fix #321

Add `ExitStatus`
Fix REPL tests

crates/erg_compiler/main.rs

@@ -2,11 +2,9 @@ extern crate erg_common;
 extern crate erg_compiler;
 extern crate erg_parser;
 
-use std::process;
-
 use erg_common::config::{ErgConfig, ErgMode::*};
 use erg_common::spawn::exec_new_thread;
-use erg_common::traits::Runnable;
+use erg_common::traits::{ExitStatus, Runnable};
 
 use erg_compiler::build_hir::HIRBuilder;
 use erg_compiler::lower::ASTLowerer;
@@ -19,33 +17,20 @@ use erg_parser::ParserRunner;
 
 fn run() {
     let cfg = ErgConfig::parse();
-    match cfg.mode {
-        Lex => {
-            LexerRunner::run(cfg);
-        }
-        Parse => {
-            ParserRunner::run(cfg);
-        }
-        TypeCheck => {
-            ASTLowerer::run(cfg);
-        }
-        FullCheck => {
-            HIRBuilder::run(cfg);
-        }
-        Transpile => {
-            Transpiler::run(cfg);
-        }
-        Compile | Execute => {
-            Compiler::run(cfg);
-        }
-        Read => {
-            Deserializer::run(cfg);
-        }
+    let stat = match cfg.mode {
+        Lex => LexerRunner::run(cfg),
+        Parse => ParserRunner::run(cfg),
+        TypeCheck => ASTLowerer::run(cfg),
+        FullCheck => HIRBuilder::run(cfg),
+        Transpile => Transpiler::run(cfg),
+        Compile | Execute => Compiler::run(cfg),
+        Read => Deserializer::run(cfg),
         other => {
             println!("invalid mode: {other}");
-            process::exit(1);
+            ExitStatus::ERR1
         }
-    }
+    };
+    std::process::exit(stat.code);
 }
 
 fn main() {

crates/erg_compiler/ty/deserialize.rs

@@ -1,5 +1,4 @@
 //! バイトコードからオブジェクトを復元する
-use std::process;
 use std::string::FromUtf8Error;
 
 use erg_common::cache::CacheSet;
@@ -8,6 +7,7 @@ use erg_common::dict::Dict;
 use erg_common::error::{ErrorCore, ErrorKind, Location, SubMessage};
 use erg_common::python_util::PythonVersion;
 use erg_common::serialize::DataTypePrefix;
+use erg_common::traits::ExitStatus;
 use erg_common::{fn_name, switch_lang};
 use erg_common::{RcArray, Str};
 
@@ -110,21 +110,23 @@ impl Deserializer {
         }
     }
 
-    pub fn run(cfg: ErgConfig) {
+    pub fn run(cfg: ErgConfig) -> ExitStatus {
         let Input::File(filename) = cfg.input else {
             eprintln!("{:?} is not a filename", cfg.input);
-            process::exit(1);
+            return ExitStatus::ERR1;
         };
         match CodeObj::from_pyc(&filename) {
             Ok(codeobj) => {
                 println!("{}", codeobj.code_info(None));
+                ExitStatus::OK
             }
             Err(e) => {
                 eprintln!(
                     "failed to deserialize {}: {}",
                     filename.to_string_lossy(),
                     e.desc
-                )
+                );
+                ExitStatus::ERR1
             }
         }
     }