annotate plugin/PluginScan.cpp @ 1752:6d09d68165a4 by-id

Further review of ById: make IDs only available when adding a model to the ById store, not by querying the item directly. This means any id encountered in the wild must have been added to the store at some point (even if later released), which simplifies reasoning about lifecycles

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

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, 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 "PluginScan.h"

#include "base/Debug.h"
#include "base/Preferences.h"
#include "base/HelperExecPath.h"

#include <sstream>

#include <QMutex>
#include <QCoreApplication>

using std::string;

class PluginScan::Logger
#ifdef HAVE_PLUGIN_CHECKER_HELPER
    : public PluginCandidates::LogCallback
#endif
{
protected:
    void log(std::string message) 
#ifdef HAVE_PLUGIN_CHECKER_HELPER
        override
#endif
    {
        SVDEBUG << "PluginScan: " << message << endl;
    }
};

PluginScan *PluginScan::getInstance()
{
    static QMutex mutex;
    static PluginScan *m_instance = nullptr;
    mutex.lock();
    if (!m_instance) m_instance = new PluginScan();
    mutex.unlock();
    return m_instance;
}

PluginScan::PluginScan() : m_succeeded(false), m_logger(new Logger) {
}

PluginScan::~PluginScan() {
    QMutexLocker locker(&m_mutex);
    clear();
    delete m_logger;
    SVDEBUG << "PluginScan::~PluginScan completed" << endl;
}

void
PluginScan::scan()
{
#ifdef HAVE_PLUGIN_CHECKER_HELPER

    QMutexLocker locker(&m_mutex);

    bool inProcess = Preferences::getInstance()->getRunPluginsInProcess();

    HelperExecPath hep(inProcess ?
                       HelperExecPath::NativeArchitectureOnly :
                       HelperExecPath::AllInstalled);

    QString helperName("vamp-plugin-load-checker");
    auto helpers = hep.getHelperExecutables(helperName);

    clear();

    for (auto p: helpers) {
        SVDEBUG << "NOTE: PluginScan: Found helper: " << p.executable << endl;
    }
    
    if (helpers.empty()) {
        SVDEBUG << "NOTE: No plugin checker helpers found in installation;"
             << " found none of the following:" << endl;
        for (auto d: hep.getHelperCandidatePaths(helperName)) {
            SVDEBUG << "NOTE: " << d << endl;
        }
    }

    for (auto p: helpers) {
        try {
            KnownPluginCandidates *kp = new KnownPluginCandidates
                (p.executable.toStdString(), m_logger);
            if (m_kp.find(p.tag) != m_kp.end()) {
                SVDEBUG << "WARNING: PluginScan::scan: Duplicate tag " << p.tag
                     << " for helpers" << endl;
                continue;
            }
            m_kp[p.tag] = kp;
            m_succeeded = true;
        } catch (const std::exception &e) {
            SVDEBUG << "ERROR: PluginScan::scan: " << e.what()
                 << " (with helper path = " << p.executable << ")" << endl;
        }
    }

    SVDEBUG << "PluginScan::scan complete" << endl;
#endif
}

bool
PluginScan::scanSucceeded() const
{
    QMutexLocker locker(&m_mutex);
    return m_succeeded;
}

void
PluginScan::clear()
{
    for (auto &p: m_kp) {
        delete p.second;
    }
    m_kp.clear();
    m_succeeded = false;
}

QList<PluginScan::Candidate>
PluginScan::getCandidateLibrariesFor(PluginType
#ifdef HAVE_PLUGIN_CHECKER_HELPER
                                     type
#endif
    ) const
{
#ifdef HAVE_PLUGIN_CHECKER_HELPER
    
    QMutexLocker locker(&m_mutex);

    KnownPlugins::PluginType kpt;
    switch (type) {
    case VampPlugin: kpt = KnownPlugins::VampPlugin; break;
    case LADSPAPlugin: kpt = KnownPlugins::LADSPAPlugin; break;
    case DSSIPlugin: kpt = KnownPlugins::DSSIPlugin; break;
    default: throw std::logic_error("Inconsistency in plugin type enums");
    }
    
    QList<Candidate> candidates;

    for (auto rec: m_kp) {

        KnownPluginCandidates *kp = rec.second;
        
        auto c = kp->getCandidateLibrariesFor(kpt);

