CMakePM: Implement "Build Only the Application to Be Run"

The "Build Only the Application to Be Run" setting of "Build before
deploying" was missing from the CMake project manager.

Fixes: QTCREATORBUG-31416
Change-Id: I6caff1f2ec1c9a58c4a90bc949b2df34776482da
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp

@@ -2112,6 +2112,25 @@ void CMakeBuildConfiguration::addToEnvironment(Utils::Environment &env) const
         env.appendOrSetPath(ninja.isFile() ? ninja.parentDir() : ninja);
 }
 
+void CMakeBuildConfiguration::restrictNextBuild(const ProjectExplorer::RunConfiguration *rc)
+{
+    auto buildStep = qobject_cast<CMakeBuildStep *>(
+        findOrDefault(buildSteps()->steps(), [](const BuildStep *bs) {
+            return bs->id() == Constants::CMAKE_BUILD_STEP_ID;
+        }));
+    if (!buildStep)
+        return;
+
+    if (rc) {
+        m_unrestrictedBuildTargets = buildStep->buildTargets();
+        buildStep->setBuildTargets({rc->buildKey()});
+        return;
+    }
+
+    if (!m_unrestrictedBuildTargets.isEmpty())
+        buildStep->setBuildTargets(m_unrestrictedBuildTargets);
+}
+
 Environment CMakeBuildConfiguration::configureEnvironment() const
 {
     Environment env = configureEnv.environment();

src/plugins/cmakeprojectmanager/cmakebuildconfiguration.h

@@ -71,6 +71,8 @@ public:
 
     void addToEnvironment(Utils::Environment &env) const override;
 
+    void restrictNextBuild(const ProjectExplorer::RunConfiguration *rc) override;
+
     Utils::Environment configureEnvironment() const;
     Internal::CMakeBuildSystem *cmakeBuildSystem() const;
 
@@ -103,6 +105,7 @@ private:
     void filterConfigArgumentsFromAdditionalCMakeArguments();
 
     Internal::CMakeBuildSystem *m_buildSystem = nullptr;
+    QStringList m_unrestrictedBuildTargets;
 
     friend class Internal::CMakeBuildSettingsWidget;
     friend class Internal::CMakeBuildSystem;