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#include "reader.h"
#include <library/cpp/json/json_reader.h>
#include <library/cpp/json/json_value.h>
#include <util/generic/hash.h>
#include <util/memory/tempbuf.h>
#include <contrib/libs/libarchive/libarchive/archive.h>
#include <contrib/libs/libarchive/libarchive/archive_entry.h>
using namespace NJson;
namespace NZipatch {
class TReader::TImpl {
using TEntry = archive_entry;
public:
TImpl() {
if ((Archive_ = archive_read_new()) == nullptr) {
ythrow yexception() << "can't create archive object";
}
}
TImpl(const TFsPath& path)
: TImpl()
{
archive_read_support_filter_all(Archive_);
archive_read_support_format_zip(Archive_);
if (ARCHIVE_OK != archive_read_open_filename(Archive_, TString(path).c_str(), 10240)) {
ythrow yexception() << "can't open archive path = " << path;
}
Read();
}
TImpl(const TStringBuf buf)
: TImpl()
{
archive_read_support_filter_all(Archive_);
archive_read_support_format_zip(Archive_);
if (ARCHIVE_OK != archive_read_open_memory(Archive_, buf.data(), buf.size())) {
ythrow yexception() << "can't open in-memory archive";
}
Read();
}
~TImpl() {
for (const auto& item : Files_) {
archive_entry_free(item.second.first);
}
if (Archive_) {
archive_read_free(Archive_);
}
}
void Enumerate(TOnEvent cb) const {
for (const auto& item : Actions_) {
TEvent event;
event.Action = GetTypeFromString(item["type"].GetStringSafe(TString()));
event.Path = item["path"].GetStringSafe(TString());
event.Executable = item["executable"].GetBooleanSafe(false);
event.Symlink = false;
if (event.Action == Copy || event.Action == Move) {
event.Source.Path = item["orig_path"].GetStringSafe(TString());
event.Source.Revision = item["orig_revision"].GetUIntegerRobust();
}
if (event.Action == StoreFile) {
auto fi = Files_.find(event.Path);
if (fi == Files_.end()) {
ythrow yexception() << "can't find file; path = " << event.Path;
}
event.Data = fi->second.second;
event.Symlink = archive_entry_filetype(fi->second.first) == AE_IFLNK;
}
if (event.Path) {
cb(event);
}
}
}
private:
EAction GetTypeFromString(const TString& type) const {
if (type == "store_file") {
return StoreFile;
}
if (type == "mkdir") {
return MkDir;
}
if (type == "remove_file" || type == "remove_tree") {
return Remove;
}
if (type == "svn_copy") {
return Copy;
}
return Unknown;
}
void Read() {
TEntry* current = nullptr;
while (archive_read_next_header(Archive_, ¤t) == ARCHIVE_OK) {
const TStringBuf path(archive_entry_pathname(current));
if (path == "actions.json") {
TJsonValue value;
ReadJsonFastTree(GetData(current), &value, true);
for (const auto& item : value.GetArraySafe()) {
Actions_.push_back(item);
}
} else if (AsciiHasPrefix(path, "files/")) {
TEntry* entry = archive_entry_clone(current);
Files_.emplace(path.substr(6), std::make_pair(entry, GetData(current)));
}
}
archive_read_close(Archive_);
}
TString GetData(TEntry* current) const {
if (archive_entry_filetype(current) == AE_IFLNK) {
return archive_entry_symlink(current);
}
if (const auto size = archive_entry_size(current)) {
TTempBuf data(size);
if (archive_read_data(Archive_, data.Data(), size) != size) {
ythrow yexception() << "can't read entry";
}
return TString(data.Data(), size);
}
return TString();
}
private:
struct archive* Archive_;
TVector<TJsonValue> Actions_;
THashMap<TString, std::pair<TEntry*, TString>> Files_;
};
TReader::TReader(const TFsPath& path)
: Impl_(new TImpl(path))
{
}
TReader::TReader(const TStringBuf buf)
: Impl_(new TImpl(buf))
{
}
TReader::~TReader()
{ }
void TReader::Enumerate(TOnEvent cb) const {
Impl_->Enumerate(cb);
}
} // namespace NZipatch
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