AutogenStep: Employ task tree for running

Task-number: QTCREATORBUG-29168
Change-Id: I5b0cb5832d91f4147b273475304a1bba1dd08700
Reviewed-by: hjk <hjk@qt.io>

src/plugins/autotoolsprojectmanager/autogenstep.cpp

@@ -14,6 +14,7 @@
 #include <projectexplorer/target.h>
 
 #include <utils/aspects.h>
+#include <utils/process.h>
 
 #include <QDateTime>
 
@@ -71,6 +72,9 @@ AutogenStep::AutogenStep(BuildStepList *bsl, Id id) : AbstractProcessStep(bsl, i
 
 void AutogenStep::doRun()
 {
+    using namespace Tasking;
+
+    const auto onSetup = [this] {
         // Check whether we need to run autogen.sh
         const FilePath projectDir = project()->projectDirectory();
         const FilePath configure = projectDir / "configure";
@@ -86,12 +90,13 @@ void AutogenStep::doRun()
         if (!m_runAutogen) {
             emit addOutput(Tr::tr("Configuration unchanged, skipping autogen step."),
                            OutputFormat::NormalMessage);
-        emit finished(true);
+            return SetupResult::StopWithDone;
-        return;
         }
+        return SetupResult::Continue;
+    };
+    const auto onDone = [this] { m_runAutogen = false; };
 
-    m_runAutogen = false;
+    runTaskTree({onGroupSetup(onSetup), onGroupDone(onDone), defaultProcessTask()});
-    AbstractProcessStep::doRun();
 }
 
 // AutogenStepFactory