annotate src/hgrunner.cpp @ 425:ad106f5fe75f

Add "Ignore Files" and "Edit Ignored List" to Work menu (latter is subsumed from Advanced menu formerly).  Also subsume Serve via HTTP into File menu as Share Repository, and add a more helpful description of it. Remove Advanced menu

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    EasyMercurial

    Based on HgExplorer by Jari Korhonen
    Copyright (c) 2010 Jari Korhonen
    Copyright (c) 2011 Chris Cannam
    Copyright (c) 2011 Queen Mary, University of London
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "hgrunner.h"
#include "common.h"
#include "debug.h"
#include "settingsdialog.h"

#include <QPushButton>
#include <QListWidget>
#include <QDialog>
#include <QLabel>
#include <QVBoxLayout>
#include <QSettings>
#include <QInputDialog>
#include <QTemporaryFile>
#include <QDir>

#include <iostream>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>

#ifndef Q_OS_WIN32
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#endif

HgRunner::HgRunner(QString myDirPath, QWidget * parent) :
    QProgressBar(parent),
    m_myDirPath(myDirPath)
{
    m_proc = 0;

    // Always unbundle the extension: even if it already exists (in
    // case we're upgrading) and even if we're not going to use it (so
    // that it's available in case someone wants to use it later,
    // e.g. to fix a malfunctioning setup).  But the path we actually
    // prefer is the one in the settings first, if it exists; then the
    // unbundled one; then anything in the path if for some reason
    // unbundling failed
    unbundleExtension();

    setTextVisible(false);
    setVisible(false);
    m_isRunning = false;
}

HgRunner::~HgRunner()
{
    closeTerminal();
    if (m_proc) {
        m_proc->kill();
        m_proc->deleteLater();
    }
}

QString HgRunner::getUnbundledFileName()
{
    return SettingsDialog::getUnbundledExtensionFileName();
}

QString HgRunner::unbundleExtension()
{
    // Pull out the bundled Python file into a temporary file, and
    // copy it to our known extension location, replacing the magic
    // text NO_EASYHG_IMPORT_PATH with our installation location

    QString bundled = ":easyhg.py";
    QString unbundled = getUnbundledFileName();

    QString target = QFileInfo(unbundled).path();
    if (!QDir().mkpath(target)) {
        DEBUG << "Failed to make unbundle path " << target << endl;
        std::cerr << "Failed to make unbundle path " << target << std::endl;
        return ""; 
    }

    QFile bf(bundled);
    DEBUG << "unbundle: bundled file will be " << bundled << endl;
    if (!bf.exists() || !bf.open(QIODevice::ReadOnly)) {
        DEBUG << "Bundled extension is missing!" << endl;
        return "";
    }

    QTemporaryFile tmpfile(QString("%1/easyhg.py.XXXXXX").arg(target));
    tmpfile.setAutoRemove(false);
    DEBUG << "unbundle: temp file will be " << tmpfile.fileName() << endl;
    if (!tmpfile.open()) {
        DEBUG << "Failed to open temporary file " << tmpfile.fileName() << endl;
        std::cerr << "Failed to open temporary file " << tmpfile.fileName() << std::endl;
        return "";
    }

    QString all = QString::fromUtf8(bf.readAll());
    all.replace("NO_EASYHG_IMPORT_PATH", m_myDirPath);
    tmpfile.write(all.toUtf8());
    DEBUG << "unbundle: wrote " << all.length() << " characters" << endl;

    tmpfile.close();

    QFile ef(unbundled);
    if (ef.exists()) {
        DEBUG << "unbundle: removing old file " << unbundled << endl;
        ef.remove();
    }
    DEBUG << "unbundle: renaming " << tmpfile.fileName() << " to " << unbundled << endl;
    if (!tmpfile.rename(unbundled)) {
        DEBUG << "Failed to move temporary file to target file " << unbundled << endl;
        std::cerr << "Failed to move temporary file to target file " << unbundled << std::endl;
        return "";
    }
    
