Testing: add test to check the shipped config-files for correctness.

src/modules/CMakeLists.txt

@@ -1,5 +1,10 @@
 include( CMakeColors )
 
+if( BUILD_TESTING )
+    add_executable( test_conf test_conf.cpp )
+    target_link_libraries( test_conf ${YAMLCPP_LIBRARY} )
+endif()
+
 file( GLOB SUBDIRECTORIES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "*" )
 string( REPLACE " " ";" SKIP_LIST "${SKIP_MODULES}" )
 foreach( SUBDIRECTORY ${SUBDIRECTORIES} )

src/modules/test_conf.cpp

@@ -0,0 +1,66 @@
+/* === This file is part of Calamares - <http://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/>.
+ */
+
+/**
+ * This is a test-application that just checks the YAML config-file
+ * shipped with each module for correctness -- well, for parseability.
+ */
+
+#include <iostream>
+#include <yaml-cpp/yaml.h>
+
+using std::cerr;
+
+int main(int argc, char** argv)
+{
+    if (argc != 2)
+    {
+        cerr << "Usage: test_conf <file.conf>\n";
+        return 1;
+    }
+
+    try
+    {
+        YAML::Node doc = YAML::LoadFile( argv[1] );
+
+        if ( doc.IsNull() )
+        {
+            // Special case: empty config files are valid,
+            // but aren't a map. For the example configs,
+            // this is still an error.
+            cerr << "WARNING:" << argv[1] << '\n';
+            cerr << "WARNING: empty YAML\n";
+            return 1;
+        }
+
+        if ( !doc.IsMap() )
+        {
+            cerr << "WARNING:" << argv[1] << '\n';
+            cerr << "WARNING: not-a-YAML-map\n";
+            return 1;
+        }
+    }
+    catch ( YAML::Exception& e )
+    {
+        cerr << "WARNING:" << argv[1]  << '\n';
+        cerr << "WARNING: YAML parser error " << e.what() << '\n';
+        return 1;
+    }
+
+    return 0;
+}