matlab/tools/addInstallDirToSearchPath.m

function addInstallDirToSearchPath(installDirPath, addInstallDirToSearchPath, addInstallDirToStartupFile)
    % addInstallDirToSearchPath Add the input path, INSTALLDIRPATH, to the 
    %                           MATLAB Search Path and save.
    %
    % Licensed to the Apache Software Foundation (ASF) under one or more
    % contributor license agreements.  See the NOTICE file distributed with
    % this work for additional information regarding copyright ownership.
    % The ASF licenses this file to you under the Apache License, Version
    % 2.0 (the "License"); you may not use this file except in compliance
    % with the License.  You may obtain a copy of the License at
    %
    %   http://www.apache.org/licenses/LICENSE-2.0
    %
    % Unless required by applicable law or agreed to in writing, software
    % distributed under the License is distributed on an "AS IS" BASIS,
    % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
    % implied.  See the License for the specific language governing
    % permissions and limitations under the License.

    if addInstallDirToSearchPath == "ON"
        addpath(installDirPath);
        status = savepath(fullfile(matlabroot, "toolbox", "local", "pathdef.m"));

        % Return exit code 1 to indicate savepath failure and 0 to indicate the path has
        % been saved successfully.
        if status == 0
            disp("Successfully added installation directory to the MATLAB Search Path: " + installDirPath);
            quit(0);
        else
            quit(1);
        end
    end

    if addInstallDirToStartupFile == "ON"
        fid = fopen(fullfile(userpath, "startup.m"), "a");
        if fid > 2
            count = fwrite(fid, "addpath(""" + installDirPath + """);");
            if count == 0
                % fwrite failed.
                quit(3);
            end
            status = fclose(fid);
            if status ~= 0
                % fclose failed.
                quit(4);
            end
        else
            % fopen failed.
            quit(2);
        end
        disp("Successfully appended an addpath command to the MATLAB startup.m file located at the userpath to add installation directory to the MATLAB Search Path: " + installDirPath);
        quit(0);
    end
end