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[PATCH 04/23] object-store: prepare read_object_file to deal with any repo

As read_object_file is a widely used function (which is also regularly used
in new code in flight between master..pu), changing its signature is painful
is hard, as other series in flight rely on the original signature. It would
burden the maintainer if we'd just change the signature.

Introduce repo_read_object_file which takes the repository argument, and
hide the original read_object_file as a macro behind
e675765235 (diff.c: remove implicit dependency on the_index, 2018-09-21)

Add a coccinelle patch to convert existing callers, but do not apply
the resulting patch to keep the diff of this patch small.

Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
 contrib/coccinelle/the_repository.pending.cocci | 12 ++++++++++++
 object-store.h                                  | 10 ++++++++--
 2 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 contrib/coccinelle/the_repository.pending.cocci

diff --git a/contrib/coccinelle/the_repository.pending.cocci b/contrib/coccinelle/the_repository.pending.cocci
new file mode 100644
index 0000000000..a7ac9e0c46
--- /dev/null
+++ b/contrib/coccinelle/the_repository.pending.cocci
@@ -0,0 +1,12 @@
+// This file is used for the ongoing refactoring of
+// bringing the index or repository struct in all of
+// our code base.
+expression E;
+expression F;
+expression G;
+- read_object_file(
++ repo_read_object_file(the_repository,
+  E, F, G)
diff --git a/object-store.h b/object-store.h
index 3d98a682b2..00a64622e6 100644
--- a/object-store.h
+++ b/object-store.h
@@ -165,10 +165,16 @@ extern void *read_object_file_extended(struct repository *r,
 				       const struct object_id *oid,
 				       enum object_type *type,
 				       unsigned long *size, int lookup_replace);
-static inline void *read_object_file(const struct object_id *oid, enum object_type *type, unsigned long *size)
+static inline void *repo_read_object_file(struct repository *r,
+					  const struct object_id *oid,
+					  enum object_type *type,
+					  unsigned long *size)
-	return read_object_file_extended(the_repository, oid, type, size, 1);
+	return read_object_file_extended(r, oid, type, size, 1);
+#define read_object_file(oid, type, size) repo_read_object_file(the_repository, oid, type, size)
 /* Read and unpack an object file into memory, write memory to an object file */
 int oid_object_info(struct repository *r, const struct object_id *, unsigned long *);