Gerhard Hoffmann
da0fa54d28
Add important comment for the case that an remote host key change: 'git pull' handles the issue itself, and continues to pull the repository using the ssh-key provided in the .keys/ directory.
588 lines
25 KiB
C++
588 lines
25 KiB
C++
#include "git_client.h"
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#include "update.h"
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#include "worker.h"
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#include "utils.h"
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#include <QRegularExpression>
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#include <QDebug>
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#include <QDir>
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#include <QStringList>
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GitClient::GitClient(QString const &customerRepositoryPath,
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QString const &customerNrStr,
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QString const &customerRepository,
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QString const &workingDirectory,
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QString const &branchName,
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QObject *parent)
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: QObject(parent)
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, m_worker(qobject_cast<Worker *>(parent))
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, m_repositoryPath(customerRepositoryPath)
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, m_customerNr(customerNrStr)
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, m_workingDirectory(workingDirectory)
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, m_branchName(branchName)
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, m_customerRepository(customerRepository) {
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if (!m_worker) {
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qCritical() << "ERROR CASTING PARENT TO WORKER FAILED";
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}
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}
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bool GitClient::gitCloneCustomerRepository() {
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/* Blobless clone
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==============
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When using the --filter=blob:none option, the initial git clone will
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download all reachable commits and trees, and only download the blobs
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for commits when you do a git checkout. This includes the first checkout
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inside the git clone operation.
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The important thing to notice is that we have a copy of every blob at
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HEAD but the blobs in the history are not present. If your repository
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has a deep history full of large blobs, then this option can
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significantly reduce your git clone times. The commit and tree data is
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still present, so any subsequent git checkout only needs to download
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the missing blobs. The Git client knows how to batch these requests to
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ask the server only for the missing blobs.
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Further, when running git fetch in a blobless clone, the server only
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sends the new commits and trees. The new blobs are downloaded only
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after a git checkout. Note that git pull runs git fetch and then git
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merge, so it will download the necessary blobs during the git merge
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command.
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When using a blobless clone, you will trigger a blob download whenever
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you need the contents of a file, but you will not need one if you only
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need the OID (object-id) of a file. This means that git log can detect
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which commits changed a given path without needing to download extra
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data.
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This means that blobless clones can perform commands like git
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merge-base, git log, or even git log -- <path> with the same performance
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as a full clone.
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Commands like git diff or git blame <path> require the contents of the
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paths to compute diffs, so these will trigger blob downloads the first
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time they are run. However, the good news is that after that you will
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have those blobs in your repository and do not need to download them a
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second time. Most developers only need to run git blame on a small
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number of files, so this tradeoff of a slightly slower git blame command
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is worth the faster clone and fetch times.
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Note: git v2.18 does not support treeless clones: --filter=tree:0.
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*/
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// Note: for some reason it is necessary to pass "--progress ---v",
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// otherwise QProcess returns an error of 128 = 0x80 for the command.
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QString gitCommand("git clone --progress -vvv --filter=blob:none ");
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gitCommand += m_repositoryPath;
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Command c(gitCommand);
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qInfo() << "IN CURRENT WD" << m_workingDirectory
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<< "CLONE VIA COMMAND" << gitCommand;
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if (c.execute(m_workingDirectory)) { // execute the command in wd
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QString const result = c.getCommandResult();
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if (!result.isEmpty()) {
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// Cloning into 'customer_281'...\n
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int customer = -1;
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int cloning = result.indexOf("Cloning", 0, Qt::CaseInsensitive);
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if (cloning != -1) {
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customer = result.indexOf("customer_", cloning, Qt::CaseInsensitive);
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if (customer != -1) {
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QString customerNr = result.mid(customer);
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static constexpr char const ch = '\'';
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int i = customerNr.indexOf(QChar(ch));
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if (i != -1) {
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if ((customerNr = customerNr.mid(0, i)) == m_customerNr) {
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qInfo() << "CLONING" << m_repositoryPath << "OK";
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return true;
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}
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Utils::printCriticalErrorMsg(
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QString("ERROR CLONE RESULT HAS WRONG CUSTOMER-NR. (%1 != %2) CLONE_RESULT=%3")
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.arg(customerNr)
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.arg(m_customerNr)
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.arg(result));
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return false;
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}
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}
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}
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Utils::printCriticalErrorMsg(
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QString("ERROR CLONE RESULT HAS WRONG FORMAT. CLONING=%1 CUSTOMER=%2 CLONE_RESULT=%3")
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.arg(cloning)
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.arg(customer)
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.arg(result));
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return false;
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}
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Utils::printCriticalErrorMsg("ERROR CLONE RESULT IS EMPTY");
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}
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return false;
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}
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bool GitClient::copyGitConfigFromMaster() { // only allowed when called in
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// master branch (???)
