src/tint/utils/system/executable_file_mac.cc

// Copyright 2024 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// GEN_BUILD:CONDITION(tint_build_is_mac)

#include "src/tint/utils/system/executable_path.h"

#include <mach-o/dyld.h>
#include <sys/syslimits.h>
#include <filesystem>

#include "src/tint/utils/containers/vector.h"

std::string tint::ExecutablePath() {
    uint32_t bufsize = 0;
    auto result = _NSGetExecutablePath(nullptr, &bufsize);
    TINT_ASSERT(result == -1 && bufsize > 0);
    tint::Vector<char, PATH_MAX> buff;
    buff.Resize(bufsize + 1, 0);
    _NSGetExecutablePath(&buff[0], &bufsize);
    return &buff[0];
}

std::string tint::ExecutableDirectory() {
    return std::filesystem::path{ExecutablePath()}.remove_filename().string();
}