Refactor commands

cmd/restic/cmd_backup.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 	"os"
 	"strings"
@@ -12,8 +11,16 @@ import (
 	"golang.org/x/crypto/ssh/terminal"
 )
 
+type CmdBackup struct{}
+
 func init() {
-	commands["backup"] = commandBackup
+	_, err := parser.AddCommand("backup",
+		"save file/directory",
+		"The backup command creates a snapshot of a file or directory",
+		&CmdBackup{})
+	if err != nil {
+		panic(err)
+	}
 }
 
 func format_bytes(c uint64) string {
@@ -56,13 +63,21 @@ func print_tree2(indent int, t *restic.Tree) {
 	}
 }
 
-func commandBackup(be backend.Server, key *restic.Key, args []string) error {
-	if len(args) < 1 || len(args) > 2 {
-		return errors.New("usage: backup [dir|file] [snapshot-id]")
+func (cmd CmdBackup) Usage() string {
+	return "DIR/FILE [snapshot-ID]"
+}
+
+func (cmd CmdBackup) Execute(args []string) error {
+	if len(args) == 0 || len(args) > 2 {
+		return fmt.Errorf("wrong number of parameters, Usage: %s", cmd.Usage())
+	}
+
+	be, key, err := OpenRepo()
+	if err != nil {
+		return err
 	}
 
 	var parentSnapshotID backend.ID
-	var err error
 
 	target := args[0]
 	if len(args) > 1 {

cmd/restic/cmd_cat.go

@@ -10,13 +10,30 @@ import (
 	"github.com/restic/restic/backend"
 )
 
+type CmdCat struct{}
+
 func init() {
-	commands["cat"] = commandCat
+	_, err := parser.AddCommand("cat",
+		"dump something",
+		"The cat command dumps data structures or data from a repository",
+		&CmdCat{})
+	if err != nil {
+		panic(err)
+	}
 }
 
-func commandCat(be backend.Server, key *restic.Key, args []string) error {
+func (cmd CmdCat) Usage() string {
+	return "[blob|tree|snapshot|key|lock] ID"
+}
+
+func (cmd CmdCat) Execute(args []string) error {
 	if len(args) != 2 {
-		return errors.New("usage: cat [blob|tree|snapshot|key|lock] ID")
+		return fmt.Errorf("type or ID not specified, Usage: %s", cmd.Usage())
+	}
+
+	be, key, err := OpenRepo()
+	if err != nil {
+		return err
 	}
 
 	tpe := args[0]

cmd/restic/cmd_find.go

@@ -1,16 +1,18 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 	"path/filepath"
+	"time"
 
 	"github.com/restic/restic"
 	"github.com/restic/restic/backend"
 )
 
-func init() {
-	commands["find"] = commandFind
+type findQuery struct {
+	name       string
+	minModTime time.Time
+	maxModTime time.Time
 }
 
 type findResult struct {
@@ -18,6 +20,21 @@ type findResult struct {
 	path string
 }
 
+type CmdFind struct {
+	Oldest time.Time `short:"o" long:"oldest" description:"Oldest modification date/time"`
+	Newest time.Time `short:"n" long:"newest" description:"Newest modification date/time"`
+}
+
+func init() {
+	_, err := parser.AddCommand("find",
+		"find a file/directory",
+		"The find command searches for files or directories in snapshots",
+		&CmdFind{})
+	if err != nil {
+		panic(err)
+	}
+}
+
 func findInTree(ch *restic.ContentHandler, id backend.ID, path, pattern string) ([]findResult, error) {
 	debug("checking tree %v\n", id)
 
@@ -83,9 +100,18 @@ func findInSnapshot(be backend.Server, key *restic.Key, id backend.ID, pattern s
 	return nil
 }
 
-func commandFind(be backend.Server, key *restic.Key, args []string) error {
+func (cmd CmdFind) Usage() string {
+	return "[find-OPTIONS] PATTERN [snapshot-ID]"
+}
+
+func (cmd CmdFind) Execute(args []string) error {
 	if len(args) == 0 {
-		return errors.New("usage: find PATTERN [snapshot-id]")
+		return fmt.Errorf("no pattern given, Usage: %s", cmd.Usage())
+	}
+
+	be, key, err := OpenRepo()
+	if err != nil {
+		return err
 	}
 
 	pattern := args[0]

cmd/restic/cmd_fsck.go

@@ -1,15 +1,22 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 
 	"github.com/restic/restic"
 	"github.com/restic/restic/backend"
 )
 
