AutoreconfStep: Employ task tree for running

Task-number: QTCREATORBUG-29168
Change-Id: I3f12b856ca877a73c5351cbc9f074e2394673913
Reviewed-by: hjk <hjk@qt.io>

src/plugins/autotoolsprojectmanager/autoreconfstep.cpp

@@ -13,6 +13,7 @@
 #include <projectexplorer/projectexplorerconstants.h>
 
 #include <utils/aspects.h>
+#include <utils/process.h>
 
 using namespace ProjectExplorer;
 using namespace Utils;
@@ -61,6 +62,9 @@ public:
 
     void doRun() override
     {
+        using namespace Tasking;
+
+        const auto onSetup = [this] {
             // Check whether we need to run autoreconf
             const FilePath configure = project()->projectDirectory() / "configure";
             if (!configure.exists())
@@ -69,12 +73,13 @@ public:
             if (!m_runAutoreconf) {
                 emit addOutput(Tr::tr("Configuration unchanged, skipping autoreconf step."),
                                OutputFormat::NormalMessage);
-            emit finished(true);
-            return;
+                return SetupResult::StopWithDone;
             }
+            return SetupResult::Continue;
+        };
+        const auto onDone = [this] { m_runAutoreconf = false; };
 
-        m_runAutoreconf = false;
-        AbstractProcessStep::doRun();
+        runTaskTree({onGroupSetup(onSetup), onGroupDone(onDone), defaultProcessTask()});
     }
 
 private: