Const tightening.

Mark Wooding noticed there was a type mismatch warning in git.c; this
patch does things slightly differently (mostly tightening const) and
was what I was holding onto, waiting for the setup-revisions change
to be merged into the master branch.

Signed-off-by: Junio C Hamano <junkio@cox.net>

blame.c

@@ -226,6 +226,7 @@ static void print_patch(struct patch *p)
 	}
 }
 
+#if 0
 /* For debugging only */
 static void print_map(struct commit *cmit, struct commit *other)
 {
@@ -259,6 +260,7 @@ static void print_map(struct commit *cmit, struct commit *other)
 		printf("\n");
 	}
 }
+#endif
 
 // p is a patch from commit to other.
 static void fill_line_map(struct commit *commit, struct commit *other,

exec_cmd.c

@@ -29,10 +29,9 @@ const char *git_exec_path(void)
 }
 
 
-int execv_git_cmd(char **argv)
+int execv_git_cmd(const char **argv)
 {
 	char git_command[PATH_MAX + 1];
-	char *tmp;
 	int len, err, i;
 	const char *paths[] = { current_exec_path,
 				getenv("GIT_EXEC_PATH"),
@@ -40,6 +39,8 @@ int execv_git_cmd(char **argv)
 
 	for (i = 0; i < sizeof(paths)/sizeof(paths[0]); ++i) {
 		const char *exec_dir = paths[i];
+		const char *tmp;
+
 		if (!exec_dir) continue;
 
 		if (*exec_dir != '/') {
@@ -82,7 +83,7 @@ int execv_git_cmd(char **argv)
 		argv[0] = git_command;
 
 		/* execve() can only ever return if it fails */
-		execve(git_command, argv, environ);
+		execve(git_command, (char **)argv, environ);
 
 		err = errno;
 
@@ -93,11 +94,11 @@ int execv_git_cmd(char **argv)
 }
 
 
-int execl_git_cmd(char *cmd,...)
+int execl_git_cmd(const char *cmd,...)
 {
 	int argc;
-	char *argv[MAX_ARGS + 1];
+	const char *argv[MAX_ARGS + 1];
-	char *arg;
+	const char *arg;
 	va_list param;
 
 	va_start(param, cmd);

exec_cmd.h

@@ -3,8 +3,8 @@
 
 extern void git_set_exec_path(const char *exec_path);
 extern const char* git_exec_path(void);
-extern int execv_git_cmd(char **argv); /* NULL terminated */
+extern int execv_git_cmd(const char **argv); /* NULL terminated */
-extern int execl_git_cmd(char *cmd, ...);
+extern int execl_git_cmd(const char *cmd, ...);
 
 
 #endif /* __GIT_EXEC_CMD_H_ */

git.c

@@ -216,33 +216,33 @@ static void prepend_to_path(const char *dir, int len)
 	setenv("PATH", path, 1);
 }
 
-static void show_man_page(char *git_cmd)
+static void show_man_page(const char *git_cmd)
 {
-	char *page;
+	const char *page;
 
 	if (!strncmp(git_cmd, "git", 3))
 		page = git_cmd;
 	else {
 		int page_len = strlen(git_cmd) + 4;
-
+		char *p = malloc(page_len + 1);
-		page = malloc(page_len + 1);
+		strcpy(p, "git-");
-		strcpy(page, "git-");
+		strcpy(p + 4, git_cmd);
-		strcpy(page + 4, git_cmd);
+		p[page_len] = 0;
-		page[page_len] = 0;
+		page = p;
 	}
 
 	execlp("man", "man", page, NULL);
 }
 
-static int cmd_version(int argc, char **argv, char **envp)
+static int cmd_version(int argc, const char **argv, char **envp)
 {
 	printf("git version %s\n", GIT_VERSION);
 	return 0;
 }
 
-static int cmd_help(int argc, char **argv, char **envp)
+static int cmd_help(int argc, const char **argv, char **envp)
 {
-	char *help_cmd = argv[1];
+	const char *help_cmd = argv[1];
 	if (!help_cmd)
 		cmd_usage(git_exec_path(), NULL);
 	show_man_page(help_cmd);
@@ -251,7 +251,7 @@ static int cmd_help(int argc, char **argv, char **envp)
 
 #define LOGSIZE (65536)
 
-static int cmd_log(int argc, char **argv, char **envp)
+static int cmd_log(int argc, const char **argv, char **envp)
 {
 	struct rev_info rev;
 	struct commit *commit;
@@ -263,7 +263,7 @@ static int cmd_log(int argc, char **argv, char **envp)
 
 	argc = setup_revisions(argc, argv, &rev, "HEAD");
 	while (1 < argc) {
-		char *arg = argv[1];
+		const char *arg = argv[1];
 		if (!strncmp(arg, "--pretty", 8)) {
 			commit_format = get_commit_format(arg + 8);
 			if (commit_format == CMIT_FMT_ONELINE)
@@ -325,12 +325,12 @@ static int cmd_log(int argc, char **argv, char **envp)
 
