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-rw-r--r--builtin/pack-objects.c160
1 files changed, 149 insertions, 11 deletions
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index c6e2d8766b..a9c67c18ba 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -51,6 +51,8 @@ struct object_entry {
* objects against.
*/
unsigned char no_try_delta;
+ unsigned char tagged; /* near the very tip of refs */
+ unsigned char filled; /* assigned write-order */
};
/*
@@ -70,6 +72,7 @@ static int local;
static int incremental;
static int ignore_packed_keep;
static int allow_ofs_delta;
+static struct pack_idx_option pack_idx_opts;
static const char *base_name;
static int progress = 1;
static int window = 10;
@@ -95,6 +98,7 @@ static unsigned long window_memory_limit = 0;
*/
static int *object_ix;
static int object_ix_hashsz;
+static struct object_entry *locate_object_entry(const unsigned char *sha1);
/*
* stats
@@ -199,6 +203,7 @@ static void copy_pack_data(struct sha1file *f,
}
}
+/* Return 0 if we will bust the pack-size limit */
static unsigned long write_object(struct sha1file *f,
struct object_entry *entry,
off_t write_offset)
@@ -433,6 +438,134 @@ static int write_one(struct sha1file *f,
return 1;
}
+static int mark_tagged(const char *path, const unsigned char *sha1, int flag,
+ void *cb_data)
+{
+ unsigned char peeled[20];
+ struct object_entry *entry = locate_object_entry(sha1);
+
+ if (entry)
+ entry->tagged = 1;
+ if (!peel_ref(path, peeled)) {
+ entry = locate_object_entry(peeled);
+ if (entry)
+ entry->tagged = 1;
+ }
+ return 0;
+}
+
+static void add_to_write_order(struct object_entry **wo,
+ int *endp,
+ struct object_entry *e)
+{
+ if (e->filled)
+ return;
+ wo[(*endp)++] = e;
+ e->filled = 1;
+}
+
+static void add_descendants_to_write_order(struct object_entry **wo,
+ int *endp,
+ struct object_entry *e)
+{
+ struct object_entry *child;
+
+ for (child = e->delta_child; child; child = child->delta_sibling)
+ add_to_write_order(wo, endp, child);
+ for (child = e->delta_child; child; child = child->delta_sibling)
+ add_descendants_to_write_order(wo, endp, child);
+}
+
+static void add_family_to_write_order(struct object_entry **wo,
+ int *endp,
+ struct object_entry *e)
+{
+ struct object_entry *root;
+
+ for (root = e; root->delta; root = root->delta)
+ ; /* nothing */
+ add_to_write_order(wo, endp, root);
+ add_descendants_to_write_order(wo, endp, root);
+}
+
+static struct object_entry **compute_write_order(void)
+{
+ int i, wo_end;
+
+ struct object_entry **wo = xmalloc(nr_objects * sizeof(*wo));
+
+ for (i = 0; i < nr_objects; i++) {
+ objects[i].tagged = 0;
+ objects[i].filled = 0;
+ objects[i].delta_child = NULL;
+ objects[i].delta_sibling = NULL;
+ }
+
+ /*
+ * Fully connect delta_child/delta_sibling network.
+ * Make sure delta_sibling is sorted in the original
+ * recency order.
+ */
+ for (i = nr_objects - 1; 0 <= i; i--) {
+ struct object_entry *e = &objects[i];
+ if (!e->delta)
+ continue;
+ /* Mark me as the first child */
+ e->delta_sibling = e->delta->delta_child;
+ e->delta->delta_child = e;
+ }
+
+ /*
+ * Mark objects that are at the tip of tags.
+ */
+ for_each_tag_ref(mark_tagged, NULL);
+
+ /*
+ * Give the commits in the original recency order until
+ * we see a tagged tip.
+ */
+ for (i = wo_end = 0; i < nr_objects; i++) {
+ if (objects[i].tagged)
+ break;
+ add_to_write_order(wo, &wo_end, &objects[i]);
+ }
+
+ /*
+ * Then fill all the tagged tips.
+ */
+ for (; i < nr_objects; i++) {
+ if (objects[i].tagged)
+ add_to_write_order(wo, &wo_end, &objects[i]);
+ }
+
+ /*
+ * And then all remaining commits and tags.