    DEBUG << "Unbundled extension to " << unbundled << endl;
    return unbundled;
}        

void HgRunner::requestAction(HgAction action)
{
    DEBUG << "requestAction " << action.action << endl;
    bool pushIt = true;
    if (m_queue.empty()) {
        if (action == m_currentAction) {
            // this request is identical to the thing we're executing
            DEBUG << "requestAction: we're already handling this one, ignoring identical request" << endl;
            pushIt = false;
        }
    } else {
        HgAction last = m_queue.back();
        if (action == last) {
            // this request is identical to the previous thing we
            // queued which we haven't executed yet
            DEBUG << "requestAction: we're already queueing this one, ignoring identical request" << endl;
            pushIt = false;
        }
    }
    if (pushIt) m_queue.push_back(action);
    checkQueue();
}

QString HgRunner::getHgBinaryName()
{
    QSettings settings;
    settings.beginGroup("Locations");
    return settings.value("hgbinary", "").toString();
}

QString HgRunner::getSshBinaryName()
{
    QSettings settings;
    settings.beginGroup("Locations");
    return settings.value("sshbinary", "").toString();
}

QString HgRunner::getExtensionLocation()
{
    QSettings settings;
    settings.beginGroup("Locations");
    QString extpath = settings.value("extensionpath", "").toString();
    if (extpath != "" && QFile(extpath).exists()) return extpath;
    return "";
}   

void HgRunner::started()
{
    DEBUG << "started" << endl;
    /*
    m_proc->write("blah\n");
    m_proc->write("blah\n");
    m_proc -> closeWriteChannel();
    */
}

void HgRunner::noteUsername(QString name)
{
    m_userName = name;
}

void HgRunner::noteRealm(QString realm)
{
    m_realm = realm;
}

void HgRunner::getUsername()
{
    if (m_ptyFile) {
        bool ok = false;
        QString prompt = tr("User name:");
        if (m_realm != "") {
            prompt = tr("User name for \"%1\":").arg(m_realm);
        }
        QString pwd = QInputDialog::getText
            (qobject_cast<QWidget *>(parent()),
            tr("Enter user name"), prompt,
            QLineEdit::Normal, QString(), &ok);
        if (ok) {
            m_ptyFile->write(QString("%1\n").arg(pwd).toUtf8());
            m_ptyFile->flush();
            return;
        } else {
            DEBUG << "HgRunner::getUsername: user cancelled" << endl;
            killCurrentCommand();
            return;
        }
    }
    // user cancelled or something went wrong
    DEBUG << "HgRunner::getUsername: something went wrong" << endl;
    killCurrentCommand();
}

void HgRunner::getPassword()
{
    if (m_ptyFile) {
        bool ok = false;
        QString prompt = tr("Password:");
        if (m_userName != "") {
            if (m_realm != "") {
                prompt = tr("Password for \"%1\" at \"%2\":")
                         .arg(m_userName).arg(m_realm);
            } else {
                prompt = tr("Password for user \"%1\":")
                         .arg(m_userName);
            }
        }
        QString pwd = QInputDialog::getText
            (qobject_cast<QWidget *>(parent()),
            tr("Enter password"), prompt,
             QLineEdit::Password, QString(), &ok);
        if (ok) {
            m_ptyFile->write(QString("%1\n").arg(pwd).toUtf8());
            m_ptyFile->flush();
            return;
        } else {
            DEBUG << "HgRunner::getPassword: user cancelled" << endl;
            killCurrentCommand();
            return;
        }
    }
    // user cancelled or something went wrong
    DEBUG << "HgRunner::getPassword: something went wrong" << endl;
    killCurrentCommand();
}

bool HgRunner::checkPrompts(QString chunk)
{
    //DEBUG << "checkPrompts: " << chunk << endl;

    if (!m_currentAction.mayBeInteractive()) return false;

    QString text = chunk.trimmed();
    QString lower = text.toLower();
    if (lower.endsWith("password:")) {
        getPassword();
        return true;
    }
    if (lower.endsWith("user:") || lower.endsWith("username:")) {
        getUsername();
        return true;
    }
    QRegExp userRe("\\buser(name)?:\\s*([^\\s]+)");
    if (userRe.indexIn(text) >= 0) {
        noteUsername(userRe.cap(2));
    }
    QRegExp realmRe("\\brealmr:\\s*([^\\s]+)");
    if (realmRe.indexIn(text) >= 0) {
        noteRealm(realmRe.cap(1));
    }
    return false;
}

void HgRunner::dataReadyStdout()
{
    DEBUG << "dataReadyStdout" << endl;
    if (!m_proc) return;
    QString chunk = QString::fromUtf8(m_proc->readAllStandardOutput());
    if (!checkPrompts(chunk)) {
        m_stdout += chunk;
    }
}

