cmd/polaris/root.go

// Copyright 2020 FairwindsOps Inc
//
// 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 cmd

import (
	"flag"
	"os"

	conf "github.com/fairwindsops/polaris/pkg/config"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
	"github.com/spf13/pflag"
)

var configPath string
var disallowExemptions bool
var logLevel string
var auditPath string
var displayName string

var (
	version string
)

func init() {
	// Flags
	rootCmd.PersistentFlags().StringVarP(&configPath, "config", "c", "", "Location of Polaris configuration file.")
	rootCmd.PersistentFlags().BoolVarP(&disallowExemptions, "disallow-exemptions", "", false, "Disallow any exemptions from configuration file.")
	rootCmd.PersistentFlags().StringVarP(&logLevel, "log-level", "", logrus.InfoLevel.String(), "Logrus log level.")
	flag.Parse()
	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
}

var config conf.Configuration

var rootCmd = &cobra.Command{
	Use:   "polaris",
	Short: "polaris",
	Long:  `Validation of best practices in your Kubernetes clusters.`,
	PersistentPreRun: func(cmd *cobra.Command, args []string) {
		parsedLevel, err := logrus.ParseLevel(logLevel)
		if err != nil {
			logrus.Errorf("log-level flag has invalid value %s", logLevel)
		} else {
			logrus.SetLevel(parsedLevel)
		}

		config, err = conf.ParseFile(configPath)
		if err != nil {
			logrus.Errorf("Error parsing config at %s: %v", configPath, err)
			os.Exit(1)
		}

		if disallowExemptions {
			config.DisallowExemptions = true
		}

	},
	Run: func(cmd *cobra.Command, args []string) {
		logrus.Error("You must specify a sub-command.")
		err := cmd.Help()
		if err != nil {
			logrus.Error(err)
		}
		os.Exit(1)
	},
}

// Execute the stuff
func Execute(VERSION string) {
	version = VERSION
	if err := rootCmd.Execute(); err != nil {
		logrus.Error(err)
		os.Exit(1)
	}
}