mirror of
https://github.com/spf13/cobra
synced 2024-06-26 05:39:09 +00:00
Retab README.md
This commit is contained in:
Albert Nigmatzianov
parent
1723331773
commit
cb747385b3
366
README.md
366
README.md
|
|
@ -151,17 +151,17 @@ In a Cobra app, typically the main.go file is very bare. It serves one purpose:
|
|||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"fmt"
|
||||
"os"
|
||||
|
||||
"{pathToYourApp}/cmd"
|
||||
"{pathToYourApp}/cmd"
|
||||
)
|
||||
|
||||
func main() {
|
||||
if err := cmd.RootCmd.Execute(); err != nil {
|
||||
fmt.Println(err)
|
||||
os.Exit(1)
|
||||
}
|
||||
if err := cmd.RootCmd.Execute(); err != nil {
|
||||
fmt.Println(err)
|
||||
os.Exit(1)
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -277,14 +277,14 @@ Ideally you place this in app/cmd/root.go:
|
|||
|
||||
```go
|
||||
var RootCmd = &cobra.Command{
|
||||
Use: "hugo",
|
||||
Short: "Hugo is a very fast static site generator",
|
||||
Long: `A Fast and Flexible Static Site Generator built with
|
||||
Use: "hugo",
|
||||
Short: "Hugo is a very fast static site generator",
|
||||
Long: `A Fast and Flexible Static Site Generator built with
|
||||
love by spf13 and friends in Go.
|
||||
Complete documentation is available at http://hugo.spf13.com`,
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
// Do Stuff Here
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
// Do Stuff Here
|
||||
},
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -294,54 +294,54 @@ For example cmd/root.go:
|
|||
|
||||
```go
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"fmt"
|
||||
"os"
|
||||
|
||||
homedir "github.com/mitchellh/go-homedir"
|
||||
"github.com/spf13/cobra"
|
||||
"github.com/spf13/viper"
|
||||
homedir "github.com/mitchellh/go-homedir"
|
||||
"github.com/spf13/cobra"
|
||||
"github.com/spf13/viper"
|
||||
)
|
||||
|
||||
func init() {
|
||||
cobra.OnInitialize(initConfig)
|
||||
RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")
|
||||
RootCmd.PersistentFlags().StringVarP(&projectBase, "projectbase", "b", "", "base project directory eg. github.com/spf13/")
|
||||
RootCmd.PersistentFlags().StringP("author", "a", "YOUR NAME", "Author name for copyright attribution")
|
||||
RootCmd.PersistentFlags().StringVarP(&userLicense, "license", "l", "", "Name of license for the project (can provide `licensetext` in config)")
|
||||
RootCmd.PersistentFlags().Bool("viper", true, "Use Viper for configuration")
|
||||
viper.BindPFlag("author", RootCmd.PersistentFlags().Lookup("author"))
|
||||
viper.BindPFlag("projectbase", RootCmd.PersistentFlags().Lookup("projectbase"))
|
||||
viper.BindPFlag("useViper", RootCmd.PersistentFlags().Lookup("viper"))
|
||||
viper.SetDefault("author", "NAME HERE <EMAIL ADDRESS>")
|
||||
viper.SetDefault("license", "apache")
|
||||
cobra.OnInitialize(initConfig)
|
||||
RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")
|
||||
RootCmd.PersistentFlags().StringVarP(&projectBase, "projectbase", "b", "", "base project directory eg. github.com/spf13/")
|
||||
RootCmd.PersistentFlags().StringP("author", "a", "YOUR NAME", "Author name for copyright attribution")
|
||||
RootCmd.PersistentFlags().StringVarP(&userLicense, "license", "l", "", "Name of license for the project (can provide `licensetext` in config)")
|
||||
RootCmd.PersistentFlags().Bool("viper", true, "Use Viper for configuration")
|
||||
viper.BindPFlag("author", RootCmd.PersistentFlags().Lookup("author"))
|
||||
viper.BindPFlag("projectbase", RootCmd.PersistentFlags().Lookup("projectbase"))
|
||||
viper.BindPFlag("useViper", RootCmd.PersistentFlags().Lookup("viper"))
|
||||
viper.SetDefault("author", "NAME HERE <EMAIL ADDRESS>")
|
||||
viper.SetDefault("license", "apache")
|
||||
}
|
||||
|
||||
func Execute() {
|
||||
RootCmd.Execute()
|
||||
RootCmd.Execute()
|
||||
}
|
||||
|
||||
func initConfig() {
|
||||
// Don't forget to read config either from cfgFile or from home directory!
