pass thread-limit along to checkout (#301)

gitoxide-core/src/index/checkout.rs

@@ -17,6 +17,7 @@ pub fn checkout_exclusive(
         index: Options { object_hash, .. },
         empty_files,
         keep_going,
+        thread_limit,
     }: index::checkout_exclusive::Options,
 ) -> anyhow::Result<()> {
     let repo = repo
@@ -57,6 +58,7 @@ pub fn checkout_exclusive(
         destination_is_initially_empty: true,
         overwrite_existing: false,
         keep_going,
+        thread_limit,
         ..Default::default()
     };
 

gitoxide-core/src/index/mod.rs

@@ -29,6 +29,10 @@ pub mod checkout_exclusive {
         /// If true, all files will be written with zero bytes despite having made an ODB lookup.
         pub empty_files: bool,
         pub keep_going: bool,
+        /// If set, don't use more than this amount of threads.
+        /// Otherwise, usually use as many threads as there are logical cores.
+        /// A value of 0 is interpreted as no-limit
+        pub thread_limit: Option<usize>,
     }
 }
 

src/plumbing/main.rs

@@ -102,6 +102,7 @@ pub fn main() -> Result<()> {
                             index: core::index::Options { object_hash, format },
                             empty_files,
                             keep_going,
+                            thread_limit,
                         },
                     )
                 },