/// <summary>
/// Create an instance of the migrator object after validation are completed
/// </summary>
/// <param name="options"></param>
internal Migrator(Options options)
{
output = options.Output;
inputSchema = options.MigrationsTableSchema;
options.AssertValid();
isPreview = options.IsPreview;
useGlobalTransaction = options.UseGlobalTransaction || isPreview; // always run preview in a global transaction so previous migrations are seen
force = options.Force;
string dir = options.GetFolder();
Log("Minimig Migrator");
Log($" Directory: {dir}");
Log($" Provider: {options.Provider}");
db = new ConnectionContext(options);
Migrations = GetAllMigrations(dir, db.CommandSplitter);
Log($" Database: {db.Database}");
db.Open();
Log($" Transaction Mode: {(useGlobalTransaction ? "Global" : "Individual")}");
if (!ValidateMigrationsSchemaIsAvailable())
{
return;
}
EnsureMigrationsTableExists();
alreadyRan = tableExists ? db.GetAlreadyRan() : new AlreadyRan(Enumerable.Empty <MigrationRow>());
Log($" Prior Migrations: {alreadyRan.Count}");
if (alreadyRan.Count > 0)
{
var last = alreadyRan.Last;
Log($" Last Migration: \"{last.Filename}\" on {last.ExecutionDate:u}");
}
Log();
if (isPreview && !options.UseGlobalTransaction)
{
Log("Using global transaction mode because of preview mode");
Log();
}
}
/// <summary>
/// Classify migrations in order to determine action to take
/// </summary>
/// <param name="alreadyRan"></param>
/// <returns>An enum with the migration mode to execute</returns>
internal MigrateMode GetMigrateMode(AlreadyRan alreadyRan)
{
if (alreadyRan.ByFilename.TryGetValue(Filename, out MigrationRow row))
{
return(row.Hash == Hash ? MigrateMode.Skip : MigrateMode.HashMismatch);
}
if (alreadyRan.ByHash.TryGetValue(Hash, out _))
{
return(MigrateMode.Rename);
}
return(MigrateMode.Run);
}
Migrator(Options options)
{
_output = options.Output;
options.AssertValid();
_isPreview = options.IsPreview;
_useGlobalTransaction = options.UseGlobalTransaction || _isPreview; // always run preview in a global transaction so previous migrations are seen
_force = options.Force;
var dir = options.GetFolder();
Log("Minimig Migrator");
Log(" Directory: " + dir);
Log(" Provider: " + options.Provider);
_db = new ConnectionContext(options);
Migrations = GetAllMigrations(dir, _db.CommandSplitter).ToList();
Log(" Database: " + _db.Database);
_db.Open();
Log(" Transaction Mode: " + (_useGlobalTransaction ? "Global" : "Individual"));
EnsureMigrationsTableExists();
_alreadyRan = _tableExists ? _db.GetAlreadyRan() : new AlreadyRan(Enumerable.Empty <MigrationRow>());
Log(" Prior Migrations: " + _alreadyRan.Count);
if (_alreadyRan.Count > 0)
{
var last = _alreadyRan.Last;
Log($" Last Migration: \"{last.Filename}\" on {last.ExecutionDate:u}");
}
Log();
if (_isPreview && !options.UseGlobalTransaction)
{
Log("Using global transaction mode because of preview mode");
Log();
}
}