From 9b4c63a2d838fdbe2e1e1f3c2c9d6b432ddd19f9 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Mon, 20 Jan 2025 15:55:01 +0100
Subject: [PATCH] usage(): do not emit blank line when a single argument
 exceeds set_usage_max_line_width()

---
 include/argparse/argparse.hpp |  3 ++-
 test/test_help.cpp            | 10 ++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/include/argparse/argparse.hpp b/include/argparse/argparse.hpp
index c8c99b6..57a34f6 100644
--- a/include/argparse/argparse.hpp
+++ b/include/argparse/argparse.hpp
@@ -2128,7 +2128,8 @@ public:
           }
         }
         cur_mutex = arg_mutex;
-        if (curline.size() + 1 + arg_inline_usage.size() >
+        if (curline.size() != indent_size &&
+            curline.size() + 1 + arg_inline_usage.size() >
             this->m_usage_max_line_width) {
           stream << curline << std::endl;
           curline = std::string(indent_size, ' ');
diff --git a/test/test_help.cpp b/test/test_help.cpp
index 382a92b..a5572ca 100644
--- a/test/test_help.cpp
+++ b/test/test_help.cpp
@@ -244,3 +244,13 @@ TEST_CASE("multiline usage, break on mutex") {
         "               [--will-go-on-new-line]\n"
         "               [--on-a-dedicated-line]");
 }
+
+TEST_CASE("multiline usage, single arg that is larger than the max width") {
+    argparse::ArgumentParser program("program");
+    program.set_usage_max_line_width(80);
+    program.add_argument("--lots-of-choices").metavar("<veeeeeeeeeeeeeeeeeeeeeeeeeeery_long|veeeeeeeeeeeeeeeeeeeery_long2>");
+    // std::cout << "DEBUG:" << program.usage() << std::endl;
+    REQUIRE(program.usage() ==
+        "Usage: program [--help] [--version]\n"
+        "               [--lots-of-choices <veeeeeeeeeeeeeeeeeeeeeeeeeeery_long|veeeeeeeeeeeeeeeeeeeery_long2>]");
+}