Fix shortcuts.vdf must be present before adding one to steam

- Only create backup in case a file exists.
- Also, only create backup if no backup exists.
  If glossi nukes the vdf file, more than 1 add operation would also nuke the last backup
- Add log output to shortcut backup

Fixes: #163

GlosSIConfig/Resource.rc

@@ -51,8 +51,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 0,0,7,1
- PRODUCTVERSION 0,0,7,1
+ FILEVERSION 0,0,7,102000153200
+ PRODUCTVERSION 0,0,7,102000153200
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -69,12 +69,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "Peter Repukat - FlatspotSoftware"
             VALUE "FileDescription", "GlosSI - Config"
-            VALUE "FileVersion", "0.0.7.1"
+            VALUE "FileVersion", "0.0.7.1-2-gd15320b"
             VALUE "InternalName", "GlosSIConfig"
             VALUE "LegalCopyright", "Copyright (C) 2021 Peter Repukat - FlatspotSoftware"
             VALUE "OriginalFilename", "GlosSIConfig.exe"
             VALUE "ProductName", "GlosSI"
-            VALUE "ProductVersion", "0.0.7.1"
+            VALUE "ProductVersion", "0.0.7.1-2-gd15320b"
         END
     END
     BLOCK "VarFileInfo"
@@ -108,3 +108,19 @@ IDI_ICON1               ICON                    "..\GloSC_Icon.ico"
 /////////////////////////////////////////////////////////////////////////////
 #endif    // not APSTUDIO_INVOKED
 
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GlosSIConfig/VDFParser.h

@@ -24,6 +24,8 @@ limitations under the License.
 #include <string>
 #include <vector>
 
+#include <QDebug>
+
 namespace VDFParser {
 namespace crc {
 template <typename CONT>
@@ -489,7 +491,14 @@ class Parser {
 
     static inline bool writeShortcuts(std::filesystem::path path, const VDFFile& vdffile)
     {
-        const auto copied = std::filesystem::copy_file(path, path.wstring() + L".bak", std::filesystem::copy_options::update_existing);
+        const auto backupFileName = path.wstring() + L".bak";
+        if (std::filesystem::exists(path) && !std::filesystem::exists(backupFileName)) {
+            qDebug() << "No shortcuts backup detected... Creating now...";
+            const auto copied = std::filesystem::copy_file(path, backupFileName, std::filesystem::copy_options::update_existing);
+            if (!copied) {
+                qDebug() << "failed to copy shortcuts.vdf to backup!";
+            }
+        }
 
         ofile.open(path.wstring(), std::ios::binary | std::ios::out);
         if (!ofile.is_open()) {