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Git.cpp
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Git.cpp
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#include "Git.h"
#include <QDir>
#include <QProcess>
#include <QUuid>
#include <QMessageBox>
#include <QFile>
#include <QTextStream>
#include <stdexcept>
#include <iostream>
using namespace std::literals;
Git::Git(QString gitUrl, QString login, const QString& password)
: m_gitCredUrl([&]{
return std::move(gitUrl.replace("https://", "https://" + login + ":" + password + "@"));
}()),
m_gitLogin{std::move(login)},
m_gitRepoPath{QDir::tempPath() + QDir::separator() + QUuid::createUuid().toString()},
m_gitMessagesPath{m_gitRepoPath + QDir::separator() + "messages"}
{
CloneRepo();
if(IsNewRepo())
InitRepo();
QMessageBox m;
m.show();
m_isRunning = true;
m_newMsgThread = std::thread{[this]{
while(m_isRunning)
{
std::this_thread::sleep_for(4s);
if(m_toSend.empty())
continue;
std::lock_guard guard{m_mutex};
{
QFile file(m_gitMessagesPath);
if(!file.open(QIODevice::Append)) {
throw std::runtime_error{file.errorString().toUtf8()};
}
if(m_messagePos > file.size())
throw std::runtime_error{"New message db is smaller then old"};
QTextStream in(&file);
in.setCodec("UTF-8");
while(!m_toSend.empty())
{
std::tuple<QString, QString, QString> nextMsg;
m_toSend.wait_and_pop(nextMsg);
in << '\n' << std::get<0>(nextMsg).toUtf8() << "," << std::get<1>(nextMsg).toUtf8() << "," << std::get<2>(nextMsg).toUtf8();
}
in.flush();
}
std::this_thread::sleep_for(1s);
#ifndef __WIN32
QProcess::execute("sync; echo 3 | sudo tee /proc/sys/vm/drop_caches");
#endif
std::this_thread::sleep_for(1s);
ExecuteGit("add messages");
ExecuteGit("commit -m\"Git::PushMessage\"");
std::cout << "\nPRE_PUSH\n";
while(0 != ExecuteGit2("push"))
{
std::cout << "\nPRE_PULL\n";
std::this_thread::sleep_for(1s);
if(0 != ExecuteGit2("pull"))
{
std::cout << "\nFIX_CONFLICTS\n";
FixConflicts();
}
}
}
}};
}
Git::~Git()
{
m_isRunning = false;
if(m_newMsgThread.joinable())
m_newMsgThread.join();
try {
QDir{m_gitRepoPath}.removeRecursively();
} catch (const std::exception& err) {
std::cerr << "Git::~Git() has failed: " << err.what();
}
}
bool Git::IsNewRepo() const
{
return !QFile{m_gitMessagesPath}.exists();
}
void Git::InitRepo()
{
QFile file(m_gitMessagesPath);
file.open(QIODevice::WriteOnly);
file.close();
ExecuteGit("add messages");
ExecuteGit("commit -m\"Git::InitRepo()\"");
ExecuteGit("push");
}
void Git::PushMessage(const QString& author, const QString& message)
{
auto newGuid = QUuid::createUuid().toString();
{
std::lock_guard _{m_presendMsgGuids_mutex};
m_presendMsgGuids.insert(newGuid);
}
m_toSend.push({newGuid, author, message});
}
void Git::FixConflicts()
{
#ifdef __WIN32
{
QFile file(m_gitMessagesPath);
if(!file.open(QIODevice::ReadWrite | QIODevice::Append)) {
throw std::runtime_error{file.errorString().toUtf8()};
}
if(m_messagePos > file.size())
throw std::runtime_error{"New message db is smaller then old"};
{
QTextStream in(&file);
in.setCodec("UTF-8");
if(!in.seek(0))
throw std::runtime_error{"if(!file.seek(m_messagePos))"};
QString textWithoutConflits;
while(!in.atEnd()) {
QString line = in.readLine();
if(!line.startsWith("{"))
continue;
textWithoutConflits += line += '\n';
}
if(!in.seek(0))
throw std::runtime_error{"if(!file.seek(m_messagePos))"};
in << textWithoutConflits.toUtf8();
in.flush();
}
if(!file.resize(file.pos()))
throw std::runtime_error{"if(!file.resize(file.pos()))"};
file.flush();
}
std::this_thread::sleep_for(1s);
#else
QProcess::execute("sed -i \"s/<.*//g\" " + m_gitMessagesPath);
QProcess::execute("sed -i \"s/>.*//g\" " + m_gitMessagesPath);
QProcess::execute("sed -i \"s/=.*//g\" " + m_gitMessagesPath);
QProcess::execute("sync; echo 3 | sudo tee /proc/sys/vm/drop_caches");
#endif
std::this_thread::sleep_for(1s);
std::cout << "\nPRE_ADD_MSG_CONF\n";
ExecuteGit("add messages");
std::cout << "\nPRE_FIX_CONFLICT_COMMIT_CONF\n";
ExecuteGit("commit -m\"Git::FixConflicts\"");
}
std::queue<std::pair<QString, QString>> Git::GetNewMessages()
{
std::lock_guard guard{m_mutex};
ExecuteGit("pull");
QFile file(m_gitMessagesPath);
if(!file.open(QIODevice::ReadOnly)) {
throw std::runtime_error{file.errorString().toUtf8()};
}
if(m_messagePos > file.size())
throw std::runtime_error{"New message db is smaller then old"};
QTextStream in(&file);
in.setCodec("UTF-8");
if(!in.seek(m_messagePos))
throw std::runtime_error{"if(!file.seek(m_messagePos))"};
std::queue<std::pair<QString, QString>> messages;
while(!in.atEnd()) {
QString line = in.readLine();
if(line.size() == 0)
continue;
QStringList fields = line.split(",");
if(fields.size() != 3)
throw std::runtime_error{"Corrupted messages file"};
bool isMsgWasPresended = false;
{
std::lock_guard _{m_presendMsgGuids_mutex};
auto findIt = m_presendMsgGuids.find(fields[0]);
if(m_presendMsgGuids.end() != findIt)
{
isMsgWasPresended = true;
}
else
{
m_presendMsgGuids.emplace(fields[0]);
}
}
if(!isMsgWasPresended)
messages.emplace(std::move(fields[1]), std::move(fields[2]));
}
m_messagePos = 0;
return messages;
}
void Git::CloneRepo()
{
if(QDir{m_gitRepoPath}.exists())
throw std::runtime_error{("The directory " + m_gitRepoPath + " already exist").toUtf8()};
QDir().mkdir(m_gitRepoPath);
ExecuteGit(QString{"clone "} + m_gitCredUrl + " " + m_gitRepoPath);
}
void Git::ExecuteGit(const QString& command)
{
std::lock_guard guard{gc_mutex};
auto gitCommand = "git -C \"" + m_gitRepoPath + "\" "
+ "-c user.name='" + m_gitLogin + "' -c user.email='<>' "
+ command;
if(0 != QProcess::execute(gitCommand))
throw std::runtime_error{("The command \"" + gitCommand + "\" has failed").toUtf8()};
}
int Git::ExecuteGit2(const QString& command)
{
std::lock_guard guard{gc_mutex};
auto gitCommand = "git -C \"" + m_gitRepoPath + "\" "
+ "-c user.name='" + m_gitLogin + "' -c user.email='<>' "
+ command;
return QProcess::execute(gitCommand);
}