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|
package main
import (
"flag"
"strings"
"github.com/rubenv/sql-migrate"
)
type DownCommand struct {
}
func (c *DownCommand) Help() string {
helpText := `
Usage: sql-migrate down [options] ...
Undo a database migration.
Options:
-config=dbconfig.yml Configuration file to use.
-env="development" Environment.
-limit=1 Limit the number of migrations (0 = unlimited).
-dryrun Don't apply migrations, just print them.
`
return strings.TrimSpace(helpText)
}
func (c *DownCommand) Synopsis() string {
return "Undo a database migration"
}
func (c *DownCommand) Run(args []string) int {
var limit int
var dryrun bool
cmdFlags := flag.NewFlagSet("down", flag.ContinueOnError)
cmdFlags.Usage = func() { ui.Output(c.Help()) }
cmdFlags.IntVar(&limit, "limit", 1, "Max number of migrations to apply.")
cmdFlags.BoolVar(&dryrun, "dryrun", false, "Don't apply migrations, just print them.")
ConfigFlags(cmdFlags)
if err := cmdFlags.Parse(args); err != nil {
return 1
}
err := ApplyMigrations(migrate.Down, dryrun, limit)
if err != nil {
ui.Error(err.Error())
return 1
}
return 0
}
|
