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