[Finsh] Stop push new history when current cmd is same as last cmd.

components/finsh/shell.c

@@ -371,6 +371,9 @@ static void shell_push_history(struct finsh_shell *shell)
     {
         /* push history */
         if (shell->history_count >= FINSH_HISTORY_LINES)
+        {
+            /* if current cmd is same as last cmd, don't push */
+            if (memcmp(&shell->cmd_history[FINSH_HISTORY_LINES - 1], shell->line, shell->line_position))
             {
                 /* move history */
                 int index;
@@ -385,8 +388,13 @@ static void shell_push_history(struct finsh_shell *shell)
                 /* it's the maximum history */
                 shell->history_count = FINSH_HISTORY_LINES;
             }
+        }
         else
         {
+            /* if current cmd is same as last cmd, don't push */
+            if (shell->history_count == 0 || memcmp(&shell->cmd_history[shell->history_count - 1], shell->line, shell->line_position))
+            {
+                shell->current_history = shell->history_count;
                 memset(&shell->cmd_history[shell->history_count][0], 0, FINSH_CMD_SIZE);
                 memcpy(&shell->cmd_history[shell->history_count][0], shell->line, shell->line_position);
 
@@ -394,6 +402,7 @@ static void shell_push_history(struct finsh_shell *shell)
                 shell->history_count ++;
             }
         }
+    }
     shell->current_history = shell->history_count;
 }
 #endif