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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"
"go.opentelemetry.io/collector/internal/featuregates"
)
// NewCommand constructs a new cobra.Command using the given CollectorSettings.
// Any URIs specified in CollectorSettings.ConfigProviderSettings.ResolverSettings.URIs
// are considered defaults and will be overwritten by config flags passed as
// command-line arguments to the executable.
// At least one Provider must be set.
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, _ []string) error {
err := updateSettingsUsingFlags(&set, flagSet)
if err != nil {
return err
}
col, err := NewCollector(set)
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
}
// NewCommandMustSetProvider constructs a new cobra.Command using the given CollectorSettings.
// Any URIs specified in CollectorSettings.ConfigProviderSettings.ResolverSettings.URIs
// are considered defaults and will be overwritten by config flags passed as
// command-line arguments to the executable.
// At least one Provider must be supplied via CollectorSettings.ConfigProviderSettings.ResolverSettings.ProviderFactories.
//
// Deprecated: [v0.104.0] use NewCommand instead
func NewCommandMustSetProvider(set CollectorSettings) *cobra.Command {
return NewCommand(set)
}
// Puts command line flags from flags into the CollectorSettings, to be used during config resolution.
func updateSettingsUsingFlags(set *CollectorSettings, flags *flag.FlagSet) error {
resolverSet := &set.ConfigProviderSettings.ResolverSettings
configFlags := getConfigFlag(flags)
if len(configFlags) > 0 {
resolverSet.URIs = configFlags
}
if len(resolverSet.URIs) == 0 {
return errors.New("at least one config flag must be provided")
}
if featuregates.UseUnifiedEnvVarExpansionRules.IsEnabled() && set.ConfigProviderSettings.ResolverSettings.DefaultScheme == "" {
set.ConfigProviderSettings.ResolverSettings.DefaultScheme = "env"
}
if len(resolverSet.ProviderFactories) == 0 {
return errors.New("at least one Provider must be supplied")
}
return nil
}