mirror of
https://github.com/Dingo-Shenanigans/ReSkate.git
synced 2026-10-17 17:27:19 +02:00
Bortlesboat
c9a7dfce38
Only replace a nested metadata file when the package supplies a matching top-level file. Cover ZIP and folder installs with partial metadata and case-insensitive package overrides.
408 lines
19 KiB
C++
408 lines
19 KiB
C++
#include "mod_manager.h"
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#include "text_encoding.h"
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#include "Engine/Vfs/mod_list.h"
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#include "Engine/Core/Json/json.h"
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#include "Engine/Core/Platform/launcher_support.h"
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#include <Windows.h>
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#include <shellapi.h>
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#include <miniz.h>
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#include <algorithm>
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#include <array>
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#include <cstdio>
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#include <fstream>
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#include <optional>
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#include <string_view>
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#include <vector>
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namespace fs = std::filesystem;
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namespace dingosdk::launcher_mods {
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namespace {
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// What the game loads from a mod, and the files that only describe one.
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constexpr std::array<std::string_view, 2> content_markers{"layout.toc", "reskate-levels.json"};
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constexpr std::array<std::string_view, 2> info_markers{"manifest.json", "reskate-mod.json"};
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// Thunderstore requires these at the top of a package (lower case here); they
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// follow the mod in when it is packed one folder deeper.
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constexpr std::array<std::string_view, 4> package_files{"manifest.json", "icon.png", "readme.md", "changelog.md"};
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constexpr char no_mod[] = " does not contain a ReSkate mod (no layout.toc, reskate-levels.json or manifest.json).";
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// Staging lives inside Mods so the final move is a rename on one volume; the
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// leading dot keeps the runtime from ever treating it as a mod.
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constexpr wchar_t staging_folder[] = L".reskate-install";
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[[noreturn]] void fail(const std::string& message) { throw std::runtime_error(message); }
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std::string lower(std::string_view text) {
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std::string result(text);
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for (auto& ch : result) if (ch >= 'A' && ch <= 'Z') ch = static_cast<char>(ch + ('a' - 'A'));
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return result;
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}
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using launcher_text::utf8;
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fs::path from_utf8(std::string_view value) {
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const auto length = MultiByteToWideChar(CP_UTF8, 0, value.data(), static_cast<int>(value.size()), nullptr, 0);
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std::wstring output(static_cast<std::size_t>(std::max(length, 0)), L'\0');
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MultiByteToWideChar(CP_UTF8, 0, value.data(), static_cast<int>(value.size()), output.data(), length);
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return output;
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}
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// Folder names travel into engine paths (mod_list's valid_mod_name), so map
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// anything else to '_' rather than refusing the mod.
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std::string folder_name(std::string_view proposed) {
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std::string name;
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for (const auto value : proposed) {
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const auto ch = static_cast<unsigned char>(value);
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const bool plain = (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || (ch >= '0' && ch <= '9') ||
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value == '_' || value == '-' || value == '.' || value == ' ';
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name += plain ? value : '_';
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}
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while (!name.empty() && (name.front() == '.' || name.front() == ' ')) name.erase(name.begin());
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while (!name.empty() && (name.back() == '.' || name.back() == ' ')) name.pop_back();
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if (name.size() > mods::maximum_mod_name) name.resize(mods::maximum_mod_name);
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if (name.empty()) name = "Mod";
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return name;
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}
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template<std::size_t N> bool one_of(const std::array<std::string_view, N>& names, std::string_view file) {
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return std::find(names.begin(), names.end(), lower(file)) != names.end();
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}
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std::string last_folder(const std::string& folder) {
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auto trimmed = folder;
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if (!trimmed.empty() && trimmed.back() == '/') trimmed.pop_back();
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const auto slash = trimmed.rfind('/');
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return slash == std::string::npos ? trimmed : trimmed.substr(slash + 1);
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}
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struct Root {
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std::string folder; // "a/b/", or "" for the top
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bool content{}; // holds something the game loads
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};
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// The shallowest folder holding game content (layout.toc, reskate-levels.json
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// or parks/<map>.park.json), else the shallowest holding only a description.
