[build] Add delete_duplicate_images.py script to replace --skip-idle

build/screenshots/delete_duplicate_images.py

@@ -0,0 +1,26 @@
+import argparse
+import pathlib
+
+parser = argparse.ArgumentParser(
+    description="This script deletes successions of duplicated images in the folder, leaving just one per event entailing a visual change."
+)
+parser.add_argument(
+    "-o", "--output-folder", default="screenshots_each_step", help="output folder"
+)
+
+
+def main():
+    args = parser.parse_args()
+    folder = pathlib.Path(args.output_folder) / "images"
+    # Compare png contents and remove successive duplicates
+    previousImage = b""
+    for png in sorted(folder.glob("img-*.png")):
+        image = png.read_bytes()
+        if image == previousImage:
+            png.unlink()
+        else:
+            previousImage = image
+
+
+if __name__ == "__main__":
+    main()