fix: windows specific bug

crates/erg_common/python_util.rs

@@ -1,7 +1,9 @@
 //! utilities for calling CPython.
 //!
 //! CPythonを呼び出すためのユーティリティー
-use std::fs;
+use std::env;
+use std::fs::{self, File};
+use std::io::Write;
 use std::path::{Path, PathBuf};
 use std::process::{Command, ExitStatus, Stdio};
 
@@ -853,11 +855,30 @@ pub fn spawn_py(py_command: Option<&str>, code: &str) {
 
 pub fn exec_py_code(code: &str, output: Output) -> std::io::Result<ExitStatus> {
     let mut out = if cfg!(windows) {
+        let fallback = |err: std::io::Error| {
+            // if the filename or extension is too long
+            // create a temporary file and execute it
+            if err.raw_os_error() == Some(206) {
+                let tmp_dir = env::temp_dir();
+                let tmp_file = tmp_dir.join("tmp.py");
+                File::create(&tmp_file)
+                    .unwrap()
+                    .write_all(code.as_bytes())
+                    .unwrap();
+                Command::new(which_python())
+                    .arg(tmp_file)
+                    .stdout(output.clone())
+                    .spawn()
+            } else {
+                Err(err)
+            }
+        };
         Command::new(which_python())
             .arg("-c")
             .arg(code)
-            .stdout(output)
+            .stdout(output.clone())
             .spawn()
+            .or_else(fallback)
             .expect("cannot execute python")
     } else {
         let exec_command = format!("{} -c \"{code}\"", which_python());