FileAccess get_path contains an empty string when opened with compression.

[asolux]

Godot version

4.0.beta10

System information

Windows 10, 64bit

Issue description

The title says it all.
Opened in compression mode, whether read or write and whether the file already exists or not, get_path contains an empty string. This is also the case in C#.
However, if the file is opened without compression, get_path contains the absolute file path to the file as expected.
It doesn't matter whether an internal res:// path or an external system path is used.

Steps to reproduce

var file = FileAccess.open_compressed("res://file.txt", FileAccess.WRITE")
prints("get_path():", file.get_path())

output: get_path():

var file = FileAccess.open("res://file.txt", FileAccess.WRITE)
prints("get_path():", file.get_path())

output: get_path(): res://file.txt

or under C#:

using var file = FileAccess.OpenCompressed("res://test.txt", FileAccess.ModeFlags.Write);
GD.PrintS("GetPath():", file.GetPath());

output: GetPath():

Minimal reproduction project

N/A

[Calinou]

Can you reproduce this in 3.5.1?

[asolux]

Yes, this also happens with 3.5.1, just tested. But also on Windows 10.

var file = File.new()
file.open_compressed("res://test.txt", File.WRITE)
prints("get_path():", file.get_path())

output get_path():

var file = File.new()
file.open("res://test.txt", File.WRITE)
prints("get_path():", file.get_path())

output: get_path(): res://test.txt

[heppocogne]

Here's Godot4 FileAccess::get_path() implementation:

godot/core/io/file_access.h

Line 108 in 55da3c1

virtual String get_path() const { return ""; } /// returns the path for the current open file

And this function is not overridden in FileAccessCompressed. I think that's why open_compressed always returns empty string.