add plugin for gosuv

README.md

@@ -1,6 +1,17 @@
 # gosuv
 golang port of python-supervisor
 
+# Plugin Design
+
+If executable file put in folder `$HOME/.gosuv/cmdplugin` with prefix `gosuv-`, gosuv will treat this file as a subcommand.
+
+for example:
+
+	$HOME/.gosuv/cmdplugin/ --.
+		|- gosuv-showpid			-rwx
+
+When run `gosuv showpid`, file `gosuv-showpid` will be called.
+
 # Design
 
 Has a folder `.gosuv` under `$HOME` path.

gosuv.go

@@ -3,11 +3,13 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"io/ioutil"
 	"net/http"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/codegangsta/cli"
@@ -15,6 +17,10 @@ import (
 	"github.com/qiniu/log"
 )
 
+var (
+	CMDPLUGIN_DIR = filepath.Join(GOSUV_HOME, "cmdplugin")
+)
+
 func MkdirIfNoExists(dir string) error {
 	dir = os.ExpandEnv(dir)
 	if _, err := os.Stat(dir); err != nil {
@@ -23,6 +29,17 @@ func MkdirIfNoExists(dir string) error {
 	return nil
 }
 
+func ShellTestFile(flag string, file string) bool {
+	finfo, err := os.Stat(file)
+	switch flag {
+	case "x":
+		if err == nil && (finfo.Mode()&os.ModeExclusive) == 0 {
+			return true
+		}
+	}
+	return false
+}
+
 func chttp(method string, url string, v ...interface{}) (res *JSONResponse, err error) {
 	var resp *http.Response
 	switch method {
@@ -224,6 +241,25 @@ func init() {
 			Action: ServAction,
 		},
 	}
+	finfos, err := ioutil.ReadDir(CMDPLUGIN_DIR)
+	log.Println(err)
+	if err != nil {
+		return
+	}
+	for _, finfo := range finfos {
+		if finfo.IsDir() {
+			continue
+		}
+		modeExec := os.FileMode(0500)
+		if strings.HasPrefix(finfo.Name(), "gosuv-") && (finfo.Mode()&modeExec) == modeExec {
+			log.Println(finfo)
+			cmdName := string(finfo.Name()[6:])
+			app.Commands = append(app.Commands, cli.Command{
+				Name:  cmdName,
+				Usage: "Plugin command",
+			})
+		}
+	}
 }
 
 var (