replace env variable injection with pervasive expando support

do not inject SOURCEDIR and BUILDDIR into the environment of
build steps and run configurations any more.
instead, all custom executable paths, argument lists and working
directories now support the %{sourceDir} and %{buildDir} macros.
this approach is more elegant and more scalable.

src/plugins/projectexplorer/processparameters.h

@@ -0,0 +1,109 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#ifndef PROCESSPARAMETERS_H
+#define PROCESSPARAMETERS_H
+
+#include "projectexplorer_export.h"
+
+#include <utils/environment.h>
+
+namespace Utils {
+class AbstractMacroExpander;
+};
+
+namespace ProjectExplorer {
+
+/*!
+  ProcessParameters aggregates all parameters needed to start a process.
+
+  It offers a set of functions which expand macros and environment variables
+  inside the raw parameters to obtain final values for starting a process
+  or for display purposes.
+*/
+
+class PROJECTEXPLORER_EXPORT ProcessParameters
+{
+public:
+    ProcessParameters();
+
+    /// setCommand() sets the executable to run
+    void setCommand(const QString &cmd);
+    QString command() const { return m_command; }
+
+    /// sets the command line arguments used by the process
+    void setArguments(const QString &arguments);
+    QString arguments() const { return m_arguments; }
+
+    /// sets the workingDirectory for the process for a buildConfiguration
+    /// should be called from init()
+    void setWorkingDirectory(const QString &workingDirectory);
+    QString workingDirectory() const { return m_workingDirectory; }
+
+    /// Set the Environment for running the command
+    /// should be called from init()
+    void setEnvironment(const Utils::Environment &env) { m_environment = env; }
+    Utils::Environment environment() const { return m_environment; }
+
+    /// Set the macro expander to use on the command, arguments and working dir.
+    /// Note that the caller retains ownership of the object.
+    void setMacroExpander(Utils::AbstractMacroExpander *mx) { m_macroExpander = mx; }
+    Utils::AbstractMacroExpander *macroExpander() const { return m_macroExpander; }
+
+    /// Get the fully expanded working directory:
+    QString effectiveWorkingDirectory() const;
+    /// Get the fully expanded command name to run:
+    QString effectiveCommand() const;
+    /// Get the fully expanded arguments to use:
+    QString effectiveArguments() const;
+
+    /// True if effectiveCommand() would return only a fallback
+    bool commandMissing() const;
+
+    QString prettyCommand() const;
+    QString prettyArguments() const;
+    QString summary(const QString &displayName) const;
+    QString summaryInWorkdir(const QString &displayName) const;
+
+private:
+    QString m_workingDirectory;
+    QString m_command;
+    QString m_arguments;
+    Utils::Environment m_environment;
+    Utils::AbstractMacroExpander *m_macroExpander;
+
+    mutable QString m_effectiveWorkingDirectory;
+    mutable QString m_effectiveCommand;
+    mutable QString m_effectiveArguments;
+    mutable bool m_commandMissing;
+};
+
+} // namespace ProjectExplorer
+
+#endif // PROCESSPARAMETERS_H