autorestic/internal/config.go

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package internal
import (
"fmt"
"log"
"path"
"strings"
"sync"
"github.com/mitchellh/go-homedir"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
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const VERSION = "1.0.0"
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type Config struct {
Locations map[string]Location `mapstructure:"locations"`
Backends map[string]Backend `mapstructure:"backends"`
}
var once sync.Once
var config *Config
func GetConfig() *Config {
if config == nil {
once.Do(func() {
config = &Config{}
if err := viper.UnmarshalExact(config); err != nil {
log.Fatal("Nope ", err)
}
})
}
return config
}
func GetPathRelativeToConfig(p string) string {
if path.IsAbs(p) {
return p
} else if strings.HasPrefix(p, "~") {
home, err := homedir.Dir()
if err != nil {
panic(err)
}
return path.Join(home, strings.TrimPrefix(p, "~"))
} else {
return path.Join(path.Dir(viper.ConfigFileUsed()), p)
}
}
func (c Config) CheckConfig() error {
for name, backend := range c.Backends {
if err := backend.validate(); err != nil {
return fmt.Errorf("backend \"%s\": %s", name, err)
}
}
for name, location := range c.Locations {
if err := location.validate(c); err != nil {
return fmt.Errorf("location \"%s\": %s", name, err)
}
}
return nil
}
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func GetAllOrSelected(cmd *cobra.Command, backends bool) ([]string, error) {
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var list []string
if backends {
for key := range config.Backends {
list = append(list, key)
}
} else {
for key := range config.Locations {
list = append(list, key)
}
}
all, _ := cmd.Flags().GetBool("all")
if all {
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return list, nil
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} else {
var selected []string
if backends {
tmp, _ := cmd.Flags().GetStringSlice("backend")
selected = tmp
} else {
tmp, _ := cmd.Flags().GetStringSlice("location")
selected = tmp
}
for _, s := range selected {
found := false
for _, l := range list {
if l == s {
found = true
break
}
}
if !found {
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if backends {
return nil, fmt.Errorf("invalid backend \"%s\"", s)
} else {
return nil, fmt.Errorf("invalid location \"%s\"", s)
}
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}
}
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return selected, nil
}
}
func AddFlagsToCommand(cmd *cobra.Command, backend bool) {
cmd.PersistentFlags().BoolP("all", "a", false, "Backup all locations")
if backend {
cmd.PersistentFlags().StringSliceP("backend", "b", []string{}, "backends")
} else {
cmd.PersistentFlags().StringSliceP("location", "l", []string{}, "Locations")
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}
}