Improve filer command help, add supported filer store list

1 files changed, 21 insertions, 5 deletions

diff --git a/weed/command/filer.go b/weed/command/filer.go
index c9f9a1956..7e0e92d4a 100644
--- a/weed/command/filer.go
+++ b/weed/command/filer.go
@@ -6,10 +6,13 @@ import (
 	"net/http"
 	"os"
 	"runtime"
+	"sort"
+	"strings"
 	"time"
 
 	"google.golang.org/grpc/reflection"
 
+	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
@@ -114,10 +117,8 @@ func init() {
 	filerIamOptions.port = cmdFiler.Flag.Int("iam.port", 8111, "iam server http listen port")
 }
 
-var cmdFiler = &Command{
-	UsageLine: "filer -port=8888 -master=<ip:port>[,<ip:port>]*",
-	Short:     "start a file server that points to a master server, or a list of master servers",
-	Long: `start a file server which accepts REST operation for any files.
+func filerLongDesc() string {
+	desc := `start a file server which accepts REST operation for any files.
 
 	//create or overwrite the file, the directories /path/to will be automatically created
 	POST /path/to/file
@@ -133,7 +134,22 @@ var cmdFiler = &Command{
 
 	The example filer.toml configuration file can be generated by "weed scaffold -config=filer"
 
-`,
+Supported Filer Stores:
+`
+
+	storeNames := make([]string, len(filer.Stores))
+	for i, store := range filer.Stores {
+		storeNames[i] = "\t" + store.GetName()
+	}
+	sort.Strings(storeNames)
+	storeList := strings.Join(storeNames, "\n")
+	return desc + storeList
+}
+
+var cmdFiler = &Command{
+	UsageLine: "filer -port=8888 -master=<ip:port>[,<ip:port>]*",
+	Short:     "start a file server that points to a master server, or a list of master servers",
+	Long:      filerLongDesc(),
 }
 
 func runFiler(cmd *Command, args []string) bool {