Add `README` section for rerun within the dataflow

examples/camera/dataflow_rerun.yml

@@ -0,0 +1,27 @@
+nodes:
+  - id: camera
+    build: pip install ../../node-hub/opencv-video-capture
+    path: opencv-video-capture
+    inputs:
+      tick: dora/timer/millis/20
+    outputs:
+      - image
+    env:
+      CAPTURE_PATH: 0
+      IMAGE_WIDTH: 640
+      IMAGE_HEIGHT: 480
+
+  - id: plot
+    build: cargo build -p dora-rerun --release
+    path: dora-rerun
+    inputs:
+      image:
+        source: camera/image
+        queue_size: 1
+    env:
+      IMAGE_WIDTH: 640
+      IMAGE_HEIGHT: 480
+      README: |
+        # Visualization of your webcam
+
+        - You can increase or decrease the frequency within the dataflow with: `tick: dora/timer/millis/20` in the webcam node.

examples/vlm/dataflow_rerun.yml

@@ -0,0 +1,43 @@
+nodes:
+  - id: camera
+    build: pip install -e ../../node-hub/opencv-video-capture
+    path: opencv-video-capture
+    inputs:
+      tick: dora/timer/millis/20
+    outputs:
+      - image
+    env:
+      CAPTURE_PATH: 0
+      IMAGE_WIDTH: 640
+      IMAGE_HEIGHT: 480
+
+  - id: dora-qwenvl
+    build: pip install -e ../../node-hub/dora-qwenvl
+    path: dora-qwenvl
+    inputs:
+      image:
+        source: camera/image
+        queue_size: 1
+      tick: dora/timer/millis/200
+    outputs:
+      - text
+      - tick
+    env:
+      DEFAULT_QUESTION: Describe the image.
+
+  - id: plot
+    build: cargo build -p dora-rerun --release
+    path: dora-rerun
+    inputs:
+      image:
+        source: camera/image
+        queue_size: 1
+      text: dora-qwenvl/tick
+    env:
+      IMAGE_WIDTH: 640
+      IMAGE_HEIGHT: 480
+      README: |
+        # Visualization of your webcam
+
+        - You can increase or decrease the frequency within the dataflow with: `tick: dora/timer/millis/20` in the webcam node.
+        - You can change the model prompt within the dataflow with: `DEFAULT_QUESTION: Describe the image.` 

node-hub/dora-rerun/src/main.rs

@@ -43,6 +43,20 @@ fn main() -> Result<()> {
         .spawn_opts(&options, None)
         .context("Could not spawn rerun visualization")?;
 
+    match std::env::var("README") {
+        Ok(readme) => {
+            readme
+                .parse::<String>()
+                .context("Could not parse readme value")?;
+            rec.log("README", &rerun::TextDocument::new(readme))
+                .wrap_err("Could not log text")?;
+        }
+        Err(VarError::NotUnicode(_)) => {
+            return Err(eyre!("readme env variable is not unicode"));
+        }
+        Err(VarError::NotPresent) => (),
+    };
+
     while let Some(event) = events.recv() {
         if let Event::Input { id, data, metadata } = event {
             if id.as_str().contains("image") {