#include "refs.h"
#include "streaming.h"
#include "thread-utils.h"
+#include "pack-bitmap.h"
static const char *pack_usage[] = {
N_("git pack-objects --stdout [options...] [< ref-list | < object-list]"),
static int pack_compression_level = Z_DEFAULT_COMPRESSION;
static int pack_compression_seen;
+static struct packed_git *reuse_packfile;
+static uint32_t reuse_packfile_objects;
+static off_t reuse_packfile_offset;
+
+static int use_bitmap_index = 1;
+static int write_bitmap_index;
+static uint16_t write_bitmap_options;
+
static unsigned long delta_cache_size = 0;
static unsigned long max_delta_cache_size = 256 * 1024 * 1024;
static unsigned long cache_max_small_delta_size = 1000;
static uint32_t written, written_delta;
static uint32_t reused, reused_delta;
+/*
+ * Indexed commits
+ */
+static struct commit **indexed_commits;
+static unsigned int indexed_commits_nr;
+static unsigned int indexed_commits_alloc;
+
+static void index_commit_for_bitmap(struct commit *commit)
+{
+ if (indexed_commits_nr >= indexed_commits_alloc) {
+ indexed_commits_alloc = (indexed_commits_alloc + 32) * 2;
+ indexed_commits = xrealloc(indexed_commits,
+ indexed_commits_alloc * sizeof(struct commit *));
+ }
+
+ indexed_commits[indexed_commits_nr++] = commit;
+}
+
static void *get_delta(struct object_entry *entry)
{
unsigned long size, base_size, delta_size;
return wo;
}
+static off_t write_reused_pack(struct sha1file *f)
+{
+ unsigned char buffer[8192];
+ off_t to_write, total;
+ int fd;
+
+ if (!is_pack_valid(reuse_packfile))
+ die("packfile is invalid: %s", reuse_packfile->pack_name);
+
+ fd = git_open_noatime(reuse_packfile->pack_name);
+ if (fd < 0)
+ die_errno("unable to open packfile for reuse: %s",
+ reuse_packfile->pack_name);
+
+ if (lseek(fd, sizeof(struct pack_header), SEEK_SET) == -1)
+ die_errno("unable to seek in reused packfile");
+
+ if (reuse_packfile_offset < 0)
+ reuse_packfile_offset = reuse_packfile->pack_size - 20;
+
+ total = to_write = reuse_packfile_offset - sizeof(struct pack_header);
+
+ while (to_write) {
+ int read_pack = xread(fd, buffer, sizeof(buffer));
+
+ if (read_pack <= 0)
+ die_errno("unable to read from reused packfile");
+
+ if (read_pack > to_write)
+ read_pack = to_write;
+
+ sha1write(f, buffer, read_pack);
+ to_write -= read_pack;
+
+ /*
+ * We don't know the actual number of objects written,
+ * only how many bytes written, how many bytes total, and
+ * how many objects total. So we can fake it by pretending all
+ * objects we are writing are the same size. This gives us a
+ * smooth progress meter, and at the end it matches the true
+ * answer.
+ */
+ written = reuse_packfile_objects *
+ (((double)(total - to_write)) / total);
+ display_progress(progress_state, written);
+ }
+
+ close(fd);
+ written = reuse_packfile_objects;
+ display_progress(progress_state, written);
+ return reuse_packfile_offset - sizeof(struct pack_header);
+}
+
static void write_pack_file(void)
{
uint32_t i = 0, j;
struct object_entry **write_order;
if (progress > pack_to_stdout)
- progress_state = start_progress("Writing objects", nr_result);
+ progress_state = start_progress(_("Writing objects"), nr_result);
written_list = xmalloc(to_pack.nr_objects * sizeof(*written_list));
write_order = compute_write_order();
f = create_tmp_packfile(&pack_tmp_name);
offset = write_pack_header(f, nr_remaining);
- if (!offset)
- die_errno("unable to write pack header");
+
+ if (reuse_packfile) {
+ off_t packfile_size;
+ assert(pack_to_stdout);
+
+ packfile_size = write_reused_pack(f);
+ offset += packfile_size;
+ }
+
nr_written = 0;
for (; i < to_pack.nr_objects; i++) {
struct object_entry *e = write_order[i];
