Import failure for files with a double quote (") or \n characters in their path

[akien-mga]

Godot version

4.0.dev (5a912b0)

System information

Linux, Mageia 9 x86_64

Issue description

While working on #59998, I noticed that the import system fails on files with either " or \n (the \ and n characters, not an actual newline) in their names.

Those are actually two different bugs with slightly different symptoms, but they're both related to not properly escaping characters for paths so I'm reporting them together.

Path with \n

With a file named ic\non.png, I get this spam of errors:

Failed to get modified time for: res://ic\non.png
ERROR: Can't find file 'res://ic\non.png'.
   at: _reimport_file (editor/editor_file_system.cpp:1826)
ERROR: Can't find file 'res://ic\non.png'.
   at: _reimport_file (editor/editor_file_system.cpp:1826)
ERROR: Can't find file 'res://ic\non.png'.
   at: _reimport_file (editor/editor_file_system.cpp:1826)

Ad lib.

Path with "

Testing with a file named ic"on.png.
This actually imports fine, but then the imported file can't be loaded because the .import file has a truncated path:

ERROR: Resource file not found: res://.godot/imported/ic.
   at: _load (core/io/resource_loader.cpp:210)
ERROR: Failed loading resource: res://ic"on.png. Make sure resources have been imported by opening the project in the editor at least once.
   at: _load (core/io/resource_loader.cpp:205)

Indeed, the ic"on.png.import file (which can be written and read fine, no path problem here) has:

[remap]

importer="texture"
type="CompressedTexture2D"
uid="uid://bbgni03s4qttg"
path="res://.godot/imported/ic"on.png-fce67098bfe0809314a688c358dbb285.ctex"
metadata={
"vram_texture": false
}

[deps]

source_file="res://ic\"on.png"
dest_files=["res://.godot/imported/ic\"on.png-fce67098bfe0809314a688c358dbb285.ctex"]

The dest_files is correctly escaped, but the path field is not, so it gets truncated when parsing.

Steps to reproduce

• Create a new project
• Rename icon.png to ic\non.png to see the first issue
• Rename icon.png to ic"on.png to see the second issue
• Might be Linux or Unix specific

Minimal reproduction project

TestImportPathBugs.zip

[adamscott]

Congrats for the #60000 th issue!