snapshot of https://github.com/zulip/zulip.git @ 48c69911c7dd4e03b20552eb3bd77ad8151c1357 (2026-09-15)

tools/setup/generate_landing_page_images.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+"""Generates versions of landing page images to be served in different conditions."""
+
+import glob
+import os
+import sys
+from pathlib import Path
+
+ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+if ZULIP_PATH not in sys.path:
+    sys.path.append(ZULIP_PATH)
+
+import pyvips
+
+LANDING_IMAGES_DIR = os.path.join(ZULIP_PATH, "static", "images", "landing-page", "hello")
+ORIGINAL_IMAGES_DIR = os.path.join(LANDING_IMAGES_DIR, "original")
+GENERATED_IMAGES_DIR = os.path.join(LANDING_IMAGES_DIR, "generated")
+
+
+def get_x_size(size: int, x: int) -> int:
+    return int(x / 3.0 * size)
+
+
+def generate_landing_page_images() -> None:
+    if not os.path.exists(GENERATED_IMAGES_DIR):
+        os.mkdir(GENERATED_IMAGES_DIR)
+    else:
+        # Delete folder contents to avoid stale images between different versions of the script.
+        for file in os.listdir(GENERATED_IMAGES_DIR):
+            os.remove(os.path.join(GENERATED_IMAGES_DIR, file))
+
+    for image_file_path in glob.glob(f"{ORIGINAL_IMAGES_DIR}/*"):
+        file_name = Path(image_file_path).stem
+        image = pyvips.Image.new_from_file(image_file_path)
+        size = 2
+        scaled_width = get_x_size(image.width, size)
+        scaled_height = get_x_size(image.height, size)
+        scaled = image.thumbnail_image(scaled_width, height=scaled_height)
+        for format in ("webp[Q=60]", "jpg[Q=80,optimize-coding=true]"):
+            scaled.write_to_file(f"{GENERATED_IMAGES_DIR}/{file_name}-{size}x.{format}")
+
+
+if __name__ == "__main__":
+    generate_landing_page_images()