+type CmdFsck struct{}
+
 func init() {
-	commands["fsck"] = commandFsck
+	_, err := parser.AddCommand("fsck",
+		"check the repository",
+		"The fsck command check the integrity and consistency of the repository",
+		&CmdFsck{})
+	if err != nil {
+		panic(err)
+	}
 }
 
 func fsckFile(ch *restic.ContentHandler, IDs []backend.ID) error {
@@ -92,9 +99,18 @@ func fsck_snapshot(be backend.Server, key *restic.Key, id backend.ID) error {
 	return fsckTree(ch, sn.Tree)
 }
 
-func commandFsck(be backend.Server, key *restic.Key, args []string) error {
+func (cmd CmdFsck) Usage() string {
+	return "fsck [all|snapshot-ID]"
+}
+
+func (cmd CmdFsck) Execute(args []string) error {
 	if len(args) == 0 {
-		return errors.New("usage: fsck [all|snapshot-id]")
+		return fmt.Errorf("type or ID not specified, Usage: %s", cmd.Usage())
+	}
+
+	be, key, err := OpenRepo()
+	if err != nil {
+		return err
 	}
 
 	if len(args) == 1 && args[0] != "all" {

cmd/restic/cmd_key.go

@@ -10,8 +10,16 @@ import (
 	"github.com/restic/restic/backend"
 )
 
+type CmdKey struct{}
+
 func init() {
-	commands["key"] = commandKey
+	_, err := parser.AddCommand("key",
+		"manage keys",
+		"The key command manages keys (passwords) of a repository",
+		&CmdKey{})
+	if err != nil {
+		panic(err)
+	}
 }
 
 func list_keys(be backend.Server, key *restic.Key) error {
@@ -103,9 +111,18 @@ func change_password(be backend.Server, key *restic.Key) error {
 	return nil
 }
 
-func commandKey(be backend.Server, key *restic.Key, args []string) error {
+func (cmd CmdKey) Usage() string {
+	return "[list|add|rm|change] [ID]"
+}
+
+func (cmd CmdKey) Execute(args []string) error {
 	if len(args) < 1 || (args[0] == "rm" && len(args) != 2) {
-		return errors.New("usage: key [list|add|rm|change] [ID]")
+		return fmt.Errorf("wrong number of arguments, Usage: %s", cmd.Usage())
+	}
+
+	be, key, err := OpenRepo()
+	if err != nil {
+		return err
 	}
 
 	switch args[0] {

cmd/restic/cmd_list.go

@@ -3,18 +3,33 @@ package main
 import (
 	"errors"
 	"fmt"
-
-	"github.com/restic/restic"
 	"github.com/restic/restic/backend"
 )
 
+type CmdList struct{}
+
 func init() {
-	commands["list"] = commandList
+	_, err := parser.AddCommand("list",
+		"lists data",
+		"The list command lists structures or data of a repository",
+		&CmdList{})
+	if err != nil {
+		panic(err)
+	}
 }
 
-func commandList(be backend.Server, key *restic.Key, args []string) error {
+func (cmd CmdList) Usage() string {
+	return "[data|trees|snapshots|keys|locks]"
+}
+
+func (cmd CmdList) Execute(args []string) error {
 	if len(args) != 1 {
-		return errors.New("usage: list [data|trees|snapshots|keys|locks]")
+		return fmt.Errorf("type not specified, Usage: %s", cmd.Usage())
+	}
+
+	be, key, err := OpenRepo()
+	if err != nil {
+		return err
 	}
 
 	var (

cmd/restic/cmd_ls.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -10,8 +9,16 @@ import (
 	"github.com/restic/restic/backend"
 )
 
+type CmdLs struct{}
+
 func init() {
-	commands["ls"] = commandLs
+	_, err := parser.AddCommand("ls",
+		"list files",
+		"The ls command lists all files and directories in a snapshot",
+		&CmdLs{})
+	if err != nil {
+		panic(err)
+	}
 }
 
 func print_node(prefix string, n *restic.Node) string {
@@ -52,9 +59,18 @@ func print_tree(prefix string, ch *restic.ContentHandler, id backend.ID) error {
 	return nil
 }
 
-func commandLs(be backend.Server, key *restic.Key, args []string) error {
+func (cmd CmdLs) Usage() string {
+	return "ls snapshot-ID [DIR]"
+}
+
+func (cmd CmdLs) Execute(be backend.Server, key *restic.Key, args []string) error {
 	if len(args) < 1 || len(args) > 2 {
-		return errors.New("usage: ls SNAPSHOT_ID [dir]")
+		return fmt.Errorf("wrong number of arguments, Usage: %s", cmd.Usage())
+	}
+
+	be, key, err := OpenRepo()
+	if err != nil {
+		return err
 	}
 
 	id, err := backend.FindSnapshot(be, args[0])

cmd/restic/cmd_restore.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 	"os"
 
