vendor dependencies with dep

vendor/github.com/go-pg/migrations/db.go

@@ -0,0 +1,79 @@
+package migrations
+
+import (
+	"io"
+	"strings"
+
+	"github.com/go-pg/pg"
+	"github.com/go-pg/pg/orm"
+	"github.com/go-pg/pg/types"
+)
+
+var tableName = "gopg_migrations"
+
+func SetTableName(name string) {
+	tableName = name
+}
+
+type DB interface {
+	Exec(query interface{}, params ...interface{}) (orm.Result, error)
+	ExecOne(query interface{}, params ...interface{}) (orm.Result, error)
+	Query(model, query interface{}, params ...interface{}) (orm.Result, error)
+	QueryOne(model, query interface{}, params ...interface{}) (orm.Result, error)
+
+	Model(model ...interface{}) *orm.Query
+	Select(model interface{}) error
+	Insert(model ...interface{}) error
+	Update(model ...interface{}) error
+	Delete(model interface{}) error
+	CreateTable(model interface{}, opt *orm.CreateTableOptions) error
+	DropTable(model interface{}, opt *orm.DropTableOptions) error
+
+	CopyFrom(r io.Reader, query interface{}, params ...interface{}) (orm.Result, error)
+	CopyTo(w io.Writer, query interface{}, params ...interface{}) (orm.Result, error)
+
+	FormatQuery(dst []byte, query string, params ...interface{}) []byte
+}
+
+func getTableName() types.ValueAppender {
+	return pg.Q(tableName)
+}
+
+func Version(db DB) (int64, error) {
+	var version int64
+	_, err := db.QueryOne(pg.Scan(&version), `
+		SELECT version FROM ? ORDER BY id DESC LIMIT 1
+	`, getTableName())
+	if err != nil {
+		if err == pg.ErrNoRows {
+			return 0, nil
+		}
+		return 0, err
+	}
+	return version, nil
+}
+
+func SetVersion(db DB, version int64) error {
+	_, err := db.Exec(`
+		INSERT INTO ? (version, created_at) VALUES (?, now())
+	`, getTableName(), version)
+	return err
+}
+
+func createTables(db DB) error {
+	if ind := strings.IndexByte(tableName, '.'); ind >= 0 {
+		_, err := db.Exec(`CREATE SCHEMA IF NOT EXISTS ?`, pg.Q(tableName[:ind]))
+		if err != nil {
+			return err
+		}
+	}
+
+	_, err := db.Exec(`
+		CREATE TABLE IF NOT EXISTS ? (
+			id serial,
+			version bigint,
+			created_at timestamptz
+		)
+	`, getTableName())
+	return err
+}