[contextualprocess] Stub of a contextual-process job

This is meant to run one or more jobs based on specific global
configuration values; if could also be done by a Python
module with just some if's, but this one can be used with
just the config file and covers a bunch of use-cases.

src/modules/contextualprocess/CMakeLists.txt

@@ -0,0 +1,9 @@
+calamares_add_plugin( contextualprocess
+    TYPE job
+    EXPORT_MACRO PLUGINDLLEXPORT_PRO
+    SOURCES
+        ContextualProcessJob.cpp
+    LINK_PRIVATE_LIBRARIES
+        calamares
+    SHARED_LIB
+)

src/modules/contextualprocess/ContextualProcessJob.cpp

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+/* === This file is part of Calamares - <https://github.com/calamares> ===
+ *
+ *   Copyright 2017, Adriaan de Groot <groot@kde.org>
+ *
+ *   Calamares 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 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Calamares 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 Calamares. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ContextualProcessJob.h"
+
+#include <QProcess>
+#include <QDateTime>
+#include <QThread>
+
+#include "CalamaresVersion.h"
+#include "JobQueue.h"
+#include "GlobalStorage.h"
+
+#include "utils/Logger.h"
+
+ContextualProcessJob::ContextualProcessJob( QObject* parent )
+    : Calamares::CppJob( parent )
+{
+}
+
+
+ContextualProcessJob::~ContextualProcessJob()
+{
+}
+
+
+QString
+ContextualProcessJob::prettyName() const
+{
+    return tr( "Contextual Processes Job" );
+}
+
+
+Calamares::JobResult
+ContextualProcessJob::exec()
+{
+    QThread::sleep( 3 );
+
+    return Calamares::JobResult::ok();
+}
+
+
+void
+ContextualProcessJob::setConfigurationMap( const QVariantMap& configurationMap )
+{
+    m_configurationMap = configurationMap;
+}
+
+CALAMARES_PLUGIN_FACTORY_DEFINITION( ContextualProcessJobFactory, registerPlugin<ContextualProcessJob>(); )

src/modules/contextualprocess/ContextualProcessJob.h

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+/* === This file is part of Calamares - <https://github.com/calamares> ===
+ *
+ *   Copyright 2017, Adriaan de Groot <groot@kde.org>
+ *
+ *   Calamares 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 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Calamares 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 Calamares. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CONTEXTUALPROCESSJOB_H
+#define CONTEXTUALPROCESSJOB_H
+
+#include <QObject>
+#include <QVariantMap>
+
+#include <CppJob.h>
+
+#include <utils/PluginFactory.h>
+
+#include <PluginDllMacro.h>
+
+class PLUGINDLLEXPORT ContextualProcessJob : public Calamares::CppJob
+{
+    Q_OBJECT
+
+public:
+    explicit ContextualProcessJob( QObject* parent = nullptr );
+    virtual ~ContextualProcessJob() override;
+
+    QString prettyName() const override;
+
+    Calamares::JobResult exec() override;
+
+    void setConfigurationMap( const QVariantMap& configurationMap ) override;
+
+private:
+    QVariantMap m_configurationMap;
+};
+
+CALAMARES_PLUGIN_FACTORY_DECLARATION( ContextualProcessJobFactory )
+
+#endif // CONTEXTUALPROCESSJOB_H

src/modules/contextualprocess/contextualprocess.conf

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+# Configuration for the contextual process job.
+#
+# Contextual processes are based on **global** configuration values.
+# When a given global value (string) equals a given value, then
+# the associated command is executed.
+#
+# Configuration consists of keys for global variable names,
+# and the sub-keys are strings to compare to the variable's value.
+# If the variable has that particular value, the corresponding
+# value is executed as a shell command in the target environment.
+#
+# If a command starts with "-" (a single minus sign), then the
+# return value of the command following the - is ignored; otherwise,
+# a failing command will abort the installation. This is much like
+# make's use of - in a command.
+---
+firmwareType:
+    efi:    "-pkg remove efi-firmware"
+    bios:   "-pkg remove bios-firmware"

src/modules/contextualprocess/module.desc

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+---
+type:      "job"
+name:      "contextualprocess"
+interface: "qtplugin"
+load:      "libcalamares_job_contextualprocess.so"