replace-object.h: move read_replace_refs declaration from cache.h to here

Adjust several files to be more explicit about their dependency on
replace-objects to accommodate this change.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/replace-object.h b/replace-object.h
index 3c92ae9461..500482b02b 100644
--- a/replace-object.h
+++ b/replace-object.h
@@ -1,11 +1,18 @@
 #ifndef REPLACE_OBJECT_H
 #define REPLACE_OBJECT_H
 
-#include "cache.h"
 #include "oidmap.h"
 #include "repository.h"
 #include "object-store.h"
 
+/*
+ * Do replace refs need to be checked this run?  This variable is
+ * initialized to true unless --no-replace-object is used or
+ * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some
+ * commands that do not want replace references to be active.
+ */
+extern int read_replace_refs;
+
 struct replace_object {
 	struct oidmap_entry original;
 	struct object_id replacement;