setting up CI to build the NC app

.github/workflows/build.yml

@@ -1,13 +1,17 @@
 name: Build and Test
+
 on: [push, workflow_dispatch]
+
+env:
+  XC_VERSION: ${{ '15.1' }}
+  CCACHE_COMPRESS: "true"
+  CCACHE_COMPRESSLEVEL: "10"
+  CCACHE_MAXSIZE: "400M"
+
 jobs:
+
   unit-tests:
     runs-on: macos-13
-    env:
-      XC_VERSION: ${{ '15.1' }}
-      CCACHE_COMPRESS: "true"
-      CCACHE_COMPRESSLEVEL: "10"
-      CCACHE_MAXSIZE: "400M"
     strategy:
       matrix:
         configuration: ["Debug", "Release", "ASAN"]
@@ -44,3 +48,44 @@ jobs:
         echo "Done"
       env:
         GH_TOKEN: ${{ github.token }}
+
+  build-unsigned:
+    runs-on: macos-13
+    steps:
+    - name: Select latest Xcode
+      run: "sudo xcode-select -s /Applications/Xcode_$XC_VERSION.app"
+    - name: Install deps
+      run: |
+        brew install ccache
+        brew install create-dmg
+    - name: Cache ccache
+      uses: actions/cache@v2
+      with:
+        path: ~/Library/Caches/ccache
+        key: ccache-${{ github.job }}-${{ github.run_id }}
+        restore-keys: ccache-${{ github.job }}
+    - uses: actions/checkout@v2
+    - name: Build and run unit tests
+      run: "cd Scripts && ./build_unsigned.sh"
+    - name: Show ccache stats
+      run: "ccache --show-stats --verbose"
+    - name: Remove old ccache caches
+      run: |
+        gh extension install actions/gh-actions-cache
+        echo "Fetching list of cache key"
+        cacheKeys=$(gh actions-cache list --key ccache-${{ github.job }}- | cut -f 1 )
+        # Setting this to not fail the workflow while deleting cache keys.
+        set +e
+        echo "Deleting caches..."
+        for cacheKey in $cacheKeys
+        do
+            gh actions-cache delete $cacheKey --confirm
+        done
+        echo "Done"
+      env:
+        GH_TOKEN: ${{ github.token }}
+    - uses: actions/upload-artifact@v4
+      with:
+        name: my-artifact
+        path: Scripts/*.dmg
+        if-no-files-found: error