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migration.go
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migration.go
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package repo
import (
"errors"
"io/ioutil"
"os"
"path"
"strconv"
"strings"
"github.com/OpenBazaar/openbazaar-go/repo/migrations"
)
type Migration interface {
Up(repoPath string, dbPassword string, testnet bool) error
Down(repoPath string, dbPassword string, testnet bool) error
}
var (
ErrUnknownSchema = errors.New("unable to migrate unknown schema")
Migrations = []Migration{
migrations.Migration000{},
migrations.Migration001{},
migrations.Migration002{},
migrations.Migration003{},
migrations.Migration004{},
migrations.Migration005{},
migrations.Migration006{},
migrations.Migration007{},
migrations.Migration008{},
migrations.Migration009{},
migrations.Migration010{},
migrations.Migration011{},
migrations.Migration012{},
migrations.Migration013{},
migrations.Migration014{},
migrations.Migration015{},
migrations.Migration016{},
migrations.Migration017{},
migrations.Migration018{},
migrations.Migration019{},
migrations.Migration020{},
migrations.Migration021{},
migrations.Migration022{},
migrations.Migration023{},
migrations.Migration024{},
migrations.Migration025{},
migrations.Migration026{},
}
)
// MigrateUp looks at the currently active migration version
// and will migrate all the way up (applying all up migrations).
func MigrateUp(repoPath, dbPassword string, testnet bool) error {
version, err := ioutil.ReadFile(path.Join(repoPath, "repover"))
if err != nil && !os.IsNotExist(err) {
return err
} else if err != nil && os.IsNotExist(err) {
log.Noticef("missing repo version file, migrating from 0")
version = []byte("0")
}
v, err := strconv.Atoi(strings.Trim(string(version), "\n"))
if err != nil {
return err
}
if v > len(Migrations) {
log.Errorf("binary can migrate schemas up to version %03d but this schema is already at %03d", len(Migrations), v)
return ErrUnknownSchema
}
x := v
for _, m := range Migrations[v:] {
log.Noticef("running migration %03d changing schema to version %03d...\n", x, x+1)
err := m.Up(repoPath, dbPassword, testnet)
if err != nil {
log.Error(err)
return err
}
x++
}
return nil
}