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if (QDir(m_customerRepository).exists()) {
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QString const cp = QString("cp .gitconfig .git/config");
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Command c("bash");
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if (c.execute(m_customerRepository, QStringList() << "-c" << cp)) {
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qInfo() << "cp .gitconfig .git/config OK";
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return true;
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}
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qCritical() << "ERROR cp .gitconfig .git/config";
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}
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return false;
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}
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QStringList GitClient::gitBranchNames() {
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// git config --global pager.branch false
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QStringList bNames;
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if (QDir(m_customerRepository).exists()) {
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QString gitCommand("git branch -a");
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Command c(gitCommand);
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if (c.execute(m_customerRepository)) {
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QString const result = c.getCommandResult();
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return result.split('\n');
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}
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}
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return bNames;
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}
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bool GitClient::gitCheckoutBranch() {
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// TODO: nachsehen, ob der Branch ueberhaupt existiert
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if (QDir(m_customerRepository).exists()) {
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int zoneNr = Utils::read1stLineOfFile("/mnt/system_data/zone_nr");
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m_branchName = (zoneNr != 0)
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? QString("zg1/zone%1").arg(zoneNr) : "master";
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QString gitCommand("git checkout ");
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gitCommand += m_branchName;
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Command c(gitCommand);
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return c.execute(m_customerRepository); // execute command in customerRepo
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}
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Utils::printCriticalErrorMsg(QString("ERROR ") + m_customerRepository + " DOES NOT EXIST");
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return false;
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}
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bool GitClient::gitCloneAndCheckoutBranch() {
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qInfo() << "CLONE" << m_repositoryPath << "AND CHECKOUT" << m_branchName;
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if (gitCloneCustomerRepository()) {
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//if (copyGitConfigFromMaster()) {
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if (gitCheckoutBranch()) {
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return true;
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} else {
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// TODO
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}
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//}
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}
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Utils::printCriticalErrorMsg(QString("CLONE ") + m_repositoryPath + " AND CHECKOUT FAILED");
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return false;
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}
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QStringList GitClient::gitShowReason(QString branchName) {
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QStringList lst;
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if (QDir(m_customerRepository).exists()) {
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// %h: commit (short form)
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// %s: commit message
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// %cI: commit date, strict ISO 8601 format
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// Note: branch with branchName has to exist: format zg1/zone1
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Command c(QString("git show origin/%1 -s --format=\"c=%h m=%s d=%cI\"").arg(branchName));
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if (c.execute(m_customerRepository)) {
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QString const s = c.getCommandResult().trimmed();
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int const c = s.indexOf("c=");
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int const m = s.indexOf("m=");
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int const d = s.indexOf("d=");
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QString msg{""}; // IsmasClient::getReasonForLastSendVersion();
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QString commit{""}, date{""};
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if (c != -1) {
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int start = c + 2;
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if (m >= start) {
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int length = m - start;
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commit = s.mid(start, length).trimmed();
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start = m + 2;
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if (d >= start) {
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length = d - start;
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// msg = " (";
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msg = s.mid(start, length).trimmed();
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// msg += ")";
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start = d + 2;
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date = s.mid(start);
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}
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}
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if (!commit.isEmpty() && !msg.isEmpty() && !date.isEmpty()) {
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lst << commit << msg << date;
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}
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}
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}
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} else {
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qCritical() << "CUSTOMER_REPOSITORY" << m_customerRepository
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<< "DOES NOT EXIST";
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}
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return lst;
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}
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/*
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Zu beachten: wird eine datei neu hinzugefuegt (git add/commit) dann aber gleich
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wieder geloscht, so wird sie im diff nicht angezeigt.
