private void ParseFileName()
{
var match = FileNameRegex.Match(FileName);
if (!match.Success)
{
throw new FormatException($"Invalid FileSqlDatabaseMigration file name: must match the following regex '{FileNameRegex}'");
}
moduleName = match.Groups["module"].Captures.Count > 0
? match.Groups["module"].Captures[0].Value
: throw new FormatException($"Invalid FileSqlDatabaseMigration file name: missing module name in '{FileName}'");
isBaseline = match.Groups["baseline"].Captures.Count > 0;
isRepeatable = match.Groups["repeatable"].Captures.Count > 0;
version = match.Groups["version"].Captures.Count > 0
? DatabaseVersion.Parse(match.Groups["version"].Captures[0].Value) : null;
tags = match.Groups["tag"].Captures.Count > 0
? new[] { match.Groups["tag"].Captures.OfType <Capture>().Select(x => x.Value).ToArray() }
: new string[0][];
}
public DatabaseMigrationSpecifier(string moduleName, DatabaseVersion version)
{
ModuleName = moduleName;
Version = version;
}
private async Task <IReadOnlyCollection <IDatabaseMigration> > DoSelectMigrationsAsync(string moduleName, string[] tags,
DatabaseVersion targetVersion, List <DatabaseMigrationSpecifier> queuedMigrations)
{
IEnumerable <IDatabaseMigration> moduleMigrations = migrationRegistry.Migrations
.Where(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase))
.Where(x => x.Tags.All(tagGroup => tags.Any(tagGroup.Contains)));
if (targetVersion != null)
{
moduleMigrations = moduleMigrations.Where(x => x.Version.CompareTo(targetVersion) <= 0);
}
moduleMigrations = moduleMigrations
.OrderBy(x => x.Version)
.ToArray();
if (targetVersion != null)
{
if (!Equals(moduleMigrations.LastOrDefault()?.Version, targetVersion))
{
throw new DatabaseMigrationException($"Cannot select database migrations for module '{moduleName}': migration for required version {targetVersion} was not found");
}
}
else if (!moduleMigrations.Any())
{
throw new DatabaseMigrationException($"Cannot select database migrations for module '{moduleName}': no version for specified module were found");
}
List <IDatabaseMigration> result = new List <IDatabaseMigration>();
if (targetVersion == null && moduleMigrations.Last().IsRepeatable)
{
if (!queuedMigrations.Any(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase)))
{
history = history ?? await migrationProvider.GetMigrationHistoryAsync();
string lastMigrationChecksum = history
.Where(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase))
.OrderByDescending(x => x.TimeApplied)
.Select(x => x.Checksum).FirstOrDefault();
var migration = moduleMigrations.Last();
if (lastMigrationChecksum != migration.Checksum)
{
result.Add(migration);
}
}
}
else
{
var version = queuedMigrations
.Where(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase))
.OrderByDescending(x => x.Version)
.Select(x => x.Version)
.FirstOrDefault();
if (version == null)
{
history = history ?? await migrationProvider.GetMigrationHistoryAsync();
var lastMigration = history
.Where(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase))
.OrderByDescending(x => x.Version).FirstOrDefault();
version = lastMigration?.Version;
}
if (version == null)
{
var baseline = moduleMigrations.FirstOrDefault(x => x.IsBaseline);
if (baseline != null)
{
result.Add(baseline);
result.AddRange(moduleMigrations
.Where(x => !x.IsRepeatable && x.Version.CompareTo(baseline.Version) > 0));
}
else
{
result.AddRange(moduleMigrations.Where(x => !x.IsRepeatable));
}
result.AddRange(moduleMigrations.Where(x => x.IsRepeatable));
}
else
{
result.AddRange(moduleMigrations
.Where(x => !x.IsRepeatable && !x.IsBaseline && x.Version.CompareTo(version) > 0));
if (result.Count > 0)
{
result.AddRange(moduleMigrations.Where(x => x.IsRepeatable));
}
}
}
foreach (var migration in result)
{
queuedMigrations.Add(new DatabaseMigrationSpecifier(migration.ModuleName, migration.Version));
}
await AddRequiredDependenciesAsync(result, queuedMigrations, tags);
return(result);
}
