worktree: Update struct representation for git_worktree_add_options

Author: bnjmnt4n

libgit2-sys/lib.rs

@@ -1977,6 +1977,7 @@ git_enum! {
 pub struct git_worktree_add_options {
     pub version: c_uint,
     pub lock: c_int,
+    pub checkout_existing: c_int,
     pub reference: *mut git_reference,
     pub checkout_options: git_checkout_options,
 }

src/worktree.rs

@@ -165,6 +165,12 @@ impl<'a> WorktreeAddOptions<'a> {
         self
     }
 
+    /// If enabled, this will checkout the existing branch matching the worktree name.
+    pub fn checkout_existing(&mut self, enabled: bool) -> &mut WorktreeAddOptions<'a> {
+        self.raw.checkout_existing = enabled as c_int;
+        self
+    }
+
     /// reference to use for the new worktree HEAD
     pub fn reference(
         &mut self,