From 466a31590eb94c44cc55eb5793a6bf171d5ce242 Mon Sep 17 00:00:00 2001
From: Benjamin Eckel <bhelx@simst.im>
Date: Thu, 11 Jan 2024 18:37:52 -0600
Subject: [PATCH] fix: better error message when wasm-merge not found

---
 Cargo.toml             | 2 +-
 crates/cli/src/main.rs | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index a15c653..5210c25 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ members = [
 ]
 
 [workspace.package]
-version = "1.0.0-rc4"
+version = "1.0.0-rc5"
 edition = "2021"
 authors = ["The Extism Authors"]
 license = "BSD-Clause-3"
diff --git a/crates/cli/src/main.rs b/crates/cli/src/main.rs
index 0d47443..a650fd4 100644
--- a/crates/cli/src/main.rs
+++ b/crates/cli/src/main.rs
@@ -110,6 +110,11 @@ fn main() -> Result<()> {
         &import_shim_path,
     )?;
 
+    let output = Command::new("wasm-merge").arg("--version").output();
+    if let Err(_) = output {
+        bail!("Failed to execute wasm-merge. Please install binaryen and make sure wasm-merge is on your path: https://github.com/WebAssembly/binaryen");
+    }
+
     // Merge the export shim with the core module
     let mut command = Command::new("wasm-merge")
         .arg(&core_path)