+ */
+ for (i = 0; i < nr_objects; i++) {
+ if (objects[i].type != OBJ_COMMIT &&
+ objects[i].type != OBJ_TAG)
+ continue;
+ add_to_write_order(wo, &wo_end, &objects[i]);
+ }
+
+ /*
+ * And then all the trees.
+ */
+ for (i = 0; i < nr_objects; i++) {
+ if (objects[i].type != OBJ_TREE)
+ continue;
+ add_to_write_order(wo, &wo_end, &objects[i]);
+ }
+
+ /*
+ * Finally all the rest in really tight order
+ */
+ for (i = 0; i < nr_objects; i++)
+ add_family_to_write_order(wo, &wo_end, &objects[i]);
+
+ return wo;
+}
+
static void write_pack_file(void)
{
uint32_t i = 0, j;
@@ -441,10 +574,12 @@ static void write_pack_file(void)
struct pack_header hdr;
uint32_t nr_remaining = nr_result;
time_t last_mtime = 0;
+ struct object_entry **write_order;
if (progress > pack_to_stdout)
progress_state = start_progress("Writing objects", nr_result);
written_list = xmalloc(nr_objects * sizeof(*written_list));
+ write_order = compute_write_order();
do {
unsigned char sha1[20];
@@ -468,7 +603,8 @@ static void write_pack_file(void)
offset = sizeof(hdr);
nr_written = 0;
for (; i < nr_objects; i++) {
- if (!write_one(f, objects + i, &offset))
+ struct object_entry *e = write_order[i];
+ if (!write_one(f, e, &offset))
break;
display_progress(progress_state, written);
}
@@ -493,8 +629,8 @@ static void write_pack_file(void)
const char *idx_tmp_name;
char tmpname[PATH_MAX];
- idx_tmp_name = write_idx_file(NULL, written_list,
- nr_written, sha1);
+ idx_tmp_name = write_idx_file(NULL, written_list, nr_written,
+ &pack_idx_opts, sha1);
snprintf(tmpname, sizeof(tmpname), "%s-%s.pack",
base_name, sha1_to_hex(sha1));
@@ -545,6 +681,7 @@ static void write_pack_file(void)
} while (nr_remaining && i < nr_objects);
free(written_list);
+ free(write_order);
stop_progress(&progress_state);
if (written != nr_result)
die("wrote %"PRIu32" objects while expecting %"PRIu32,
@@ -633,7 +770,7 @@ static int no_try_delta(const char *path)
struct git_attr_check check[1];
setup_delta_attr_check(check);
- if (git_checkattr(path, ARRAY_SIZE(check), check))
+ if (git_check_attr(path, ARRAY_SIZE(check), check))
return 0;
if (ATTR_FALSE(check->value))
return 1;
@@ -1884,10 +2021,10 @@ static int git_pack_config(const char *k, const char *v, void *cb)
return 0;
}
if (!strcmp(k, "pack.indexversion")) {
- pack_idx_default_version = git_config_int(k, v);
- if (pack_idx_default_version > 2)
+ pack_idx_opts.version = git_config_int(k, v);
+ if (pack_idx_opts.version > 2)
die("bad pack.indexversion=%"PRIu32,
- pack_idx_default_version);
+ pack_idx_opts.version);
return 0;
}
if (!strcmp(k, "pack.packsizelimit")) {
@@ -2134,6 +2271,7 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
rp_av[1] = "--objects"; /* --thin will make it --objects-edge */
rp_ac = 2;
+ reset_pack_idx_option(&pack_idx_opts);
git_config(git_pack_config, NULL);
if (!pack_compression_seen && core_compression_seen)
pack_compression_level = core_compression_level;
@@ -2278,12 +2416,12 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
}
if (!prefixcmp(arg, "--index-version=")) {
char *c;
- pack_idx_default_version = strtoul(arg + 16, &c, 10);
- if (pack_idx_default_version > 2)
+ pack_idx_opts.version = strtoul(arg + 16, &c, 10);
+ if (pack_idx_opts.version > 2)
die("bad %s", arg);
if (*c == ',')
- pack_idx_off32_limit = strtoul(c+1, &c, 0);
- if (*c || pack_idx_off32_limit & 0x80000000)
+ pack_idx_opts.off32_limit = strtoul(c+1, &c, 0);
+ if (*c || pack_idx_opts.off32_limit & 0x80000000)
die("bad %s", arg);
continue;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 18:55:05 +0000