|
||||
if cfgFile != "" {
|
||||
// Use config file from the flag.
|
||||
viper.SetConfigFile(cfgFile)
|
||||
} else {
|
||||
// Find home directory.
|
||||
home, err := homedir.Dir()
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
os.Exit(1)
|
||||
}
|
||||
if cfgFile != "" {
|
||||
// Use config file from the flag.
|
||||
viper.SetConfigFile(cfgFile)
|
||||
} else {
|
||||
// Find home directory.
|
||||
home, err := homedir.Dir()
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
os.Exit(1)
|
||||
}
|
||||
|
||||
// Search config in home directory with name ".cobra" (without extension).
|
||||
viper.AddConfigPath(home)
|
||||
viper.SetConfigName(".cobra")
|
||||
}
|
||||
// Search config in home directory with name ".cobra" (without extension).
|
||||
viper.AddConfigPath(home)
|
||||
viper.SetConfigName(".cobra")
|
||||
}
|
||||
|
||||
if err := viper.ReadInConfig(); err != nil {
|
||||
fmt.Println("Can't read config:", err)
|
||||
os.Exit(1)
|
||||
}
|
||||
if err := viper.ReadInConfig(); err != nil {
|
||||
fmt.Println("Can't read config:", err)
|
||||
os.Exit(1)
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -356,17 +356,17 @@ In a Cobra app, typically the main.go file is very bare. It serves, one purpose,
|
|||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"fmt"
|
||||
"os"
|
||||
|
||||
"{pathToYourApp}/cmd"
|
||||
"{pathToYourApp}/cmd"
|
||||
)
|
||||
|
||||
func main() {
|
||||
if err := cmd.RootCmd.Execute(); err != nil {
|
||||
fmt.Println(err)
|
||||
os.Exit(1)
|
||||
}
|
||||
if err := cmd.RootCmd.Execute(); err != nil {
|
||||
fmt.Println(err)
|
||||
os.Exit(1)
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -382,21 +382,21 @@ populate it with the following:
|
|||
package cmd
|
||||
|
||||
import (
|
||||
"github.com/spf13/cobra"
|
||||
"fmt"
|
||||
"github.com/spf13/cobra"
|
||||
"fmt"
|
||||
)
|
||||
|
||||
func init() {
|
||||
RootCmd.AddCommand(versionCmd)
|
||||
RootCmd.AddCommand(versionCmd)
|
||||
}
|
||||
|
||||
var versionCmd = &cobra.Command{
|
||||
Use: "version",
|
||||
Short: "Print the version number of Hugo",
|
||||
Long: `All software has versions. This is Hugo's`,
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Hugo Static Site Generator v0.9 -- HEAD")
|
||||
},
|
||||
Use: "version",
|
||||
Short: "Print the version number of Hugo",
|
||||
Long: `All software has versions. This is Hugo's`,
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Hugo Static Site Generator v0.9 -- HEAD")
|
||||
},
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -453,8 +453,8 @@ You can also bind your flags with [viper](https://github.com/spf13/viper):
|
|||
var author string
|
||||
|
||||
func init() {
|
||||
RootCmd.PersistentFlags().StringVar(&author, "author", "YOUR NAME", "Author name for copyright attribution")
|
||||
viper.BindPFlag("author", RootCmd.PersistentFlags().Lookup("author"))
|
||||
RootCmd.PersistentFlags().StringVar(&author, "author", "YOUR NAME", "Author name for copyright attribution")
|
||||
viper.BindPFlag("author", RootCmd.PersistentFlags().Lookup("author"))
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -483,19 +483,19 @@ An example of setting the custom validator:
|
|||
|
||||
```go
|
||||
var cmd = &cobra.Command{
|
||||
Short: "hello",
|
||||
Args: func(cmd *cobra.Command, args []string) error {
|
||||
if len(args) < 1 {
|
||||
return errors.New("requires at least one arg")
|
||||
}
|
||||
if myapp.IsValidColor(args[0]) {
|
||||
return nil
|
||||
}
|
||||
return fmt.Errorf("invalid color specified: %s", args[0])
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Hello, World!")
|
||||
},
|
||||
Short: "hello",
|
||||
Args: func(cmd *cobra.Command, args []string) error {
|
||||
if len(args) < 1 {
|
||||
return errors.New("requires at least one arg")
|
||||
}
|
||||
if myapp.IsValidColor(args[0]) {
|
||||
return nil
|
||||
}
|
||||
return fmt.Errorf("invalid color specified: %s", args[0])
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Hello, World!")
