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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"
"strconv"
"strings"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/vespa-engine/vespa/client/go/util"
"github.com/vespa-engine/vespa/client/go/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",
DisableAutoGenTag: true,
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",
DisableAutoGenTag: true,
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),
DisableAutoGenTag: true,
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 {
home := os.Getenv("VESPA_CLI_HOME")
if home == "" {
var err error
home, err = os.UserHomeDir()
if err != nil {
fatalErr(err, "Could not determine configuration directory")
return ""
}
home = filepath.Join(home, ".vespa")
}
configDir := filepath.Join(home, application)
if err := os.MkdirAll(configDir, 0755); err != nil {
fatalErr(err, "Could not create config directory")
return ""
}
return configDir
}
func bindFlagToConfig(option string, command *cobra.Command) {
flagToConfigBindings[option] = command
}
func readConfig() {
configDir := configDir("")
if configDir == "" {
return
}
viper.SetConfigName(configName)
viper.SetConfigType(configType)
viper.AddConfigPath(configDir)
viper.AutomaticEnv()
for option, command := range flagToConfigBindings {
viper.BindPFlag(option, command.PersistentFlags().Lookup(option))
}
err := viper.ReadInConfig()
if _, ok := err.(viper.ConfigFileNotFoundError); ok {
return // Fine
}
if err != nil {
fatalErr(err, "Could not read configuration")
}
}
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
case waitFlag:
if _, err := strconv.ParseUint(value, 10, 32); err != nil {
return fmt.Errorf("%s option must be an integer >= 0, got %q", option, value)
}
viper.Set(option, value)
return nil
}
return fmt.Errorf("invalid option or value: %q: %q", option, value)
}
func writeConfig() {
configDir := configDir("")
if configDir == "" {
return
}
if !util.PathExists(configDir) {
if err := os.MkdirAll(configDir, 0700); err != nil {
fatalErr(err, "Could not create ", color.Cyan(configDir))
return
}
}
configFile := filepath.Join(configDir, configName+"."+configType)
if !util.PathExists(configFile) {
if _, err := os.Create(configFile); err != nil {
fatalErr(err, "Could not create ", color.Cyan(configFile))
return
}
}
if err := viper.WriteConfig(); err != nil {
fatalErr(err, "Could not write config")
return
}
}
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