dvisvgm cannot create svg files in the default temporary storage folder on Windows

Describe the bug

When I run a scene that contains Tex and do not make changes to custom_defaults.yml, an OSError will be thrown, indicating that the svg file cannot be found.

OSError: C:\Users\Me\Temp\Tex\1b70addfb3f4902b.svg not Found

It may be because my current running directory is in the D: drive, and the system default temporary folder is in the C: drive. And dvisvgm cannot run across disks. And when I set temporary_storage in custom_defaults.yml to a folder in D: drive, it can run normally

Code:

class TestTemp(Scene):
    def construct(self):
        tex = Tex("abc")
        self.add(tex)

Wrong display or Error traceback:

Traceback

Traceback (most recent call last):
  File "manim.py", line 5, in <module>
    manimlib.main()
  File "D:\Users\Me\Desktop\manim\manim_shaders\manimlib\__init__.py", line 12, in main
    scene.run()
  File "D:\Users\Me\Desktop\manim\manim_shaders\manimlib\scene\scene.py", line 76, in run
    self.construct()
  File "test.py", line 5, in construct
    tex = Tex("abc")
  File "D:\Users\Me\Desktop\manim\manim_shaders\manimlib\mobject\svg\tex_mobject.py", line 167, in __init__      
    super().__init__(full_string, **kwargs)
  File "D:\Users\Me\Desktop\manim\manim_shaders\manimlib\mobject\svg\tex_mobject.py", line 48, in __init__       
    "should_remove_null_curves": True,
  File "D:\Users\Me\Desktop\manim\manim_shaders\manimlib\mobject\svg\svg_mobject.py", line 55, in __init__       
    self.file_path = get_full_vector_image_path(file_name)
  File "D:\Users\Me\Desktop\manim\manim_shaders\manimlib\utils\images.py", line 21, in get_full_vector_image_path
    extensions=[".svg", ".xdv"],
  File "D:\Users\Me\Desktop\manim\manim_shaders\manimlib\utils\file_ops.py", line 48, in find_file
    raise IOError(f"{file_name} not Found")
OSError: C:\Users\Me\AppData\Local\Temp\Tex\1b70addfb3f4902b.svg not Found

Additional context

dvisvgm version: 2.6.3

If I set the output level of dvisvgm to the highest level in tex_file_writing.py and output the executed command, I will see:

dvisvgm "C:\Users\Me\AppData\Local\Temp\Tex\1b70addfb3f4902b.dvi" -n -v 7 -o "C:\Users\Me\AppData\Local\Temp\Tex\1b70addfb3f4902b.svg" > nul

pre-processing DVI file (format version 2)
processing page 1
  computing extents based on data set by preview package (version 11.91)
  width=13.905134pt, height=6.944447pt, depth=0pt
  graphic size: 13.905134pt x 6.944447pt (4.887096mm x 2.440694mm)
  WARNING: failed to write output to C:../../../AppData/Local/Temp/Tex/1b70addfb3f4902b.svg
1 of 1 page converted in 1.398 seconds

Note that even if the output file is specified in the command as "C:\Users\Me\AppData\Local\Temp\Tex\1b70addfb3f4902b.svg" (absolute path). But dvisvgm still wants to use a relative path, and the currently running path is under D: drive, so dvisvgm specifies the disk to C: and sets the output location to "C:../../../AppData/Local/Temp/Tex/1b70addfb3f4902b.svg", which of course will cause errors.

So facing this problem, we should try to solve the problem of dvisvgm (I think it will be more difficult), or change a default temporary storage folder for Windows instead of using the system default tempfile.gettempdir().

[mgieseki]

I just stumbled over this ticket. The issue probably stems from the old dvisvgm version 2.6.3. It should be fixed since version 2.8.

[TonyCrane]

Sorry. That’s my fault.