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file_sys: Consolidate separate update directory handling. (#2041)

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squidbus 2025-01-08 03:23:40 -08:00 • committed by GitHub
parent af8c748e9c
commit 8f5bcb0f1c
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GPG key ID: B5690EEEBB952194
5 changed files with 61 additions and 107 deletions
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44
src/core/file_sys/fs.cpp
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@ -40,7 +40,8 @@ void MntPoints::UnmountAll() {
m_mnt_pairs.clear();
}
std::filesystem::path MntPoints::GetHostPath(std::string_view path, bool* is_read_only) {
std::filesystem::path MntPoints::GetHostPath(std::string_view path, bool* is_read_only,
bool force_base_path) {
// Evil games like Turok2 pass double slashes e.g /app0//game.kpf
std::string corrected_path(path);
size_t pos = corrected_path.find("//");
@ -72,7 +73,7 @@ std::filesystem::path MntPoints::GetHostPath(std::string_view path, bool* is_rea
patch_path /= rel_path;
if ((corrected_path.starts_with("/app0") || corrected_path.starts_with("/hostapp")) &&
std::filesystem::exists(patch_path)) {
!force_base_path && std::filesystem::exists(patch_path)) {
return patch_path;
}
@ -132,8 +133,10 @@ std::filesystem::path MntPoints::GetHostPath(std::string_view path, bool* is_rea
return std::optional<std::filesystem::path>(current_path);
};
if (const auto path = search(patch_path)) {
return *path;
if (!force_base_path) {
if (const auto path = search(patch_path)) {
return *path;
}
}
if (const auto path = search(host_path)) {
return *path;
@ -144,6 +147,39 @@ std::filesystem::path MntPoints::GetHostPath(std::string_view path, bool* is_rea
return host_path;
}
// TODO: Does not handle mount points inside mount points.
void MntPoints::IterateDirectory(std::string_view guest_directory,
const IterateDirectoryCallback& callback) {
const auto base_path = GetHostPath(guest_directory, nullptr, true);
const auto patch_path = GetHostPath(guest_directory, nullptr, false);
// Only need to consider patch path if it exists and does not resolve to the same as base.
const auto apply_patch = base_path != patch_path && std::filesystem::exists(patch_path);
// Pass 1: Any files that existed in the base directory, using patch directory if needed.
if (std::filesystem::exists(base_path)) {
for (const auto& entry : std::filesystem::directory_iterator(base_path)) {
if (apply_patch) {
const auto patch_entry_path = patch_path / entry.path().filename();
if (std::filesystem::exists(patch_entry_path)) {
callback(patch_entry_path, !std::filesystem::is_directory(patch_entry_path));
continue;
}
}
callback(entry.path(), !entry.is_directory());
}
}
// Pass 2: Any files that exist only in the patch directory.
if (apply_patch) {
for (const auto& entry : std::filesystem::directory_iterator(patch_path)) {
const auto base_entry_path = base_path / entry.path().filename();
if (!std::filesystem::exists(base_entry_path)) {
callback(entry.path(), !entry.is_directory());
}
}
}
}
int HandleTable::CreateHandle() {
std::scoped_lock lock{m_mutex};