[PATCH 0/3] http*: refactor fetching code (v2)

This patch series applies on pu.

The major differences between this series and the 11-patch long one (dated May 15, 2009) are:

 *check 'preq' pointer before using it (for fetching packs) [1]
 *moved free(url) before 'abort' label to stop -Wuninitialized warning
  (for fetching loose objects) [2]
 *use unlink_or_warn, after 691f1a2 ("replace direct calls to unlink
  (2) with unlink_or_warn")

Junio: I've rebased the patch series on pu, hopefully this stops the
attribute warnings for patch 3.

Tay Ray Chuan (3):
  http*: add helper methods for fetching packs
  http*: add helper methods for fetching objects/info/packs
  http*: add helper methods for fetching objects (loose)

 http-push.c   |  378 ++++++++--------------------------------------------
 http-walker.c |  407 +++++++++++---------------------------------------------
 http.c        |  415 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 http.h        |   72 ++++++++++-
 4 files changed, 616 insertions(+), 656 deletions(-)

Footnotes:
[1] @@ -595,17 +595,21 @@ static void finish_request(struct transfer_request *request)
     			start_fetch_packed(request);
     
     	} else if (request->state == RUN_FETCH_PACKED) {
    +		int fail = 1;
     		if (request->curl_result != CURLE_OK) {
     			fprintf(stderr, "Unable to get pack file %s\n%s",
     				request->url, curl_errorstr);
    -			repo->can_update_info_refs = 0;
     		} else {
     			preq = (struct http_pack_request *)request->userData;
     
    -			if (finish_http_pack_request(preq))
    -				repo->can_update_info_refs = 0;
    +			if (preq) {
    +				if (finish_http_pack_request(preq) > 0)
    +					fail = 0;
    +				release_http_pack_request(preq);
    +			}
     		}
    -		release_http_pack_request(preq);
    +		if (fail)
    +			repo->can_update_info_refs = 0;
     		release_request(request);
     	}
     }
    
[2] @@ -1167,9 +1167,9 @@ struct http_object_request
    *new_http_object_request(const char *base_url, 
     	return freq;
     
    +	free(url);
     abort:
     	free(filename);
    -	free(url);
     	free(freq);
     	return NULL;
     }