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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
// vespa config command
// author: bratseth
package cmd
import (
"fmt"
"log"
"os"
"path/filepath"
"strings"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/vespa-engine/vespa/util"
"github.com/vespa-engine/vespa/vespa"
)
const (
configName = "config"
configType = "yaml"
)
var flagToConfigBindings map[string][]*cobra.Command = make(map[string][]*cobra.Command)
func init() {
rootCmd.AddCommand(configCmd)
configCmd.AddCommand(setConfigCmd)
configCmd.AddCommand(getConfigCmd)
}
var configCmd = &cobra.Command{
Use: "config",
Short: "Configure default values for flags",
Run: func(cmd *cobra.Command, args []string) {
// Root command does nothing
cmd.Help()
os.Exit(1)
},
}
var setConfigCmd = &cobra.Command{
Use: "set option value",
Short: "Set a configuration option.",
Example: "$ vespa config set target cloud",
Args: cobra.ExactArgs(2),
Run: func(cmd *cobra.Command, args []string) {
if err := setOption(args[0], args[1]); err != nil {
log.Print(err)
} else {
writeConfig()
}
},
}
var getConfigCmd = &cobra.Command{
Use: "get option",
Short: "Get a configuration option",
Example: "$ vespa config get target",
Args: cobra.MaximumNArgs(1),
Run: func(cmd *cobra.Command, args []string) {
if len(args) == 0 { // Print all values
printOption(targetFlag)
printOption(applicationFlag)
} else {
printOption(args[0])
}
},
}
func printOption(option string) {
value, err := getOption(option)
if err != nil {
value = color.Faint("<unset>").String()
} else {
value = color.Cyan(value).String()
}
log.Printf("%s = %s", option, value)
}
func configDir(application string) (string, error) {
home := os.Getenv("VESPA_CLI_HOME")
if home == "" {
var err error
home, err = os.UserHomeDir()
if err != nil {
return "", err
}
}
return filepath.Join(home, ".vespa", application), nil
}
func bindFlagToConfig(option string, command *cobra.Command) {
flagToConfigBindings[option] = append(flagToConfigBindings[option], command)
}
func readConfig() {
configDir, err := configDir("")
if err != nil {
log.Print(color.Red("Error:"), "Could not determine configuration directory")
log.Print(color.Brown(err))
return
}
viper.SetConfigName(configName)
viper.SetConfigType(configType)
viper.AddConfigPath(configDir)
viper.AutomaticEnv()
for option, commands := range flagToConfigBindings {
for _, command := range commands {
viper.BindPFlag(option, command.PersistentFlags().Lookup(option))
}
}
err = viper.ReadInConfig()
if _, ok := err.(viper.ConfigFileNotFoundError); ok {
return // Fine
}
if err != nil {
log.Print(color.Red("Error:"), "Could read configuration")
log.Print(color.Brown(err))
}
}
func getOption(option string) (string, error) {
value := viper.GetString(option)
if value == "" {
return "", fmt.Errorf("no such option: %q", option)
}
return value, nil
}
func setOption(option, value string) error {
switch option {
case targetFlag:
switch value {
case "local", "cloud":
viper.Set(option, value)
return nil
}
if strings.HasPrefix(value, "http://") || strings.HasPrefix(value, "https://") {
viper.Set(option, value)
return nil
}
case applicationFlag:
if _, err := vespa.ApplicationFromString(value); err != nil {
return err
}
viper.Set(option, value)
return nil
}
return fmt.Errorf("invalid option or value: %q: %q", option, value)
}
func writeConfig() {
configDir, err := configDir("")
if err != nil {
log.Fatalf("Could not decide config directory: %s", color.Red(err))
}
if !util.PathExists(configDir) {
if err := os.MkdirAll(configDir, 0700); err != nil {
log.Fatalf("Could not create %s: %s", color.Cyan(configDir), color.Red(err))
}
}
configFile := filepath.Join(configDir, configName+"."+configType)
if !util.PathExists(configFile) {
if _, err := os.Create(configFile); err != nil {
log.Fatalf("Could not create %s: %s", color.Cyan(configFile), color.Red(err))
}
}
if err := viper.WriteConfig(); err != nil {
log.Printf("Could not write config: %s", color.Red(err))
}
}
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