RemoveFolderEx: Remove a folder recursively. Differs from WixUtilExte…

…nsion's RemoveFolderEx in proper handling of reparse points (symbolic links, mount volumes, etc.)

Reparse points are deleted before RemoveFiles action. On rollback, the reparse points are restored
Worksaround Windows Installer bugous handling of reparse points- such as deleting the target of symbolic link files, or keeping directory symbolic link if their target contains files

src/CaCommon/WixString.h

@@ -134,7 +134,7 @@ class CWixString
 		return pS;
 	}
 
-	HRESULT Copy(const CWixString &other)
+	HRESULT Copy(const CWixString& other)
 	{
 		HRESULT hr = S_OK;
 
@@ -208,7 +208,7 @@ class CWixString
 		ExitOnNull((dwStart < StrLen()), hr, E_INVALIDSTATE, "Substring start index is out of range");
 
 		szOld = Detach();
-		
+
 		hr = Copy(szOld + dwStart, dwLength);
 		ExitOnFailure(hr, "Failed to copy string");
 
@@ -259,7 +259,7 @@ class CWixString
 		LPWSTR szObfuscated = nullptr;
 		LPWSTR szMsiHiddenProperties = nullptr;
 		LPWSTR szHideMe = nullptr;
-		
+
 		Release();
 
 		hr = StrAllocString(&szStripped, szFormat, 0);
@@ -384,6 +384,26 @@ class CWixString
 		return hr;
 	}
 
+	// Remove characters from the left
+	void RemoveLeft(DWORD dwCount)
+	{
+		DWORD dwNewLen = 0;
+		DWORD i = 0;
+
+		if (dwCount >= StrLen())
+		{
+			Release();
+			return;
+		}
+
+		dwNewLen = StrLen() - dwCount;
+		for (i = 0; i < dwNewLen; ++i)
+		{
+			_pS[i] = _pS[i + dwCount];
+		}
+		_pS[i] = NULL;
+	}
+
 #pragma region Tokenize
 
 	HRESULT Tokenize(LPCWSTR delimiters, LPCWSTR* firstToken)

src/PanelSwCustomActions/CommonDeferred.cpp

@@ -13,6 +13,7 @@
 #include "XslTransform.h"
 #include "RestartLocalResources.h"
 #include "ConcatFiles.h"
+#include "ReparsePoint.h"
 
 // ReceiverToExecutorFunc implementation.
 HRESULT ReceiverToExecutor(LPCSTR szReceiver, CDeferredActionBase** ppExecutor)
@@ -90,6 +91,11 @@ HRESULT ReceiverToExecutor(LPCSTR szReceiver, CDeferredActionBase** ppExecutor)
 		WcaLog(LOGLEVEL::LOGMSG_VERBOSE, "Creating ConcatFiles handler");
 		(*ppExecutor) = new CConcatFiles();
 	}
+	else if (0 == ::strcmp(szReceiver, "CReparsePoint"))
+	{
+		WcaLog(LOGLEVEL::LOGMSG_VERBOSE, "Creating ReparsePoint handler");
+		(*ppExecutor) = new CReparsePoint();
+	}
 	else
 	{
 		hr = E_INVALIDARG;