public DatabaseMigrationSearchSpecifier(string moduleNameWildcard, DatabaseVersion version)
{
ModuleNameWildcard = moduleNameWildcard;
Version = version;
}
private async Task <IReadOnlyCollection <IDatabaseMigration> > DoSelectMigrationsAsync(string moduleName, string[] tags,
DatabaseVersion targetVersion, List <DatabaseMigrationSpecifier> queuedMigrations)
{
IEnumerable <IDatabaseMigration> moduleMigrations = migrationRegistry.Migrations
.Where(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase))
.Where(x => x.Tags.All(tagGroup => tags.Any(tagGroup.Contains)));
if (targetVersion != null)
{
moduleMigrations = moduleMigrations.Where(x => x.Version.CompareTo(targetVersion) <= 0);
}
moduleMigrations = moduleMigrations
.OrderBy(x => x.Version)
.ToArray();
if (targetVersion != null)
{
if (moduleMigrations.Any() && moduleMigrations.Last().IsRepeatable)
{
throw new DatabaseMigrationException($"Cannot select database migrations for module '{moduleName}' version {targetVersion} because it is a repeatable migration module, which means it is versioned only by checksums");
}
}
else if (!moduleMigrations.Any())
{
// TODO maybe return without errors if there are migrations for this module with different tags?
throw new DatabaseMigrationException($"Cannot select database migrations for module '{moduleName}': no migrations for specified module were found");
}
List <IDatabaseMigration> result = new List <IDatabaseMigration>();
if (moduleMigrations.Any() && moduleMigrations.Last().IsRepeatable) // repeatable-migration module
{
if (!queuedMigrations.Any(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase)))
{
history = history ?? await migrationProvider.GetMigrationHistoryAsync();
string lastMigrationChecksum = history
.Where(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase))
.OrderByDescending(x => x.TimeApplied)
.Select(x => x.Checksum).FirstOrDefault();
var migration = moduleMigrations.Last();
if (lastMigrationChecksum != migration.Checksum)
{
result.Add(migration);
}
}
}
else
{
var version = queuedMigrations
.Where(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase))
.OrderByDescending(x => x.Version)
.Select(x => x.Version)
.FirstOrDefault();
if (version == null)
{
history = history ?? await migrationProvider.GetMigrationHistoryAsync();
var lastMigration = history
.Where(x => string.Equals(x.ModuleName, moduleName, StringComparison.InvariantCultureIgnoreCase))
.OrderByDescending(x => x.Version).FirstOrDefault();
version = lastMigration?.Version;
}
if (version == null)
{
var baseline = moduleMigrations.FirstOrDefault(x => x.IsBaseline);
if (baseline != null)
{
result.Add(baseline);
result.AddRange(moduleMigrations
.Where(x => x.Version.CompareTo(baseline.Version) > 0));
}
else
{
result.AddRange(moduleMigrations);
}
}
else
{
result.AddRange(moduleMigrations
.Where(x => !x.IsBaseline && x.Version.CompareTo(version) > 0));
}
if (targetVersion != null)
{
if ((version == null || version.CompareTo(targetVersion) < 0) &&
(!result.Any() || !Equals(result.LastOrDefault()?.Version, targetVersion)))
{
throw new DatabaseMigrationException($"Cannot select database migrations for module '{moduleName}': migration for required version {targetVersion} from {version?.ToString() ?? "nothing"} was not found");
}
}
else
{
var maxVersion = moduleMigrations.Select(x => x.Version).Max();
if ((!result.Any() && (version == null || version.CompareTo(maxVersion) < 0)) ||
(result.Any() && !result.Last().Version.Equals(maxVersion)))
{
throw new DatabaseMigrationException($"Cannot select database migrations for module '{moduleName}': migration path to required version 'latest' ({maxVersion}) from {version?.ToString() ?? "nothing"} was not found");
}
}
}
foreach (var migration in result)
{
queuedMigrations.Add(new DatabaseMigrationSpecifier(migration.ModuleName, migration.Version));
}
await AddRequiredDependenciesAsync(result, queuedMigrations, tags);
return(result);
}
