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driver.go
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driver.go
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package migration
import (
"database/sql"
"errors"
"io"
"io/ioutil"
"regexp"
"strings"
"github.com/concourse/atc/db/encryption"
"github.com/concourse/atc/db/migration/migrations"
"github.com/mattes/migrate/database"
)
//go:generate counterfeiter . Driver
type Driver interface {
Open(url string) (database.Driver, error)
Close() error
Lock() error
Unlock() error
Run(migration io.Reader) error
SetVersion(version int, dirty bool) error
Version() (version int, dirty bool, err error)
Drop() error
}
//go:generate counterfeiter . Migrations
type Migrations interface {
Run(name string) error
}
func NewDriver(d Driver, db *sql.DB, es encryption.Strategy) Driver {
return NewDriverForMigrations(d, migrations.NewMigrations(db, es))
}
func NewDriverForMigrations(d Driver, m Migrations) Driver {
return &driver{d, m}
}
type driver struct {
Driver
Migrations
}
func (self *driver) Run(reader io.Reader) error {
migr, err := ioutil.ReadAll(reader)
if err != nil {
return err
}
contents := string(migr)
if strings.HasPrefix(contents, "package") {
re := regexp.MustCompile("(Up|Down)_[0-9]*")
name := re.FindString(contents)
if name == "" {
return errors.New("No migration found. Must match (Up|Down)_[0-9]*")
}
return self.Migrations.Run(name)
} else {
return self.Driver.Run(strings.NewReader(contents))
}
}