/// <summary>
/// Merge multiple .db files into a single .db file.
/// </summary>
/// <param name="fileSpec">The file specification for the .db files to merge.</param>
/// <param name="recurse">Recursively search for matching .db files in child directories?</param>
/// <param name="outFileName">The name of the new output file.</param>
public static void MergeFiles(string fileSpec, bool recurse, string outFileName)
{
File.Delete(outFileName);
string[] filesToMerge = DirectoryUtilities.FindFiles(fileSpec, recurse);
if (filesToMerge.Length > 1)
{
File.Copy(filesToMerge[0], outFileName, overwrite: true);
var destination = new SQLite();
destination.OpenDatabase(outFileName, readOnly: false);
try
{
foreach (var sourceFileName in filesToMerge.Where(file => file != filesToMerge[0]))
{
var source = new SQLite();
// If readOnly is true then .db-shm files are not removed on close. Bug in SqLite.
// http://sqlite.1065341.n5.nabble.com/journal-files-not-always-removed-td83700.html
source.OpenDatabase(sourceFileName, readOnly: false);
try
{
Merge(source, destination);
}
finally
{
source.CloseDatabase();
}
}
}
finally
{
destination.CloseDatabase();
}
}
else if (filesToMerge.Length == 1)
{
File.Copy(filesToMerge[0], outFileName, true);
}
}
