57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
package migrate
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import (
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"github.com/drone/drone/Godeps/_workspace/src/github.com/BurntSushi/migration"
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)
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// GetVersion gets the migration version from the database,
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// creating the migration table if it does not already exist.
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func GetVersion(tx migration.LimitedTx) (int, error) {
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v, err := getVersion(tx)
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if err != nil {
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if err := createVersionTable(tx); err != nil {
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return 0, err
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}
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return getVersion(tx)
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}
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return v, nil
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}
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// SetVersion sets the migration version in the database,
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// creating the migration table if it does not already exist.
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func SetVersion(tx migration.LimitedTx, version int) error {
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if err := setVersion(tx, version); err != nil {
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if err := createVersionTable(tx); err != nil {
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return err
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}
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return setVersion(tx, version)
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}
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return nil
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}
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// setVersion updates the migration version in the database.
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func setVersion(tx migration.LimitedTx, version int) error {
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_, err := tx.Exec(rebind("UPDATE migration_version SET version = ?"), version)
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return err
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}
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// getVersion gets the migration version in the database.
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func getVersion(tx migration.LimitedTx) (int, error) {
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var version int
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row := tx.QueryRow("SELECT version FROM migration_version")
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if err := row.Scan(&version); err != nil {
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return 0, err
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}
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return version, nil
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}
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// createVersionTable creates the version table and inserts the
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// initial value (0) into the database.
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func createVersionTable(tx migration.LimitedTx) error {
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_, err := tx.Exec("CREATE TABLE migration_version ( version INTEGER )")
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if err != nil {
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return err
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}
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_, err = tx.Exec("INSERT INTO migration_version (version) VALUES (0)")
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return err
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}
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