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*/
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std::optional<QStringList> GitClient::gitDiff(QString const &commits) {
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if (QDir(m_customerRepository).exists()) {
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// 409f198..6c22726
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QString gitCommand("git diff --compact-summary ");
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gitCommand += commits;
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Command c(gitCommand);
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if (c.execute(m_customerRepository)) { // execute command in local customerRepo
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QString s = c.getCommandResult().trimmed();
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Utils::printInfoMsg("GIT DIFF RESULT " + s);
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QStringList lines = Update::split(s, '\n');
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QStringList fileNames;
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// each line has the format "etc/psa_config/DC2C_print01.json | 1 +
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// or the format "etc/psa_config/DC2C_print01.json (new) | 1 +
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// the filenames are relativ to the repository
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for (int i = 0; i < lines.size(); ++i) {
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QString const &line = lines.at(i);
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int newIndex = line.indexOf("(new"); // for new files
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int goneIndex = line.indexOf("(gone"); // for removed files
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int modeIndex = line.indexOf("(mode");
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int pipeIndex = line.indexOf('|');
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if (newIndex != -1) {
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QString file = line.left(newIndex).trimmed();
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qInfo() << "FILE (NEW)" << file;
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fileNames << file;
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} else
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if (modeIndex != -1) {
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QString const file = line.left(modeIndex).trimmed();
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qInfo() << "FILE (MODE)" << file;
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fileNames << file;
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} else
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if (goneIndex != -1) {
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QString const file = line.left(goneIndex).trimmed();
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qCritical() << "FILE (GONE)" << file;
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} else
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if (pipeIndex != -1) {
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QString const file = line.left(pipeIndex).trimmed();
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qInfo() << "FILE (PIPE)" << file;
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fileNames << file;
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}
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}
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if (!fileNames.isEmpty()) {
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return fileNames;
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}
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}
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}
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return std::nullopt;
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}
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bool GitClient::gitFsck() {
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bool r = false;
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if (QDir(m_customerRepository).exists()) {
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Command c("git fsck");
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if ((r = c.execute(m_customerRepository)) == false) {
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QString const &s = c.getCommandResult().trimmed();
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Utils::printCriticalErrorMsg(QString("GIT FSCK FAILED: %1").arg(s));
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}
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}
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return r;
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}
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bool GitClient::branchExistsRemotely() {
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bool remoteBranchExists = false;
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if (QDir(m_customerRepository).exists()) {
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qInfo() << "BRANCH NAME" << m_branchName;
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QString const cmd = QString("git ls-remote --exit-code --heads origin %1").arg(m_branchName);
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Command c(cmd);
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if (c.execute(m_customerRepository)) {
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// expected result: c16c833c8778c1b3691a74afee5a469177e4e69b refs/heads/zg1/zone1000
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QString const s = c.getCommandResult().trimmed();
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if (!s.isEmpty()) {
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// the result is only one line
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if ((remoteBranchExists = s.contains(m_branchName)) == true) {
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qCritical() << "(" << __func__ << ":" << __LINE__ << ") branch"
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<< m_branchName << "EXISTS REMOTELY. (" << s << ")";
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}
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} else {
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Utils::printCriticalErrorMsg(QString("EMPTY RESULT FOR CMD %1").arg(cmd));
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}
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} else {
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Utils::printCriticalErrorMsg(QString("FAILED TO EXEC '%1'").arg(cmd));
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}
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}
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return remoteBranchExists;
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}
