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main.go
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main.go
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// See LICENSE.txt for licensing information.
package main
import (
"flag"
"fmt"
"os"
"path/filepath"
"regexp"
"strconv"
"time"
)
const (
VERSION = `0.9.4`
timeFmt = `2006-01-02 15:04:05`
fileFmt = `2006-01-02_150405`
)
var build = `UNKNOWN` // injected in Makefile
var (
flagConfig string
flagShort bool
flagVerbose bool
cfg *Config
idRange = regexp.MustCompile(`(\d+)-(\d+)`)
spinner = Spinner{}
)
func init() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, `Usage: %s (options...) <command>
saver v%s by Piotr S. Staszewski, see LICENSE.txt
binary build by %s
Options:
`, os.Args[0], VERSION, build)
flag.PrintDefaults()
fmt.Fprintln(os.Stderr, `
Commands:
[list] - list games
<name> [add] <path> - add new game
<name> [b]ackup (note) - backup current save
<name> [l]ist - list saves
<name> [r]estore <id|ref> - restore given save
<name> [del]ete <id|from-to> - delete given save(s)
<name> [i]nfo - game info, mostly paths to stuff
<name> check[sum]s - checksum (MD5) all backups
<name> [kill] - delete game and all saves
[migrate] - migrate config, if needed
Where:
name - arbitrary name used to identify a game/character/world etc.
path - absolute path to save file/directory
note - optional quoted note, e.g. "haven't died yet"
id - particular save id
from-to - inclusive range of save ids
ref - non-positive offset from the latest save, e.g. -1 is the save before the latest`)
}
flag.StringVar(&flagConfig, "c", "saver.json", "path to config file")
flag.BoolVar(&flagShort, "s", false, "be short, be scriptful")
flag.BoolVar(&flagVerbose, "v", false, "be very verbose")
}
func main() {
flag.Parse()
checkArgs(false, 1)
if flagConfig == "" {
fmt.Fprintln(os.Stderr, "Config file path can't be empty")
os.Exit(2)
}
flagConfig, err := filepath.Abs(flagConfig)
dieOnErr("Can't resolve config path", err)
save := false
if _, err := os.Stat(flagConfig); err != nil {
r, err := os.Getwd()
dieOnErr("Can't get current path", err)
cfg = &Config{
Root: r,
Games: make([]*Game, 0),
}
fmt.Println("Will save fresh config to", flagConfig)
save = true
} else {
c, err := loadConfig(flagConfig)
dieOnErr("Config load error", err)
cfg = c
}
switch flag.Arg(0) {
case "list":
// list games
cfg.PrintWhole()
case "migrate":
// migrate config to latest version
err := cfg.Migrate()
dieOnErr("ERROR", err)
save = true
default:
// per-game commands
checkArgs(false, 2)
game := flag.Arg(0)
if flag.Arg(1) == "add" {
// add a new game
checkArgs(true, 3)
if g := cfg.GetGame(game); g != nil {
fmt.Fprintf(os.Stderr, "Game \"%s\" already exist\n", game)
os.Exit(1)
}
p, err := filepath.Abs(flag.Arg(2))
dieOnErr("Can't resolve path", err)
gm, err := cfg.AddGame(game, p)
dieOnErr("ERROR", err)
gm.PrintHeader()
gm.Print()
save = true
} else {
g := cfg.GetGame(game)
if g == nil {
fmt.Fprintf(os.Stderr, "Game \"%s\" not found\n", game)
os.Exit(1)
}
switch flag.Arg(1) {
case "l", "list":
// list game saves
g.PrintWhole()
case "i", "info":
// print game paths etc.
g.PrintInfo()
case "kill":
// remove game and all saves
err := cfg.DelGame(game)
dieOnErr("ERROR", err)
fmt.Printf("Deleted game \"%s\" and all backed up saves\n", game)
save = true
case "b", "backup":
// backup current save
sv, err := g.Backup()
dieOnErr("ERROR", err)
g.Stamp = time.Now()
if flag.NArg() > 2 {
sv.Note = flag.Arg(2)
}
fmt.Printf("%3d ", len(g.Saves))
sv.Print()
save = true
case "r", "restore":
// restore selected save
checkArgs(true, 3)
if len(g.Saves) < 1 {
fmt.Fprintf(os.Stderr, "Game \"%s\" has no saves backed up\n", g.Name)
os.Exit(1)
}
i, err := strconv.Atoi(flag.Arg(2))
dieOnErr(fmt.Sprintf("Malformed index \"%s\"", flag.Arg(2)), err)
sv, err := g.Restore(i)
dieOnErr("ERROR", err)
g.Stamp = time.Now()
fmt.Println("Restored save from", sv.Stamp.Format(timeFmt))
if sv.Note != "" {
fmt.Println("Save note:", sv.Note)
}
save = true
case "del", "delete":
// delete save(s)
checkArgs(true, 3)
if len(g.Saves) < 1 {
fmt.Fprintf(os.Stderr, "Game \"%s\" has no saves backed up\n", g.Name)
os.Exit(1)
}
var err error
var f, t int
f, err = strconv.Atoi(flag.Arg(2))
t = f
if err != nil {
m := idRange.FindStringSubmatch(flag.Arg(2))
f, err = strconv.Atoi(m[1])
dieOnErr(fmt.Sprintf("Malformed index/range \"%s\"", flag.Arg(2)), err)
t, err = strconv.Atoi(m[2])
dieOnErr(fmt.Sprintf("Malformed index/range \"%s\"", flag.Arg(2)), err)
}
n, err := g.Delete(f, t)
if err != nil {
fmt.Fprintln(os.Stderr, "ERROR:", err)
}
fmt.Printf("Deleted %d save(s)\n", n)
save = true
case "sum", "checksums":
g.ChecksumAll()
default:
flag.Usage()
os.Exit(1)
}
}
}
if save {
err := cfg.Save(flagConfig)
dieOnErr("Can't save config", err)
}
}
func dieOnErr(msg string, err error) {
if err != nil {
fmt.Fprintln(os.Stderr, msg+":", err)
os.Exit(3)
}
}
func checkArgs(exact bool, num int) {
if (exact && flag.NArg() != num) ||
(!exact && flag.NArg() < num) {
flag.Usage()
os.Exit(1)
}
}