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migrations.go
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migrations.go
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package migrations
import (
"context"
"fmt"
"github.com/hashicorp/go-version"
"github.com/pydio/cells/common/utils/migrations"
"github.com/pydio/cells/x/configx"
)
type migrationConfig struct {
target *version.Version
up migrationConfigFunc
}
type migrationConfigFunc func(*configx.Values) func(context.Context) error
type migrationFunc func(configx.Values) error
var (
configMigrations []*migrationConfig
configKeysDeletes = []string{
"services/pydio.grpc.auth/dex",
}
)
func add(target *version.Version, m migrationConfigFunc) {
configMigrations = append(configMigrations, &migrationConfig{target, m})
}
func getMigration(f migrationFunc) migrationConfigFunc {
return func(c *configx.Values) func(context.Context) error {
return func(context.Context) error {
return f(*c)
}
}
}
// UpgradeConfigsIfRequired applies all registered configMigration functions
// Returns true if there was a change and save is required, error if something nasty happened
func UpgradeConfigsIfRequired(config configx.Values, targetVersion *version.Version) (bool, error) {
v := config.Val("version")
lastVersion, err := version.NewVersion(v.Default("0.0.0").String())
if err != nil {
return false, err
}
if !lastVersion.LessThan(targetVersion) {
return false, nil
}
var mm []*migrations.Migration
for _, m := range configMigrations {
mm = append(mm, &migrations.Migration{
TargetVersion: m.target,
Up: m.up(&config),
})
}
appliedVersion, err := migrations.Apply(context.Background(), lastVersion, targetVersion, mm)
if err != nil {
return false, err
}
if !appliedVersion.GreaterThan(lastVersion) {
return false, nil
}
if err := v.Set(appliedVersion.String()); err != nil {
return false, err
}
return true, nil
}
// UpdateKeys replace a key with a new one
func UpdateKeys(config configx.Values, m map[string]string) error {
for oldPath, newPath := range m {
oldVal := config.Val(oldPath)
newVal := config.Val(newPath)
if oldVal.Get() != nil {
// fmt.Printf("[Configs] Upgrading: renaming key %s to %s\n", oldPath, newPath)
if err := newVal.Set(oldVal.Get()); err != nil {
return err
}
if err := oldVal.Del(); err != nil {
return err
}
}
}
return nil
}
// UpdateVals replace a val with a new one
func UpdateVals(config configx.Values, m map[string]string) (bool, error) {
var all interface{}
err := config.Scan(&all)
if err != nil {
return false, err
}
var save bool
all = parseAndReplace(all, func(a map[string]interface{}) map[string]interface{} {
for oldV, newV := range m {
for k, v := range a {
if vv, ok := v.(string); ok && vv == oldV {
fmt.Printf("[Configs] Upgrading: renaming val %s to %s\n", oldV, newV)
a[k] = newV
save = true
}
}
}
return a
})
if !save {
return save, nil
}
config.Set(all)
return true, nil
}
func stringSliceEqual(a, b []string) bool {
if len(a) != len(b) {
return false
}
for i, v := range a {
if v != b[i] {
return false
}
}
return true
}
type ReplacerFunc func(map[string]interface{}) map[string]interface{}
func parseAndReplace(i interface{}, replacer ReplacerFunc) interface{} {
switch m := i.(type) {
case []map[string]interface{}:
var new []map[string]interface{}
for _, mm := range m {
new = append(new, parseAndReplace(mm, replacer).(map[string]interface{}))
}
return new
case map[string]interface{}:
new := replacer(m)
for k, v := range new {
new[k] = parseAndReplace(v, replacer)
}
return new
case []interface{}:
var new []interface{}
for _, mm := range m {
new = append(new, parseAndReplace(mm, replacer))
}
return new
}
return i
}