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// Content wins so a package's own manifest.json at the top cannot hide a mod
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// packed one folder down.
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std::optional<Root> mod_root(const std::vector<std::string>& files) {
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std::optional<std::string> content, info;
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std::size_t content_depth = SIZE_MAX, info_depth = SIZE_MAX;
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for (const auto& file : files) {
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const auto slash = file.rfind('/');
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auto folder = slash == std::string::npos ? std::string() : file.substr(0, slash + 1);
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const auto leaf = slash == std::string::npos ? file : file.substr(slash + 1);
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bool is_content = one_of(content_markers, leaf);
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if (!is_content && lower(leaf).ends_with(".park.json") && lower(last_folder(folder)) == "parks") {
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folder.resize(folder.size() - std::string_view("parks/").size());
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is_content = true;
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}
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const auto depth = static_cast<std::size_t>(std::count(folder.begin(), folder.end(), '/'));
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if (is_content && depth < content_depth) { content = folder; content_depth = depth; }
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if (!is_content && one_of(info_markers, leaf) && depth < info_depth) { info = folder; info_depth = depth; }
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}
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if (content) return Root{*content, true};
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if (info) return Root{*info, false};
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return std::nullopt;
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}
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// A file at the top of the source that goes into a mod found deeper:
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// Thunderstore's package files, when the top has a manifest.json (else they
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// are not a package's).
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bool carried(const Root& root, const std::vector<std::string>& files, const std::string& file) {
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if (root.folder.empty() || file.find('/') != std::string::npos || !one_of(package_files, file)) return false;
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return std::any_of(files.begin(), files.end(), [](const std::string& top) { return lower(top) == "manifest.json"; }) &&
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std::any_of(files.begin(), files.end(), [&](const std::string& top) { return lower(top) == lower(file); });
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}
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// Where a file of the source goes inside the mod, if anywhere. Carried package
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// files replace the mod's own copies of them.
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std::optional<std::string> relative_in_mod(const Root& root, const std::vector<std::string>& files, const std::string& file) {
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if (carried(root, files, file)) return file;
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if (!file.starts_with(root.folder)) return std::nullopt;
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auto relative = file.substr(root.folder.size());
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if (relative.empty() || carried(root, files, relative)) return std::nullopt;
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return relative;
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}
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// "Team-Map-1.2.3" (a zip downloaded from Thunderstore) installs as Team-Map,
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// the folder the launcher's own Thunderstore installs use.
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std::string without_version(std::string name) {
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const auto dash = name.rfind('-');
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if (dash == std::string::npos || dash == 0) return name;
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const std::string_view version(name.data() + dash + 1, name.size() - dash - 1);
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if (std::count(version.begin(), version.end(), '.') != 2 || version.empty() || version.front() == '.' ||
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version.back() == '.' || version.find("..") != std::string_view::npos ||
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version.find_first_not_of("0123456789.") != std::string_view::npos) return name;
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name.resize(dash);
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return name;
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}
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std::string mod_name(const Root& root, const std::string& source_name, const InstallOptions& options) {
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if (!options.folder.empty()) return folder_name(options.folder);
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return folder_name(root.folder.empty() ? without_version(source_name) : last_folder(root.folder));
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}
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// Last steps in staging: a source that gives the game nothing to load is
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// refused when asked, and the author goes into manifest.json.
