From 25bc28e331cab46633a1b933e0093fa450c4ace1 Mon Sep 17 00:00:00 2001
From: Haobo Gu <haobogu@outlook.com>
Date: Mon, 28 Oct 2024 10:59:54 +0800
Subject: [PATCH 1/2] Add support for -h/--help arg

Signed-off-by: Haobo Gu <haobogu@outlook.com>
---
 CHANGELOG.md |  4 ++++
 src/main.rs  | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 63641c1..cbc27d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+- [#102] Add support for -h/--help arg and no arg
+
+[#102]: https://github.com/knurling-rs/flip-link/pull/102
+
 ## [v0.1.9] - 2024-08-14
 
 - [#96] Add support for @file args
diff --git a/src/main.rs b/src/main.rs
index eac095d..5f8abbb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -29,6 +29,24 @@ fn notmain() -> Result<i32> {
     // NOTE `skip` the name/path of the binary (first argument)
     let raw_args = env::args().skip(1).collect::<Vec<_>>();
 
+    // If there's no argument provided, print the help message
+    if matches!(
+        raw_args
+            .iter()
+            .map(|s| s.as_str())
+            .collect::<Vec<&str>>()
+            .as_slice(),
+        [] | ["--help"] | ["-h"]
+    ) {
+        eprintln!(
+            "flip-link: adds zero-cost stack overflow protection to your \
+            embedded programs\nYou should not use flip-link directly from \
+            command line, use flip-link as your default linker instead. \n\n\
+            For detailed usage, check https://github.com/knurling-rs/flip-link"
+        );
+        return Ok(0);
+    }
+
     {
         let exit_status = linking::link_normally(&raw_args)?;
         if !exit_status.success() {

From 5e514c30aefea37adac37b5ea24b3862043c361d Mon Sep 17 00:00:00 2001
From: Johann Hemmann <johann.hemmann@proton.me>
Date: Mon, 28 Oct 2024 17:32:59 +0100
Subject: [PATCH 2/2] Simplify condition

---
 src/main.rs | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 5f8abbb..82bac6a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -30,14 +30,7 @@ fn notmain() -> Result<i32> {
     let raw_args = env::args().skip(1).collect::<Vec<_>>();
 
     // If there's no argument provided, print the help message
-    if matches!(
-        raw_args
-            .iter()
-            .map(|s| s.as_str())
-            .collect::<Vec<&str>>()
-            .as_slice(),
-        [] | ["--help"] | ["-h"]
-    ) {
+    if let None | Some("--help" | "-h") = raw_args.first().map(String::as_str) {
         eprintln!(
             "flip-link: adds zero-cost stack overflow protection to your \
             embedded programs\nYou should not use flip-link directly from \