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migrate.go
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migrate.go
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package migration
import (
"encoding/json"
"errors"
"os"
"path"
"regexp"
"strconv"
"strings"
liberr "github.com/jortel/go-utils/error"
"github.com/konveyor/tackle2-hub/database"
"github.com/konveyor/tackle2-hub/model"
"github.com/konveyor/tackle2-hub/nas"
"gorm.io/gorm"
)
// Migrate the hub by applying all necessary Migrations.
func Migrate(migrations []Migration) (err error) {
var db *gorm.DB
db, err = database.Open(false)
if err != nil {
return
}
defer func() {
if err != nil {
_ = database.Close(db)
}
}()
setting := &model.Setting{}
result := db.FirstOrCreate(setting, model.Setting{Key: VersionKey})
if result.Error != nil {
err = liberr.Wrap(result.Error)
return
}
err = database.Close(db)
if err != nil {
return
}
var v Version
if setting.Value != nil {
err = json.Unmarshal(setting.Value, &v)
if err != nil {
err = liberr.Wrap(err)
return
}
}
var start = v.Version
if start != 0 && start < MinimumVersion {
err = errors.New("unsupported database version")
return
} else if start >= MinimumVersion {
start -= MinimumVersion
}
for i := start; i < len(migrations); i++ {
m := migrations[i]
ver := i + MinimumVersion + 1
db, err = database.Open(false)
if err != nil {
err = liberr.Wrap(err, "version")
return
}
f := func(db *gorm.DB) (err error) {
log.Info("Running migration.", "version", ver)
err = m.Apply(db)
if err != nil {
return
}
err = setVersion(db, ver)
if err != nil {
return
}
return
}
err = db.Transaction(f)
if err != nil {
err = liberr.Wrap(err, "version", ver)
return
}
err = writeSchema(db, ver)
if err != nil {
err = liberr.Wrap(err, "version", ver)
return
}
err = database.Close(db)
if err != nil {
err = liberr.Wrap(err, "version", ver)
return
}
}
if Settings.Hub.Development {
log.Info("Running development auto-migration.")
err = autoMigrate(db, migrations[len(migrations)-1].Models())
if err != nil {
return
}
}
return
}
// Set the version record.
func setVersion(db *gorm.DB, version int) (err error) {
setting := &model.Setting{Key: VersionKey}
v := Version{Version: version}
value, _ := json.Marshal(v)
setting.Value = value
result := db.Where("key", VersionKey).Updates(setting)
if result.Error != nil {
err = liberr.Wrap(result.Error)
return
}
return
}
// AutoMigrate the database.
func autoMigrate(db *gorm.DB, models []interface{}) (err error) {
db, err = database.Open(false)
if err != nil {
err = liberr.Wrap(err)
return
}
err = db.AutoMigrate(models...)
if err != nil {
err = liberr.Wrap(err)
return
}
err = database.Close(db)
if err != nil {
err = liberr.Wrap(err)
return
}
return
}
// writeSchema - writes the migrated schema to a file.
func writeSchema(db *gorm.DB, version int) (err error) {
var list []struct {
Type string `gorm:"column:type"`
Name string `gorm:"column:name"`
Table string `gorm:"column:tbl_name"`
RootPage int `gorm:"column:rootpage"`
SQL string `gorm:"column:sql"`
}
db = db.Table("sqlite_schema")
db = db.Order("1, 2")
err = db.Find(&list).Error
if err != nil {
return
}
dir := path.Join(
path.Dir(Settings.Hub.DB.Path),
"migration")
err = nas.MkDir(dir, 0755)
f, err := os.Create(path.Join(dir, strconv.Itoa(version)))
if err != nil {
return
}
defer func() {
_ = f.Close()
}()
pattern := regexp.MustCompile(`[,()]`)
SQL := func(in string) (out string) {
indent := "\n "
for {
m := pattern.FindStringIndex(in)
if m == nil {
out += in
break
}
out += indent
out += in[:m[0]]
out += indent
out += in[m[0]:m[1]]
in = in[m[1]:]
}
return
}
for _, m := range list {
s := strings.Join([]string{
m.Type,
m.Name,
m.Table,
SQL(m.SQL),
}, "|")
_, err = f.WriteString(s + "\n")
if err != nil {
return
}
}
return
}