Introduce tool for fuzzy testing.

Incremental builds are the likeliest source of problems, as well as the
one that is the hardest to reproduce. This new tool turns a given project
into a quasi-autotest by checking out random commits and doing incremental
builds on them. In case of a build error that is not reproducible with
a clean build, it aborts and reports the offending sequence of commits.
Any qbs project that comes in a git repository is supported.

Change-Id: I9f6f9172ce03140341ed25859092a8ed32d4a17d
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/tests/fuzzy-test/commandlineparser.cpp b/tests/fuzzy-test/commandlineparser.cpp
new file mode 100644
index 000000000..e279f8b40
--- /dev/null
+++ b/tests/fuzzy-test/commandlineparser.cpp
@@ -0,0 +1,77 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Build Suite.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+#include "commandlineparser.h"
+
+#include <QFileInfo>
+
+static QString profileOption() { return "--profile"; }
+static QString startCommitOption() { return "--start-commit"; }
+
+CommandLineParser::CommandLineParser()
+{
+}
+
+void CommandLineParser::parse(const QStringList &commandLine)
+{
+    m_profile.clear();
+    m_startCommit.clear();
+    m_commandLine = commandLine;
+    Q_ASSERT(!m_commandLine.isEmpty());
+    m_command = m_commandLine.takeFirst();
+    while (!m_commandLine.isEmpty()) {
+        const QString arg = m_commandLine.takeFirst();
+        if (arg == profileOption())
+            assignOptionArgument(arg, m_profile);
+        else if (arg == startCommitOption())
+            assignOptionArgument(arg, m_startCommit);
+        else
+            throw ParseException(QString::fromLocal8Bit("Unknown parameter '%1'").arg(arg));
+    }
+    if (m_profile.isEmpty())
+        throw ParseException("No profile given.");
+    if (m_startCommit.isEmpty())
+        throw ParseException("No start commit given.");
+}
+
+QString CommandLineParser::usageString() const
+{
+    return QString::fromLocal8Bit("%1 %2 <profile> %3 <start commit>")
+            .arg(QFileInfo(m_command).fileName(), profileOption(), startCommitOption());
+}
+
+void CommandLineParser::assignOptionArgument(const QString &option, QString &argument)
+{
+    if (m_commandLine.isEmpty())
+        throw ParseException(QString::fromLocal8Bit("Option '%1' needs an argument.").arg(option));
+    argument = m_commandLine.takeFirst();
+    if (argument.isEmpty()) {
+        throw ParseException(QString::fromLocal8Bit("Argument for option '%1' must not be empty.")
+                             .arg(option));
+    }
+}