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Make rootCmd private

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Update Cobra generator to make rootCmd private rather than
exporting it. Also update examples in README to use the exported
Execute() command rather than referencing unexported rootCmd.

Fixes #556
This commit is contained in:
Nick Miyake
2017-11-22 16:13:03 -08:00
committed by Albert Nigmatzianov
parent fb02817f3c
commit 1be1d2841c
5 changed files with 31 additions and 37 deletions
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40
README.md
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@ -158,10 +158,7 @@ import (
)
func main() {
if err := cmd.RootCmd.Execute(); err != nil {
fmt.Println(err)
os.Exit(1)
}
cmd.Execute()
}
```
@ -174,7 +171,7 @@ commands you want. It's the easiest way to incorporate Cobra into your applicati
## Using the Cobra Library
To manually implement Cobra you need to create a bare main.go file and a RootCmd file.
To manually implement Cobra you need to create a bare main.go file and a rootCmd file.
You will optionally provide additional commands as you see fit.
### Create rootCmd
@ -184,7 +181,7 @@ Cobra doesn't require any special constructors. Simply create your commands.
Ideally you place this in app/cmd/root.go:
```go
var RootCmd = &cobra.Command{
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
@ -212,14 +209,14 @@ import (
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"))
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")
}
@ -267,10 +264,7 @@ import (
)
func main() {
if err := cmd.RootCmd.Execute(); err != nil {
fmt.Println(err)
os.Exit(1)
}
cmd.Execute()
}
```
@ -292,7 +286,7 @@ import (
)
func init() {
RootCmd.AddCommand(versionCmd)
rootCmd.AddCommand(versionCmd)
}
var versionCmd = &cobra.Command{
@ -329,7 +323,7 @@ command it's assigned to as well as every command under that command. For
global flags, assign a flag as a persistent flag on the root.
```go
RootCmd.PersistentFlags().BoolVarP(&Verbose, "verbose", "v", false, "verbose output")
rootCmd.PersistentFlags().BoolVarP(&Verbose, "verbose", "v", false, "verbose output")
```
### Local Flags
@ -337,7 +331,7 @@ RootCmd.PersistentFlags().BoolVarP(&Verbose, "verbose", "v", false, "verbose out
A flag can also be assigned locally which will only apply to that specific command.
```go
RootCmd.Flags().StringVarP(&Source, "source", "s", "", "Source directory to read from")
rootCmd.Flags().StringVarP(&Source, "source", "s", "", "Source directory to read from")
```
### Local Flag on Parent Commands
@ -360,8 +354,8 @@ 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"))
}
```