a-la-karte/src/platformimporter.cpp

// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: 2024 A-La-Karte Contributors

#include "platformimporter.h"

#include <QDir>
#include <QRegularExpression>
#include <QStandardPaths>

PlatformImporter::PlatformImporter(QObject *parent)
    : QObject(parent)
{
}

QString PlatformImporter::findExecutable(const QString &name) const
{
    return QStandardPaths::findExecutable(name);
}

bool PlatformImporter::directoryExists(const QString &path) const
{
    return QDir(expandPath(path)).exists();
}

QString PlatformImporter::expandPath(const QString &path) const
{
    QString result = path;

    // Expand ~ to home directory
    if (result.startsWith(QLatin1Char('~'))) {
        result.replace(0, 1, QDir::homePath());
    }

    // Expand environment variables
    static QRegularExpression envVarRegex(QStringLiteral("\\$\\{?([A-Za-z_][A-Za-z0-9_]*)\\}?"));
    QRegularExpressionMatchIterator it = envVarRegex.globalMatch(result);

    while (it.hasNext()) {
        QRegularExpressionMatch match = it.next();
        QString varName = match.captured(1);
        QString varValue = QString::fromLocal8Bit(qgetenv(varName.toLocal8Bit().constData()));
        result.replace(match.captured(0), varValue);
    }

    return result;
}