export declare class CmakeUtils {
    /**
     * Scan the CMakeLists.txt files in the directory and obtain all dependent header file directories.
     * @param dir - the target project directory.
     * @returns - include directories set by CMakeLists.txt
     */
    static scanCMakeIncludeDirsOnly(dir: string): string[];
    /**
     * Get the variable and definition in the set statements, e.g. set(VAR value)
     * @param line - The line content in CMakeLists.
     * @returns - an array containing variable names and set values, or null
     */
    private static extractSetVar;
    /**
     * Recursively parse variables in current CMakeLists.
     * @param val - the definition of variables. e.g. set(VAR value)
     * @param varTable - variable definition record
     * @param depth - current recursive depth
     * @returns - include directory set by Set statement.
     */
    private static resolveCMakeVar;
    /**
     * Determine whether the current line is the start of include_directories or target_include_directories,
     * If so, enter the collection state and handle scenarios where a single line is immediately closed.
     * @param line - The line content in CMakeLists.
     * @param results - Include directories.
     * @returns new collecting state, funcType, buffer(supporting multi-line parameters).
     */
    private static tryStartCollectingIncludeDirs;
    /**
     * Extract all include directories from CMakeLists.
     * @param lines - All lines in CMakeLists.
     * @returns - include Directories.
     */
    private static extractAllIncludeDirs;
    /**
     * Parse parameters in line buffer.
     * @param buffer - line buffer.
     * @param isTarget - is it a target variable name
     * @returns - parameters.
     */
    private static parseCMakeArgs;
}
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