@@ -9,13 +8,30 @@ import (
 	"github.com/restic/restic/backend"
 )
 
+type CmdRestore struct{}
+
 func init() {
-	commands["restore"] = commandRestore
+	_, err := parser.AddCommand("restore",
+		"restore a snapshot",
+		"The restore command restores a snapshot to a directory",
+		&CmdRestore{})
+	if err != nil {
+		panic(err)
+	}
 }
 
-func commandRestore(be backend.Server, key *restic.Key, args []string) error {
+func (cmd CmdRestore) Usage() string {
+	return "snapshot-ID TARGETDIR"
+}
+
+func (cmd CmdRestore) Execute(args []string) error {
 	if len(args) != 2 {
-		return errors.New("usage: restore ID dir")
+		return fmt.Errorf("wrong number of arguments, Usage: %s", cmd.Usage())
+	}
+
+	be, key, err := OpenRepo()
+	if err != nil {
+		return err
 	}
 
 	id, err := backend.FindSnapshot(be, args[0])

cmd/restic/cmd_snapshots.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -72,13 +71,30 @@ func reltime(t time.Time) string {
 	}
 }
 
+type CmdSnapshots struct{}
+
 func init() {
-	commands["snapshots"] = commandSnapshots
+	_, err := parser.AddCommand("snapshots",
+		"show snapshots",
+		"The snapshots command lists all snapshots stored in a repository",
+		&CmdSnapshots{})
+	if err != nil {
+		panic(err)
+	}
 }
 
-func commandSnapshots(be backend.Server, key *restic.Key, args []string) error {
+func (cmd CmdSnapshots) Usage() string {
+	return ""
+}
+
+func (cmd CmdSnapshots) Execute(args []string) error {
 	if len(args) != 0 {
-		return errors.New("usage: snapshots")
+		return fmt.Errorf("wrong number of arguments, usage: %s", cmd.Usage())
+	}
+
+	be, key, err := OpenRepo()
+	if err != nil {
+		return err
 	}
 
 	ch, err := restic.NewContentHandler(be, key)

cmd/restic/main.go

@@ -1,13 +1,11 @@
 package main
 
 import (
+	"errors"
 	"fmt"
-	"log"
 	"net/url"
 	"os"
 	"runtime"
-	"sort"
-	"strings"
 
 	"golang.org/x/crypto/ssh/terminal"
 
@@ -22,6 +20,8 @@ var opts struct {
 	Repo string `short:"r" long:"repo"    description:"Repository directory to backup to/restore from"`
 }
 
+var parser = flags.NewParser(&opts, flags.Default)
+
 func errx(code int, format string, data ...interface{}) {
 	if len(format) > 0 && format[len(format)-1] != '\n' {
 		format += "\n"
@@ -30,10 +30,6 @@ func errx(code int, format string, data ...interface{}) {
 	os.Exit(code)
 }
 
-type commandFunc func(backend.Server, *restic.Key, []string) error
-
-var commands = make(map[string]commandFunc)
-
 func readPassword(env string, prompt string) string {
 
 	if env != "" {
@@ -54,7 +50,13 @@ func readPassword(env string, prompt string) string {
 	return string(pw)
 }
 
-func commandInit(repo string) error {
+type CmdInit struct{}
+
+func (cmd CmdInit) Execute(args []string) error {
+	if opts.Repo == "" {
+		return errors.New("Please specify repository location (-r)")
+	}
+
 	pw := readPassword("RESTIC_PASSWORD", "enter password for new backend: ")
 	pw2 := readPassword("RESTIC_PASSWORD", "enter password again: ")
 
@@ -62,15 +64,15 @@ func commandInit(repo string) error {
 		errx(1, "passwords do not match")
 	}
 
-	be, err := create(repo)
+	be, err := create(opts.Repo)
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "creating backend at %s failed: %v\n", repo, err)
+		fmt.Fprintf(os.Stderr, "creating backend at %s failed: %v\n", opts.Repo, err)
 		os.Exit(1)
 	}
 
 	_, err = restic.CreateKey(be, pw)
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "creating key in backend at %s failed: %v\n", repo, err)
+		fmt.Fprintf(os.Stderr, "creating key in backend at %s failed: %v\n", opts.Repo, err)
 		os.Exit(1)
 	}
 
@@ -125,73 +127,99 @@ func create(u string) (backend.Server, error) {
 	return backend.CreateSFTP(url.Path[1:], "ssh", args...)
 }
 
