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package main
import (
"fmt"
"github.com/rubenv/sql-migrate"
)
func ApplyMigrations(dir migrate.MigrationDirection, dryrun bool, limit int) error {
env, err := GetEnvironment()
if err != nil {
return fmt.Errorf("Could not parse config: %s", err)
}
db, dialect, err := GetConnection(env)
if err != nil {
return err
}
source := migrate.FileMigrationSource{
Dir: env.Dir,
}
if dryrun {
migrations, _, err := migrate.PlanMigration(db, dialect, source, dir, limit)
if err != nil {
return fmt.Errorf("Cannot plan migration: %s", err)
}
for _, m := range migrations {
PrintMigration(m, dir)
}
} else {
n, err := migrate.ExecMax(db, dialect, source, dir, limit)
if err != nil {
return fmt.Errorf("Migration failed: %s", err)
}
if n == 1 {
ui.Output("Applied 1 migration")
} else {
ui.Output(fmt.Sprintf("Applied %d migrations", n))
}
}
return nil
}
func PrintMigration(m *migrate.PlannedMigration, dir migrate.MigrationDirection) {
if dir == migrate.Up {
ui.Output(fmt.Sprintf("==> Would apply migration %s (up)", m.Id))
for _, q := range m.Up {
ui.Output(q)
}
} else if dir == migrate.Down {
ui.Output(fmt.Sprintf("==> Would apply migration %s (down)", m.Id))
for _, q := range m.Down {
ui.Output(q)
}
} else {
panic("Not reached")
}
}
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