cmd: update usage, add option [--codis|--redis]

Author: spinlock

cmd/main.go

@@ -63,9 +63,9 @@ func main() {
 	usage := `
 Usage:
 	redis-port decode   [--ncpu=N]  [--parallel=M]  [--input=INPUT]  [--output=OUTPUT]
-	redis-port restore  [--ncpu=N]  [--parallel=M]  [--input=INPUT]                          --target=TARGET   [--codis] [--auth=AUTH]  [--faketime=FAKETIME]               [--filterdb=DB] [--extra]
-	redis-port sync     [--ncpu=N]  [--parallel=M]   --from=MASTER   [--password=PASSWORD]   --target=TARGET   [--codis] [--auth=AUTH]  [--sockfile=FILE [--filesize=SIZE]] [--filterdb=DB] [--psync]
-	redis-port dump     [--ncpu=N]  [--parallel=M]   --from=MASTER   [--password=PASSWORD]  [--output=OUTPUT]  [--extra]
+	redis-port restore  [--ncpu=N]  [--parallel=M]  [--input=INPUT]  [--faketime=FAKETIME] [--extra] [--filterdb=DB] --target=TARGET [--auth=AUTH] [--redis|--codis]
+	redis-port sync     [--ncpu=N]  [--parallel=M]   --from=MASTER   [--password=PASSWORD] [--psync] [--filterdb=DB] --target=TARGET [--auth=AUTH] [--redis|--codis] [--sockfile=FILE [--filesize=SIZE]]
+	redis-port dump     [--ncpu=N]  [--parallel=M]   --from=MASTER   [--password=PASSWORD] [--extra] [--output=OUTPUT]
 
 Options:
 	-n N, --ncpu=N                    Set runtime.GOMAXPROCS to N.
@@ -80,7 +80,8 @@ Options:
 	--sockfile=FILE                   Use FILE to as socket buffer, default is disabled.
 	--filesize=SIZE                   Set FILE size, default value is 1gb.
 	-e, --extra                       Set true to send/receive following redis commands, default is false.
-	--codis                           Target is codis proxy or normal redis instance.
+	--redis                           Target is normal redis instance, default is false.
+	--codis                           Target is codis proxy, default is true.
 	--filterdb=DB                     Filter db = DB, default is *.
 	--psync                           Use PSYNC command.
 `
@@ -120,11 +121,12 @@ Options:
 	args.auth, _ = d["--auth"].(string)
 	args.target, _ = d["--target"].(string)
 
-	args.extra, _ = d["--extra"].(bool)
-	args.psync, _ = d["--psync"].(bool)
-	args.codis, _ = d["--codis"].(bool)
 	args.sockfile, _ = d["--sockfile"].(string)
 
+	args.extra = d["--extra"].(bool)
+	args.psync = d["--psync"].(bool)
+	args.codis = d["--codis"].(bool) || !d["--redis"].(bool)
+
 	if s, ok := d["--faketime"].(string); ok && s != "" {
 		switch s[0] {
 		case '-', '+':