145 lines
3.3 KiB
Go
145 lines
3.3 KiB
Go
package internal
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import (
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"crypto/rand"
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"encoding/base64"
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"fmt"
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"os"
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"strings"
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"github.com/cupcakearmy/autorestic/internal/colors"
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"github.com/spf13/viper"
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)
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type Backend struct {
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name string
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Type string `mapstructure:"type,omitempty"`
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Path string `mapstructure:"path,omitempty"`
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Key string `mapstructure:"key,omitempty"`
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Env map[string]string `mapstructure:"env,omitempty"`
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}
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func GetBackend(name string) (Backend, bool) {
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b, ok := GetConfig().Backends[name]
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b.name = name
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return b, ok
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}
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func (b Backend) generateRepo() (string, error) {
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switch b.Type {
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case "local":
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return GetPathRelativeToConfig(b.Path)
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case "b2", "azure", "gs", "s3", "sftp", "rest":
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return fmt.Sprintf("%s:%s", b.Type, b.Path), nil
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default:
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return "", fmt.Errorf("backend type \"%s\" is invalid", b.Type)
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}
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}
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func (b Backend) getEnv() (map[string]string, error) {
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env := make(map[string]string)
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env["RESTIC_PASSWORD"] = b.Key
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repo, err := b.generateRepo()
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env["RESTIC_REPOSITORY"] = repo
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return env, err
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}
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func generateRandomKey() string {
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b := make([]byte, 64)
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rand.Read(b)
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key := base64.StdEncoding.EncodeToString(b)
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key = strings.ReplaceAll(key, "=", "")
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key = strings.ReplaceAll(key, "+", "")
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key = strings.ReplaceAll(key, "/", "")
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return key
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}
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func (b Backend) validate() error {
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if b.Type == "" {
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return fmt.Errorf(`Backend "%s" has no "type"`, b.name)
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}
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if b.Path == "" {
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return fmt.Errorf(`Backend "%s" has no "path"`, b.name)
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}
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if b.Key == "" {
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key := generateRandomKey()
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b.Key = key
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c := GetConfig()
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tmp := c.Backends[b.name]
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tmp.Key = key
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tmp.name = ""
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c.Backends[b.name] = tmp
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file := viper.ConfigFileUsed()
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if err := CopyFile(file, file+".old"); err != nil {
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return err
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}
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colors.Secondary.Println("Saved a backup copy of your file next the the original.")
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viper.Set("backends", c.Backends)
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viper.WriteConfig()
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}
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env, err := b.getEnv()
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if err != nil {
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return err
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}
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options := ExecuteOptions{Envs: env}
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// Check if already initialized
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_, err = ExecuteResticCommand(options, "snapshots")
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if err == nil {
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return nil
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} else {
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// If not initialize
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out, err := ExecuteResticCommand(options, "init")
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colors.Faint.Println(out)
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return err
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}
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}
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func (b Backend) Exec(args []string) error {
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env, err := b.getEnv()
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if err != nil {
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return err
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}
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options := ExecuteOptions{Envs: env}
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out, err := ExecuteResticCommand(options, args...)
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if VERBOSE {
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colors.Faint.Println(out)
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}
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return err
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}
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func (b Backend) ExecDocker(l Location, args []string) error {
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env, err := b.getEnv()
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if err != nil {
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return err
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}
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volume := l.getVolumeName()
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path, _ := l.getPath()
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options := ExecuteOptions{
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Command: "docker",
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Envs: env,
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}
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docker := []string{
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"run", "--rm",
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"--entrypoint", "ash",
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"--workdir", path,
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"--volume", volume + ":" + path,
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}
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if hostname, err := os.Hostname(); err == nil {
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docker = append(docker, "--hostname", hostname)
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}
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if b.Type == "local" {
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actual := env["RESTIC_REPOSITORY"]
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docker = append(docker, "--volume", actual+":"+"/repo")
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env["RESTIC_REPOSITORY"] = "/repo"
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}
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for key, value := range env {
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docker = append(docker, "--env", key+"="+value)
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}
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docker = append(docker, "restic/restic", "-c", "restic "+strings.Join(args, " "))
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out, err := ExecuteCommand(options, docker...)
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if VERBOSE {
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colors.Faint.Println(out)
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}
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return err
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}
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