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package main
import (
"code.laria.me/petrific/config"
"code.laria.me/petrific/storage"
"code.laria.me/petrific/storage/registry"
"flag"
"fmt"
"os"
)
type subcmd func(args []string) int
var subcmds = map[string]subcmd{
"write-dir": WriteDir,
"restore-dir": RestoreDir,
"take-snapshot": TakeSnapshot,
"create-snapshot": CreateSnapshot,
"list-snapshots": ListSnapshots,
"restore-snapshot": RestoreSnapshot,
}
func subcmdUsage(name string, usage string, flags *flag.FlagSet) func() {
return func() {
fmt.Fprintf(os.Stderr, "Usage: %s %s %s\n", os.Args[0], name, usage)
if flags != nil {
fmt.Fprintln(os.Stderr, "\nFlags:")
flags.PrintDefaults()
}
}
}
func subcmdErrout(name string) func(error) {
return func(err error) {
fmt.Fprintf(os.Stderr, "%s: %s\n", name, err)
}
}
// Global flags
var (
flagConfPath = flag.String("config", "", "Use this config file instead of the default")
flagStorage = flag.String("storage", "", "Operate on this storage instead of the default one")
)
var conf config.Config
var objectstore storage.Storage
func main() {
os.Exit(Main())
}
func Main() int {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s [global flags] command\n\nAvailable commands:\n", os.Args[0])
for cmd := range subcmds {
fmt.Fprintf(os.Stderr, " %s\n", cmd)
}
fmt.Fprintln(os.Stderr, "\nGlobal flags:")
flag.PrintDefaults()
}
flag.Parse()
if !loadConfig() {
return 1
}
defer objectstore.Close()
remaining := make([]string, 0)
for _, arg := range flag.Args() {
if arg != "" {
remaining = append(remaining, arg)
}
}
var cmd subcmd
if len(remaining) > 0 {
cmd = subcmds[remaining[0]]
}
if cmd == nil {
flag.Usage()
return 1
}
return cmd(remaining[1:])
}
func loadConfig() bool {
var err error
conf, err = config.LoadConfig(*flagConfPath)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed reading config: %s\n", err)
return false
}
storageName := *flagStorage
if storageName == "" {
storageName = conf.DefaultStorage
}
storageOptions, ok := conf.Storage[storageName]
if !ok {
fmt.Fprintf(os.Stderr, "Storage %s not found\n", storageName)
return false
}
var method string
if err := storageOptions.Get("method", &method); err != nil {
fmt.Fprintf(os.Stderr, "Failed setting up storage %s: %s\n", storageName, err)
return false
}
st, ok := registry.StorageTypes[method]
if !ok {
fmt.Fprintf(os.Stderr, "Failed setting up storage %s: Method %s unknown", storageName, method)
return false
}
s, err := st(conf, storageName)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed setting up storage %s: %s\n", storageName, err)
return false
}
objectstore = s
return true
}
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