We don't need special code for showing added/removed subtree, because we
can do the same via diff_tree_sha1, just passing NULL for absent tree.
And compared to show_tree(), which was calling show_entry() for every
tree entry, that would lead to the same show_entry() callings:
show_tree(t):
for e in t.entries:
show_entry(e)
diff_tree_sha1(NULL, new): /* the same applies to (old, NULL) */
diff_tree(t1=NULL, t2)
...
if (!t1->size)
show_entry(t2)
...
and possible overhead is negligible, since after the patch, timing for
`git log --raw --no-abbrev --no-renames`
for navy.git and `linux.git v3.10..v3.11` is practically the same.
So let's say goodbye to show_tree() - it removes some code, but also,
and what is important, consolidates more code for showing/recursing into
trees into one place.
Signed-off-by: Kirill Smelkov <kirr@xxxxxxxxxx>
---
( re-posting without change )
tree-diff.c | 35 +++--------------------------------
1 file changed, 3 insertions(+), 32 deletions(-)
diff --git a/tree-diff.c b/tree-diff.c
index a8c2aec..2ad7788 100644
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -55,25 +55,7 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2,
return 0;
}
-/* A whole sub-tree went away or appeared */
-static void show_tree(struct diff_options *opt, const char *prefix,
- struct tree_desc *desc, struct strbuf *base)
-{
- enum interesting match = entry_not_interesting;
- for (; desc->size; update_tree_entry(desc)) {
- if (match != all_entries_interesting) {
- match = tree_entry_interesting(&desc->entry, base, 0,
- &opt->pathspec);
- if (match == all_entries_not_interesting)
- break;
- if (match == entry_not_interesting)
- continue;
- }
- show_entry(opt, prefix, desc, base);
- }
-}
-
-/* A file entry went away or appeared */
+/* An entry went away or appeared */
static void show_entry(struct diff_options *opt, const char *prefix,
struct tree_desc *desc, struct strbuf *base)
{
@@ -85,23 +67,12 @@ static void show_entry(struct diff_options *opt, const char *prefix,
strbuf_add(base, path, pathlen);
if (DIFF_OPT_TST(opt, RECURSIVE) && S_ISDIR(mode)) {
- enum object_type type;
- struct tree_desc inner;
- void *tree;
- unsigned long size;
-
- tree = read_sha1_file(sha1, &type, &size);
- if (!tree || type != OBJ_TREE)
- die("corrupt tree sha %s", sha1_to_hex(sha1));
-
if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE))
opt->add_remove(opt, *prefix, mode, sha1, 1, base->buf, 0);
strbuf_addch(base, '/');
-
- init_tree_desc(&inner, tree, size);
- show_tree(opt, prefix, &inner, base);
- free(tree);
+ diff_tree_sha1(*prefix == '-' ? sha1 : NULL,
+ *prefix == '+' ? sha1 : NULL, base->buf, opt);
} else
opt->add_remove(opt, prefix[0], mode, sha1, 1, base->buf, 0);
--
1.9.rc1.181.g641f458
--
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