Re: [PATCH v2 3/3] archive: support remote archive from stateless transport

[Phillip Wood <phillip.wood123@gmail.com>]

On 23/09/2023 16:22, Jiang Xin wrote:
> From: Jiang Xin <zhiyou.jx@alibaba-inc.com>
> 
> Even though we can establish a stateless connection, we still cannot
> archive the remote repository using a stateless HTTP protocol. Try the
> following steps to make it work.
> 
>   1. Add support for "git-upload-archive" service in "http-backend".
> 
>   2. Use the URL ".../info/refs?service=git-upload-pack" to detect the
>      protocol version, instead of use the "git-upload-archive" service.
> 
>   3. "git-archive" does not expect to see protocol version and
>      capabilities when connecting to remote-helper, so do not send them
>      in "remote-curl.c" for the "git-upload-archive" service.

I'm not familiar enough with the server side of git to comment on 
whether this patch is a good idea, but I did notice one C language issue 
below.

>   static struct string_list *get_parameters(void)
> @@ -639,10 +640,19 @@ static void check_content_type(struct strbuf *hdr, const char *accepted_type)
>   
>   static void service_rpc(struct strbuf *hdr, char *service_name)
>   {
> -	const char *argv[] = {NULL, "--stateless-rpc", ".", NULL};

In the pre-image argv[0] is initialized to NULL

> +	const char *argv[4];

In the post-image argv is not initialized and the first element is not 
set in the code below.

>   	struct rpc_service *svc = select_service(hdr, service_name);
>   	struct strbuf buf = STRBUF_INIT;
>   
> +	if (!strcmp(service_name, "git-upload-archive")) {
> +		argv[1] = ".";
> +		argv[2] = NULL;
> +	} else {
> +		argv[1] = "--stateless-rpc";
> +		argv[2] = ".";
> +		argv[3] = NULL;
> +	}

Best Wishes

Phillip