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deprecated.go
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/
deprecated.go
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package flagext
import (
"flag"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
)
// DeprecatedFlagsUsed is the metric that counts deprecated flags set.
var DeprecatedFlagsUsed = promauto.NewCounter(
prometheus.CounterOpts{
Name: "deprecated_flags_inuse_total",
Help: "The number of deprecated flags currently set.",
})
type deprecatedFlag struct {
name string
logger log.Logger
}
func (deprecatedFlag) String() string {
return "deprecated"
}
func (d deprecatedFlag) Set(string) error {
level.Warn(d.logger).Log("msg", "flag disabled", "flag", d.name)
DeprecatedFlagsUsed.Inc()
return nil
}
// DeprecatedFlag logs a warning when you try to use it.
func DeprecatedFlag(f *flag.FlagSet, name, message string, logger log.Logger) {
f.Var(deprecatedFlag{name: name, logger: logger}, name, message)
}