static int open_object_dir_tmp(const char *path)
{
snprintf(tmpname, sizeof(tmpname), "%s/%s", get_object_directory(), path);
- return mkstemp(tmpname);
+ return xmkstemp(tmpname);
}
/* forward declaration for write_pack_file */
f = sha1fd(1, "<stdout>");
} else {
int fd = open_object_dir_tmp("tmp_pack_XXXXXX");
- if (fd < 0)
- die("unable to create %s: %s\n", tmpname, strerror(errno));
pack_tmp_name = xstrdup(tmpname);
f = sha1fd(fd, pack_tmp_name);
}
int cmp;
while (tree_entry(tree,&entry)) {
+ if (S_ISGITLINK(entry.mode))
+ continue;
cmp = tree_entry_len(entry.path, entry.sha1) != cmplen ? 1 :
memcmp(name, entry.path, cmplen);
if (cmp > 0)
unsigned depth;
};
-static int delta_cacheable(struct unpacked *trg, struct unpacked *src,
- unsigned long src_size, unsigned long trg_size,
- unsigned long delta_size)
+static int delta_cacheable(unsigned long src_size, unsigned long trg_size,
+ unsigned long delta_size)
{
if (max_delta_cache_size && delta_cache_size + delta_size > max_delta_cache_size)
return 0;
if (trg_entry->type != src_entry->type)
return -1;
- /* We do not compute delta to *create* objects we are not
- * going to pack.
- */
- if (trg_entry->preferred_base)
- return -1;
-
/*
* We do not bother to try a delta that we discarded
* on an earlier try, but only when reusing delta data.
/* Load data if not already done */
if (!trg->data) {
trg->data = read_sha1_file(trg_entry->idx.sha1, &type, &sz);
+ if (!trg->data)
+ die("object %s cannot be read",
+ sha1_to_hex(trg_entry->idx.sha1));
if (sz != trg_size)
die("object %s inconsistent object length (%lu vs %lu)",
sha1_to_hex(trg_entry->idx.sha1), sz, trg_size);
}
if (!src->data) {
src->data = read_sha1_file(src_entry->idx.sha1, &type, &sz);
+ if (!src->data)
+ die("object %s cannot be read",
+ sha1_to_hex(src_entry->idx.sha1));
if (sz != src_size)
die("object %s inconsistent object length (%lu vs %lu)",
sha1_to_hex(src_entry->idx.sha1), sz, src_size);
if (!delta_buf)
return 0;
- if (trg_entry->delta_data) {
+ if (trg_entry->delta) {
/* Prefer only shallower same-sized deltas. */
if (delta_size == trg_entry->delta_size &&
src->depth + 1 >= trg->depth) {
free(delta_buf);
return 0;
}
- delta_cache_size -= trg_entry->delta_size;
- free(trg_entry->delta_data);
- trg_entry->delta_data = NULL;
}
+
trg_entry->delta = src_entry;
trg_entry->delta_size = delta_size;
trg->depth = src->depth + 1;
- if (delta_cacheable(src, trg, src_size, trg_size, delta_size)) {
+ if (trg_entry->delta_data) {
+ delta_cache_size -= trg_entry->delta_size;
+ free(trg_entry->delta_data);
+ trg_entry->delta_data = NULL;
+ }
+
+ if (delta_cacheable(src_size, trg_size, delta_size)) {
trg_entry->delta_data = xrealloc(delta_buf, delta_size);
delta_cache_size += trg_entry->delta_size;
} else
n->depth = 0;
}
-static void find_deltas(struct object_entry **list, int window, int depth)
+static void find_deltas(struct object_entry **list, unsigned list_size,
+ unsigned nr_deltas, int window, int depth)
{
- uint32_t i = nr_objects, idx = 0, count = 0, processed = 0;
+ uint32_t i = list_size, idx = 0, count = 0, processed = 0;
unsigned int array_size = window * sizeof(struct unpacked);
struct unpacked *array;
int max_depth;
- if (!nr_objects)
- return;
array = xmalloc(array_size);
memset(array, 0, array_size);
if (progress)
- start_progress(&progress_state, "Deltifying %u objects...", "", nr_result);
+ start_progress(&progress_state, "Deltifying %u objects...", "", nr_deltas);
do {
struct object_entry *entry = list[--i];
struct unpacked *n = array + idx;
- int j;
-
- if (!entry->preferred_base)
- processed++;
-
- if (progress)
- display_progress(&progress_state, processed);
-
- if (entry->delta)
- /* This happens if we decided to reuse existing
- * delta from a pack. "!no_reuse_delta &&" is implied.
- */
- continue;
-
- if (entry->size < 50)
- continue;
-
- if (entry->no_try_delta)
- continue;
+ int j, best_base = -1;
free_unpacked(n);
n->entry = entry;
count--;
}
+ /* We do not compute delta to *create* objects we are not
+ * going to pack.
+ */
+ if (entry->preferred_base)
+ goto next;
+
+ if (progress)
+ display_progress(&progress_state, ++processed);
+
/*
* If the current object is at pack edge, take the depth the
* objects that depend on the current object into account
j = window;
while (--j > 0) {
+ int ret;
uint32_t other_idx = idx + j;
struct unpacked *m;
if (other_idx >= window)
m = array + other_idx;
if (!m->entry)
break;
- if (try_delta(n, m, max_depth) < 0)
+ ret = try_delta(n, m, max_depth);
+ if (ret < 0)
break;
+ else if (ret > 0)
+ best_base = other_idx;
}
/* if we made n a delta, and if n is already at max
if (entry->delta && depth <= n->depth)
continue;
+ /*
+ * Move the best delta base up in the window, after the
+ * currently deltified object, to keep it longer. It will
+ * be the first base object to be attempted next.
+ */
+ if (entry->delta) {
+ struct unpacked swap = array[best_base];
+ int dist = (window + idx - best_base) % window;
+ int dst = best_base;
+ while (dist--) {
+ int src = (dst + 1) % window;
+ array[dst] = array[src];
+ dst = src;
+ }
+ array[dst] = swap;
+ }
+
next:
idx++;
if (count + 1 < window)
static void prepare_pack(int window, int depth)
{
struct object_entry **delta_list;
- uint32_t i;
+ uint32_t i, n, nr_deltas;
get_object_details();
- if (!window || !depth)
+ if (!nr_objects || !window || !depth)
return;
delta_list = xmalloc(nr_objects * sizeof(*delta_list));
- for (i = 0; i < nr_objects; i++)
- delta_list[i] = objects + i;
- qsort(delta_list, nr_objects, sizeof(*delta_list), type_size_sort);
- find_deltas(delta_list, window+1, depth);
+ nr_deltas = n = 0;
+
+ for (i = 0; i < nr_objects; i++) {
+ struct object_entry *entry = objects + i;
+
+ if (entry->delta)
+ /* This happens if we decided to reuse existing
+ * delta from a pack. "!no_reuse_delta &&" is implied.
+ */
+ continue;
+
+ if (entry->size < 50)
+ continue;
+
+ if (entry->no_try_delta)
+ continue;
+
+ if (!entry->preferred_base)
+ nr_deltas++;
+
+ delta_list[n++] = entry;
+ }
+
+ if (nr_deltas) {
+ qsort(delta_list, n, sizeof(*delta_list), type_size_sort);
+ find_deltas(delta_list, n, nr_deltas, window+1, depth);
+ }
free(delta_list);
}