check_replace_refs: rename to read_replace_refs

This was added as a NEEDSWORK in c3c36d7de2 (replace-object:
check_replace_refs is safe in multi repo environment, 2018-04-11),
waiting for a calmer period. Since doing so now doesn't conflict
with anything in 'pu', it seems as good a time as any.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/fsck.c

@@ -689,7 +689,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 	fetch_if_missing = 0;
 
 	errors_found = 0;
-	check_replace_refs = 0;
+	read_replace_refs = 0;
 
 	argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
 

builtin/index-pack.c

@@ -1679,7 +1679,7 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
 	if (argc == 2 && !strcmp(argv[1], "-h"))
 		usage(index_pack_usage);
 
-	check_replace_refs = 0;
+	read_replace_refs = 0;
 	fsck_options.walk = mark_link;
 
 	reset_pack_idx_option(&opts);

builtin/pack-objects.c

@@ -3188,7 +3188,7 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 	if (DFS_NUM_STATES > (1 << OE_DFS_STATE_BITS))
 		BUG("too many dfs states, increase OE_DFS_STATE_BITS");
 
-	check_replace_refs = 0;
+	read_replace_refs = 0;
 
 	reset_pack_idx_option(&pack_idx_opts);
 	git_config(git_pack_config, NULL);

builtin/prune.c

@@ -118,7 +118,7 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
 
 	expire = TIME_MAX;
 	save_commit_buffer = 0;
-	check_replace_refs = 0;
+	read_replace_refs = 0;
 	ref_paranoia = 1;
 	init_revisions(&revs, prefix);
 

builtin/replace.c

@@ -544,7 +544,7 @@ int cmd_replace(int argc, const char **argv, const char *prefix)
 		OPT_END()
 	};
 
-	check_replace_refs = 0;
+	read_replace_refs = 0;
 	git_config(git_default_config, NULL);
 
 	argc = parse_options(argc, argv, prefix, options, git_replace_usage, 0);

builtin/unpack-objects.c

@@ -513,7 +513,7 @@ int cmd_unpack_objects(int argc, const char **argv, const char *prefix)
 	int i;
 	struct object_id oid;
 
-	check_replace_refs = 0;
+	read_replace_refs = 0;
 
 	git_config(git_default_config, NULL);
 

builtin/upload-pack.c

@@ -31,7 +31,7 @@ int cmd_upload_pack(int argc, const char **argv, const char *prefix)
 	};
 
 	packet_trace_identity("upload-pack");
-	check_replace_refs = 0;
+	read_replace_refs = 0;
 
 	argc = parse_options(argc, argv, NULL, options, upload_pack_usage, 0);
 

cache.h

@@ -806,7 +806,7 @@ void reset_shared_repository(void);
  * $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 check_replace_refs;
+extern int read_replace_refs;
 extern char *git_replace_ref_base;
 
 extern int fsync_object_files;

environment.c

@@ -51,7 +51,7 @@ const char *editor_program;
 const char *askpass_program;
 const char *excludes_file;
 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
-int check_replace_refs = 1; /* NEEDSWORK: rename to read_replace_refs */
+int read_replace_refs = 1;
 char *git_replace_ref_base;
 enum eol core_eol = EOL_UNSET;
 int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
@@ -183,7 +183,7 @@ void setup_git_env(const char *git_dir)
 	argv_array_clear(&to_free);
 
 	if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
-		check_replace_refs = 0;
+		read_replace_refs = 0;
 	replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
 	free(git_replace_ref_base);
 	git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base

git.c

@@ -164,7 +164,7 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
 			if (envchanged)
 				*envchanged = 1;
 		} else if (!strcmp(cmd, "--no-replace-objects")) {
-			check_replace_refs = 0;
+			read_replace_refs = 0;
 			setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
 			if (envchanged)
 				*envchanged = 1;

log-tree.c

@@ -91,7 +91,7 @@ static int add_ref_decoration(const char *refname, const struct object_id *oid,
 
 	if (starts_with(refname, git_replace_ref_base)) {
 		struct object_id original_oid;
-		if (!check_replace_refs)
+		if (!read_replace_refs)
 			return 0;
 		if (get_oid_hex(refname + strlen(git_replace_ref_base),
 				&original_oid)) {

replace-object.c

@@ -51,7 +51,7 @@ static void prepare_replace_object(struct repository *r)
  * replacement object's name (replaced recursively, if necessary).
  * The return value is either oid or a pointer to a
  * permanently-allocated value.  This function always respects replace
- * references, regardless of the value of check_replace_refs.
+ * references, regardless of the value of read_replace_refs.
  */
 const struct object_id *do_lookup_replace_object(struct repository *r,
 						 const struct object_id *oid)

replace-object.h

@@ -26,7 +26,7 @@ extern const struct object_id *do_lookup_replace_object(struct repository *r,
 static inline const struct object_id *lookup_replace_object(struct repository *r,
 							    const struct object_id *oid)
 {
-	if (!check_replace_refs ||
+	if (!read_replace_refs ||
 	    (r->objects->replace_map &&
 	     r->objects->replace_map->map.tablesize == 0))
 		return oid;