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bool GitClient::branchExistsLocally() {
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Command c("git branch -l");
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if (c.execute(m_customerRepository)) {
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QString const s = c.getCommandResult().trimmed();
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if (!s.isEmpty()) {
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QStringList lines = Update::split(s, '\n');
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if (!lines.empty()) {
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for (int i=0; i < lines.size(); ++i) {
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QString line = lines.at(i);
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// expected: * [new branch] zg1/zone12 -> origin/zg1/zone12"
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if (line.contains(m_branchName)) {
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if (m_worker) {
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QStringList lst(QString("BRANCH-NAME %1 CONTAINED IN RESULT %2").arg(m_branchName).arg(s));
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m_worker->CONSOLE(lst) << Worker::UPDATE_STEP::PULL_NEW_BRANCH;
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}
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return true;
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}
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}
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if (m_worker) {
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QStringList lst(QString("BRANCH-NAME %1 NOT CONTAINED IN RESULT %2").arg(m_branchName).arg(s));
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m_worker->CONSOLE(lst) << Worker::UPDATE_STEP::PULL_NEW_BRANCH_FAILURE;
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}
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} else {
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if (m_worker) {
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QStringList lst(QString("'git branch -l' RETURNED NO LINES"));
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m_worker->CONSOLE(lst) << Worker::UPDATE_STEP::PULL_NEW_BRANCH_FAILURE;
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}
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}
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} else {
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if (m_worker) {
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QStringList lst(QString("'git branch -l' RETURNED EMPTY RESULT"));
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m_worker->CONSOLE(lst) << Worker::UPDATE_STEP::PULL_NEW_BRANCH_FAILURE;
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}
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}
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} else {
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if (m_worker) {
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QStringList lst(QString("FAILED TO EXEC 'git branch -l'"));
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m_worker->CONSOLE(lst) << Worker::UPDATE_STEP::PULL_NEW_BRANCH_FAILURE;
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}
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}
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return false;
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}
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bool GitClient::gitPullNewBranches() {
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if (QDir(m_customerRepository).exists()) {
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Command c("git pull");
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if (c.execute(m_customerRepository)) {
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QString const s = c.getCommandResult().trimmed();
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// expected: Already up-to-date.
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if (!s.isEmpty()) {
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QStringList lst;
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QString msg(QString("GIT-PULL-NEW-BRANCH. RESULT=%1").arg(s));
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if (m_worker) {
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m_worker->CONSOLE(lst) << Worker::UPDATE_STEP::PULL_NEW_BRANCH;
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}
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return true;
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}
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}
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}
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return false;
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}
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/*
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Hat sich nichts geaendert, so werden auch keine Commits <>..<> angezeigt
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*/
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std::optional<QString> GitClient::gitPull() {
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if (QDir(m_customerRepository).exists()) {
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qInfo() << "BRANCH NAME" << m_branchName;
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#if 0
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IMPORTANT COMMENT:
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If remote host keys are changed, then
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export GIT_SSH_COMMAND="ssh -i /opt/app/tools/atbupdate/.keys/id_ed25519_ptuConfig"
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git pull
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leads to the following warning/error message:
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
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Someone could be eavesdropping on you right now (man-in-the-middle attack)!
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It is also possible that a host key has just been changed.
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The fingerprint for the ECDSA key sent by the remote host is
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SHA256:vOD5jF2hglGktqLhK9ABxfEjwEgIK68/v9erdT05NDQ.
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Please contact your system administrator.
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Add correct host key in /home/root/.ssh/known_hosts to get rid of this message.
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Offending ECDSA key in /home/root/.ssh/known_hosts:1
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Password authentication is disabled to avoid man-in-the-middle attacks.
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Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.
