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package featureflag
import (
"context"
"fmt"
"google.golang.org/grpc/metadata"
)
// IsEnabled checks if the feature flag is enabled for the passed context.
// Only return true if the metadata for the feature flag is set to "true"
func IsEnabled(ctx context.Context, flag string) bool {
if flag == "" {
return false
}
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
return false
}
val, ok := md[HeaderKey(flag)]
if !ok {
return false
}
return len(val) > 0 && val[0] == "true"
}
// IsDisabled is the inverse operation of IsEnabled
func IsDisabled(ctx context.Context, flag string) bool {
return !IsEnabled(ctx, flag)
}
// HeaderKey returns the feature flag key to be used in the metadata map
func HeaderKey(flag string) string {
return fmt.Sprintf("gitaly-feature-%s", flag)
}
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