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// Copyright 2023 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"context"
"fmt"
"github.com/google/subcommands"
"google.golang.org/protobuf/encoding/prototext"
"gvisor.dev/gvisor/pkg/metric"
"gvisor.dev/gvisor/runsc/cmd/util"
"gvisor.dev/gvisor/runsc/flag"
)
// MetricMetadata implements subcommands.Command for the "metric-metadata" command.
type MetricMetadata struct {
}
// Name implements subcommands.Command.Name.
func (*MetricMetadata) Name() string {
return "metric-metadata"
}
// Synopsis implements subcommands.Command.Synopsis.
func (*MetricMetadata) Synopsis() string {
return "export metric metadata of metrics registered in this build, in text proto format"
}
// Usage implements subcommands.Command.Usage.
func (*MetricMetadata) Usage() string {
return "metric-metadata"
}
// SetFlags implements subcommands.Command.SetFlags.
func (m *MetricMetadata) SetFlags(f *flag.FlagSet) {
}
// Execute implements subcommands.Command.Execute.
func (m *MetricMetadata) Execute(ctx context.Context, f *flag.FlagSet, args ...any) subcommands.ExitStatus {
if err := metric.Initialize(); err != nil {
util.Fatalf("Cannot initialize metrics: %v", err)
}
registration, err := metric.GetMetricRegistration()
if err != nil {
util.Fatalf("Cannot get metric registration data: %v", err)
}
fmt.Println(prototext.MarshalOptions{Multiline: true, EmitASCII: true}.Format(registration))
return subcommands.ExitSuccess
}
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