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command.go
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command.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
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(featuregate.GlobalRegistry())
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(newComponentsCommand(set))
rootCmd.AddCommand(newValidateSubCommand(set, flagSet))
rootCmd.Flags().AddGoFlagSet(flagSet)
return rootCmd
}
func newCollectorWithFlags(set CollectorSettings, flags *flag.FlagSet) (*Collector, error) {
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)
}