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diff-lib: refactor run_diff_index() and do_diff_cache() 

The latter is meant to be an API for internal callers that want to inspect
the resulting diff-queue, while the former is an implementation of "git
diff-index" command. Extract the common logic into a single helper
function and make them thin wrappers around it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2011-07-13 18:57:42 -07:00
parent fe549c21fc
commit bf979c07c7
1 changed files with 19 additions and 28 deletions
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47
diff-lib.c
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@ -440,20 +440,19 @@ static int oneway_diff(struct cache_entry **src, struct unpack_trees_options *o)
return 0;
}
int run_diff_index(struct rev_info *revs, int cached)
static int diff_cache(struct rev_info *revs,
const unsigned char *tree_sha1,
const char *tree_name,
int cached)
{
struct object *ent;
struct tree *tree;
const char *tree_name;
struct unpack_trees_options opts;
struct tree_desc t;
struct unpack_trees_options opts;
ent = revs->pending.objects[0].item;
tree_name = revs->pending.objects[0].name;
tree = parse_tree_indirect(ent->sha1);
tree = parse_tree_indirect(tree_sha1);
if (!tree)
return error("bad tree object %s", tree_name);
return error("bad tree object %s",
tree_name ? tree_name : sha1_to_hex(tree_sha1));
memset(&opts, 0, sizeof(opts));
opts.head_idx = 1;
opts.index_only = cached;
@ -466,7 +465,15 @@ int run_diff_index(struct rev_info *revs, int cached)
opts.dst_index = NULL;
init_tree_desc(&t, tree->buffer, tree->size);
if (unpack_trees(1, &t, &opts))
return unpack_trees(1, &t, &opts);
}
int run_diff_index(struct rev_info *revs, int cached)
{
struct object_array_entry *ent;
ent = revs->pending.objects;
if (diff_cache(revs, ent->item->sha1, ent->name, cached))
exit(128);
diff_set_mnemonic_prefix(&revs->diffopt, "c/", cached ? "i/" : "w/");
@ -478,29 +485,13 @@ int run_diff_index(struct rev_info *revs, int cached)
int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
{
struct tree *tree;
struct rev_info revs;
struct unpack_trees_options opts;
struct tree_desc t;
init_revisions(&revs, NULL);
init_pathspec(&revs.prune_data, opt->pathspec.raw);
tree = parse_tree_indirect(tree_sha1);
if (!tree)
die("bad tree object %s", sha1_to_hex(tree_sha1));
revs.diffopt = *opt;
memset(&opts, 0, sizeof(opts));
opts.head_idx = 1;
opts.index_only = 1;
opts.diff_index_cached = !DIFF_OPT_TST(opt, FIND_COPIES_HARDER);
opts.merge = 1;
opts.fn = oneway_diff;
opts.unpack_data = &revs;
opts.src_index = &the_index;
opts.dst_index = NULL;
init_tree_desc(&t, tree->buffer, tree->size);
if (unpack_trees(1, &t, &opts))
if (diff_cache(&revs, tree_sha1, NULL, 1))
exit(128);
return 0;
}