Files
team/server/channels/app/featureflag/feature_flags_sync.go
Jesse HallamandGitHub edf2075381 MM-68149: Upgrade to Go 1.26.2 (#36418)
* MM-68149: upgrade to Go 1.26.2

Update go directive in go.mod and .go-version.

* MM-68149: replace pointer helpers with Go 1.26 new()

Go 1.26 extends the built-in new() to accept an initial value expression,
making typed-pointer helpers like model.NewPointer(x), bToP(x), and boolPtr(x)
redundant. Replace every call site with new(x) and remove the now-unused
helper functions and their //go:fix inline directives.

* MM-68149: apply go fix for reflect API and format-string changes

- reflect.Ptr → reflect.Pointer (renamed in Go 1.18, deprecated alias removed in 1.26)
- reflect range-over-struct: for i := 0; i < t.NumField(); i++ → for field := range t.Fields()
  and the equivalent for Methods() and interface types
- Fix format-string concatenation and variadic-arg mismatches flagged by go vet

* MM-68149: update JPEG fixtures and test infrastructure for Go 1.26 encoder

Go 1.26 ships a new image/jpeg encoder that produces slightly different output.
Regenerate all JPEG fixture files and switch the comparison helpers from
byte-equality to pixel-level comparison with a small per-channel tolerance,
so minor encoder drift across patch versions is handled automatically.

Add -update-fixtures flag to make it easy to regenerate fixtures after future
major Go upgrades. Document the update procedure in tests/README.md.

* MM-68149: CI check that go fix ./... produces no changes

* Fix real bugs flagged by CodeRabbit review

- group.go: set newGroup.MemberCount not group.MemberCount (member count
  was populated on the wrong variable and lost before publish/return)
- file_test.go: guard compareImage(GetFilePreview) on the preview slice
  length, not the thumbnail slice length (copy-paste error)
- config_test.go: remove duplicate MinimumLength assignment

* fixup! Fix real bugs flagged by CodeRabbit review
2026-05-12 15:59:12 +00:00

111 lines
3.2 KiB
Go

// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package featureflag
import (
"math"
"reflect"
"strconv"
"strings"
"github.com/pkg/errors"
"github.com/splitio/go-client/v6/splitio/client"
"github.com/splitio/go-client/v6/splitio/conf"
"github.com/mattermost/mattermost/server/public/model"
"github.com/mattermost/mattermost/server/public/shared/mlog"
)
type SyncParams struct {
ServerID string
SplitKey string
SyncIntervalSeconds int
Log *mlog.Logger
Attributes map[string]any
}
type Synchronizer struct {
SyncParams
client *client.SplitClient
stop chan struct{}
stopped chan struct{}
}
var featureNames = getStructFields(model.FeatureFlags{})
func NewSynchronizer(params SyncParams) (*Synchronizer, error) {
cfg := conf.Default()
if params.Log != nil {
cfg.Logger = &splitLogger{wrappedLog: params.Log.With(mlog.String("service", "split"))}
} else {
cfg.LoggerConfig.LogLevel = math.MinInt32
}
factory, err := client.NewSplitFactory(params.SplitKey, cfg)
if err != nil {
return nil, errors.Wrap(err, "unable to create split factory")
}
return &Synchronizer{
SyncParams: params,
client: factory.Client(),
stop: make(chan struct{}),
stopped: make(chan struct{}),
}, nil
}
// EnsureReady blocks until the synchronizer is ready to update feature flag values
func (f *Synchronizer) EnsureReady() error {
if err := f.client.BlockUntilReady(10); err != nil {
return errors.Wrap(err, "split.io client could not initialize")
}
return nil
}
func (f *Synchronizer) UpdateFeatureFlagValues(base model.FeatureFlags) model.FeatureFlags {
featuresMap := f.client.Treatments(f.ServerID, featureNames, f.Attributes)
ffm := featureFlagsFromMap(featuresMap, base)
return ffm
}
func (f *Synchronizer) Close() {
f.client.Destroy()
}
// featureFlagsFromMap sets the feature flags from a map[string]string.
// It starts with baseFeatureFlags and only sets values that are
// given by the upstream management system.
// Makes the assumption that all feature flags are strings or booleans.
// Strings are converted to booleans by considering case insensitive "on" or any value considered by strconv.ParseBool as true and any other value as false.
func featureFlagsFromMap(featuresMap map[string]string, baseFeatureFlags model.FeatureFlags) model.FeatureFlags {
refStruct := reflect.ValueOf(&baseFeatureFlags).Elem()
for fieldName, fieldValue := range featuresMap {
refField := refStruct.FieldByName(fieldName)
// "control" is returned by split.io if the treatment is not found, in this case we should use the default value.
if !refField.IsValid() || !refField.CanSet() || fieldValue == "control" {
continue
}
switch refField.Type().Kind() {
case reflect.Bool:
parsedBoolValue, _ := strconv.ParseBool(fieldValue)
refField.Set(reflect.ValueOf(strings.ToLower(fieldValue) == "on" || parsedBoolValue))
default:
refField.Set(reflect.ValueOf(fieldValue))
}
}
return baseFeatureFlags
}
func getStructFields(s any) []string {
structType := reflect.TypeOf(s)
fieldNames := make([]string, 0, structType.NumField())
for field := range structType.Fields() {
fieldNames = append(fieldNames, field.Name)
}
return fieldNames
}