func createOldMigrationFile(url, migrationsPath string) error {
version := file.Version(20060102150405)
filenamef := "%d_%s.%s.%s"
name := "old"
d, err := driver.New(url)
if err != nil {
return err
}
mfile := &file.MigrationFile{
Version: version,
UpFile: &file.File{
Path: migrationsPath,
FileName: fmt.Sprintf(filenamef, version, name, "up", d.FilenameExtension()),
Name: name,
Content: []byte(""),
Direction: direction.Up,
},
DownFile: &file.File{
Path: migrationsPath,
FileName: fmt.Sprintf(filenamef, version, name, "down", d.FilenameExtension()),
Name: name,
Content: []byte(""),
Direction: direction.Down,
},
}
err = ioutil.WriteFile(path.Join(mfile.UpFile.Path, mfile.UpFile.FileName), mfile.UpFile.Content, 0644)
return err
}
// Versions returns applied versions.
func Versions(url, migrationsPath string) (versions file.Versions, err error) {
d, err := driver.New(url)
if err != nil {
return file.Versions{}, err
}
return d.Versions()
}
// initDriverAndReadMigrationFilesAndGetVersionsAndGetVersion is a small helper
// function that is common to most of the migration funcs.
func initDriverAndReadMigrationFilesAndGetVersions(url, migrationsPath string) (driver.Driver, file.MigrationFiles, file.Versions, error) {
d, err := driver.New(url)
if err != nil {
return nil, nil, file.Versions{}, err
}
files, err := file.ReadMigrationFiles(migrationsPath, file.FilenameRegex(d.FilenameExtension()))
if err != nil {
d.Close() // TODO what happens with errors from this func?
return nil, nil, file.Versions{}, err
}
versions, err := d.Versions()
if err != nil {
d.Close() // TODO what happens with errors from this func?
return nil, nil, file.Versions{}, err
}
return d, files, versions, nil
}