log pipeline stage count, add outpaint example

api/onnx_web/serve.py

@@ -594,6 +594,8 @@ def chain():
 
         pipeline.append((callback, stage, kwargs))
 
+    logger.info('running chain pipeline with %s stages', len(pipeline.stages))
+
     # build and run chain pipeline
     fake_source = Image.new('RGB', (1, 1))
     executor.submit_stored(output, pipeline, context,

common/pipelines/outpaint.json

@@ -0,0 +1,26 @@
+{
+  "stages": [
+    {
+      "name": "start",
+      "type": "source-txt2img",
+      "params": {
+        "prompt": "a magical wizard"
+      }
+    },
+    {
+      "name": "expand",
+      "type": "upscale-outpaint",
+      "params": {
+        "border": 256,
+        "prompt": "a magical wizard in a robe fighting a dragon"
+      }
+    },
+    {
+      "name": "save-local",
+      "type": "persist-disk",
+      "params": {
+        "tile_size": "hd8k"
+      }
+    }
+  ]
+}