mirror of
https://github.com/hibiken/asynq.git
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113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
// Copyright 2020 Kentaro Hibino. All rights reserved.
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// Use of this source code is governed by a MIT license
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// that can be found in the LICENSE file.
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package cmd
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import (
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"fmt"
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"io"
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"os"
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"strings"
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"text/tabwriter"
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"github.com/spf13/cobra"
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homedir "github.com/mitchellh/go-homedir"
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"github.com/spf13/viper"
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)
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var cfgFile string
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// Flags
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var uri string
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var db int
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var password string
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// rootCmd represents the base command when called without any subcommands
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var rootCmd = &cobra.Command{
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Use: "asynqmon",
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Short: "A monitoring tool for asynq queues",
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Long: `Asynqmon is a montoring CLI to inspect tasks and queues managed by asynq.`,
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}
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// Execute adds all child commands to the root command and sets flags appropriately.
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// This is called by main.main(). It only needs to happen once to the rootCmd.
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func Execute() {
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if err := rootCmd.Execute(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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func init() {
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cobra.OnInitialize(initConfig)
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rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file to set flag defaut values (default is $HOME/.asynqmon.yaml)")
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rootCmd.PersistentFlags().StringVarP(&uri, "uri", "u", "127.0.0.1:6379", "redis server URI")
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rootCmd.PersistentFlags().IntVarP(&db, "db", "n", 0, "redis database number (default is 0)")
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rootCmd.PersistentFlags().StringVarP(&password, "password", "p", "", "password to use when connecting to redis server")
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viper.BindPFlag("uri", rootCmd.PersistentFlags().Lookup("uri"))
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viper.BindPFlag("db", rootCmd.PersistentFlags().Lookup("db"))
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viper.BindPFlag("password", rootCmd.PersistentFlags().Lookup("password"))
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}
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// initConfig reads in config file and ENV variables if set.
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func initConfig() {
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if cfgFile != "" {
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// Use config file from the flag.
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viper.SetConfigFile(cfgFile)
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} else {
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// Find home directory.
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home, err := homedir.Dir()
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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// Search config in home directory with name ".asynqmon" (without extension).
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viper.AddConfigPath(home)
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viper.SetConfigName(".asynqmon")
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}
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viper.AutomaticEnv() // read in environment variables that match
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// If a config file is found, read it in.
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if err := viper.ReadInConfig(); err == nil {
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fmt.Println("Using config file:", viper.ConfigFileUsed())
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}
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}
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// printTable is a helper function to print data in table format.
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//
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// cols is a list of headers and printRow specifies how to print rows.
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//
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// Example:
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// type User struct {
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// Name string
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// Addr string
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// Age int
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// }
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// data := []*User{{"user1", "addr1", 24}, {"user2", "addr2", 42}, ...}
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// cols := []string{"Name", "Addr", "Age"}
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// printRows := func(w io.Writer, tmpl string) {
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// for _, u := range data {
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// fmt.Fprintf(w, tmpl, u.Name, u.Addr, u.Age)
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// }
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// }
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// printTable(cols, printRows)
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func printTable(cols []string, printRows func(w io.Writer, tmpl string)) {
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format := strings.Repeat("%v\t", len(cols)) + "\n"
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tw := new(tabwriter.Writer).Init(os.Stdout, 0, 8, 2, ' ', 0)
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var headers []interface{}
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var seps []interface{}
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for _, name := range cols {
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headers = append(headers, name)
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seps = append(seps, strings.Repeat("-", len(name)))
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}
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fmt.Fprintf(tw, format, headers...)
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fmt.Fprintf(tw, format, seps...)
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printRows(tw, format)
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tw.Flush()
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}
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