add status command (#10)

add `pim status` command that shows if pim is currently running its pid.

commands/commands.go

@@ -68,6 +68,18 @@ func LogCommand(command []string, database *lib.Database) error {
   return lib.ViewLog(database, command[2])
 }
 
+func StatusCommand() error {
+  pid, lockErr := lib.ReadLockFile()
+  processCount := lib.CountPimProcesses()
+  if processCount > 0 {
+    lib.Info.Printf("Pim is currently running at: %d", pid)
+    return lockErr
+  } else {
+    lib.Info.Println("No pim process running.")
+    return nil
+  }
+}
+
 func StartCommand(process lib.Process, database *lib.Database) error {
   if setupErr := SetupStart(); setupErr != nil {
     return setupErr

commands/lib/io.go

@@ -96,14 +96,19 @@ func ReadLockFile() (int, error) {
   return intPid, nil
 }
 
-func RemoveDanglingLock() {
+func CountPimProcesses() int {
   processCount := 0
   test, _ := ExecuteCommand("ps -u")
   for _, line := range strings.Split(test, "\n") {
     if strings.Contains(line, "pim start") {
       processCount += 1
     }
   }
+  return processCount
+}
+
+func RemoveDanglingLock() {
+  processCount := CountPimProcesses()
   if processCount < 2 && LockExists() {
     removeErr := os.Remove(LOCKPATH)
     if removeErr != nil {

pim.go

@@ -25,6 +25,8 @@ func parseCommand(command []string, process lib.Process, database *lib.Database)
       return pim.StartCommand(process, database)
     case "stop":
       return pim.StopCommand()
+    case "status":
+      return pim.StatusCommand()
     case "log", "logs":
       return pim.LogCommand(command, database)
     case "ls":