[PATCH] GSoC2014 Microproject rewrite finish_bulk_checkin()

[Faiz Kothari <faiz.off93@gmail.com>]

Signed-off-by: Faiz Kothari <faiz.off93@gmail.com>
---
 bulk-checkin.c |   12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/bulk-checkin.c b/bulk-checkin.c
index 118c625..feeff9f 100644
--- a/bulk-checkin.c
+++ b/bulk-checkin.c
@@ -23,7 +23,7 @@ static struct bulk_checkin_state {
 static void finish_bulk_checkin(struct bulk_checkin_state *state)
 {
 	unsigned char sha1[20];
-	char packname[PATH_MAX];
+	struct strbuf packname;
 	int i;
 
 	if (!state->f)
@@ -42,9 +42,11 @@ static void finish_bulk_checkin(struct bulk_checkin_state *state)
 					 state->offset);
 		close(fd);
 	}
-
-	sprintf(packname, "%s/pack/pack-", get_object_directory());
-	finish_tmp_packfile(packname, state->pack_tmp_name,
+	
+	packname.len = packname.alloc = 64 + strlen(get_object_directory());
+	packname.buf = (char *)malloc(packname.len * sizeof(char));
+	sprintf(packname.buf, "%s/pack/pack-", get_object_directory());
+	finish_tmp_packfile(packname.buf, state->pack_tmp_name,
 			    state->written, state->nr_written,
 			    &state->pack_idx_opts, sha1);
 	for (i = 0; i < state->nr_written; i++)
@@ -53,7 +55,7 @@ static void finish_bulk_checkin(struct bulk_checkin_state *state)
 clear_exit:
 	free(state->written);
 	memset(state, 0, sizeof(*state));
-
+	free(packname.buf);
 	/* Make objects we just wrote available to ourselves */
 	reprepare_packed_git();
 }
-- 
1.7.9.5

> Rewrite bulk-checkin.c:finish_bulk_checkin() to use a strbuf for handling packname, and explain why this is useful.
> Also check if the first argument of pack-write.c:finish_tmp_packfile() can be made const.

Adding 64 to strlen(get_object_directory()) to accomodate sha1_to_hex(sha1) and itself.
Using the APIs for strbuf is giving me test failures(12/15) during t1050-large.sh 
So, I used the malloc() and free() instead.
Instead of having packname on stack and cause stackoverflow because of MAX_PATH ~ 4KB, have it on heap.
Can have first parameter to pack-write.c:finish_tmp_packfile() as const because packname is not required to be modified.

I apologise for my two earlier patches not being in proper format. I have finally got it working properly. Will make sure,
it does not happen again.