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void finish(const fs::path& staging, const Root& root, const std::string& source_name, const InstallOptions& options) {
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if (options.require_content && !root.content)
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fail(source_name + " has nothing for ReSkate to load: no layout.toc, reskate-levels.json or parks folder. "
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"Only mods built with ReSkate Studio, and park mods, can be installed.");
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const auto manifest = staging / mods::manifest_file;
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std::error_code error;
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if (options.author.empty() || !fs::is_regular_file(manifest, error)) return;
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try {
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std::string text;
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{
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std::ifstream input(manifest, std::ios::binary);
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text.assign(std::istreambuf_iterator<char>(input), {});
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}
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if (text.starts_with("\xef\xbb\xbf")) text.erase(0, 3);
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auto json = Json::parse(text, JsonLimits{1024 * 1024, 16, 65536});
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if (!json.is_object()) return;
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if (json.contains("author") && json.at("author").is_string() && !json.at("author").string().empty()) return;
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json.items()["author"] = Json(options.author);
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std::ofstream(manifest, std::ios::binary | std::ios::trunc) << json.dump(4) << '\n';
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} catch (...) {
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// An unreadable manifest is the mod's own business; the game reports it.
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}
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}
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// Entry names from an archive are untrusted: no absolute paths, drive
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// letters, alternate streams or parent references may leave the target.
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std::optional<std::string> safe_entry(std::string name) {
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std::replace(name.begin(), name.end(), '\\', '/');
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if (name.empty() || name.front() == '/' || name.find(':') != std::string::npos) return std::nullopt;
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std::string_view rest(name);
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while (!rest.empty()) {
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const auto slash = rest.find('/');
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const auto part = rest.substr(0, slash);
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if (part == "..") return std::nullopt;
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if (slash == std::string_view::npos) break;
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rest.remove_prefix(slash + 1);
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}
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if (name.starts_with("__MACOSX/")) return std::string();
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return name;
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}
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// Package sizes come from the zip itself, so refuse one that would fill the drive.
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void check_free_space(const fs::path& mods, std::uint64_t needed) {
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ULARGE_INTEGER available{};
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if (!GetDiskFreeSpaceExW(mods.c_str(), &available, nullptr, nullptr)) return;
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constexpr std::uint64_t reserve = 1ull << 30;
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if (needed > available.QuadPart || available.QuadPart - needed < reserve)
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fail("This mod needs " + std::to_string(needed >> 20) + " MB, more than the drive has free.");
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}
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void recycle(const fs::path& path) {
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std::wstring from = path.wstring();
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from.push_back(L'\0'); // SHFileOperation takes a double-terminated list.
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SHFILEOPSTRUCTW operation{};
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operation.wFunc = FO_DELETE;
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operation.pFrom = from.c_str();
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operation.fFlags = FOF_ALLOWUNDO | FOF_NOCONFIRMATION | FOF_WANTNUKEWARNING | FOF_SILENT | FOF_NOERRORUI;
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if (SHFileOperationW(&operation) != 0 || operation.fAnyOperationsAborted)
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fail("Could not move " + utf8(path.filename().wstring()) + " to the Recycle Bin. Close anything using its files and try again.");
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}
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class Staging {
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public:
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Staging(const fs::path& mods, const std::string& name) : path_(mods / staging_folder / from_utf8(name)) {
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std::error_code error;
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fs::remove_all(path_, error);
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fs::create_directories(path_);
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}
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~Staging() {
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std::error_code error;
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fs::remove_all(path_.parent_path(), error);
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}
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const fs::path& path() const { return path_; }
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private:
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fs::path path_;
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};
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// Moves the finished staging folder into place, replacing only when asked.
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void commit(const fs::path& mods, const Staging& staging, const std::string& name, bool replace) {
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const auto target = mods / from_utf8(name);
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std::error_code error;
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if (fs::exists(target, error)) {
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if (!replace) throw AlreadyInstalled(name);
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recycle(target);
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}
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if (!MoveFileExW(staging.path().c_str(), target.c_str(), MOVEFILE_WRITE_THROUGH))
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fail("Could not move the mod into the Mods folder (Windows error " + std::to_string(GetLastError()) + ").");
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}
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// miniz is built without stdio, so the archive is read through a handle.