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Agent forwarding is disabled to avoid man-in-the-middle attacks.
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X11 forwarding is disabled to avoid man-in-the-middle attacks.
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Already up to date.
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This first part is from ssh itself, and could not be fetched easily, as this
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process is gone when git itself starts.
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Only the last line is the git message.
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#endif
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Command c("git pull");
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if (c.execute(m_customerRepository)) {
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QString const s = c.getCommandResult().trimmed();
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if (!s.isEmpty()) {
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QStringList lines = Update::split(s, '\n');
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worker()->CONSOLE(lines) << Worker::UPDATE_STEP::UPDATE_REPOSITORY;
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if (!lines.empty()) {
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static const QRegularExpression alreadyUpToDate("^\\s*Already\\s+up\\s+to\\s+date.*$");
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if (std::none_of(lines.cbegin(), lines.cend(),
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[](QString const &s) { return s.contains(alreadyUpToDate); })) {
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int zoneNr = Utils::read1stLineOfFile("/mnt/system_data/zone_nr");
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m_branchName = (zoneNr != 0) ? QString("zg1/zone%1").arg(zoneNr) : "master";
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// lines can look like this:
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// From https://git.mimbach49.de/GerhardHoffmann/customer_281
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// 41ec581..5d25ac3 master -> origin/master
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// ff10f57..43530a1 zg1/zone1 -> origin/zg1/zone1
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// 6ed893f..5d9882c zg1/zone2 -> origin/zg1/zone2
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// 4384d17..77045d8 zg1/zone3 -> origin/zg1/zone3
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// 89d2812..36a0d74 zg1/zone5 -> origin/zg1/zone5
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//
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// More exactly:
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// remote: Counting objects: 382, done.
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// remote: Compressing objects: 100% (203/203), done.
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// remote: Total 278 (delta 177), reused 103 (delta 59)
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// Receiving objects: 100% (278/278), 4.89 MiB | 539 KiB/s, done.
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// Resolving deltas: 100% (177/177), completed with 40 local objects.
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// From ssh://longair@pacific.mpi-cbg.de/srv/git/fiji
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// 3036acc..9eb5e40 debian-release-20081030 -> origin/debian-release-20081030
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// * [new branch] debian-release-20081112 -> origin/debian-release-20081112
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// * [new branch] debian-release-20081112.1 -> origin/debian-release-20081112.1
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// 3d619e7..6260626 master -> origin/master
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//
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// The most important bits here are the lines like these:
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//
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// 3036acc..9eb5e40 debian-release-20081030 -> origin/debian-release-20081030
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// * [new branch] debian-release-20081112 -> origin/debian-release-20081112
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//
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// The first line of these two shows that your remote-tracking branch
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// origin/debian-release-20081030 has been advanced from the commit 3036acc to 9eb5e40.
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// The bit before the arrow is the name of the branch in the remote repository.
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// The second line similarly show that since we last did this, a new remote tracking
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// branch has been created. (git fetch may also fetch new tags if they have appeared
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// in the remote repository.)
