Move repository_format_partial_clone to promisor-remote.c

Now that we have has_promisor_remote() and can use many
promisor remotes, let's hide repository_format_partial_clone
as a static in promisor-remote.c to avoid it being use
for anything other than managing backward compatibility.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: chriscool

cache.h

@@ -958,7 +958,6 @@ extern int grafts_replace_parents;
 #define GIT_REPO_VERSION 0
 #define GIT_REPO_VERSION_READ 1
 extern int repository_format_precious_objects;
-extern char *repository_format_partial_clone;
 extern const char *core_partial_clone_filter_default;
 extern int repository_format_worktree_config;
 

environment.c

@@ -31,7 +31,6 @@ int warn_ambiguous_refs = 1;
 int warn_on_object_refname_ambiguity = 1;
 int ref_paranoia = -1;
 int repository_format_precious_objects;
-char *repository_format_partial_clone;
 const char *core_partial_clone_filter_default;
 int repository_format_worktree_config;
 const char *git_commit_encoding;

promisor-remote.c

@@ -4,6 +4,13 @@
 #include "config.h"
 #include "transport.h"
 
+static char *repository_format_partial_clone;
+
+void set_repository_format_partial_clone(char *partial_clone)
+{
+	repository_format_partial_clone = xstrdup_or_null(partial_clone);
+}
+
 static int fetch_refs(const char *remote_name, struct ref *ref)
 {
 	struct remote *remote;

promisor-remote.h

@@ -20,4 +20,10 @@ extern struct promisor_remote *promisor_remote_find(const char *remote_name);
 extern int has_promisor_remote(void);
 extern int promisor_remote_get_direct(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.
+ */
+extern void set_repository_format_partial_clone(char *partial_clone);
+
 #endif /* PROMISOR_REMOTE_H */

setup.c

@@ -4,6 +4,7 @@
 #include "dir.h"
 #include "string-list.h"
 #include "chdir-notify.h"
+#include "promisor-remote.h"
 
 static int inside_git_dir = -1;
 static int inside_work_tree = -1;
@@ -477,7 +478,7 @@ static int check_repository_format_gently(const char *gitdir, struct repository_
 	}
 
 	repository_format_precious_objects = candidate->precious_objects;
-	repository_format_partial_clone = xstrdup_or_null(candidate->partial_clone);
+	set_repository_format_partial_clone(candidate->partial_clone);
 	repository_format_worktree_config = candidate->worktree_config;
 	string_list_clear(&candidate->unknown_extensions, 0);