/
root.go
122 lines (98 loc) · 4.17 KB
/
root.go
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// Copyright © 2017 Ray Johnson <ray.johnson@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package cmd
import (
"log"
"os"
MQTT "github.com/eclipse/paho.mqtt.golang"
"github.com/docker/docker/pkg/term"
"github.com/spf13/cobra"
)
const usageTemplate = `Usage:{{if .Runnable}}
{{.UseLine}}{{end}}{{if .HasAvailableSubCommands}}
{{.CommandPath}} [command]{{end}}{{if gt (len .Aliases) 0}}
Aliases:
{{.NameAndAliases}}{{end}}{{if .HasAvailableSubCommands}}
Available Commands:{{range .Commands}}{{if (or .IsAvailableCommand (eq .Name "help"))}}
{{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableLocalFlags}}
Flags:
{{ wrappedFlagUsages . | trimRightSpace}}{{end}}{{if .HasAvailableInheritedFlags}}
Global Flags:
{{.InheritedFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if .HasHelpSubCommands}}
Additional help topics:{{range .Commands}}{{if .IsAdditionalHelpTopicCommand}}
{{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableSubCommands}}
Use "{{.CommandPath}} [command] --help" for more information about a command.{{end}}
`
const filesManInfo = `Many of the options for this command can be put in a config file.
You can create a config file at $HOME/.zap.toml. Configs found in the config file will override built-in
defaults but can be overridden by explict command-line options.
The format of the config file is written in Toml. Sections in brackets (e.g. [broker]) can be
referenced with the --broker flag. Values should be of the form qos = "1" and the keys will
have the same name as the option values listed above.`
var cfgFile string
// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute(ver string, rev string) {
version = ver
revision = rev
rootCmd := setupRootCommand()
if err := rootCmd.Execute(); err != nil {
os.Exit(1)
}
}
func setupRootCommand() *cobra.Command {
// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
Use: "zap",
Short: "Listen or publish to a MQTT broker",
Long: `zap - what happens when technology meets mosquito
zap is a little utility for publishing or subscribing to events for the
MQTT message bus`,
}
cobra.AddTemplateFunc("wrappedFlagUsages", wrappedFlagUsages)
rootCmd.AddCommand(
newSubscribeCommand(),
newVersionCommand(),
newPublishCommand(),
newStatsCommand(),
)
rootCmd.SetUsageTemplate(usageTemplate)
// Uncomment these to turn on debugging from within the mqtt library.
MQTT.ERROR = log.New(os.Stdout,
"ERROR: ",
log.Ldate|log.Ltime|log.Lshortfile)
MQTT.CRITICAL = log.New(os.Stdout,
"CRITICAL: ",
log.Ldate|log.Ltime|log.Lshortfile)
// MQTT.WARN = log.New(os.Stdout,
// "WARN: ",
// log.Ldate|log.Ltime|log.Lshortfile)
// MQTT.DEBUG = log.New(os.Stdout,
// "DEBUG: ",
// log.Ldate|log.Ltime|log.Lshortfile)
return rootCmd
}
func wrappedFlagUsages(cmd *cobra.Command) string {
width := 80
if ws, err := term.GetWinsize(0); err == nil {
width = int(ws.Width)
}
return cmd.Flags().FlagUsagesWrapped(width - 1)
}