From e7129590622595b87513b6279f8d8bd76c21ba24 Mon Sep 17 00:00:00 2001
From: Gerard CL <gerardcl@gmail.com>
Date: Sat, 19 Sep 2026 21:27:17 +0200
Subject: [PATCH] fix: python CLI without args show help message

---
 CHANGELOG.md |  4 ++++
 Cargo.lock   |  2 +-
 Cargo.toml   |  2 +-
 Justfile     |  2 +-
 src/cli.rs   | 16 ++++++++++------
 5 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe5d7f4..6a0dbcf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## v6.3.1 (2026-09-15)
+
+* Python CLI does not show help message when no args are provided [#214](https://github.com/gerardcl/renfe-cli/issues/214)
+
 ## v6.3.0 (2026-09-14)
 
 * Enable version flag and version status check [#180](https://github.com/gerardcl/renfe-cli/issues/180)
diff --git a/Cargo.lock b/Cargo.lock
index 38be7e2..6e73dd7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1198,7 +1198,7 @@ dependencies = [
 
 [[package]]
 name = "renfe-cli"
-version = "6.3.0"
+version = "6.3.1"
 dependencies = [
  "bincode",
  "chrono",
diff --git a/Cargo.toml b/Cargo.toml
index ce2a044..5fb5f48 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "renfe-cli"
-version = "6.3.0"
+version = "6.3.1"
 edition = "2024"
 rust-version = "1.98"
 authors = ["Gerard C.L. <gerardcl@gmail.com>"]
diff --git a/Justfile b/Justfile
index cf0d0e4..9cb6fd8 100644
--- a/Justfile
+++ b/Justfile
@@ -34,7 +34,7 @@ setup-hooks:
 
 # Run the development CLI through the local virtual environment.
 run *args:
-    uv run renfe-cli {{args}}
+    uv run --no-sync renfe-cli {{args}}
 
 # Open a Python shell in the development environment.
 python:
diff --git a/src/cli.rs b/src/cli.rs
index e0dfc37..e53c826 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -1,6 +1,7 @@
 use chrono::{Datelike, Utc};
 use getopts::Options;
-use pyo3::{PyResult, exceptions::PyValueError, pyfunction};
+use pyo3::types::PyAnyMethods;
+use pyo3::{PyResult, Python, exceptions::PyValueError, pyfunction};
 use std::env;
 use std::io::{self, BufRead, Write};
 
@@ -8,16 +9,19 @@ use crate::renfe::{Renfe, Station};
 use crate::version::{Registry, print_version_status};
 
 #[pyfunction]
-pub fn main() -> PyResult<()> {
-  run(Registry::PyPi)
+pub fn main(py: Python<'_>) -> PyResult<()> {
+  let args = py
+    .import("sys")?
+    .getattr("argv")?
+    .extract::<Vec<String>>()?;
+  run(Registry::PyPi, args)
 }
 
 pub fn native_main() -> PyResult<()> {
-  run(Registry::CratesIo)
+  run(Registry::CratesIo, env::args().collect())
 }
 
-fn run(registry: Registry) -> PyResult<()> {
-  let args: Vec<String> = env::args().collect();
+fn run(registry: Registry, args: Vec<String>) -> PyResult<()> {
   let program = args[0].clone();
   let now = Utc::now();
   let opts = set_opts();