QbsProjectManager: Execute rules when parsing a project.

This makes information about build artifacts available before the actual
build starts (as far as the rule implementations allow that), at the
cost of a higher initial project resolving time.

Task-number: QBS-901
Change-Id: I0a223db85001136d359a53d4edc7239350f01701
Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>
Reviewed-by: Jake Petroules <jake.petroules@theqtcompany.com>

src/plugins/qbsprojectmanager/qbsprojectparser.cpp

@@ -49,6 +49,7 @@ namespace Internal {
 
 QbsProjectParser::QbsProjectParser(QbsProject *project, QFutureInterface<bool> *fi) :
     m_qbsSetupProjectJob(0),
+    m_ruleExecutionJob(0),
     m_fi(fi),
     m_currentProgressBase(0)
 {
@@ -64,6 +65,12 @@ QbsProjectParser::~QbsProjectParser()
         m_qbsSetupProjectJob->deleteLater();
         m_qbsSetupProjectJob = 0;
     }
+    if (m_ruleExecutionJob) {
+        m_ruleExecutionJob->disconnect(this);
+        m_ruleExecutionJob->cancel();
+        m_ruleExecutionJob->deleteLater();
+        m_ruleExecutionJob = 0;
+    }
     m_fi = 0; // we do not own m_fi, do not delete
 }
 
@@ -110,7 +117,10 @@ void QbsProjectParser::parse(const QVariantMap &config, const Environment &env,
 void QbsProjectParser::cancel()
 {
     QTC_ASSERT(m_qbsSetupProjectJob, return);
-    m_qbsSetupProjectJob->cancel();
+    if (m_ruleExecutionJob)
+        m_ruleExecutionJob->cancel();
+    else
+        m_qbsSetupProjectJob->cancel();
 }
 
 qbs::Project QbsProjectParser::qbsProject() const
@@ -133,7 +143,33 @@ void QbsProjectParser::handleQbsParsingDone(bool success)
     // Do not report the operation as canceled here, as we might want to make overlapping
     // parses appear atomic to the user.
 
-    emit done(success);
+    if (!success)
+        emit done(false);
+    else
+        startRuleExecution();
+}
+
+void QbsProjectParser::startRuleExecution()
+{
+    qbs::BuildOptions options;
+    options.setExecuteRulesOnly(true);
+    m_ruleExecutionJob = m_project.buildAllProducts(
+                options, qbs::Project::ProductSelectionWithNonDefault, this);
+    connect(m_ruleExecutionJob, &qbs::AbstractJob::finished,
+            this, &QbsProjectParser::handleRuleExecutionDone);
+    connect(m_ruleExecutionJob, &qbs::AbstractJob::taskStarted,
+            this, &QbsProjectParser::handleQbsParsingTaskSetup);
+    connect(m_ruleExecutionJob, &qbs::AbstractJob::taskProgress,
+            this, &QbsProjectParser::handleQbsParsingProgress);
+}
+
+void QbsProjectParser::handleRuleExecutionDone()
+{
+    QTC_ASSERT(m_ruleExecutionJob, return);
+    // We always report success here, since execution of some very dynamic rules might fail due
+    // to artifacts not being present. No genuine errors will get lost, as they will re-appear
+    // on the next build attempt.
+    emit done(true);
 }
 
 void QbsProjectParser::handleQbsParsingProgress(int progress)

src/plugins/qbsprojectmanager/qbsprojectparser.h

@@ -66,8 +66,12 @@ private:
     QString resourcesBaseDirectory() const;
     QString libExecDirectory() const;
 
+    void startRuleExecution();
+    void handleRuleExecutionDone();
+
     QString m_projectFilePath;
     qbs::SetupProjectJob *m_qbsSetupProjectJob;
+    qbs::BuildJob *m_ruleExecutionJob;
     qbs::ErrorInfo m_error;
     qbs::Project m_project;