fix: pdm run conflicts between local file and PATH (#2223)

news/2221.bugfix.md

@@ -0,0 +1 @@
+`pdm run` should only find local file if the command starts with `./`.

src/pdm/cli/commands/run.py

@@ -121,8 +121,11 @@ def get_task(self, script_name: str) -> Task | None:
 
     def expand_command(self, command: str) -> str:
         expanded_command = os.path.expanduser(os.path.expandvars(command))
-        if os.path.exists(expanded_command):
-            return os.path.abspath(expanded_command)
+        if expanded_command.replace(os.sep, "/").startswith(("./", "../")):
+            abspath = os.path.abspath(expanded_command)
+            if not os.path.isfile(abspath):
+                raise PdmUsageError(f"Command [success]'{command}'[/] is not a valid executable.")
+            return abspath
         result = self.project.environment.which(command)
         if not result:
             raise PdmUsageError(f"Command [success]'{command}'[/] is not found in your PATH.")

tests/cli/test_run.py

@@ -152,6 +152,13 @@ def test_run_script_with_relative_path(project, pdm, capfd):
     assert out.strip() == "Hello"
 
 
+def test_run_non_existing_local_script(project, pdm):
+    with cd(project.root):
+        result = pdm(["run", "./test_script.sh"], obj=project)
+    assert result.exit_code != 0
+    assert "not a valid executable" in result.stderr
+
+
 @pytest.mark.parametrize(
     "args,expected",
     (