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cache-tree: fix writing cache-tree when CE_REMOVE is present

entry_count is used in update_one() for two purposes:

1. to skip through the number of processed entries in in-memory index
2. to record the number of entries this cache-tree covers on disk

Unfortunately when CE_REMOVE is present these numbers are not the same
because CE_REMOVE entries are automatically removed before writing to
disk but entry_count is not adjusted and still counts CE_REMOVE
entries.

Separate the two use cases into two different variables. #1 is taken
care by the new field count in struct cache_tree_sub and entry_count
is prepared for #2.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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1 parent 386cc8b commit 3cf773e4264ecc6e9f603a24aeb72cc68b372f96 @pclouds pclouds committed with gitster Dec 16, 2012
Showing with 24 additions and 7 deletions.
  1. +23 −7 cache-tree.c
  2. +1 −0 cache-tree.h
View
30 cache-tree.c
@@ -238,13 +238,16 @@ static int update_one(struct cache_tree *it,
int entries,
const char *base,
int baselen,
+ int *skip_count,
int flags)
{
struct strbuf buffer;
int missing_ok = flags & WRITE_TREE_MISSING_OK;
int dryrun = flags & WRITE_TREE_DRY_RUN;
int i;
+ *skip_count = 0;
+
if (0 <= it->entry_count && has_sha1_file(it->sha1))
return it->entry_count;
@@ -264,7 +267,7 @@ static int update_one(struct cache_tree *it,
struct cache_entry *ce = cache[i];
struct cache_tree_sub *sub;
const char *path, *slash;
- int pathlen, sublen, subcnt;
+ int pathlen, sublen, subcnt, subskip;
path = ce->name;
pathlen = ce_namelen(ce);
@@ -289,10 +292,13 @@ static int update_one(struct cache_tree *it,
cache + i, entries - i,
path,
baselen + sublen + 1,
+ &subskip,
flags);
if (subcnt < 0)
return subcnt;
i += subcnt;
+ sub->count = subcnt; /* to be used in the next loop */
+ *skip_count += subskip;
sub->used = 1;
}
@@ -324,7 +330,7 @@ static int update_one(struct cache_tree *it,
if (!sub)
die("cache-tree.c: '%.*s' in '%s' not found",
entlen, path + baselen, path);
- i += sub->cache_tree->entry_count;
+ i += sub->count;
sha1 = sub->cache_tree->sha1;
mode = S_IFDIR;
}
@@ -340,8 +346,18 @@ static int update_one(struct cache_tree *it,
mode, sha1_to_hex(sha1), entlen+baselen, path);
}
- if (ce->ce_flags & (CE_REMOVE | CE_INTENT_TO_ADD))
- continue; /* entry being removed or placeholder */
+ /*
+ * CE_REMOVE entries are removed before the index is
+ * written to disk. Skip them to remain consistent
+ * with the future on-disk index.
+ */
+ if (ce->ce_flags & CE_REMOVE) {
+ *skip_count = *skip_count + 1;
+ continue;
+ }
+
+ if (ce->ce_flags & CE_INTENT_TO_ADD)
+ continue;
strbuf_grow(&buffer, entlen + 100);
strbuf_addf(&buffer, "%o %.*s%c", mode, entlen, path + baselen, '\0');
@@ -361,7 +377,7 @@ static int update_one(struct cache_tree *it,
}
strbuf_release(&buffer);
- it->entry_count = i;
+ it->entry_count = i - *skip_count;
#if DEBUG
fprintf(stderr, "cache-tree update-one (%d ent, %d subtree) %s\n",
it->entry_count, it->subtree_nr,
@@ -375,11 +391,11 @@ int cache_tree_update(struct cache_tree *it,
int entries,
int flags)
{
- int i;
+ int i, skip;
i = verify_cache(cache, entries, flags);
if (i)
return i;
- i = update_one(it, cache, entries, "", 0, flags);
+ i = update_one(it, cache, entries, "", 0, &skip, flags);
if (i < 0)
return i;
return 0;
View
1 cache-tree.h
@@ -7,6 +7,7 @@
struct cache_tree;
struct cache_tree_sub {
struct cache_tree *cache_tree;
+ int count; /* internally used by update_one() */
int namelen;
int used;
char name[FLEX_ARRAY];

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