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cli.go
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cli.go
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package config
import (
"fmt"
"os"
"path/filepath"
graphite "github.com/criteo/graphite-remote-adapter/client/graphite/config"
"github.com/pkg/errors"
promlogflag "github.com/prometheus/common/promlog/flag"
"github.com/prometheus/common/version"
kingpin "gopkg.in/alecthomas/kingpin.v2"
)
// ParseCommandLine parse flags and args from cli.
func ParseCommandLine() *Config {
cfg := &Config{}
a := kingpin.New(filepath.Base(os.Args[0]), "The Graphite remote adapter")
a.Version(version.Print("graphite-remote-adapter"))
a.HelpFlag.Short('h')
a.Flag("config.file", "Graphite-remote-adapter configuration file path.").
StringVar(&cfg.ConfigFile)
a.Flag("web.listen-address", "Address to listen on for UI and telemtry.").
StringVar(&cfg.Web.ListenAddress)
a.Flag("web.telemetry-path", "Path to listen for telemtry.").
StringVar(&cfg.Web.TelemetryPath)
a.Flag("write.timeout",
"Maximum duration before timing out remote write requests.").
DurationVar(&cfg.Write.Timeout)
a.Flag("read.timeout",
"Maximum duration before timing out remote read requests.").
DurationVar(&cfg.Read.Timeout)
a.Flag("read.delay",
"Duration ignoring recent samples from all remote read requests.").
DurationVar(&cfg.Read.Delay)
a.Flag("read.ignore-error",
"Avoid returning error to promtheus returning empty result instead.").
BoolVar(&cfg.Read.IgnoreError)
// Add logLevel flag
a.Flag(promlogflag.LevelFlagName, promlogflag.LevelFlagHelp).
Default("info").SetValue(&cfg.LogLevel)
// Add graphite flag
graphite.AddCommandLine(a, &cfg.Graphite)
_, err := a.Parse(os.Args[1:])
if err != nil {
fmt.Fprintln(os.Stderr, errors.Wrapf(err, "Error parsing commandline arguments"))
a.Usage(os.Args[1:])
os.Exit(2)
}
return cfg
}