Function get_cache_directory

common/hf-cache.cpp:38–68

namespace fs = std::filesystem;

static fs::path get_cache_directory() {
    static const fs::path cache = []() {
        struct {
            const char * var;
            fs::path path;
        } entries[] = {
            {"LLAMA_CACHE",           fs::path()},
            {"HF_HUB_CACHE",          fs::path()},
            {"HUGGINGFACE_HUB_CACHE", fs::path()},
            {"HF_HOME",               fs::path("hub")},
            {"XDG_CACHE_HOME",        fs::path("huggingface") / "hub"},
            {HOME_DIR,                fs::path(".cache") / "huggingface" / "hub"}
        };
        for (const auto & entry : entries) {
            if (auto * p = std::getenv(entry.var); p && *p) {
                fs::path base(p);
                return entry.path.empty() ? base : base / entry.path;
            }
        }
#ifndef _WIN32
        const struct passwd * pw = getpwuid(getuid());

        if (pw->pw_dir && *pw->pw_dir) {
            return fs::path(pw->pw_dir) / ".cache" / "huggingface" / "hub";
        }
#endif
        throw std::runtime_error("Failed to determine HF cache directory");
    }();

    return cache;
}

static std::string folder_name_to_repo(const std::string & folder) {
    constexpr std::string_view prefix = "models--";