Make git-symbolic-ref a builtin

Signed-off-by: Matthias Kestenholz <matthias@spinlock.ch>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Makefile

@@ -184,7 +184,6 @@ PROGRAMS = \
 	git-ssh-upload$X git-unpack-file$X \
 	git-update-server-info$X \
 	git-upload-pack$X git-verify-pack$X \
-	git-symbolic-ref$X \
 	git-pack-redundant$X git-var$X \
 	git-describe$X git-merge-tree$X git-blame$X git-imap-send$X
 
@@ -199,7 +198,7 @@ BUILT_INS = git-log$X git-whatchanged$X git-show$X git-update-ref$X \
 	git-diff-index$X git-diff-stages$X git-diff-tree$X git-cat-file$X \
 	git-fmt-merge-msg$X git-prune$X git-mv$X git-prune-packed$X \
 	git-repo-config$X git-name-rev$X git-pack-objects$X \
-	git-unpack-objects$X
+	git-unpack-objects$X git-symbolic-ref$X
 
 # what 'all' will build and 'install' will install, in gitexecdir
 ALL_PROGRAMS = $(PROGRAMS) $(SIMPLE_PROGRAMS) $(SCRIPTS)
@@ -257,7 +256,8 @@ BUILTIN_OBJS = \
 	builtin-cat-file.o builtin-mailsplit.o builtin-stripspace.o \
 	builtin-update-ref.o builtin-fmt-merge-msg.o builtin-prune.o \
 	builtin-mv.o builtin-prune-packed.o builtin-repo-config.o \
-	builtin-name-rev.o builtin-pack-objects.o builtin-unpack-objects.o
+	builtin-name-rev.o builtin-pack-objects.o builtin-unpack-objects.o \
+	builtin-symbolic-ref.o
 
 GITLIBS = $(LIB_FILE) $(XDIFF_LIB)
 LIBS = $(GITLIBS) -lz

builtin-symbolic-ref.c

@@ -1,3 +1,4 @@
+#include "builtin.h"
 #include "cache.h"
 
 static const char git_symbolic_ref_usage[] =
@@ -17,9 +18,8 @@ static void check_symref(const char *HEAD)
 		die("No such ref: %s", HEAD);
 }
 
-int main(int argc, const char **argv)
+int cmd_symbolic_ref(int argc, const char **argv, const char *prefix)
 {
-	setup_git_directory();
 	git_config(git_default_config);
 	switch (argc) {
 	case 2:

builtin.h

@@ -52,6 +52,7 @@ extern int cmd_repo_config(int argc, const char **argv, const char *prefix);
 extern int cmd_name_rev(int argc, const char **argv, const char *prefix);
 extern int cmd_pack_objects(int argc, const char **argv, const char *prefix);
 extern int cmd_unpack_objects(int argc, const char **argv, const char *prefix);
+extern int cmd_symbolic_ref(int argc, const char **argv, const char *prefix);
 
 extern int cmd_write_tree(int argc, const char **argv, const char *prefix);
 extern int write_tree(unsigned char *sha1, int missing_ok, const char *prefix);

git.c

@@ -268,6 +268,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
 		{ "name-rev", cmd_name_rev, NEEDS_PREFIX },
 		{ "pack-objects", cmd_pack_objects, NEEDS_PREFIX },
 		{ "unpack-objects", cmd_unpack_objects, NEEDS_PREFIX },
+		{ "symbolic-ref", cmd_symbolic_ref, NEEDS_PREFIX },
 	};
 	int i;