fix: Set extension of shim

Cargo.toml

@@ -16,14 +16,15 @@ name = "cargo-bin"
 path = "src/main.rs"
 
 [dependencies]
-anyhow = "1.0.40"
-clap = "4.3.19"
-owo-colors = "3.5.0"
-serde = { version = "1.0.149", features = ["derive"] }
-toml = "0.5.9"
-toml_edit = "0.19.14"
-version_check = "0.9.3"
-which = "4.4.0"
+anyhow = "=1.0.40"
+cfg-if = "=1.0.0"
+clap = "=4.3.19"
+owo-colors = "=3.5.0"
+serde = { version = "=1.0.149", features = ["derive"] }
+toml = "=0.5.9"
+toml_edit = "=0.19.14"
+version_check = "=0.9.3"
+which = "=4.4.0"
 
 [dev-dependencies]
 assert_cmd = "2.0.12"

src/shims.rs

@@ -4,6 +4,7 @@ use std::io::Write;
 use std::path;
 
 use anyhow::Result;
+use cfg_if::cfg_if;
 
 use crate::metadata;
 
@@ -77,7 +78,13 @@ pub fn sync() -> Result<()> {
             continue;
         }
 
-        let bin_path = bin_dir.join(&bin);
+        let mut bin_path = bin_dir.join(&bin);
+        bin_path.set_extension("");
+        cfg_if! {
+            if #[cfg(not(target_family = "unix"))] {
+                bin_path.set_extension("cmd");
+            }
+        }
         if bin_path.exists() {
             continue;
         }