void HgRunner::dataReadyStderr()
{
    DEBUG << "dataReadyStderr" << endl;
    if (!m_proc) return;
    QString chunk = QString::fromUtf8(m_proc->readAllStandardError());
    DEBUG << chunk;
    if (!checkPrompts(chunk)) {
        m_stderr += chunk;
    }
}

void HgRunner::dataReadyPty()
{
    DEBUG << "dataReadyPty" << endl;
    QString chunk = QString::fromUtf8(m_ptyFile->readAll());
    DEBUG << "chunk of " << chunk.length() << " chars" << endl;
    if (!checkPrompts(chunk)) {
        m_stdout += chunk;
    }
}

void HgRunner::error(QProcess::ProcessError)
{
    finished(-1, QProcess::CrashExit);
}

void HgRunner::finished(int procExitCode, QProcess::ExitStatus procExitStatus)
{
	if (!m_proc) return;

	// Save the current action and reset m_currentAction before we
    // emit a signal to mark the completion; otherwise we may be
    // resetting the action after a slot has already tried to set it
    // to something else to start a new action

    HgAction completedAction = m_currentAction;

    m_isRunning = false;
    m_currentAction = HgAction();

    //closeProcInput();
    m_proc->deleteLater();
    m_proc = 0;

    if (completedAction.action == ACT_NONE) {
        DEBUG << "HgRunner::finished: WARNING: completed action is ACT_NONE" << endl;
    } else {
        if (procExitCode == 0 && procExitStatus == QProcess::NormalExit) {
            DEBUG << "HgRunner::finished: Command completed successfully"
                  << endl;
//            DEBUG << "stdout is " << m_stdout << endl;
            emit commandCompleted(completedAction, m_stdout);
        } else {
            DEBUG << "HgRunner::finished: Command failed, exit code "
                  << procExitCode << ", exit status " << procExitStatus
                  << ", stderr follows" << endl;
            DEBUG << m_stderr << endl;
            emit commandFailed(completedAction, m_stderr);
        }
    }

    checkQueue();
}

void HgRunner::killCurrentActions()
{
    m_queue.clear();
    killCurrentCommand();
}

void HgRunner::killCurrentCommand()
{
    if (m_isRunning) {
        m_currentAction.action = ACT_NONE; // so that we don't bother to notify
        if (m_proc) m_proc->kill();
    }
}

void HgRunner::checkQueue()
{
    if (m_isRunning) {
        return;
    }
    if (m_queue.empty()) {
        hide();
        return;
    }
    HgAction toRun = m_queue.front();
    m_queue.pop_front();
    DEBUG << "checkQueue: have action: running " << toRun.action << endl;
    startCommand(toRun);
}

void HgRunner::startCommand(HgAction action)
{
    QString executable = action.executable;
    bool interactive = false;
    QStringList params = action.params;

    if (action.workingDir.isEmpty()) {
        // We require a working directory, never just operate in pwd
        emit commandFailed(action, "EasyMercurial: No working directory supplied, will not run Mercurial command without one");
        return;
    }

    QSettings settings;
    settings.beginGroup("General");

    if (executable == "") {
        // This is a Hg command
        executable = getHgBinaryName();
        if (executable == "") executable = "hg";

        QString ssh = getSshBinaryName();
        if (ssh != "") {
            params.push_front(QString("ui.ssh=\"%1\"").arg(ssh));
            params.push_front("--config");
        }

        if (action.mayBeInteractive()) {
            params.push_front("ui.interactive=true");
            params.push_front("--config");

            if (settings.value("useextension", true).toBool()) {
                QString extpath = getExtensionLocation();
                // Looks like this one must be without quotes, even though the SSH
                // one above only works on Windows if it has quotes (at least where
                // there is a space in the path).  Odd
                params.push_front(QString("extensions.easyhg=%1").arg(extpath));
                params.push_front("--config");
            }
            interactive = true;
        }            

        //!!! want an option to use the mercurial_keyring extension as well
    }

    m_isRunning = true;
    setRange(0, 0);
    if (!action.shouldBeFast()) show();
    m_stdout.clear();
    m_stderr.clear();
    m_realm = "";
    m_userName = "";

    m_proc = new QProcess;