        SVDEBUG << "PluginScan: helper \"" << kp->getHelperExecutableName()
                << "\" likes " << c.size() << " libraries of type "
                << kp->getTagFor(kpt) << endl;

        for (auto s: c) {
            candidates.push_back({ s.c_str(), rec.first });
        }

        if (type != VampPlugin) {
            // We are only interested in querying multiple helpers
            // when dealing with Vamp plugins, for which we can use
            // external servers and so in some cases can support
            // additional architectures. Other plugin formats are
            // loaded directly and so must match the host, which is
            // what the first helper is supposed to handle -- so
            // break after the first one if not querying Vamp
            break;
        }
    }

    return candidates;
    
#else
    return {};
#endif
}

#ifdef HAVE_PLUGIN_CHECKER_HELPER
QString
PluginScan::formatFailureReport(QString tag,
                                std::vector<PluginCandidates::FailureRec> failures) const
{
    int n = int(failures.size());
    int i = 0;

    std::ostringstream os;
    
    os << "<ul>";
    for (auto f: failures) {
        os << "<li><code>" + f.library + "</code>";

        SVDEBUG << "PluginScan::formatFailureReport: tag is \"" << tag
                << "\", failure code is " << int(f.code) << ", message is \""
                << f.message << "\"" << endl;
        
        QString userMessage = QString::fromStdString(f.message);

        switch (f.code) {

        case PluginCheckCode::FAIL_LIBRARY_NOT_FOUND:
            userMessage = QObject::tr("Library file could not be opened");
            break;

        case PluginCheckCode::FAIL_WRONG_ARCHITECTURE:
            if (tag == "64" || (sizeof(void *) == 8 && tag == "")) {
                userMessage = QObject::tr
                    ("Library has wrong architecture - possibly a 32-bit plugin installed in a 64-bit plugin folder");
            } else if (tag == "32" || (sizeof(void *) == 4 && tag == "")) {
                userMessage = QObject::tr
                    ("Library has wrong architecture - possibly a 64-bit plugin installed in a 32-bit plugin folder");
            }
            break;

        case PluginCheckCode::FAIL_DEPENDENCY_MISSING:
            userMessage = QObject::tr
                ("Library depends on another library that cannot be found: %1")
                .arg(userMessage);
            break;

        case PluginCheckCode::FAIL_NOT_LOADABLE:
            userMessage = QObject::tr
                ("Library cannot be loaded: %1").arg(userMessage);
            break;

        case PluginCheckCode::FAIL_FORBIDDEN:
            userMessage = QObject::tr
                ("Permission to load library was refused");
            break;

        case PluginCheckCode::FAIL_DESCRIPTOR_MISSING:
            userMessage = QObject::tr
                ("Not a valid plugin library (no descriptor found)");
            break;

        case PluginCheckCode::FAIL_NO_PLUGINS:
            userMessage = QObject::tr
                ("Library contains no plugins");
            break;

        case PluginCheckCode::FAIL_OTHER:
            if (userMessage == "") {
                userMessage = QObject::tr
                    ("Unknown error");
            }
            break;

        case PluginCheckCode::SUCCESS:
            // success shouldn't happen here!
            break;
        }
        
        os << "<br><i>" + userMessage.toStdString() + "</i>";
        os << "</li>";

        if (n > 10) {
            if (++i == 5) {
                os << "<li>";
                os << QObject::tr("... and %n further failure(s)",
                                  "", n - i)
                    .toStdString();
                os << "</li>";
                break;
            }
        }
    }
    os << "</ul>";

    return QString::fromStdString(os.str());
}
#endif

QString
PluginScan::getStartupFailureReport() const
{
#ifdef HAVE_PLUGIN_CHECKER_HELPER
    
    QMutexLocker locker(&m_mutex);

    if (!m_succeeded) {
        return QObject::tr("<b>Failed to scan for plugins</b>"
                           "<p>Failed to scan for plugins at startup. Possibly "
                           "the plugin checker program was not correctly "
                           "installed alongside %1?</p>")
            .arg(QCoreApplication::applicationName());
    }
    if (m_kp.empty()) {
        return QObject::tr("<b>Did not scan for plugins</b>"
                           "<p>Apparently no scan for plugins was attempted "
                           "(internal error?)</p>");
    }

    QString report;
    for (auto kp: m_kp) {
        auto failures = kp.second->getFailures();
        if (!failures.empty()) {
            report += formatFailureReport(kp.first, failures);
        }
    }
    if (report == "") {
        return report;
    }

    return QObject::tr("<p>Failed to load one or more plugin libraries:</p>")
        + report
        + QObject::tr("<p>These plugins may be incompatible with the system, "
                      "and will be ignored during this run of %1.</p>")
        .arg(QCoreApplication::applicationName());

#else
    return "";
#endif
}