transpile: tests: Run test_translator.py from cargo nextest with the currently built transpiler path

c2rust/tests/test_translator.rs

@@ -0,0 +1,16 @@
+use std::process::Command;
+
+#[test]
+fn test_translator() {
+    let transpile_path = env!("CARGO_BIN_EXE_c2rust-transpile");
+
+    let mut cmd = Command::new("../scripts/test_translator.py");
+    cmd.args(["../tests/unit", "--transpiler"]);
+    cmd.arg(transpile_path);
+
+    let status = cmd
+        .status()
+        .unwrap_or_else(|e| panic!("{cmd:?} failed: {e}"));
+
+    assert!(status.success(), "{cmd:?} failed with {status}");
+}

scripts/test_translator.py

@@ -654,6 +654,10 @@ def main() -> None:
     desc = 'run regression / unit / feature tests.'
     parser = argparse.ArgumentParser(description=desc)
     parser.add_argument('directory', type=readable_directory)
+    parser.add_argument(
+        '--transpiler', dest='transpiler',
+        default=None, help='Override the path to the c2rust transpiler binary'
+    )
     parser.add_argument(
         '--only-files', dest='regex_files', type=regex,
         default='.*', help="Regular expression to filter which tests to run"
@@ -681,6 +685,10 @@ def main() -> None:
 
     args = parser.parse_args()
     c.update_args(args)
+
+    if args.transpiler is not None:
+        c.TRANSPILER = args.transpiler
+
     test_directories = get_testdirectories(args.directory,
                                            args.regex_files,
                                            args.keep,