static int DetermineVersion(InputParameters parameters, Migrator m)
{
switch(parameters.GotoMode)
{
default:
case GotoMode.Specific:
return parameters.DesitinationVersion.GetValueOrDefault(0);
case GotoMode.Previous:
return Math.Max(m.Migrations.Count - 1, 0);
case GotoMode.Last:
return m.Migrations.Count;
}
}
public static void Main(string[] args)
{
var settings = new InputParameters();
var options = new OptionSet
{
{ "help|h", "Show Help", s => settings.ShowHelp = true },
{ "command=|c=", "Command, possible values can be 'list', 'goto', 'gen' or 'export'. List is the default.", s => settings.ParseCommand(s) },
{ "path=|p=", "Migrations path", s => settings.MigrationFolder = s },
{ "table=|t=", "Table to filter on when deriving", s => settings.Table = s },
{ "con=", "Name of the connection", s => settings.Connection = s },
{ "version=|v=|to=", "Destination version, must be a number or 'last'", s => settings.GotoVersion(s) },
{ "name=|n=", "Only taken into account when command is 'gen'. Name of the new migration", s => settings.Name = s },
};
try
{
options.Parse(args);
}
catch (Exception e)
{
Logger.WriteLine(ConsoleColor.Red, e.Message);
settings.ShowHelp = true;
}
if (settings.ShowHelp || !settings.IsValid)
{
options.WriteOptionDescriptions(Console.Out);
return;
}
try
{
DoManatee(settings);
}
catch (Exception e)
{
Logger.WriteLine(ConsoleColor.Red, "Command failed: {0}", e.Message);
#if DEBUG
Logger.WriteLine(e.StackTrace);
#endif
}
}
private static void DoManatee(InputParameters settings)
{
// Export
if(settings.Command == Command.Export)
{
Logger.WriteLine(ConsoleColor.Green, "Exporting migrations from connection {0}", settings.Connection);
var deriver = new MigrationExporter(settings.MigrationFolder, settings.Connection, settings.Table);
deriver.DoExport();
return;
}
// Generate
if (settings.Command == Command.Gen)
{
Logger.WriteLine(ConsoleColor.Green, "Generating new migration file");
var fileName = string.Format("{0}_{1}.json", DateTime.Now.ToString("yyyyMMdd_HHmm"), settings.Name);
var content = @"{
up: {
},
down: {
}
}";
var outputPath = Path.Combine(settings.MigrationFolder, fileName);
File.WriteAllText(outputPath, content, Encoding.UTF8);
Logger.WriteLine("Generated new file: {0}", fileName);
return;
}
var migrator = new Migrator(settings.MigrationFolder, settings.Connection);
// List
if(settings.Command == Command.List)
{
Logger.WriteLine(ConsoleColor.Green, "Listing migrations from Folder {0} and connection {1}", settings.MigrationFolder, settings.Connection);
Logger.WriteLine(" Current Version: {0}", migrator.CurrentVersion);
int counter = 0;
foreach(var migration in migrator.Migrations)
{
counter++;
bool isCurrent = migrator.CurrentVersion == counter;
var msg = string.Format(" {0}: {1}{2}", counter, migration.Key, isCurrent ? " (current)" : string.Empty);
if (isCurrent)
Logger.WriteLine(ConsoleColor.Green, msg);
else
Logger.WriteLine(" {0}: {1}", counter, migration.Key);
}
return;
}
// Execute
if(settings.Command == Command.Goto)
{
Logger.WriteLine(ConsoleColor.Green, "Executing migrations from Folder {0} and connection {1}", settings.MigrationFolder, settings.Connection);
var destinationVersion = DetermineVersion(settings, migrator);
destinationVersion = Math.Min(destinationVersion, migrator.Migrations.Count);
Logger.WriteLine(" Current Version: {0}", migrator.CurrentVersion);
Logger.WriteLine(" Going to Version: {0}", destinationVersion);
migrator.Migrate(destinationVersion);
Logger.WriteLine(ConsoleColor.Yellow, "Migrations successful");
}
}