fix(cudart-sys): strip the "V" from the version string

Author: robik75

crates/cudart-sys/src/utils.rs

@@ -1,4 +1,3 @@
-use std::fs::File;
 use std::path::{Path, PathBuf};
 
 pub fn get_cuda_path() -> Option<&'static Path> {
@@ -47,18 +46,19 @@ pub fn get_cuda_lib_path() -> Option<PathBuf> {
 pub fn get_cuda_version() -> Option<String> {
     if let Some(version) = option_env!("CUDA_VERSION") {
         Some(version.to_string())
-    } else if let Some(path) = get_cuda_path() {
+    } else if get_cuda_path().is_some() {
         let re = regex_lite::Regex::new(r"V(?<version>\d{2}\.\d+\.\d+)").unwrap();
         let nvcc_out = std::process::Command::new("nvcc")
             .arg("--version")
             .output()
             .expect("failed to start `nvcc`");
         let nvcc_str = std::str::from_utf8(&nvcc_out.stdout).expect("`nvcc` output is not UTF8");
-        let captures = re.captures(&nvcc_str).unwrap();
-        let version = captures
+        let version = re
+            .captures(nvcc_str)
+            .unwrap()
             .get(0)
             .expect("unable to find nvcc version in the form VMM.mm.pp in the output of `nvcc --version`:\n{nvcc_str}")
-            .as_str()
+            .as_str()[1..]
             .to_string();
         Some(version)
     } else {