Make Rails arguments optional

Calling rails-new without any arguments fails with error: (error: the following required arguments were not provided: <ARGS>..). Making rails arguments optional allows to simply run rails-new and see what params are required for scaffolding new rails application (for example app name).

Author: Rukomoynikov

src/rails_new.rs

@@ -3,7 +3,7 @@ use clap::{Parser, Subcommand};
 #[derive(Parser)]
 #[command(version, about, long_about = None, subcommand_negates_reqs = true)]
 pub struct Cli {
-    #[clap(trailing_var_arg = true, required = true)]
+    #[clap(trailing_var_arg = true)]
     /// arguments passed to `rails new`
     pub args: Vec<String>,
     #[clap(long, short = 'u', default_value = "latest")]

tests/cli.rs

@@ -1,17 +1,15 @@
 use assert_cmd::prelude::*;
-use predicates::prelude::*;
 use std::process::Command;
 
 #[test]
 fn requires_a_name() -> Result<(), Box<dyn std::error::Error>> {
-    let mut cmd = Command::cargo_bin("rails-new")?;
+  let mut cmd = Command::cargo_bin("rails-new")?;
 
-    cmd.assert()
-        .failure()
-        .stderr(predicate::str::contains(
-            "the following required arguments were not provided:",
-        ))
-        .stderr(predicate::str::contains("<ARGS>..."));
+  cmd
+    .spawn()
+    .unwrap()
+    .wait_with_output()
+    .expect("rails new weblog --api");
 
-    Ok(())
-}
+  Ok(())
+}