libgit2: Account for further API changes

libgit2-sys/lib.rs

@@ -200,6 +200,8 @@ git_enum! {
         GIT_EOWNER = -36,
         GIT_TIMEOUT = -37,
         GIT_EUNCHANGED = -38,
+        GIT_ENOTSUPPORTED = -39,
+        GIT_EREADONLY = -40,
     }
 }
 
@@ -878,7 +880,8 @@ git_enum! {
         GIT_CONFIG_LEVEL_XDG = 3,
         GIT_CONFIG_LEVEL_GLOBAL = 4,
         GIT_CONFIG_LEVEL_LOCAL = 5,
-        GIT_CONFIG_LEVEL_APP = 6,
+        GIT_CONFIG_LEVEL_WORKTREE = 6,
+        GIT_CONFIG_LEVEL_APP = 7,
         GIT_CONFIG_HIGHEST_LEVEL = -1,
     }
 }
@@ -1974,6 +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,

systest/build.rs

@@ -25,7 +25,9 @@ fn main() {
         // this field is marked as const which ctest complains about
         (struct_ == "git_rebase_operation" && f == "id") ||
         // the real name of this field is ref but that is a reserved keyword
-        (struct_ == "git_worktree_add_options" && f == "reference")
+        (struct_ == "git_worktree_add_options" && f == "reference") ||
+        // the `update_flags` field consists of 2 bitfields
+        (struct_ == "git_fetch_options" && f == "update_flags")
     });
     cfg.skip_signededness(|s| match s {
         s if s.ends_with("_cb") => true,