ipld-eth-server/cmd/root.go

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// VulcanizeDB
// Copyright © 2019 Vulcanize
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"fmt"
"os"
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"path/filepath"
"strings"
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"github.com/joho/godotenv"
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log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/spf13/viper"
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"github.com/vulcanize/ipld-eth-server/v3/pkg/prom"
)
var (
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cfgFile string
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envFile string
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subCommand string
logWithCommand log.Entry
)
var rootCmd = &cobra.Command{
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Use: "ipld-eth-server",
PersistentPreRun: initFuncs,
}
func Execute() {
log.Info("----- Starting IPFS blockchain watcher -----")
if err := rootCmd.Execute(); err != nil {
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log.Fatal(err)
}
}
func initFuncs(cmd *cobra.Command, args []string) {
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viper.BindEnv("log.file", "LOGRUS_FILE")
logfile := viper.GetString("log.file")
if logfile != "" {
file, err := os.OpenFile(logfile,
os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
if err == nil {
log.Infof("Directing output to %s", logfile)
log.SetOutput(file)
} else {
log.SetOutput(os.Stdout)
log.Info("Failed to log to file, using default stdout")
}
} else {
log.SetOutput(os.Stdout)
}
if err := logLevel(); err != nil {
log.Fatal("Could not set log level: ", err)
}
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if viper.GetBool("metrics") {
prom.Init()
}
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if viper.GetBool("prom.http") {
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addr := fmt.Sprintf(
"%s:%s",
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viper.GetString("prom.http.addr"),
viper.GetString("prom.http.port"),
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)
prom.Serve(addr)
}
}
func logLevel() error {
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viper.BindEnv("log.level", "LOGRUS_LEVEL")
lvl, err := log.ParseLevel(viper.GetString("log.level"))
if err != nil {
return err
}
log.SetLevel(lvl)
if lvl > log.InfoLevel {
log.SetReportCaller(true)
}
log.Info("Log level set to ", lvl.String())
return nil
}
func init() {
cobra.OnInitialize(initConfig)
viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
viper.AutomaticEnv()
rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file location")
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rootCmd.PersistentFlags().StringVar(&envFile, "env", "", "environment file location")
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rootCmd.PersistentFlags().String("client-ipcPath", "", "location of geth.ipc file")
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rootCmd.PersistentFlags().String("log-level", log.InfoLevel.String(), "log level (trace, debug, info, warn, error, fatal, panic)")
rootCmd.PersistentFlags().String("log-file", "", "file path for logging")
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rootCmd.PersistentFlags().Bool("metrics", false, "enable metrics")
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rootCmd.PersistentFlags().Bool("prom-http", false, "enable http service for prometheus")
rootCmd.PersistentFlags().String("prom-http-addr", "127.0.0.1", "http host for prometheus")
rootCmd.PersistentFlags().String("prom-http-port", "8090", "http port for prometheus")
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viper.BindPFlag("log.level", rootCmd.PersistentFlags().Lookup("log-level"))
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viper.BindPFlag("log.file", rootCmd.PersistentFlags().Lookup("log-file"))
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viper.BindPFlag("metrics", rootCmd.PersistentFlags().Lookup("metrics"))
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viper.BindPFlag("prom.http", rootCmd.PersistentFlags().Lookup("prom-http"))
viper.BindPFlag("prom.http.addr", rootCmd.PersistentFlags().Lookup("prom-http-addr"))
viper.BindPFlag("prom.http.port", rootCmd.PersistentFlags().Lookup("prom-http-port"))
}
func initConfig() {
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if cfgFile == "" && envFile == "" {
log.Fatal("No configuration file specified, use --config , --env flag to provide configuration")
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}
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if cfgFile != "" {
if filepath.Ext(cfgFile) != ".toml" {
log.Fatal("Provide .toml file for --config flag")
}
viper.SetConfigFile(cfgFile)
if err := viper.ReadInConfig(); err != nil {
log.Fatalf("Couldn't read config file: %s", err.Error())
}
log.Infof("Using config file: %s", viper.ConfigFileUsed())
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}
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if envFile != "" {
if filepath.Ext(envFile) != ".env" {
log.Fatal("Provide .env file for --env flag")
}
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if err := godotenv.Load(envFile); err != nil {
log.Fatalf("Failed to set environment variable from env file: %s", err.Error())
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}
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log.Infof("Using env file: %s", envFile)
}
}