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struct Zip {
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mz_zip_archive archive{};
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HANDLE file{INVALID_HANDLE_VALUE};
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~Zip() {
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mz_zip_reader_end(&archive);
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if (file != INVALID_HANDLE_VALUE) CloseHandle(file);
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}
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};
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std::size_t read_at(void* opaque, mz_uint64 offset, void* buffer, std::size_t size) {
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OVERLAPPED position{};
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position.Offset = static_cast<DWORD>(offset);
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position.OffsetHigh = static_cast<DWORD>(offset >> 32);
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DWORD read{};
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if (size > MAXDWORD || !ReadFile(static_cast<HANDLE>(opaque), buffer, static_cast<DWORD>(size), &read, &position)) return 0;
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return read;
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}
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struct Sink {
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FILE* file{};
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std::uint64_t* written{};
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std::uint64_t total{};
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const Progress* progress{};
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const std::atomic<bool>* cancel{};
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};
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std::size_t write_chunk(void* opaque, mz_uint64, const void* data, std::size_t size) {
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auto& sink = *static_cast<Sink*>(opaque);
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if (sink.cancel->load()) return 0;
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if (std::fwrite(data, 1, size, sink.file) != size) return 0;
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*sink.written += size;
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if (*sink.progress && sink.total) (*sink.progress)(static_cast<float>(*sink.written) / static_cast<float>(sink.total));
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return size;
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}
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std::string install_zip(const fs::path& mods, const fs::path& source, bool replace,
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const Progress& progress, const std::atomic<bool>& cancel, const InstallOptions& options) {
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Zip zip;
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zip.file = CreateFileW(source.c_str(), GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING,
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FILE_FLAG_SEQUENTIAL_SCAN, nullptr);
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LARGE_INTEGER size{};
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if (zip.file == INVALID_HANDLE_VALUE || !GetFileSizeEx(zip.file, &size))
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fail("Could not open " + utf8(source.filename().wstring()) + ".");
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zip.archive.m_pRead = read_at;
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zip.archive.m_pIO_opaque = zip.file;
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if (size.QuadPart <= 0 || !mz_zip_reader_init(&zip.archive, static_cast<mz_uint64>(size.QuadPart), 0))
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fail(utf8(source.filename().wstring()) + " is not a readable .zip file.");
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struct Entry { mz_uint index; std::string name; bool directory; std::uint64_t size; };
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std::vector<Entry> entries;
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std::vector<std::string> files;
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const auto count = mz_zip_reader_get_num_files(&zip.archive);
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for (mz_uint index = 0; index < count; ++index) {
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mz_zip_archive_file_stat stat{};
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if (!mz_zip_reader_file_stat(&zip.archive, index, &stat)) fail("The .zip file is damaged.");
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const auto name = safe_entry(stat.m_filename);
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if (!name) fail("The .zip file contains an unsafe path (" + std::string(stat.m_filename) + "); it was not installed.");
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if (name->empty()) continue;
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const bool directory = mz_zip_reader_is_file_a_directory(&zip.archive, index);
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entries.push_back({index, *name, directory, stat.m_uncomp_size});
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if (!directory) files.push_back(*name);
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}
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const auto root = mod_root(files);
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if (!root) fail(utf8(source.filename().wstring()) + no_mod);
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const auto name = mod_name(*root, utf8(source.stem().wstring()), options);
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std::error_code error;
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if (!replace && fs::exists(mods / from_utf8(name), error)) throw AlreadyInstalled(name);
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std::uint64_t total = 0, written = 0;
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for (const auto& entry : entries)
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if (!entry.directory && relative_in_mod(*root, files, entry.name)) total += entry.size;
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check_free_space(mods, total);
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Staging staging(mods, name);
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for (const auto& entry : entries) {
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if (cancel) fail("Install cancelled.");
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const auto mapped = relative_in_mod(*root, files, entry.name);
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if (!mapped) continue;
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const auto& relative = *mapped;
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const auto target = staging.path() / from_utf8(relative);
