CMake: Remove BuildDirManager

The BuildDirManager was used to switch between different
BuildDirReaders. Now that only the FileApiReader is left, that
infrastructure is no longer needed.

Change-Id: I2d339a3407bb633cff6a8f7502b7b09094f63fef
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildsystem.h

@@ -25,10 +25,17 @@
 
 #pragma once
 
-#include "builddirmanager.h"
+#include "builddirparameters.h"
+#include "cmakebuildtarget.h"
+#include "cmakeprojectnodes.h"
+#include "fileapireader.h"
+#include "utils/macroexpander.h"
 
 #include <projectexplorer/buildsystem.h>
 
+#include <utils/fileutils.h>
+#include <utils/temporarydirectory.h>
+
 namespace ProjectExplorer { class ExtraCompiler; }
 
 namespace CppTools {
@@ -81,7 +88,28 @@ public:
 
     CMakeBuildConfiguration *cmakeBuildConfiguration() const;
 
+    // Generic CMake helper functions:
+    static CMakeConfig parseCMakeCacheDotTxt(const Utils::FilePath &cacheFile,
+                                             QString *errorMessage);
+
 private:
+    // Actually ask for parsing:
+    enum ReparseParameters {
+        REPARSE_DEFAULT = 0,                    // Nothing special:-)
+        REPARSE_FORCE_CMAKE_RUN = (1 << 0),     // Force cmake to run
+        REPARSE_FORCE_CONFIGURATION = (1 << 1), // Force configuration arguments to cmake
+        REPARSE_CHECK_CONFIGURATION
+        = (1 << 2), // Check for on-disk config and QtC config diff // FIXME: Remove this!
+        REPARSE_SCAN = (1 << 3),   // Run filesystem scan
+        REPARSE_URGENT = (1 << 4), // Do not delay the parser run by 1s
+    };
+    QString reparseParametersString(int reparseFlags);
+    void setParametersAndRequestParse(const BuildDirParameters &parameters,
+                                      const int reparseParameters);
+
+    void writeConfigurationIntoBuildDirectory(const Utils::MacroExpander *expander);
+
+    // State handling:
     // Parser states:
     void handleParsingSuccess();
     void handleParsingError();
@@ -106,7 +134,12 @@ private:
 
     void wireUpConnections(const ProjectExplorer::Project *p);
 
-    BuildDirManager m_buildDirManager;
+    Utils::FilePath workDirectory(const BuildDirParameters &parameters);
+    void stopParsingAndClearState();
+    void becameDirty();
+
+    void updateReparseParameters(const int parameters);
+    int takeReparseParameters();
 
     ProjectExplorer::TreeScanner m_treeScanner;
     QHash<QString, bool> m_mimeBinaryCache;
@@ -121,6 +154,17 @@ private:
     CppTools::CppProjectUpdater *m_cppCodeModelUpdater = nullptr;
     QList<ProjectExplorer::ExtraCompiler *> m_extraCompilers;
     QList<CMakeBuildTarget> m_buildTargets;
+
+    bool checkConfiguration();
+    bool hasConfigChanged();
+
+    // Parsing state:
+    BuildDirParameters m_parameters;
+    int m_reparseParameters;
+    mutable std::unordered_map<Utils::FilePath, std::unique_ptr<Utils::TemporaryDirectory>>
+        m_buildDirToTempDir;
+    FileApiReader m_reader;
+    mutable bool m_isHandlingError = false;
 };
 
 } // namespace Internal