+func OpenRepo() (backend.Server, *restic.Key, error) {
+	be, err := open(opts.Repo)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	key, err := restic.SearchKey(be, readPassword("RESTIC_PASSWORD", "Enter Password for Repository: "))
+	if err != nil {
+		return nil, nil, fmt.Errorf("unable to open repo: %v", err)
+	}
+
+	return be, key, nil
+}
+
 func init() {
 	// set GOMAXPROCS to number of CPUs
 	runtime.GOMAXPROCS(runtime.NumCPU())
+
+	_, err := parser.AddCommand("init",
+		"create repository",
+		"The init command creates a new repository",
+		&CmdInit{})
+	if err != nil {
+		panic(err)
+	}
 }
 
 func main() {
 	// defer profile.Start(profile.MemProfileRate(100000), profile.ProfilePath(".")).Stop()
-
-	log.SetOutput(os.Stdout)
-
 	opts.Repo = os.Getenv("RESTIC_REPOSITORY")
 
-	args, err := flags.Parse(&opts)
+	_, err := parser.Parse()
 	if e, ok := err.(*flags.Error); ok && e.Type == flags.ErrHelp {
 		os.Exit(0)
 	}
 
-	if opts.Repo == "" {
-		fmt.Fprintf(os.Stderr, "no repository specified, use -r or RESTIC_REPOSITORY variable\n")
+	if err != nil {
 		os.Exit(1)
 	}
 
-	if len(args) == 0 {
-		cmds := []string{"init"}
-		for k := range commands {
-			cmds = append(cmds, k)
-		}
-		sort.Strings(cmds)
-		fmt.Printf("nothing to do, available commands: [%v]\n", strings.Join(cmds, "|"))
-		os.Exit(0)
-	}
+	// fmt.Printf("parser: %#v\n", parser)
+	// fmt.Printf("%#v\n", parser.Active.Name)
 
-	cmd := args[0]
+	// if opts.Repo == "" {
+	// 	fmt.Fprintf(os.Stderr, "no repository specified, use -r or RESTIC_REPOSITORY variable\n")
+	// 	os.Exit(1)
+	// }
 
-	switch cmd {
-	case "init":
-		err = commandInit(opts.Repo)
-		if err != nil {
-			errx(1, "error executing command %q: %v", cmd, err)
-		}
-		return
+	// if len(args) == 0 {
+	// 	cmds := []string{"init"}
+	// 	for k := range commands {
+	// 		cmds = append(cmds, k)
+	// 	}
+	// 	sort.Strings(cmds)
+	// 	fmt.Printf("nothing to do, available commands: [%v]\n", strings.Join(cmds, "|"))
+	// 	os.Exit(0)
+	// }
 
-	case "version":
-		fmt.Printf("%v\n", version)
-		return
-	}
+	// cmd := args[0]
 
-	f, ok := commands[cmd]
-	if !ok {
-		errx(1, "unknown command: %q\n", cmd)
-	}
+	// switch cmd {
+	// case "init":
+	// 	err = commandInit(opts.Repo)
+	// 	if err != nil {
+	// 		errx(1, "error executing command %q: %v", cmd, err)
+	// 	}
+	// 	return
 
-	// read_password("enter password: ")
-	repo, err := open(opts.Repo)
-	if err != nil {
-		errx(1, "unable to open repo: %v", err)
-	}
+	// case "version":
+	// 	fmt.Printf("%v\n", version)
+	// 	return
+	// }
 
-	key, err := restic.SearchKey(repo, readPassword("RESTIC_PASSWORD", "Enter Password for Repository: "))
-	if err != nil {
-		errx(2, "unable to open repo: %v", err)
-	}
+	// f, ok := commands[cmd]
+	// if !ok {
+	// 	errx(1, "unknown command: %q\n", cmd)
+	// }
 
-	err = f(repo, key, args[1:])
-	if err != nil {
-		errx(1, "error executing command %q: %v", cmd, err)
-	}
+	// // read_password("enter password: ")
+	// repo, err := open(opts.Repo)
+	// if err != nil {
+	// 	errx(1, "unable to open repo: %v", err)
+	// }
 
-	restic.PoolAlloc()
+	// key, err := restic.SearchKey(repo, readPassword("RESTIC_PASSWORD", "Enter Password for Repository: "))
+	// if err != nil {
+	// 	errx(2, "unable to open repo: %v", err)
+	// }
+
+	// err = f(repo, key, args[1:])
+	// if err != nil {
+	// 	errx(1, "error executing command %q: %v", cmd, err)
+	// }
+
+	// restic.PoolAlloc()
 }