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bool found = false;
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for (int i=0; i < lines.size(); ++i) {
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if (lines.at(i).contains(m_branchName)) {
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found = true;
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// 409f198..6c22726 zg1/zone1 -> origin/zg1/zone1
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static QRegularExpression re("(^\\s*)([0-9A-Fa-f]+..[0-9A-Fa-f]+)(.*$)");
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QRegularExpressionMatch match = re.match(lines.at(i));
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if (match.hasMatch()) {
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if (re.captureCount() == 3) { // start with full match (0), then the other 3 matches
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QString const matchCaptured = match.captured(2);
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worker()->CONSOLE(QStringList(matchCaptured)) << Worker::UPDATE_STEP::UPDATE_REPOSITORY;
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return matchCaptured;
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} else {
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QStringList lst(QString("(wrong capture count (%1)").arg(re.captureCount()));
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worker()->GUI(lst) << (worker()->CONSOLE(lst) << Worker::UPDATE_STEP::UPDATE_REPOSITORY_FAILURE);
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}
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} else {
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QStringList lst("no regex-match for commits");
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worker()->GUI(lst) << (worker()->CONSOLE(lst) << Worker::UPDATE_STEP::UPDATE_REPOSITORY_FAILURE);
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}
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}
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}
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if (!found) {
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QStringList lst(QString("unknown branch name ") + m_branchName);
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worker()->GUI(lst) << (worker()->CONSOLE(lst) << Worker::UPDATE_STEP::UPDATE_REPOSITORY_FAILURE);
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}
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} else {
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return "Already up to date";
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}
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} else {
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QStringList lst(QString("WRONG FORMAT FOR RESULT OF 'GIT PULL' ") + s);
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worker()->GUI(lst) << (worker()->CONSOLE(lst) << Worker::UPDATE_STEP::UPDATE_REPOSITORY_FAILURE);
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}
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} else {
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QStringList lst("EMPTY RESULT FOR 'GIT PULL'");
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worker()->GUI(lst) << (worker()->CONSOLE(lst) << Worker::UPDATE_STEP::UPDATE_REPOSITORY_FAILURE);
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}
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}
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} else {
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QStringList lst(QString("REPOSITORY ") + m_customerRepository + " DOES NOT EXIST");
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worker()->GUI(lst) << (worker()->CONSOLE(lst) << Worker::UPDATE_STEP::UPDATE_REPOSITORY_FAILURE);
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}
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return std::nullopt;
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}
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std::optional<QStringList> GitClient::gitMerge() {
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Command c("git merge");
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if (c.execute(m_workingDirectory)) {
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QString s = c.getCommandResult();
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QStringList lst = Update::split(s, '\n');
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return lst;
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}
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return std::nullopt;
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}
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QString GitClient::gitLastCommit(QString fileName) {
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if (QDir(m_customerRepository).exists()) {
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QString const filePath
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= QDir::cleanPath(m_customerRepository + QDir::separator() + fileName);
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if (QFile(filePath).exists()) {
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QString const gitCommand = QString("git log %1 | head -n 1").arg(fileName);
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Command c("bash");
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if (c.execute(m_customerRepository, QStringList() << "-c" << gitCommand)) {
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QString const r = c.getCommandResult();
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int const idx = r.indexOf("commit ");
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if (idx != -1) {
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return r.mid(idx + 8).trimmed();
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}
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}
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}
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}
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return "";
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}
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// fileName has to an absolute path
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QString GitClient::gitBlob(QString fileName) {
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QFileInfo fi(fileName);
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if (fi.exists()) {
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QString const gitCommand = QString("git hash-object %1").arg(fileName);
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Command c(gitCommand);
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if (c.execute("/tmp")) {
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return c.getCommandResult().trimmed();
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}
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}
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return "N/A";
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}
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QString GitClient::gitCommitForBlob(QString blob) {
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if (QDir(m_customerRepository).exists()) {
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QString const gitCommand
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= QString("git whatchanged --all --find-object=%1 | head -n 1").arg(blob);
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Command c(gitCommand);
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if (c.execute(m_customerRepository)) {
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return c.getCommandResult();
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}
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}
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return "";
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}
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bool GitClient::gitIsFileTracked(QString fName) {
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if (QDir(m_customerRepository).exists()) {
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QString const gitCommand
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= QString("git ls-files --error-unmatch %1").arg(fName);
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|
Command c(gitCommand);
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return c.execute(m_customerRepository);
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}
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return false;
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}
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//get_commit_for_blob () {
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// # search for the blob in all commits for the file(name) $1
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// echo $(git log --all --pretty=format:%H -- $2 |
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// xargs -I{} bash -c "git ls-tree {} -- $2 |
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// grep -q $1 && echo -n {} && head -n 1")
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//}
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