Ensure temporary svg paths for Text are deleted

manimlib/mobject/svg/text_mobject.py

@@ -20,6 +20,7 @@ from manimlib.mobject.svg.string_mobject import StringMobject
 from manimlib.utils.cache import cache_on_disk
 from manimlib.utils.color import color_to_hex
 from manimlib.utils.color import int_to_hex
+from manimlib.utils.simple_functions import hash_string
 
 from typing import TYPE_CHECKING
 
@@ -74,34 +75,29 @@ def markup_to_svg(
         pango_width = line_width / FRAME_WIDTH * DEFAULT_PIXEL_WIDTH
 
     # Write the result to a temporary svg file, and return it's contents.
-    # TODO, better would be to have this not write to file at all
-    #
-    # To avoid CAIRO_STATUS_WRITE_ERROR: b'error while writing to
-    # output stream' on Windows, we need to pass 'delete=False'.
-    with tempfile.NamedTemporaryFile(suffix='.svg', mode='r+', delete=False) as tmp:
-        manimpango.MarkupUtils.text2svg(
-            text=markup_str,
-            font="",                     # Already handled
-            slant="NORMAL",              # Already handled
-            weight="NORMAL",             # Already handled
-            size=1,                      # Already handled
-            _=0,                         # Empty parameter
-            disable_liga=False,
-            file_name=tmp.name,
-            START_X=0,
-            START_Y=0,
-            width=DEFAULT_CANVAS_WIDTH,
-            height=DEFAULT_CANVAS_HEIGHT,
-            justify=justify,
-            indent=indent,
-            line_spacing=None,           # Already handled
-            alignment=alignment,
-            pango_width=pango_width
-        )
-
-        # Read the contents
-        tmp.seek(0)
-        return tmp.read()
+    temp_file = Path(tempfile.gettempdir(), hash_string(markup_str)).with_suffix(".svg")
+    manimpango.MarkupUtils.text2svg(
+        text=markup_str,
+        font="",                     # Already handled
+        slant="NORMAL",              # Already handled
+        weight="NORMAL",             # Already handled
+        size=1,                      # Already handled
+        _=0,                         # Empty parameter
+        disable_liga=False,
+        file_name=str(temp_file),
+        START_X=0,
+        START_Y=0,
+        width=DEFAULT_CANVAS_WIDTH,
+        height=DEFAULT_CANVAS_HEIGHT,
+        justify=justify,
+        indent=indent,
+        line_spacing=None,           # Already handled
+        alignment=alignment,
+        pango_width=pango_width
+    )
+    result = temp_file.read_text()
+    os.remove(temp_file)
+    return result
 
 
 class MarkupText(StringMobject):