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if (entry.directory) { fs::create_directories(target); continue; }
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fs::create_directories(target.parent_path());
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FILE* output{};
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if (_wfopen_s(&output, target.c_str(), L"wb") || !output) fail("Could not write " + relative + ".");
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Sink sink{output, &written, total, &progress, &cancel};
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const bool ok = mz_zip_reader_extract_to_callback(&zip.archive, entry.index, write_chunk, &sink, 0);
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std::fclose(output);
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if (cancel) fail("Install cancelled.");
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if (!ok) fail("Could not extract " + relative + " from the .zip file.");
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}
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finish(staging.path(), *root, utf8(source.filename().wstring()), options);
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commit(mods, staging, name, replace);
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return name;
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}
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std::string install_folder(const fs::path& mods, const fs::path& source, bool replace,
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const Progress& progress, const std::atomic<bool>& cancel, const InstallOptions& options) {
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std::vector<std::string> files;
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std::vector<fs::path> paths;
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for (auto it = fs::recursive_directory_iterator(source); it != fs::recursive_directory_iterator(); ++it) {
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if (!it->is_regular_file()) continue;
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paths.push_back(it->path());
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auto relative = utf8(fs::relative(it->path(), source).generic_wstring());
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files.push_back(std::move(relative));
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}
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const auto root = mod_root(files);
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if (!root) fail(utf8(source.filename().wstring()) + no_mod);
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const auto name = mod_name(*root, utf8(source.filename().wstring()), options);
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std::error_code error;
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if (!replace && fs::exists(mods / from_utf8(name), error)) throw AlreadyInstalled(name);
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std::uint64_t total = 0, written = 0;
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for (std::size_t i = 0; i < files.size(); ++i)
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if (relative_in_mod(*root, files, files[i])) total += fs::file_size(paths[i]);
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Staging staging(mods, name);
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for (std::size_t i = 0; i < files.size(); ++i) {
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if (cancel) fail("Install cancelled.");
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const auto relative = relative_in_mod(*root, files, files[i]);
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if (!relative) continue;
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const auto target = staging.path() / from_utf8(*relative);
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fs::create_directories(target.parent_path());
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fs::copy_file(paths[i], target, fs::copy_options::overwrite_existing);
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written += fs::file_size(paths[i]);
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if (progress && total) progress(static_cast<float>(written) / static_cast<float>(total));
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}
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finish(staging.path(), *root, utf8(source.filename().wstring()), options);
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commit(mods, staging, name, replace);
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return name;
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}
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} // namespace
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fs::path mods_root(const fs::path& game_directory) {
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const auto data = launcher::mod_data_arguments(game_directory, {}).empty()
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? game_directory : game_directory / L"ModData" / L"Default";
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return data / mods::mods_folder;
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}
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std::string install(const fs::path& mods, const fs::path& source, bool replace,
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const Progress& progress, const std::atomic<bool>& cancel, const InstallOptions& options) {
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try {
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fs::create_directories(mods);
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std::error_code error;
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if (fs::is_directory(source, error)) {
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std::error_code same;
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if (fs::equivalent(source.parent_path(), mods, same))
|
|
fail(utf8(source.filename().wstring()) + " is already in the Mods folder.");
|
|
return install_folder(mods, source, replace, progress, cancel, options);
|
|
}
|
|
if (lower(utf8(source.extension().wstring())) != ".zip")
|
|
fail("Choose a .zip file or a mod folder to install.");
|
|
return install_zip(mods, source, replace, progress, cancel, options);
|
|
} catch (const AlreadyInstalled&) {
|
|
throw;
|
|
} catch (const fs::filesystem_error& failure) {
|
|
fail(std::string("Install failed: ") + failure.what());
|
|
}
|
|
}
|
|
|
|
void remove(const fs::path& mods, const std::string& name) {
|
|
if (!mods::valid_mod_name(name)) fail("\"" + name + "\" is not a mod folder.");
|
|
const auto target = mods / from_utf8(name);
|
|
std::error_code error;
|
|
if (!fs::is_directory(target, error)) fail("\"" + name + "\" is not installed.");
|
|
recycle(target);
|
|
}
|
|
|
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} // namespace dingosdk::launcher_mods
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