Method removeDeclarationFromFile

radiantcore/decl/DeclarationManager.cpp:478–529

}

void DeclarationManager::removeDeclarationFromFile(const IDeclaration::Ptr& decl)
{
    const auto& syntax = decl->getBlockSyntax();

    // Nothing to do if the decl hasn't been saved
    if (syntax.fileInfo.name.empty()) return;

    if (!syntax.fileInfo.getIsPhysicalFile())
    {
        throw std::logic_error("Only declarations stored in physical files can be removed.");
    }

    auto fullPath = GlobalFileSystem().findFile(syntax.fileInfo.fullPath());

    if (fullPath.empty() || !fs::exists(fullPath))
    {
        return;
    }

    fullPath += syntax.fileInfo.fullPath();

    // Load the syntax tree from the existing file
    std::ifstream existingFile(fullPath);

    if (!existingFile.is_open())
    {
        throw std::runtime_error(fmt::format(_("Cannot open file for reading: {0}"), fullPath));
    }

    // Parse the existing file into a syntax tree for manipulation
    parser::DefBlockSyntaxParser<std::istream> parser(existingFile);
    
    auto syntaxTree = parser.parse();
    existingFile.close();

    // Try to remove the decl from the syntax tree (using the original name)
    // Returns false if the decl could not be located (decl has not been saved to this file then)
    if (removeDeclarationFromSyntaxTree(syntaxTree, decl->getOriginalDeclName()))
    {
        // Open a temporary file
        stream::TemporaryOutputStream tempStream(fullPath);
        auto& stream = tempStream.getStream();

        // Move the old file to .bak before overwriting it
        os::moveToBackupFile(fullPath);

        // Export the modified syntax tree
        stream << syntaxTree->getString();

        tempStream.closeAndReplaceTargetFile();
    }
}

bool DeclarationManager::renameDeclaration(Type type, const std::string& oldName_Incoming, const std::string& newName)
{