Possible to overwrite files in the PCK? about godotpcktool

[hhyyrylainen]

Ty, that makes sense. I think I misunderstood how PckTool was working. I'm used to GDRETools which outputs files like project.godot rather than project.binary. So I assumed that the file in the PCK was already project.godot and that PckTool was encrypting it or something. But actually, GDRETools decompiles those files for you, whereas PckTool just works with the files in the PCK as they are.

That's correct. I have not used any Godot reverse engineering tools but from what I've heard second hand is that they include various tools to decode Godot format images back to png files etc. so they are useful for a variety of tasks.

GodotPckTool is meant to be just a really lightweight tool to work with the Godot .pck file format by extracting, modifying and creating .pck files, which is enough if you have all of the right data but it isn't in the right .pck file.

The build scripts I've written for Thrive can extract and remove large files from a .pck and store those separately, then the Thrive Launcher can download those separate files (and cache them, this saves a ton on download bandwidth) and use this tool to put those extracted files back into the .pck file to get it back to the original state.

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I'll close this issue now unless you think there's a bug in overwriting existing files in a .pck file.

[ithinkandicode]

Edit: I was mistaken. I didn't realise that when you replace project.godot, you actually have to provide an binary version (project.binary). I was trying to provide the non-binary version (project.godot).

Is there a way to add a file without needing to use the binary version?

Or alternatively, how does one go about making a binary version that would be compatible with GodotPckTool? My current workflow is to export a PCK then unpack it with GodotPckTool to get the project binary, but I'm sure there's an easier way!

[hhyyrylainen]

Is there a way to add a file without needing to use the binary version?

This tool is designed for simplicity (it is used by https://github.com/Revolutionary-Games/Thrive-Launcher to be able to save on download size by reusing already downloaded content files). As such the tool doesn't understand any of the Godot internal formats so it isn't possible for it to generate a project file.

Or alternatively, how does one go about making a binary version that would be compatible with GodotPckTool? My current workflow is to export a PCK then unpack it with GodotPckTool to get the project binary, but I'm sure there's an easier way!

I think that's the easiest way. At least that's what I'd do if I needed to for example get an image converted to a Godot binary format. I'd create a new project where I import that image, then export that and extract it from the .pck file and copy it to the pack.

Overwriting files should be as simple as specifying a .pck file to repack and then specifying additional files on the command line. The tool shouldn't care if something already exists in the .pck file when adding new content and it should just replace anything that already exists.

[ithinkandicode]

Thank you, that's incredibly helpful.

The modding team I'm working with found a good way to get the project.binary: we run a dumper script via the --script arg, which modifies the project settings with various ProjectSettings methods (.get_property_list, .get_setting, .set_setting) until they match what we need, then we use ProjectSetting.save_custom("project.binary") to save a customised version of the binary file. Ofc this only works for this specific file, but I'm mentioning it in case someone else has this very specific requirement too.

As such the tool doesn't understand any of the Godot internal formats so it isn't possible for it to generate a project file.

Ty, that makes sense. I think I misunderstood how PckTool was working. I'm used to GDRETools which outputs files like project.godot rather than project.binary. So I assumed that the file in the PCK was already project.godot and that PckTool was encrypting it or something. But actually, GDRETools decompiles those files for you, whereas PckTool just works with the files in the PCK as they are.