merge-recursive: avoid showing conflicts with merge branch before HEAD

diff --git a/cache.h b/cache.h
index 66d3b91cdb1d14bbe2499f90a0e1f6d9785b4b37..d508f3d4f8837caef469389c71950ee96eea709b 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -917,15 +917,6 @@ enum log_refs_config {
 };
 extern enum log_refs_config log_all_ref_updates;
 
-enum branch_track {
-       BRANCH_TRACK_UNSPECIFIED = -1,
-       BRANCH_TRACK_NEVER = 0,
-       BRANCH_TRACK_REMOTE,
-       BRANCH_TRACK_ALWAYS,
-       BRANCH_TRACK_EXPLICIT,
-       BRANCH_TRACK_OVERRIDE
-};
-
 enum rebase_setup_type {
        AUTOREBASE_NEVER = 0,
        AUTOREBASE_LOCAL,
@@ -942,7 +933,6 @@ enum push_default_type {
        PUSH_DEFAULT_UNSPECIFIED
 };
 
-extern enum branch_track git_branch_track;
 extern enum rebase_setup_type autorebase;
 extern enum push_default_type push_default;
 
@@ -1033,6 +1023,16 @@ extern const struct object_id null_oid;
 
 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 {
+       /*
+        * This is a temporary optimization hack. By asserting the size here,
+        * we let the compiler know that it's always going to be 20, which lets
+        * it turn this fixed-size memcmp into a few inline instructions.
+        *
+        * This will need to be extended or ripped out when we learn about
+        * hashes of different sizes.
+        */
+       if (the_hash_algo->rawsz != 20)
+               BUG("hash size not yet supported by hashcmp");
        return memcmp(sha1, sha2, the_hash_algo->rawsz);
 }
 
@@ -1041,14 +1041,24 @@ static inline int oidcmp(const struct object_id *oid1, const struct object_id *o
        return hashcmp(oid1->hash, oid2->hash);
 }
 
+static inline int hasheq(const unsigned char *sha1, const unsigned char *sha2)
+{
+       return !hashcmp(sha1, sha2);
+}
+
+static inline int oideq(const struct object_id *oid1, const struct object_id *oid2)
+{
+       return hasheq(oid1->hash, oid2->hash);
+}
+
 static inline int is_null_sha1(const unsigned char *sha1)
 {
-       return !hashcmp(sha1, null_sha1);
+       return hasheq(sha1, null_sha1);
 }
 
 static inline int is_null_oid(const struct object_id *oid)
 {
-       return !hashcmp(oid->hash, null_sha1);
+       return hasheq(oid->hash, null_sha1);
 }
 
 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
@@ -1085,22 +1095,22 @@ static inline void oidread(struct object_id *oid, const unsigned char *hash)
 
 static inline int is_empty_blob_sha1(const unsigned char *sha1)
 {
-       return !hashcmp(sha1, the_hash_algo->empty_blob->hash);
+       return hasheq(sha1, the_hash_algo->empty_blob->hash);
 }
 
 static inline int is_empty_blob_oid(const struct object_id *oid)
 {
-       return !oidcmp(oid, the_hash_algo->empty_blob);
+       return oideq(oid, the_hash_algo->empty_blob);
 }
 
 static inline int is_empty_tree_sha1(const unsigned char *sha1)
 {
-       return !hashcmp(sha1, the_hash_algo->empty_tree->hash);
+       return hasheq(sha1, the_hash_algo->empty_tree->hash);
 }
 
 static inline int is_empty_tree_oid(const struct object_id *oid)
 {
-       return !oidcmp(oid, the_hash_algo->empty_tree);
+       return oideq(oid, the_hash_algo->empty_tree);
 }
 
 const char *empty_tree_oid_hex(void);
@@ -1518,6 +1528,7 @@ struct checkout {
        unsigned force:1,
                 quiet:1,
                 not_new:1,
+                clone:1,
                 refresh_cache:1;
 };
 #define CHECKOUT_INIT { NULL, "" }