    QProcessEnvironment env = QProcessEnvironment::systemEnvironment();

#ifdef Q_OS_WIN32
    // On Win32 we like to bundle Hg and other executables with EasyHg
    if (m_myDirPath != "") {
        env.insert("PATH", m_myDirPath + ";" + env.value("PATH"));
    }
#endif

#ifdef Q_OS_MAC
    if (settings.value("python32", false).toBool()) {
        env.insert("VERSIONER_PYTHON_PREFER_32_BIT", "1");
    }
#endif

    env.insert("LANG", "en_US.utf8");
    env.insert("LC_ALL", "en_US.utf8");
    env.insert("HGENCODING", "utf8");
    env.insert("HGPLAIN", "1");
    m_proc->setProcessEnvironment(env);

    connect(m_proc, SIGNAL(started()), this, SLOT(started()));
    connect(m_proc, SIGNAL(error(QProcess::ProcessError)),
            this, SLOT(error(QProcess::ProcessError)));
    connect(m_proc, SIGNAL(finished(int, QProcess::ExitStatus)),
            this, SLOT(finished(int, QProcess::ExitStatus)));
    connect(m_proc, SIGNAL(readyReadStandardOutput()),
            this, SLOT(dataReadyStdout()));
    connect(m_proc, SIGNAL(readyReadStandardError()),
            this, SLOT(dataReadyStderr()));

    m_proc->setWorkingDirectory(action.workingDir);

    if (interactive) {
        openTerminal();
        if (m_ptySlaveFilename != "") {
            DEBUG << "HgRunner: connecting to pseudoterminal" << endl;
            m_proc->setStandardInputFile(m_ptySlaveFilename);
//            m_proc->setStandardOutputFile(m_ptySlaveFilename);
//            m_proc->setStandardErrorFile(m_ptySlaveFilename);
        }
    }

    QString cmdline = executable;
    foreach (QString param, params) cmdline += " " + param;
    DEBUG << "HgRunner: starting: " << cmdline << " with cwd "
          << action.workingDir << endl;

    m_currentAction = action;

    // fill these out with what we actually ran
    m_currentAction.executable = executable;
    m_currentAction.params = params;

    DEBUG << "set current action to " << m_currentAction.action << endl;
    
    emit commandStarting(action);

    m_proc->start(executable, params);
}

void HgRunner::closeProcInput()
{
    DEBUG << "closeProcInput" << endl;

    if (m_proc) m_proc->closeWriteChannel();
}

void HgRunner::openTerminal()
{
#ifndef Q_OS_WIN32
    if (m_ptySlaveFilename != "") return; // already open
    DEBUG << "HgRunner::openTerminal: trying to open new pty" << endl;
    int master = posix_openpt(O_RDWR | O_NOCTTY);
    if (master < 0) {
        DEBUG << "openpt failed" << endl;
        perror("openpt failed");
        return;
    }
    struct termios t;
    if (tcgetattr(master, &t)) {
        DEBUG << "tcgetattr failed" << endl;
        perror("tcgetattr failed");
    }
    cfmakeraw(&t);
    if (tcsetattr(master, TCSANOW, &t)) {
        DEBUG << "tcsetattr failed" << endl;
        perror("tcsetattr failed");
    }
    if (grantpt(master)) {
        perror("grantpt failed");
    }
    if (unlockpt(master)) {
        perror("unlockpt failed");
    }
    char *slave = ptsname(master);
    if (!slave) {
        perror("ptsname failed");
        ::close(master);
        return;
    }
    m_ptyMasterFd = master;
    m_ptyFile = new QFile();
    connect(m_ptyFile, SIGNAL(readyRead()), this, SLOT(dataReadyPty()));
    if (!m_ptyFile->open(m_ptyMasterFd, QFile::ReadWrite)) {
        DEBUG << "HgRunner::openTerminal: Failed to open QFile on master fd" << endl;
    }
    m_ptySlaveFilename = slave;
    DEBUG << "HgRunner::openTerminal: succeeded, slave is "
          << m_ptySlaveFilename << endl;
#endif
}

void HgRunner::closeTerminal()
{
#ifndef Q_OS_WIN32
    if (m_ptySlaveFilename != "") {
        delete m_ptyFile;
        m_ptyFile = 0;
        ::close(m_ptyMasterFd);
        m_ptySlaveFilename = "";
    }
#endif
}