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config.go
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/
config.go
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package main
import (
"encoding/json"
"flag"
"io/ioutil"
"os"
"path/filepath"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
)
type config struct {
Monitor monitorConfig `json:"monitor"`
KubeconfigPath string `json:"kubeconfigPath"`
}
type monitorConfig struct {
Contexts []string `json:"contexts"`
}
func MustParseConfig() config {
cfg, err := parseConfig()
if err != nil {
log.Fatal(err)
}
return cfg
}
func parseConfig() (config, error) {
var (
cfg config
configFile string
)
flag.StringVar(&configFile, "config", "./config.json", "config file")
flag.Parse()
bytes, err := ioutil.ReadFile(configFile)
if err != nil {
return cfg, errors.Wrap(err, "failed to read config file")
}
err = json.Unmarshal(bytes, &cfg)
if err != nil {
return cfg, errors.Wrap(err, "failed to unmarshal config")
}
if cfg.KubeconfigPath == "" {
dir, _ := os.UserHomeDir()
cfg.KubeconfigPath = filepath.Join(dir, ".kube", "config")
}
return cfg, nil
}