CI: say chosen image name and only trigger if src files are modified …

…or we want it to

.github/workflows/ci.yml

@@ -1,10 +1,12 @@
 name: Build and run
 
 on:
+  workflow_dispatch:
   push:
     branches: [ "master" ]
+    paths: ['src/**']
   pull_request:
-    branches: [ "*" ]
+    paths: ['src/**']
 
 jobs:
   build:
@@ -27,5 +29,7 @@ jobs:
     - name: Test
       run: |
         images=('/usr/local/share/icons/hicolor/128x128/apps/microsoft-edge.png' '/usr/local/share/icons/hicolor/128x128/apps/CMakeSetup.png' '/usr/local/doc/cmake/html/_static/file.png' '/usr/local/lib/android/sdk/extras/google/google_play_services/samples/tagmanager/cuteanimals/res/drawable/cat_1.jpg' '/usr/local/lib/android/sdk/extras/google/google_play_services/samples/wallet/res/drawable-ldpi/icon.png' '/usr/local/lib/android/sdk/extras/google/google_play_services/samples/wallet/res/drawable-hdpi/icon.png' '/usr/share/plymouth/themes/spinner/watermark.png' '/usr/share/apache2/icons/apache_pb.png' '/usr/share/doc/libpng-dev/examples/pngtest.png')
-        ./src/tiv -w 160 -h 48 ${images[ $RANDOM % ${#images[@]} ]} # Get random image
+        image=${images[ $RANDOM % ${#images[@]} ]} # Get random image
+        ./src/tiv -w 160 -h 48 $image # Get random image
+        echo $image
         ./src/tiv -w 160 -h 48 /usr/share/pixmaps # Dir mode