Update main.rs

Append option `mem-size` of command `sys-info`

Author: 梶塚太智

src/main.rs

@@ -8,7 +8,7 @@ use std::io::{self, Error, Read, Write};
 use std::path::Path;
 use std::thread::{self, sleep};
 use std::time::{Duration, SystemTime, UNIX_EPOCH};
-use sys_info::{cpu_num, cpu_speed, hostname, os_release, os_type};
+use sys_info::{cpu_num, cpu_speed, hostname, mem_info, os_release, os_type};
 
 #[cfg(test)]
 mod test;
@@ -1130,6 +1130,10 @@ impl Executor {
                     "cpu-num" => Type::Number(cpu_num().unwrap_or(0) as f64),
                     "cpu-speed" => Type::Number(cpu_speed().unwrap_or(0) as f64),
                     "host-name" => Type::String(hostname().unwrap_or("".to_string())),
+                    "mem-size" => match mem_info() {
+                        Ok(info) => Type::Number(info.total as f64),
+                        Err(_) => Type::Error("sys-info".to_string()),
+                    },
                     _ => Type::Error("sys-info".to_string()),
                 })
             }