedFile \
+            -skipPackagePluginValidation \
+            -skipMacroValidation \
+            ARCHS=arm64 \
+            CODE_SIGN_STYLE=Manual \
+            CODE_SIGN_IDENTITY=- \
+            DEVELOPMENT_TEAM= \
+            PROVISIONING_PROFILE_SPECIFIER=
+
+      - name: Install AXe
+        run: brew install cameroncooke/axe/axe
+
+      - name: Run smoke test
+        run: scripts/ci/ios-sim/smoke-test.sh "$RUNNER_TEMP/DerivedData/Build/Products/Debug-iphonesimulator/SimpleX.app" "$RUNNER_TEMP/smoke-test"
+
+      - name: Upload smoke test results
+        if: ${{ !cancelled() }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: ios-sim-smoke-test
+          path: ${{ runner.temp }}/smoke-test
+          retention-days: 3
+          if-no-files-found: warn