convert manual allocations to argv_array

There are many manual argv allocations that predate the
argv_array API. Switching to that API brings a few
advantages:

  1. We no longer have to manually compute the correct final
     array size (so it's one less thing we can screw up).

  2. In many cases we had to make a separate pass to count,
     then allocate, then fill in the array. Now we can do it
     in one pass, making the code shorter and easier to
     follow.

  3. argv_array handles memory ownership for us, making it
     more obvious when things should be free()d and and when
     not.

Most of these cases are pretty straightforward. In some, we
switch from "run_command_v" to "run_command" which lets us
directly use the argv_array embedded in "struct
child_process".

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

1 files changed, 5 insertions, 21 deletions

diff --git a/builtin/remote-ext.c b/builtin/remote-ext.c
index e3cd25d580..7457c743e8 100644
--- a/builtin/remote-ext.c
+++ b/builtin/remote-ext.c
@@ -114,30 +114,14 @@ static char *strip_escapes(const char *str, const char *service,
 	}
 }
 
-/* Should be enough... */
-#define MAXARGUMENTS 256
-
-static const char **parse_argv(const char *arg, const char *service)
+static void parse_argv(struct argv_array *out, const char *arg, const char *service)
 {
-	int arguments = 0;
-	int i;
-	const char **ret;
-	char *temparray[MAXARGUMENTS + 1];
-
 	while (*arg) {
-		char *expanded;
-		if (arguments == MAXARGUMENTS)
-			die("remote-ext command has too many arguments");
-		expanded = strip_escapes(arg, service, &arg);
+		char *expanded = strip_escapes(arg, service, &arg);
 		if (expanded)
-			temparray[arguments++] = expanded;
+			argv_array_push(out, expanded);
+		free(expanded);
 	}
-
-	ret = xmalloc((arguments + 1) * sizeof(char *));
-	for (i = 0; i < arguments; i++)
-		ret[i] = temparray[i];
-	ret[arguments] = NULL;
-	return ret;
 }
 
 static void send_git_request(int stdin_fd, const char *serv, const char *repo,
@@ -158,7 +142,7 @@ static int run_child(const char *arg, const char *service)
 	child.in = -1;
 	child.out = -1;
 	child.err = 0;
-	child.argv = parse_argv(arg, service);
+	parse_argv(&child.args, arg, service);
 
 	if (start_command(&child) < 0)
 		die("Can't run specified command");