forked from open-telemetry/opentelemetry-collector
/
command.go
65 lines (58 loc) · 1.9 KB
/
command.go
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// Copyright The OpenTelemetry 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 otelcol // import "go.opentelemetry.io/collector/otelcol"
import (
"errors"
"flag"
"github.com/spf13/cobra"
"go.opentelemetry.io/collector/featuregate"
)
// NewCommand constructs a new cobra.Command using the given CollectorSettings.
func NewCommand(set CollectorSettings) *cobra.Command {
flagSet := flags()
rootCmd := &cobra.Command{
Use: set.BuildInfo.Command,
Version: set.BuildInfo.Version,
SilenceUsage: true,
RunE: func(cmd *cobra.Command, args []string) error {
col, err := newCollectorWithFlags(set, flagSet)
if err != nil {
return err
}
return col.Run(cmd.Context())
},
}
rootCmd.AddCommand(newBuildSubCommand(set))
rootCmd.Flags().AddGoFlagSet(flagSet)
return rootCmd
}
func newCollectorWithFlags(set CollectorSettings, flags *flag.FlagSet) (*Collector, error) {
for id, enabled := range getFeatureGatesFlag(flags) {
if err := featuregate.GlobalRegistry().Set(id, enabled); err != nil {
return nil, err
}
}
if set.ConfigProvider == nil {
configFlags := getConfigFlag(flags)
if len(configFlags) == 0 {
return nil, errors.New("at least one config flag must be provided")
}
var err error
set.ConfigProvider, err = NewConfigProvider(newDefaultConfigProviderSettings(configFlags))
if err != nil {
return nil, err
}
}
return NewCollector(set)
}