view base/HelperExecPath.cpp @ 1833:21c792334c2e sensible-delimited-data-strings

Rewrite all the DelimitedDataString stuff so as to return vectors of individual cell strings rather than having the classes add the delimiters themselves. Rename accordingly to names based on StringExport. Take advantage of this in the CSV writer code so as to properly quote cells that contain delimiter characters.

/* -*- 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 file copyright 2006-2016 Chris Cannam and QMUL.
    
    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 "HelperExecPath.h"

#include <QCoreApplication>
#include <QFile>
#include <QDir>
#include <QFileInfo>

QStringList
HelperExecPath::getTags()
{
    if (sizeof(void *) == 8) {
        if (m_type == NativeArchitectureOnly) {
            return { "64", "" };
        } else {
            return { "64", "", "32" };
        }
    } else {
        return { "", "32" };
    }
}

static bool
isGood(QString path)
{
    return QFile(path).exists() && QFileInfo(path).isExecutable();
}

QList<HelperExecPath::HelperExec>
HelperExecPath::getHelperExecutables(QString basename)
{
    QStringList dummy;
    return search(basename, dummy);
}

QString
HelperExecPath::getHelperExecutable(QString basename)
{
    auto execs = getHelperExecutables(basename);
    if (execs.empty()) return "";
    else return execs[0].executable;
}

QStringList
HelperExecPath::getHelperDirPaths()
{
    // Helpers are expected to exist in one of the following, in order
    // from most strongly preferred to least:
    //
    // 1. (on Mac only) in <mydir>/../Resources
    //
    // 2. (on non-Windows non-Mac platforms only) in
    // <mydir>/../lib/application-name/
    //
    // 3. (on non-Mac platforms only) in <mydir>/helpers
    //
    // 4. in <mydir>

    QStringList dirs;
    QString appName = QCoreApplication::applicationName();
    QString myDir = QCoreApplication::applicationDirPath();
    QString binaryName = QFileInfo(QCoreApplication::arguments().at(0))
        .fileName();
        
#ifdef Q_OS_MAC
    dirs.push_back(myDir + "/../Resources");
#else
#ifndef Q_OS_WIN32
    if (binaryName != "") {
        dirs.push_back(myDir + "/../lib/" + binaryName);
    }
    dirs.push_back(myDir + "/../lib/" + appName);
#endif
    dirs.push_back(myDir + "/helpers");
#endif
    dirs.push_back(myDir);
    return dirs;
}

QStringList
HelperExecPath::getHelperCandidatePaths(QString basename)
{
    QStringList candidates;
    (void)search(basename, candidates);
    return candidates;
}

QList<HelperExecPath::HelperExec>
HelperExecPath::search(QString basename, QStringList &candidates)
{
    QString extension = "";
#ifdef _WIN32
    extension = ".exe";
#endif

    QList<HelperExec> executables;
    QStringList dirs = getHelperDirPaths();
    
    for (QString t: getTags()) {
        for (QString d: dirs) {
            QString path = d + QDir::separator() + basename;
            if (t != QString()) path += "-" + t;
            path += extension;
            candidates.push_back(path);
            if (isGood(path)) {
                executables.push_back({ path, t });
                break;
            }
        }
    }

    return executables;
}