featureflag

Documentation

Index

• Constants
• Variables
• func AllFlags(ctx context.Context) []string
• func HeaderKey(flag string) string
• func IncomingCtxWithDisabledFeatureFlag(ctx context.Context, flag FeatureFlag) context.Context
• func IncomingCtxWithFeatureFlag(ctx context.Context, flag FeatureFlag) context.Context
• func IncomingCtxWithRubyFeatureFlagValue(ctx context.Context, flag FeatureFlag, enabled bool) context.Context
• func IsDisabled(ctx context.Context, flag FeatureFlag) bool
• func IsEnabled(ctx context.Context, flag FeatureFlag) bool
• func OutgoingCtxWithDisabledFeatureFlags(ctx context.Context, flags ...FeatureFlag) context.Context
• func OutgoingCtxWithFeatureFlagValue(ctx context.Context, flag FeatureFlag, val string) context.Context
• func OutgoingCtxWithFeatureFlags(ctx context.Context, flags ...FeatureFlag) context.Context
• func OutgoingCtxWithRubyFeatureFlagValue(ctx context.Context, flag FeatureFlag, val string) context.Context
• func OutgoingCtxWithRubyFeatureFlags(ctx context.Context, flags ...FeatureFlag) context.Context
• func OutgoingWithRaw(ctx context.Context, flags Raw) context.Context
• type FeatureFlag
• type Raw
  • func RawFromContext(ctx context.Context) Raw

Constants

const Delim = ":"

Delim is a delimiter used between a feature flag name and its value.

Variables

var (
	// ReferenceTransactions will handle Git reference updates via the transaction service for strong consistency
	ReferenceTransactions = FeatureFlag{Name: "reference_transactions", OnByDefault: true}
	// GoUpdateRemoteMirror enables the Go implementation of UpdateRemoteMirror
	GoUpdateRemoteMirror = FeatureFlag{Name: "go_update_remote_mirror", OnByDefault: false}
	// FetchInternalRemoteErrors makes FetchInternalRemote return actual errors instead of a boolean
	FetchInternalRemoteErrors = FeatureFlag{Name: "fetch_internal_remote_errors", OnByDefault: false}
	// TxConfig enables transactional voting for SetConfig and DeleteConfig RPCs.
	TxConfig = FeatureFlag{Name: "tx_config", OnByDefault: false}
	// TxRemote enables transactional voting for AddRemote and DeleteRemote.
	TxRemote = FeatureFlag{Name: "tx_remote", OnByDefault: false}
)

A set of feature flags used in Gitaly and Praefect. In order to support coverage of combined features usage all feature flags should be marked as enabled for the test. NOTE: if you add a new feature flag please add it to the `All` list defined below.

var All = []FeatureFlag{
	ReferenceTransactions,
	GoUpdateRemoteMirror,
	FetchInternalRemoteErrors,
	TxConfig,
	TxRemote,
}

All includes all feature flags.

Functions

func AllFlags

func AllFlags(ctx context.Context) []string

AllFlags returns all feature flags with their value that use the Gitaly metadata prefix. Note: results will not be sorted.

func HeaderKey

func HeaderKey(flag string) string

HeaderKey returns the feature flag key to be used in the metadata map

func IncomingCtxWithDisabledFeatureFlag

func IncomingCtxWithDisabledFeatureFlag(ctx context.Context, flag FeatureFlag) context.Context

IncomingCtxWithDisabledFeatureFlag marks feature flag as disabled in the incoming context.

func IncomingCtxWithFeatureFlag

func IncomingCtxWithFeatureFlag(ctx context.Context, flag FeatureFlag) context.Context

IncomingCtxWithFeatureFlag is used to enable a feature flag in the incoming context. This is NOT meant for use in clients that transfer the context across process boundaries.

func IncomingCtxWithRubyFeatureFlagValue

func IncomingCtxWithRubyFeatureFlagValue(ctx context.Context, flag FeatureFlag, enabled bool) context.Context

IncomingCtxWithRubyFeatureFlagValue sets the feature flags status in the context.

func IsDisabled

func IsDisabled(ctx context.Context, flag FeatureFlag) bool

IsDisabled is the inverse of IsEnabled

func IsEnabled

func IsEnabled(ctx context.Context, flag FeatureFlag) bool

IsEnabled checks if the feature flag is enabled for the passed context. Only returns true if the metadata for the feature flag is set to "true"

func OutgoingCtxWithDisabledFeatureFlags

func OutgoingCtxWithDisabledFeatureFlags(ctx context.Context, flags ...FeatureFlag) context.Context

OutgoingCtxWithDisabledFeatureFlags is used to explicitly disable "on by default" feature flags in the outgoing context metadata. The returned context is meant to be used in a client where the outcoming context is transferred to an incoming context.

func OutgoingCtxWithFeatureFlagValue

func OutgoingCtxWithFeatureFlagValue(ctx context.Context, flag FeatureFlag, val string) context.Context

OutgoingCtxWithFeatureFlagValue is used to set feature flags with an explicit value. only "true" or "false" are valid values. Any other value will be ignored.

func OutgoingCtxWithFeatureFlags

func OutgoingCtxWithFeatureFlags(ctx context.Context, flags ...FeatureFlag) context.Context

OutgoingCtxWithFeatureFlags is used to enable feature flags in the outgoing context metadata. The returned context is meant to be used in a client where the outcoming context is transferred to an incoming context.

func OutgoingCtxWithRubyFeatureFlagValue

func OutgoingCtxWithRubyFeatureFlagValue(ctx context.Context, flag FeatureFlag, val string) context.Context

OutgoingCtxWithRubyFeatureFlagValue returns context populated with outgoing metadata that contains ruby feature flags passed in.

func OutgoingCtxWithRubyFeatureFlags

func OutgoingCtxWithRubyFeatureFlags(ctx context.Context, flags ...FeatureFlag) context.Context

func OutgoingWithRaw

func OutgoingWithRaw(ctx context.Context, flags Raw) context.Context

OutgoingWithRaw returns a new context with raw flags appended into the outgoing metadata.

Types

type FeatureFlag

type FeatureFlag struct {
	Name        string `json:"name"`
	OnByDefault bool   `json:"on_by_default"`
}

type Raw

type Raw map[string]string

Raw contains feature flags and their values in their raw form with header prefix in place and values unparsed.

func RawFromContext

func RawFromContext(ctx context.Context) Raw

RawFromContext returns a map that contains all feature flags with their values. The feature flags are in their raw format with the header prefix in place. If multiple values are set a flag, the first occurrence is used.

This is mostly intended for propagating the feature flags by other means than the metadata, for example into the hooks through the environment.