Move MyCopyFile into class FileNames

src/DirManager.cpp

@@ -91,6 +91,7 @@
 #include "AudacityException.h"
 #include "BlockFile.h"
 #include "FileException.h"
+#include "FileNames.h"
 #include "blockfile/LegacyBlockFile.h"
 #include "blockfile/LegacyAliasBlockFile.h"
 #include "blockfile/SimpleBlockFile.h"
@@ -1161,34 +1162,6 @@ bool DirManager::ContainsBlockFile(const wxString &filepath) const
       BlockFilePtr{ it->second.lock() };
 }
 
-namespace {
-   bool MyCopyFile(const wxString& file1, const wxString& file2,
-                                 bool overwrite = true)
-   {
-#ifdef __WXMSW__
-
-      // workaround not needed
-      return wxCopyFile(file1, file2, overwrite);
-
-#else
-      // PRL:  Compensate for buggy wxCopyFile that returns false success,
-      // which was a cause of case 4 in comment 10 of
-      // http://bugzilla.audacityteam.org/show_bug.cgi?id=1759
-      // Destination file was created, but was empty
-      // Bug was introduced after wxWidgets 2.8.12 at commit
-      // 0597e7f977c87d107e24bf3e95ebfa3d60efc249 of wxWidgets repo
-
-      bool existed = wxFileExists(file2);
-      bool result = wxCopyFile(file1, file2, overwrite) &&
-         wxFile{ file1 }.Length() == wxFile{ file2 }.Length();
-      if (!result && !existed)
-         wxRemoveFile(file2);
-      return result;
-
-#endif
-   }
-}
-
 // Adds one to the reference count of the block file,
 // UNLESS it is "locked", then it makes a NEW copy of
 // the BlockFile.
@@ -1232,7 +1205,7 @@ BlockFilePtr DirManager::CopyBlockFile(const BlockFilePtr &b)
       //a summary file, so we should check before we copy.
       if(b->IsSummaryAvailable())
       {
-         if( !MyCopyFile(fn.GetFullPath(),
+         if( !FileNames::CopyFile(fn.GetFullPath(),
                   newFile.GetFullPath()) )
             // Disk space exhaustion, maybe
             throw FileException{
@@ -1384,7 +1357,7 @@ std::pair<bool, wxString> DirManager::CopyToNewProjectDirectory(BlockFile *f)
       bool summaryExisted = f->IsSummaryAvailable();
       auto oldPath = oldFileNameRef.GetFullPath();
       if (summaryExisted) {
-         auto success = MyCopyFile(oldPath, newPath);
+         auto success = FileNames::CopyFile(oldPath, newPath);
          if (!success)
             return { false, {} };
       }
@@ -1415,7 +1388,7 @@ std::pair<bool, wxString> DirManager::CopyToNewProjectDirectory(BlockFile *f)
          //if it doesn't, we can assume it was written to the NEW name, which is fine.
          if (oldFileName.FileExists())
          {
-            bool ok = MyCopyFile(oldPath, newPath);
+            bool ok = FileNames::CopyFile(oldPath, newPath);
             if (!ok)
                return { false, {} };
          }

src/FileNames.cpp

@@ -43,6 +43,32 @@ used throughout Audacity into this one place.
 
 static wxString gDataDir;
 
+bool FileNames::CopyFile(
+   const wxString& file1, const wxString& file2, bool overwrite)
+{
+#ifdef __WXMSW__
+
+   // workaround not needed
+   return wxCopyFile(file1, file2, overwrite);
+
+#else
+   // PRL:  Compensate for buggy wxCopyFile that returns false success,
+   // which was a cause of case 4 in comment 10 of
+   // http://bugzilla.audacityteam.org/show_bug.cgi?id=1759
+   // Destination file was created, but was empty
+   // Bug was introduced after wxWidgets 2.8.12 at commit
+   // 0597e7f977c87d107e24bf3e95ebfa3d60efc249 of wxWidgets repo
+
+   bool existed = wxFileExists(file2);
+   bool result = wxCopyFile(file1, file2, overwrite) &&
+      wxFile{ file1 }.Length() == wxFile{ file2 }.Length();
+   if (!result && !existed)
+      wxRemoveFile(file2);
+   return result;
+
+#endif
+}
+
 wxString FileNames::MkDir(const wxString &Str)
 {
    // Behaviour of wxFileName::DirExists() and wxFileName::MkDir() has

src/FileNames.h

@@ -23,6 +23,10 @@ class wxArrayString;
 class AUDACITY_DLL_API FileNames
 {
 public:
+   // This exists to compensate for bugs in wxCopyFile:
+   static bool CopyFile(
+      const wxString& file1, const wxString& file2, bool overwrite = true);
+
    static wxString MkDir(const wxString &Str);
    static wxString TempDir();