Remove num_cpus

Author: Mark-Simulacrum

Cargo.lock

@@ -67,5 +67,4 @@ aws-sdk-s3 = "0.22"
 [dev-dependencies]
 assert_cmd = "2.0.4"
 difference = "2.0.0"
-num_cpus = "1.8.0"
-predicates = "1.0.0"
+predicates = "2.0.0"

Cargo.toml

@@ -142,7 +142,11 @@ impl MinicraterRun {
         let ex_dir = PathBuf::from("tests").join("minicrater").join(self.ex);
         let config_file = ex_dir.join("config.toml");
 
-        let threads_count = if self.multithread { num_cpus::get() } else { 1 };
+        let threads_count = if self.multithread {
+            std::thread::available_parallelism().map_or(1, |r| r.get())
+        } else {
+            1
+        };
 
         let report_dir = tempfile::tempdir().expect("failed to create report dir");
         let ex_arg = format!(