1 files changed, 45 insertions, 7 deletions

diff --git a/fetch-pack.h b/fetch-pack.h
index bb45a366a8..8c7752fc82 100644
--- a/fetch-pack.h
+++ b/fetch-pack.h
@@ -5,6 +5,7 @@
 #include "run-command.h"
 #include "protocol.h"
 #include "list-objects-filter-options.h"
+#include "oidset.h"
 
 struct oid_array;
 
@@ -16,6 +17,13 @@ struct fetch_pack_args {
 	const struct string_list *deepen_not;
 	struct list_objects_filter_options filter_options;
 	const struct string_list *server_options;
+
+	/*
+	 * If not NULL, during packfile negotiation, fetch-pack will send "have"
+	 * lines only with these tips and their ancestors.
+	 */
+	const struct oid_array *negotiation_tips;
+
 	unsigned deepen_relative:1;
 	unsigned quiet:1;
 	unsigned keep_pack:1;
@@ -32,15 +40,33 @@ struct fetch_pack_args {
 	unsigned self_contained_and_connected:1;
 	unsigned cloning:1;
 	unsigned update_shallow:1;
+	unsigned reject_shallow_remote:1;
 	unsigned deepen:1;
+	unsigned refetch:1;
+
+	/*
+	 * Indicate that the remote of this request is a promisor remote. The
+	 * pack received does not need all referred-to objects to be present in
+	 * the local object store, and fetch-pack will store the pack received
+	 * together with a ".promisor" file indicating that the aforementioned
+	 * pack is a promisor pack.
+	 */
 	unsigned from_promisor:1;
 
 	/*
-	 * If 1, fetch_pack() will also not modify any object flags.
-	 * This allows fetch_pack() to safely be called by any function,
-	 * regardless of which object flags it uses (if any).
+	 * Because fetch_pack() overwrites the shallow file upon a
+	 * successful deepening non-clone fetch, if this struct
+	 * specifies such a fetch, fetch_pack() needs to perform a
+	 * connectivity check before deciding if a fetch is successful
+	 * (and overwriting the shallow file). fetch_pack() sets this
+	 * field to 1 if such a connectivity check was performed.
+	 *
+	 * This is different from check_self_contained_and_connected
+	 * in that the former allows existing objects in the
+	 * repository to satisfy connectivity needs, whereas the
+	 * latter doesn't.
 	 */
-	unsigned no_dependents:1;
+	unsigned connectivity_checked:1;
 };
 
 /*
@@ -49,16 +75,28 @@ struct fetch_pack_args {
  * marked as such.
  */
 struct ref *fetch_pack(struct fetch_pack_args *args,
-		       int fd[], struct child_process *conn,
+		       int fd[],
 		       const struct ref *ref,
-		       const char *dest,
 		       struct ref **sought,
 		       int nr_sought,
 		       struct oid_array *shallow,
-		       char **pack_lockfile,
+		       struct string_list *pack_lockfiles,
 		       enum protocol_version version);
 
 /*
+ * Execute the --negotiate-only mode of "git fetch", adding all known common
+ * commits to acked_commits.
+ *
+ * In the capability advertisement that has happened prior to invoking this
+ * function, the "wait-for-done" capability must be present.
+ */
+void negotiate_using_fetch(const struct oid_array *negotiation_tips,
+			   const struct string_list *server_options,
+			   int stateless_rpc,
+			   int fd[],
+			   struct oidset *acked_commits);
+
+/*
  * Print an appropriate error message for each sought ref that wasn't
  * matched.  Return 0 if all sought refs were matched, otherwise 1.
  */