|
||||
},
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -514,56 +514,56 @@ More documentation about flags is available at https://github.com/spf13/pflag
|
|||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"strings"
|
||||
"fmt"
|
||||
"strings"
|
||||
|
||||
"github.com/spf13/cobra"
|
||||
"github.com/spf13/cobra"
|
||||
)
|
||||
|
||||
func main() {
|
||||
var echoTimes int
|
||||
var echoTimes int
|
||||
|
||||
var cmdPrint = &cobra.Command{
|
||||
Use: "print [string to print]",
|
||||
Short: "Print anything to the screen",
|
||||
Long: `print is for printing anything back to the screen.
|
||||
var cmdPrint = &cobra.Command{
|
||||
Use: "print [string to print]",
|
||||
Short: "Print anything to the screen",
|
||||
Long: `print is for printing anything back to the screen.
|
||||
For many years people have printed back to the screen.`,
|
||||
Args: cobra.MinimumArgs(1),
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Print: " + strings.Join(args, " "))
|
||||
},
|
||||
}
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Print: " + strings.Join(args, " "))
|
||||
},
|
||||
}
|
||||
|
||||
var cmdEcho = &cobra.Command{
|
||||
Use: "echo [string to echo]",
|
||||
Short: "Echo anything to the screen",
|
||||
Long: `echo is for echoing anything back.
|
||||
var cmdEcho = &cobra.Command{
|
||||
Use: "echo [string to echo]",
|
||||
Short: "Echo anything to the screen",
|
||||
Long: `echo is for echoing anything back.
|
||||
Echo works a lot like print, except it has a child command.`,
|
||||
Args: cobra.MinimumArgs(1),
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Print: " + strings.Join(args, " "))
|
||||
},
|
||||
}
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Print: " + strings.Join(args, " "))
|
||||
},
|
||||
}
|
||||
|
||||
var cmdTimes = &cobra.Command{
|
||||
Use: "times [# times] [string to echo]",
|
||||
Short: "Echo anything to the screen more times",
|
||||
Long: `echo things multiple times back to the user by providing
|
||||
var cmdTimes = &cobra.Command{
|
||||
Use: "times [# times] [string to echo]",
|
||||
Short: "Echo anything to the screen more times",
|
||||
Long: `echo things multiple times back to the user by providing
|
||||
a count and a string.`,
|
||||
Args: cobra.MinimumArgs(1),
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
for i := 0; i < echoTimes; i++ {
|
||||
fmt.Println("Echo: " + strings.Join(args, " "))
|
||||
}
|
||||
},
|
||||
}
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
for i := 0; i < echoTimes; i++ {
|
||||
fmt.Println("Echo: " + strings.Join(args, " "))
|
||||
}
|
||||
},
|
||||
}
|
||||
|
||||
cmdTimes.Flags().IntVarP(&echoTimes, "times", "t", 1, "times to echo the input")
|
||||
cmdTimes.Flags().IntVarP(&echoTimes, "times", "t", 1, "times to echo the input")
|
||||
|
||||
var rootCmd = &cobra.Command{Use: "app"}
|
||||
rootCmd.AddCommand(cmdPrint, cmdEcho)
|
||||
cmdEcho.AddCommand(cmdTimes)
|
||||
rootCmd.Execute()
|
||||
var rootCmd = &cobra.Command{Use: "app"}
|
||||
rootCmd.AddCommand(cmdPrint, cmdEcho)
|
||||
cmdEcho.AddCommand(cmdTimes)
|
||||
rootCmd.Execute()
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -649,16 +649,16 @@ The default help command is
|
|||
|
||||
```go
|
||||
func (c *Command) initHelp() {
|
||||
if c.helpCommand == nil {
|
||||
c.helpCommand = &Command{
|
||||
Use: "help [command]",
|
||||
Short: "Help about any command",
|
||||
Long: `Help provides help for any command in the application.
|
||||
if c.helpCommand == nil {
|
||||
c.helpCommand = &Command{
|
||||
Use: "help [command]",
|
||||
Short: "Help about any command",
|
||||
Long: `Help provides help for any command in the application.
