make "git hash-object" a built-in

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Makefile

@@ -387,7 +387,6 @@ EXTRA_PROGRAMS =
 # ... and all the rest that could be moved out of bindir to gitexecdir
 PROGRAMS += $(EXTRA_PROGRAMS)
 PROGRAMS += git-fast-import$X
-PROGRAMS += git-hash-object$X
 PROGRAMS += git-imap-send$X
 PROGRAMS += git-index-pack$X
 PROGRAMS += git-merge-index$X
@@ -658,6 +657,7 @@ BUILTIN_OBJS += builtin-for-each-ref.o
 BUILTIN_OBJS += builtin-fsck.o
 BUILTIN_OBJS += builtin-gc.o
 BUILTIN_OBJS += builtin-grep.o
+BUILTIN_OBJS += builtin-hash-object.o
 BUILTIN_OBJS += builtin-help.o
 BUILTIN_OBJS += builtin-init-db.o
 BUILTIN_OBJS += builtin-log.o

builtin-hash-object.c

@@ -73,17 +73,14 @@ static const struct option hash_object_options[] = {
 	OPT_END()
 };
 
-int main(int argc, const char **argv)
+int cmd_hash_object(int argc, const char **argv, const char *prefix)
 {
 	int i;
-	const char *prefix = NULL;
 	int prefix_length = -1;
 	const char *errstr = NULL;
 
 	type = blob_type;
 
-	git_extract_argv0_path(argv[0]);
-
 	argc = parse_options(argc, argv, NULL, hash_object_options,
 			     hash_object_usage, 0);
 

builtin.h

@@ -55,6 +55,7 @@ extern int cmd_fsck(int argc, const char **argv, const char *prefix);
 extern int cmd_gc(int argc, const char **argv, const char *prefix);
 extern int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix);
 extern int cmd_grep(int argc, const char **argv, const char *prefix);
+extern int cmd_hash_object(int argc, const char **argv, const char *prefix);
 extern int cmd_help(int argc, const char **argv, const char *prefix);
 extern int cmd_http_fetch(int argc, const char **argv, const char *prefix);
 extern int cmd_init_db(int argc, const char **argv, const char *prefix);

git.c

@@ -318,6 +318,7 @@ static void handle_internal_command(int argc, const char **argv)
 		{ "gc", cmd_gc, RUN_SETUP },
 		{ "get-tar-commit-id", cmd_get_tar_commit_id },
 		{ "grep", cmd_grep, USE_PAGER },
+		{ "hash-object", cmd_hash_object },
 		{ "help", cmd_help },
 		{ "init", cmd_init_db },
 		{ "init-db", cmd_init_db },