Add script to download and extract model zip files

dl.py

@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+
+"""
+Use cURL and ImageMagick to download and extract a model zip-file.
+
+Downloads the URL (which must be a zip-file) and extracts it to
+model/<name>.obj and model/<name>.bmp.
+
+If the zip-file contains a README, it is printed to standard output.
+If the zip-file contains a PNG file, it is converted to BMP using
+the convert command from ImageMagick.
+
+If the zip-file contains multiple .obj or image files,
+the last one is used.
+"""
+
+import argparse
+import os
+import shutil
+import subprocess
+import sys
+import tempfile
+import zipfile
+
+
+parser = argparse.ArgumentParser(
+    description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter
+)
+parser.add_argument("url")
+parser.add_argument("name")
+
+
+def main():
+    args = parser.parse_args()
+    with tempfile.NamedTemporaryFile() as fp:
+        subprocess.check_call(("curl", "-Lo", fp.name, args.url))
+        zf = zipfile.ZipFile(fp.name)
+        for zi in zf.infolist():  # type: zipfile.ZipInfo
+            if zi.filename.endswith(".obj"):
+                targetpath = os.path.join("model", args.name + ".obj")
+                with zf.open(zi) as source, open(targetpath, "wb") as target:
+                    shutil.copyfileobj(source, target)
+            elif "readme" in zi.filename.lower():
+                with zf.open(zi) as source:
+                    shutil.copyfileobj(source, sys.stdout.buffer)
+                print("")
+            elif zi.filename.endswith(".bmp"):
+                targetpath = os.path.join("model", args.name + ".bmp")
+                with zf.open(zi) as source, open(targetpath, "wb") as target:
+                    shutil.copyfileobj(source, target)
+            elif zi.filename.endswith(".png"):
+                targetpath = os.path.join("model", args.name + ".bmp")
+                target = open(targetpath, "wb")
+                with target, zf.open(zi) as source:
+                    proc = subprocess.Popen(
+                        ("convert", "png:-", "bmp:-"),
+                        stdin=subprocess.PIPE,
+                        stdout=target,
+                    )
+                    with proc:
+                        shutil.copyfileobj(source, proc.stdin)
+                        proc.stdin.close()
+                        proc.wait()
+
+
+if __name__ == "__main__":
+    main()

dl.sh

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+#!/bin/sh
+python3 dl.py https://www.models-resource.com/download/593/ salesman
+python3 dl.py https://www.models-resource.com/download/4909/ dk
+python3 dl.py https://www.models-resource.com/download/677/ gohma
+python3 dl.py https://www.models-resource.com/download/4956/ charizard
+python3 dl.py https://www.models-resource.com/download/470/ saria
+python3 dl.py https://www.models-resource.com/download/689/ sheik