merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 41 insertions, 0 deletions

diff --git a/third_party/git/promisor-remote.h b/third_party/git/promisor-remote.h
new file mode 100644
index 000000000000..c7a14063c51e
--- /dev/null
+++ b/third_party/git/promisor-remote.h
@@ -0,0 +1,41 @@
+#ifndef PROMISOR_REMOTE_H
+#define PROMISOR_REMOTE_H
+
+#include "repository.h"
+
+struct object_id;
+
+/*
+ * Promisor remote linked list
+ *
+ * Information in its fields come from remote.XXX config entries or
+ * from extensions.partialclone.
+ */
+struct promisor_remote {
+	struct promisor_remote *next;
+	const char *partial_clone_filter;
+	const char name[FLEX_ARRAY];
+};
+
+void promisor_remote_reinit(void);
+struct promisor_remote *promisor_remote_find(const char *remote_name);
+int has_promisor_remote(void);
+
+/*
+ * Fetches all requested objects from all promisor remotes, trying them one at
+ * a time until all objects are fetched. Returns 0 upon success, and non-zero
+ * otherwise.
+ *
+ * If oid_nr is 0, this function returns 0 (success) immediately.
+ */
+int promisor_remote_get_direct(struct repository *repo,
+			       const struct object_id *oids,
+			       int oid_nr);
+
+/*
+ * This should be used only once from setup.c to set the value we got
+ * from the extensions.partialclone config option.
+ */
+void set_repository_format_partial_clone(char *partial_clone);
+
+#endif /* PROMISOR_REMOTE_H */