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unpack_trees(): allow callers to differentiate worktree errors from merge errors

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Instead of uniformly returning -1 on any error, this teaches
unpack_trees() to return -2 when the merge itself is Ok but worktree
refuses to get updated.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2008-05-28 15:12:30 -07:00
parent 6286a08db3
commit 2e2b887d1c
1 changed files with 7 additions and 3 deletions
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10
unpack-trees.c
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@ -358,8 +358,13 @@ static int unpack_failed(struct unpack_trees_options *o, const char *message)
return -1;
}
/*
* N-way merge "len" trees. Returns 0 on success, -1 on failure to manipulate the
* resulting index, -2 on failure to reflect the changes to the work tree.
*/
int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o)
{
int ret;
static struct cache_entry *dfc;
if (len > MAX_UNPACK_TREES)
@ -404,11 +409,10 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
return unpack_failed(o, "Merge requires file-level merging");
o->src_index = NULL;
if (check_updates(o))
return -1;
ret = check_updates(o) ? (-2) : 0;
if (o->dst_index)
*o->dst_index = o->result;
return 0;
return ret;
}
/* Here come the merge functions */