|
||||
Simply type ` + c.Name() + ` help [path to command] for full details.`,
|
||||
Run: c.HelpFunc(),
|
||||
}
|
||||
}
|
||||
c.AddCommand(c.helpCommand)
|
||||
Run: c.HelpFunc(),
|
||||
}
|
||||
}
|
||||
c.AddCommand(c.helpCommand)
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -732,8 +732,8 @@ The default usage function is:
|
|||
|
||||
```go
|
||||
return func(c *Command) error {
|
||||
err := tmpl(c.Out(), c.UsageTemplate(), c)
|
||||
return err
|
||||
err := tmpl(c.Out(), c.UsageTemplate(), c)
|
||||
return err
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -761,57 +761,57 @@ An example of two commands which use all of these features is below. When the s
|
|||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"fmt"
|
||||
|
||||
"github.com/spf13/cobra"
|
||||
"github.com/spf13/cobra"
|
||||
)
|
||||
|
||||
func main() {
|
||||
|
||||
var rootCmd = &cobra.Command{
|
||||
Use: "root [sub]",
|
||||
Short: "My root command",
|
||||
PersistentPreRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PersistentPreRun with args: %v\n", args)
|
||||
},
|
||||
PreRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PreRun with args: %v\n", args)
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd Run with args: %v\n", args)
|
||||
},
|
||||
PostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PostRun with args: %v\n", args)
|
||||
},
|
||||
PersistentPostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PersistentPostRun with args: %v\n", args)
|
||||
},
|
||||
}
|
||||
var rootCmd = &cobra.Command{
|
||||
Use: "root [sub]",
|
||||
Short: "My root command",
|
||||
PersistentPreRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PersistentPreRun with args: %v\n", args)
|
||||
},
|
||||
PreRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PreRun with args: %v\n", args)
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd Run with args: %v\n", args)
|
||||
},
|
||||
PostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PostRun with args: %v\n", args)
|
||||
},
|
||||
PersistentPostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PersistentPostRun with args: %v\n", args)
|
||||
},
|
||||
}
|
||||
|
||||
var subCmd = &cobra.Command{
|
||||
Use: "sub [no options!]",
|
||||
Short: "My subcommand",
|
||||
PreRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd PreRun with args: %v\n", args)
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd Run with args: %v\n", args)
|
||||
},
|
||||
PostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd PostRun with args: %v\n", args)
|
||||
},
|
||||
PersistentPostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd PersistentPostRun with args: %v\n", args)
|
||||
},
|
||||
}
|
||||
var subCmd = &cobra.Command{
|
||||
Use: "sub [no options!]",
|
||||
Short: "My subcommand",
|
||||
PreRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd PreRun with args: %v\n", args)
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd Run with args: %v\n", args)
|
||||
},
|
||||
PostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd PostRun with args: %v\n", args)
|
||||
},
|
||||
PersistentPostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd PersistentPostRun with args: %v\n", args)
|
||||
},
|
||||
}
|
||||
|
||||
rootCmd.AddCommand(subCmd)
|
||||
rootCmd.AddCommand(subCmd)
|
||||
|
||||
rootCmd.SetArgs([]string{""})
|
||||
rootCmd.Execute()
|
||||
fmt.Println()
|
||||
rootCmd.SetArgs([]string{"sub", "arg1", "arg2"})
|
||||
rootCmd.Execute()
|
||||
rootCmd.SetArgs([]string{""})
|
||||
rootCmd.Execute()
|
||||
fmt.Println()
|
||||
rootCmd.SetArgs([]string{"sub", "arg1", "arg2"})
|
||||
rootCmd.Execute()
|
||||
}
|
||||
```
|
||||
|
||||
|
|
@ -837,28 +837,28 @@ command.
|
|||
package main
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"log"
|
||||
"errors"
|
||||
"log"
|
||||
|
||||
"github.com/spf13/cobra"
|
||||
"github.com/spf13/cobra"
|
||||
)
|
||||
|
||||
func main() {
|
||||
var rootCmd = &cobra.Command{
|
||||
Use: "hugo",
|
||||
Short: "Hugo is a very fast static site generator",
|
||||
Long: `A Fast and Flexible Static Site Generator built with
|
||||
var rootCmd = &cobra.Command{
|
||||
Use: "hugo",
|
||||
Short: "Hugo is a very fast static site generator",
|
||||
Long: `A Fast and Flexible Static Site Generator built with
|
||||
love by spf13 and friends in Go.
|
||||
Complete documentation is available at http://hugo.spf13.com`,
|
||||
RunE: func(cmd *cobra.Command, args []string) error {
|
||||
// Do Stuff Here
|
||||
return errors.New("some random error")
|
||||
},
|
||||
}
|
||||
RunE: func(cmd *cobra.Command, args []string) error {
|
||||
// Do Stuff Here
|
||||
return errors.New("some random error")
|
||||
},
|
||||
}
|
||||
|
||||
if err := rootCmd.Execute(); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
if err := rootCmd.Execute(); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue