MetaCore/rewrite.py

import re
import codecs

path = 'Source/MetaCoreEditor/Private/MetaCoreBuiltinCoreServicesModule.cpp'
with codecs.open(path, 'r', 'utf-8') as f:
    text = f.read()

if '#include <cgltf.h>' not in text and '#include "cgltf.h"' not in text:
    text = text.replace('#include <imgui.h>', '#include <imgui.h>\r\n#include "cgltf.h"')

pattern = re.compile(r'\[\[nodiscard\]\] MetaCoreModelAssetDocument MetaCoreBuildImportedGltfAssetDocument\([\s\S]*?\)\s*\{[\s\S]*?\n\}\n\n\[\[nodiscard\]\] MetaCoreModelAssetDocument MetaCoreBuildImportedGenericModelAssetDocument')

replacement = '''[[nodiscard]] MetaCoreModelAssetDocument MetaCoreBuildImportedGltfAssetDocument(
    const std::filesystem::path& absoluteSourcePath,
    const std::filesystem::path& relativeSourcePath,
    std::uint64_t sourceHash
) {
    MetaCoreModelAssetDocument document;
    document.AssetType = "model";
    document.ImporterId = "GltfModelImporter";
    document.SourcePath = relativeSourcePath;
    document.SourceHash = sourceHash;
    document.ModelKind = MetaCoreModelAssetKind::Gltf;
    document.SourceFormat = absoluteSourcePath.extension() == ".glb" ? "glb" : "gltf";

    cgltf_options options = {};
    cgltf_data* data = nullptr;
    cgltf_result result = cgltf_parse_file(&options, absoluteSourcePath.string().c_str(), &data);

    if (result != cgltf_result_success) {
        MetaCoreImportedGltfNodeDocument rootNode;
        rootNode.Name = absoluteSourcePath.stem().string();
        document.Nodes.push_back(std::move(rootNode));
        return document;
    }

    result = cgltf_load_buffers(&options, data, absoluteSourcePath.string().c_str());
    if (result != cgltf_result_success) {
        cgltf_free(data);
        MetaCoreImportedGltfNodeDocument rootNode;
        rootNode.Name = absoluteSourcePath.stem().string();
        document.Nodes.push_back(std::move(rootNode));
        return document;
    }

    if (data->images_count > 0) {
        for (std::size_t i = 0; i < data->images_count; ++i) {
            const cgltf_image& image = data->images[i];
            MetaCoreImportedGltfTextureDocument textureDoc;
            textureDoc.SourcePath = image.uri ? std::filesystem::path(image.uri).lexically_normal() : std::filesystem::path{};
            textureDoc.UsageHint = "Unknown";
            
            MetaCoreTextureAssetDocument genTex;
            genTex.AssetGuid = MetaCoreMakeDeterministicGeneratedAssetGuid(relativeSourcePath, "texture", image.name ? image.name : ("tex_" + std::to_string(i)), i);
            genTex.Name = image.name ? image.name : ("Texture_" + std::to_string(i));
            genTex.SourcePath = textureDoc.SourcePath;
            genTex.UsageHint = "Unknown";
            
            document.Textures.push_back(std::move(textureDoc));
            document.GeneratedTextureAssets.push_back(std::move(genTex));
        }
    }

    if (data->materials_count > 0) {
        for (std::size_t i = 0; i < data->materials_count; ++i) {
            const cgltf_material& mat = data->materials[i];
            MetaCoreImportedGltfMaterialDocument matDoc;
            matDoc.Name = mat.name ? mat.name : ("Material_" + std::to_string(i));
            matDoc.DoubleSided = mat.double_sided;
            
            MetaCoreMaterialAssetDocument genMat;
            genMat.AssetGuid = MetaCoreMakeDeterministicGeneratedAssetGuid(relativeSourcePath, "material", mat.name ? mat.name : ("mat_" + std::to_string(i)), i);
            genMat.Name = matDoc.Name;
            genMat.DoubleSided = mat.double_sided;
            genMat.AlphaCutoff = mat.alpha_cutoff;
            genMat.AlphaMode = mat.alpha_mode == cgltf_alpha_mode_blend ? MetaCoreMaterialAlphaMode::Blend : (mat.alpha_mode == cgltf_alpha_mode_mask ? MetaCoreMaterialAlphaMode::Mask : MetaCoreMaterialAlphaMode::Opaque);
            
            if (mat.has_pbr_metallic_roughness) {
                genMat.BaseColor = glm::vec3(mat.pbr_metallic_roughness.base_color_factor[0], mat.pbr_metallic_roughness.base_color_factor[1], mat.pbr_metallic_roughness.base_color_factor[2]);
                genMat.Metallic = mat.pbr_metallic_roughness.metallic_factor;
                genMat.Roughness = mat.pbr_metallic_roughness.roughness_factor;
                
                if (mat.pbr_metallic_roughness.base_color_texture.texture) {
                    const std::int32_t texIdx = static_cast<std::int32_t>(mat.pbr_metallic_roughness.base_color_texture.texture->image - data->images);
                    matDoc.TextureIndices.push_back(texIdx);
                    genMat.BaseColorTexture = document.GeneratedTextureAssets[texIdx].AssetGuid;
                }
            }

            document.Materials.push_back(std::move(matDoc));
            document.GeneratedMaterialAssets.push_back(std::move(genMat));
        }
    }

    if (data->meshes_count > 0) {
        for (std::size_t i = 0; i < data->meshes_count; ++i) {
            const cgltf_mesh& mesh = data->meshes[i];
            MetaCoreImportedGltfMeshDocument meshDoc;
            meshDoc.Name = mesh.name ? mesh.name : ("Mesh_" + std::to_string(i));
            meshDoc.PrimitiveCount = static_cast<std::int32_t>(mesh.primitives_count);
            
            MetaCoreMeshAssetDocument genMesh;
            genMesh.AssetGuid = MetaCoreMakeDeterministicGeneratedAssetGuid(relativeSourcePath, "mesh", mesh.name ? mesh.name : ("mesh_" + std::to_string(i)), i);
            genMesh.Name = meshDoc.Name;

            for (std::size_t p = 0; p < mesh.primitives_count; ++p) {
                const cgltf_primitive& prim = mesh.primitives[p];
                std::int32_t matIdx = -1;
                if (prim.material) {
                    matIdx = static_cast<std::int32_t>(prim.material - data->materials);
                    meshDoc.MaterialSlots.push_back(matIdx);
                }
                
                MetaCoreMeshSubMeshDocument subMesh;
                subMesh.Name = "Primitive_" + std::to_string(p);
                subMesh.MaterialSlotIndex = matIdx;
                genMesh.SubMeshes.push_back(std::move(subMesh));
            }

            document.Meshes.push_back(std::move(meshDoc));
            document.GeneratedMeshAssets.push_back(std::move(genMesh));
        }
    }

    if (data->nodes_count > 0) {
        for (std::size_t i = 0; i < data->nodes_count; ++i) {
            const cgltf_node& node = data->nodes[i];
            MetaCoreImportedGltfNodeDocument nodeDoc;
            nodeDoc.Name = node.name ? node.name : ("Node_" + std::to_string(i));
            nodeDoc.ParentIndex = node.parent ? static_cast<std::int32_t>(node.parent - data->nodes) : -1;
            nodeDoc.MeshIndex = node.mesh ? static_cast<std::int32_t>(node.mesh - data->meshes) : -1;
            document.Nodes.push_back(std::move(nodeDoc));
        }
    } else {
        MetaCoreImportedGltfNodeDocument rootNode;
        rootNode.Name = absoluteSourcePath.stem().string();
        document.Nodes.push_back(std::move(rootNode));
    }

    cgltf_free(data);
    return document;
}

[[nodiscard]] MetaCoreModelAssetDocument MetaCoreBuildImportedGenericModelAssetDocument'''

new_text = pattern.sub(replacement, text)
if text == new_text:
    print('Failed to replace.')
else:
    print('Successfully replaced.')

with codecs.open(path, 'w', 'utf-8') as f:
    f.write(new_text)