kde-workspace/kreadconfig/kreadconfig.cpp

/*  Read KConfig() entries - for use in shell scripts.

    Copyright (c) 2001 Red Hat, Inc.

    Programmed by Bernhard Rosenkraenzer <bero@redhat.com>

    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.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/*
 * If --type is specified as bool, the return value is 0 if the value
 * is set, 1 if it isn't set. There is no output.
 *
 * If --type is specified as num, the return value matches the value
 * of the key. There is no output.
 *
 * If --type is not set, the value of the key is simply printed to stdout.
 *
 * Usage examples:
 *	if kreadconfig --group KDE --key macStyle --type bool; then
 *		echo "We're using Mac-Style menus."
 *	else
 *		echo "We're using normal menus."
 *	fi
 *
 *	TRASH=`kreadconfig --group Paths --key Trash`
 *	if test -n "$TRASH"; then
 *		mv someFile "$TRASH"
 *	else
 *		rm someFile
 *	fi
 */
#include <kconfig.h>
#include <kconfiggroup.h>
#include <kglobal.h>
#include <kapplication.h>
#include <kcmdlineargs.h>
#include <klocale.h>
#include <kaboutdata.h>

#include <stdio.h>

int main(int argc, char **argv)
{
    KAboutData aboutData(
        "kreadconfig", 0, ki18n("KReadConfig"),
        "1.0.1",
        ki18n("Read KConfig entries - for use in shell scripts"),
        KAboutData::License_GPL,
        ki18n("(c) 2001 Red Hat, Inc.")
    );
    aboutData.addAuthor(ki18n("Bernhard Rosenkraenzer"), KLocalizedString(), "bero@redhat.com");
    KCmdLineArgs::init(argc, argv, &aboutData);

    KCmdLineOptions options;
    options.add("file <file>", ki18n("Use <file> instead of global config"));
    options.add("group <group>", ki18n("Group to look in. Use repeatedly for nested groups."), "KDE");
    options.add("key <key>", ki18n("Key to look for"));
    options.add("default <default>", ki18n("Default value"));
    options.add("type <type>", ki18n("Type of variable"));
    KCmdLineArgs::addCmdLineOptions(options);
    KCmdLineArgs *args=KCmdLineArgs::parsedArgs();

    QStringList groups = args->getOptionList("group");
    QString key = args->getOption("key");
    QString file = args->getOption("file");
    QString dflt = args->getOption("default");
    QString type = args->getOption("type").toLower();

    if (key.isNull()) {
        KCmdLineArgs::usage();
        return 1;
    }

    KComponentData inst(&aboutData);
    KGlobal::config();

    KConfig* konfig = nullptr;
    bool configMustDeleted = false;
    if (file.isEmpty()) {
        konfig = KGlobal::config().data();
    } else {
        konfig = new KConfig(file, KConfig::NoGlobals);
        configMustDeleted = true;
    }

    KConfigGroup cfgGroup = konfig->group("");
    foreach (const QString &grp, groups) {
        cfgGroup = cfgGroup.group(grp);
        if (type == QLatin1String("bool")) {
            dflt = dflt.toLower();
            bool def = (
                dflt == QLatin1String("true") || dflt == QLatin1String("on")
                || dflt == QLatin1String("yes") || dflt == QLatin1String("1")
            );
            bool retValue = !cfgGroup.readEntry(key, def);
            if (configMustDeleted) {
                delete konfig;
            }
            return retValue;
        } else if (type == QLatin1String("num") || type == QLatin1String("int")) {
            int retValue = cfgGroup.readEntry(key, dflt.toInt());
            if (configMustDeleted) {
                delete konfig;
            }
            return retValue;
        } else if (type == QLatin1String("path")) {
            const QByteArray path = cfgGroup.readPathEntry(key, dflt).toLocal8Bit();
            fprintf(stdout, "%s\n", path.constData());
            if (configMustDeleted) {
                delete konfig;
            }
            return 0;
        } else {
            /* Assume it's a string... */
            const QByteArray string = cfgGroup.readEntry(key, dflt).toLocal8Bit();
            fprintf(stdout, "%s\n", string.constData());
            if (configMustDeleted) {
                delete konfig;
            }
            return 0;
        }
    }

    // Questionably, success
    return 0;
}