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
 
-static void handle_internal_command(int argc, char **argv, char **envp)
+static void handle_internal_command(int argc, const char **argv, char **envp)
 {
 	const char *cmd = argv[0];
 	static struct cmd_struct {
 		const char *cmd;
-		int (*fn)(int, char **, char **);
+		int (*fn)(int, const char **, char **);
 	} commands[] = {
 		{ "version", cmd_version },
 		{ "help", cmd_help },
@@ -346,9 +346,9 @@ static void handle_internal_command(int argc, char **argv, char **envp)
 	}
 }
 
-int main(int argc, char **argv, char **envp)
+int main(int argc, const char **argv, char **envp)
 {
-	char *cmd = argv[0];
+	const char *cmd = argv[0];
 	char *slash = strrchr(cmd, '/');
 	char git_command[PATH_MAX + 1];
 	const char *exec_path = NULL;

receive-pack.c

@@ -6,7 +6,7 @@
 
 static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
 
-static char *unpacker[] = { "unpack-objects", NULL };
+static const char *unpacker[] = { "unpack-objects", NULL };
 
 static int report_status = 0;
 
@@ -177,7 +177,7 @@ static void run_update_post_hook(struct command *cmd)
 {
 	struct command *cmd_p;
 	int argc;
-	char **argv;
+	const char **argv;
 
 	if (access(update_post_hook, X_OK) < 0)
 		return;
@@ -190,10 +190,12 @@ static void run_update_post_hook(struct command *cmd)
 	argv[0] = update_post_hook;
 
 	for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
+		char *p;
 		if (cmd_p->error_string)
 			continue;
-		argv[argc] = xmalloc(strlen(cmd_p->ref_name) + 1);
+		p = xmalloc(strlen(cmd_p->ref_name) + 1);
-		strcpy(argv[argc], cmd_p->ref_name);
+		strcpy(p, cmd_p->ref_name);
+		argv[argc] = p;
 		argc++;
 	}
 	argv[argc] = NULL;

run-command.c

@@ -3,7 +3,7 @@
 #include <sys/wait.h>
 #include "exec_cmd.h"
 
-int run_command_v_opt(int argc, char **argv, int flags)
+int run_command_v_opt(int argc, const char **argv, int flags)
 {
 	pid_t pid = fork();
 
@@ -47,7 +47,7 @@ int run_command_v_opt(int argc, char **argv, int flags)
 	}
 }
 
-int run_command_v(int argc, char **argv)
+int run_command_v(int argc, const char **argv)
 {
 	return run_command_v_opt(argc, argv, 0);
 }
@@ -55,7 +55,7 @@ int run_command_v(int argc, char **argv)
 int run_command(const char *cmd, ...)
 {
 	int argc;
-	char *argv[MAX_RUN_COMMAND_ARGS];
+	const char *argv[MAX_RUN_COMMAND_ARGS];
 	const char *arg;
 	va_list param;
 

run-command.h

@@ -13,8 +13,8 @@ enum {
 
 #define RUN_COMMAND_NO_STDIO 1
 #define RUN_GIT_CMD	     2	/*If this is to be git sub-command */
-int run_command_v_opt(int argc, char **argv, int opt);
+int run_command_v_opt(int argc, const char **argv, int opt);
-int run_command_v(int argc, char **argv);
+int run_command_v(int argc, const char **argv);
 int run_command(const char *cmd, ...);
 
 #endif

send-pack.c

@@ -27,7 +27,7 @@ static int is_zero_sha1(const unsigned char *sha1)
 
 static void exec_pack_objects(void)
 {
-	static char *args[] = {
+	static const char *args[] = {
 		"pack-objects",
 		"--stdout",
 		NULL
@@ -39,7 +39,7 @@ static void exec_pack_objects(void)
 static void exec_rev_list(struct ref *refs)
 {
 	struct ref *ref;
-	static char *args[1000];
+	static const char *args[1000];
 	int i = 0, j;
 
 	args[i++] = "rev-list";	/* 0 */

shell.c

@@ -15,7 +15,7 @@ static int do_generic_cmd(const char *me, char *arg)
 	my_argv[1] = arg;
 	my_argv[2] = NULL;
 
-	return execv_git_cmd((char**) my_argv);
+	return execv_git_cmd(my_argv);
 }
 
 static struct commands {

upload-pack.c

@@ -46,7 +46,7 @@ static void create_pack_file(void)
 	if (!pid) {
 		int i;
 		int args;
-		char **argv;
+		const char **argv;
 		char *buf;
 		char **p;
 
@@ -56,9 +56,9 @@ static void create_pack_file(void)
 		}
 		else
 			args = nr_has + nr_needs + 5;
-		argv = xmalloc(args * sizeof(char *));
+		p = xmalloc(args * sizeof(char *));
+		argv = (const char **) p;
 		buf = xmalloc(args * 45);
-		p = argv;
 
 		dup2(fd[1], 1);
 		close(0);