Merge branch 'bc/object-id'

Conversion from uchar[20] to struct object_id continues.

* bc/object-id: (42 commits)
  merge-one-file: compute empty blob object ID
  add--interactive: compute the empty tree value
  Update shell scripts to compute empty tree object ID
  sha1_file: only expose empty object constants through git_hash_algo
  dir: use the_hash_algo for empty blob object ID
  sequencer: use the_hash_algo for empty tree object ID
  cache-tree: use is_empty_tree_oid
  sha1_file: convert cached object code to struct object_id
  builtin/reset: convert use of EMPTY_TREE_SHA1_BIN
  builtin/receive-pack: convert one use of EMPTY_TREE_SHA1_HEX
  wt-status: convert two uses of EMPTY_TREE_SHA1_HEX
  submodule: convert several uses of EMPTY_TREE_SHA1_HEX
  sequencer: convert one use of EMPTY_TREE_SHA1_HEX
  merge: convert empty tree constant to the_hash_algo
  builtin/merge: switch tree functions to use object_id
  builtin/am: convert uses of EMPTY_TREE_SHA1_BIN to the_hash_algo
  sha1-file: add functions for hex empty tree and blob OIDs
  builtin/receive-pack: avoid hard-coded constants for push certs
  diff: specify abbreviation size in terms of the_hash_algo
  upload-pack: replace use of several hard-coded constants
  ...

1 files changed, 4 insertions, 3 deletions

diff --git a/submodule-config.h b/submodule-config.h
index 21273f56a..ca1f94e2d 100644
--- a/submodule-config.h
+++ b/submodule-config.h
@@ -1,6 +1,7 @@
 #ifndef SUBMODULE_CONFIG_CACHE_H
 #define SUBMODULE_CONFIG_CACHE_H
 
+#include "cache.h"
 #include "hashmap.h"
 #include "submodule.h"
 #include "strbuf.h"
@@ -17,13 +18,13 @@ struct submodule {
 	const char *ignore;
 	const char *branch;
 	struct submodule_update_strategy update_strategy;
-	/* the sha1 blob id of the responsible .gitmodules file */
-	unsigned char gitmodules_sha1[20];
+	/* the object id of the responsible .gitmodules file */
+	struct object_id gitmodules_oid;
 	int recommend_shallow;
 };
 
 #define SUBMODULE_INIT { NULL, NULL, NULL, RECURSE_SUBMODULES_NONE, \
-	NULL, NULL, SUBMODULE_UPDATE_STRATEGY_INIT, {0}, -1 };
+	NULL, NULL, SUBMODULE_UPDATE_STRATEGY_INIT, { { 0 } }, -1 };
 
 struct submodule_cache;
 struct repository;