[ci][makeyml] support case of no tests

.gitlab-ci/makepipelineconfig.py

@@ -37,6 +37,7 @@ def substituteAndWrite(mapping):
 
 
 commandIndentation = ' '*args['indentation']
+duneConfigCommand = 'dunecontrol --opts=$DUNE_OPTS_FILE --current all'
 with open(args['outfile'], 'w') as ymlFile:
 
     def makeScriptString(commands):
@@ -45,7 +46,7 @@ with open(args['outfile'], 'w') as ymlFile:
 
     # if no configuration is given, build and run all tests
     if not args['testconfig']:
-        buildCommand = ['dunecontrol --opts=$DUNE_OPTS_FILE --current all',
+        buildCommand = [duneConfigCommand,
                         'dunecontrol --opts=$DUNE_OPTS_FILE --current '
                         'make -k -j4 build_tests']
         testCommand = ['cd build-cmake', 'dune-ctest -j4 --output-on-failure']
@@ -58,24 +59,35 @@ with open(args['outfile'], 'w') as ymlFile:
             testNames = config.keys()
             targetNames = [tc['target'] for tc in config.values()]
 
-            # The MakeFile generated by cmake contains .NOTPARALLEL statement,
-            # as it only allows one call to `CMakeFiles/Makefile2` at a time.
-            # Parallelism is taken care of within that latter Makefile. Thus,
-            # we let the script create a small custom makeFile here on top of
-            # `Makefile2`, where we define a new target to be built in parallel
-            buildCommand = [
-                'rm -f TestMakefile',
-                'touch TestMakefile',
-                'echo "include CMakeFiles/Makefile2" >> TestMakefile',
-                'echo "" >> TestMakefile',
-                '|\n'
-                + commandIndentation
-                + '  "echo "build_selected_tests: {}" >> TestMakefile"'
-                .format(' '.join(targetNames)),
-                'make -j4 build_selected_tests']
-            testCommand = ['cd build-cmake',
-                           'dune-ctest -j4 --output-on-failure -R {}'
-                           .format(' '.join(testNames))]
+            if not targetNames:
+                buildCommand = [duneConfigCommand,
+                                'echo "No tests to be built."']
+            else:
+                # The MakeFile generated by cmake contains .NOTPARALLEL,
+                # as it only allows a single call to `CMakeFiles/Makefile2`.
+                # Parallelism is taken care of within that latter Makefile.
+                # We let the script create a small custom makeFile here on top
+                # of `Makefile2`, defining a new target to be built in parallel
+                buildCommand = [
+                    duneConfigCommand,
+                    'cd build-cmake',
+                    'rm -f TestMakefile && touch TestMakefile',
+                    'echo "include CMakeFiles/Makefile2" >> TestMakefile',
+                    'echo "" >> TestMakefile',
+                    '|\n'
+                    + commandIndentation
+                    + '  echo "build_selected_tests: {}" >> TestMakefile'
+                      .format(' '.join(targetNames)),
+                    'make -f TestMakefile -j4 build_selected_tests']
+
+            if not testNames:
+                testCommand = ['echo "No tests to be run, make empty report."',
+                               'cd build-cmake',
+                               'dune-ctest -R NOOP']
+            else:
+                testCommand = ['cd build-cmake',
+                               'dune-ctest -j4 --output-on-failure -R {}'
+                               .format(' '.join(testNames))]
 
     substituteAndWrite({'build_script': makeScriptString(buildCommand),
                         'test_script': makeScriptString(testCommand)})