if (!pack_to_stdout) {
struct stat st;
- char tmpname[PATH_MAX];
+ struct strbuf tmpname = STRBUF_INIT;
/*
* Packs are runtime accessed in their mtime
utb.modtime = --last_mtime;
if (utime(pack_tmp_name, &utb) < 0)
warning("failed utime() on %s: %s",
- tmpname, strerror(errno));
+ pack_tmp_name, strerror(errno));
}
- /* Enough space for "-<sha-1>.pack"? */
- if (sizeof(tmpname) <= strlen(base_name) + 50)
- die("pack base name '%s' too long", base_name);
- snprintf(tmpname, sizeof(tmpname), "%s-", base_name);
- finish_tmp_packfile(tmpname, pack_tmp_name,
+ strbuf_addf(&tmpname, "%s-", base_name);
+
+ if (write_bitmap_index) {
+ bitmap_writer_set_checksum(sha1);
+ bitmap_writer_build_type_index(written_list, nr_written);
+ }
+
+ finish_tmp_packfile(&tmpname, pack_tmp_name,
written_list, nr_written,
&pack_idx_opts, sha1);
+
+ if (write_bitmap_index) {
+ strbuf_addf(&tmpname, "%s.bitmap", sha1_to_hex(sha1));
+
+ stop_progress(&progress_state);
+
+ bitmap_writer_show_progress(progress);
+ bitmap_writer_reuse_bitmaps(&to_pack);
+ bitmap_writer_select_commits(indexed_commits, indexed_commits_nr, -1);
+ bitmap_writer_build(&to_pack);
+ bitmap_writer_finish(written_list, nr_written,
+ tmpname.buf, write_bitmap_options);
+ write_bitmap_index = 0;
+ }
+
+ strbuf_release(&tmpname);
free(pack_tmp_name);
puts(sha1_to_hex(sha1));
}
entry->no_try_delta = no_try_delta;
}
+static const char no_closure_warning[] = N_(
+"disabling bitmap writing, as some objects are not being packed"
+);
+
static int add_object_entry(const unsigned char *sha1, enum object_type type,
const char *name, int exclude)
{
if (have_duplicate_entry(sha1, exclude, &index_pos))
return 0;
- if (!want_object_in_pack(sha1, exclude, &found_pack, &found_offset))
+ if (!want_object_in_pack(sha1, exclude, &found_pack, &found_offset)) {
+ /* The pack is missing an object, so it will not have closure */
+ if (write_bitmap_index) {
+ warning(_(no_closure_warning));
+ write_bitmap_index = 0;
+ }
return 0;
+ }
create_object_entry(sha1, type, pack_name_hash(name),
exclude, name && no_try_delta(name),
index_pos, found_pack, found_offset);
- display_progress(progress_state, to_pack.nr_objects);
+ display_progress(progress_state, nr_result);
+ return 1;
+}
+
+static int add_object_entry_from_bitmap(const unsigned char *sha1,
+ enum object_type type,
+ int flags, uint32_t name_hash,
+ struct packed_git *pack, off_t offset)
+{
+ uint32_t index_pos;
+
+ if (have_duplicate_entry(sha1, 0, &index_pos))
+ return 0;
+
+ create_object_entry(sha1, type, name_hash, 0, 0, index_pos, pack, offset);
+
+ display_progress(progress_state, nr_result);
return 1;
}
static struct pbase_tree {
struct pbase_tree *next;
/* This is a phony "cache" entry; we are not
- * going to evict it nor find it through _get()
+ * going to evict it or find it through _get()
* mechanism -- this is for the toplevel node that
* would almost always change with any commit.
*/
if (0 <= pos)
return 1;
pos = -pos - 1;
- if (done_pbase_paths_alloc <= done_pbase_paths_num) {
- done_pbase_paths_alloc = alloc_nr(done_pbase_paths_alloc);
- done_pbase_paths = xrealloc(done_pbase_paths,
- done_pbase_paths_alloc *
- sizeof(unsigned));
- }
+ ALLOC_GROW(done_pbase_paths,
+ done_pbase_paths_num + 1,
+ done_pbase_paths_alloc);
done_pbase_paths_num++;
if (pos < done_pbase_paths_num)
memmove(done_pbase_paths + pos + 1,
{
unsigned char peeled[20];
- if (!prefixcmp(path, "refs/tags/") && /* is a tag? */
+ if (starts_with(path, "refs/tags/") && /* is a tag? */
!peel_ref(path, peeled) && /* peelable? */
packlist_find(&to_pack, peeled, NULL)) /* object packed? */
add_object_entry(sha1, OBJ_TAG, NULL, 0);
if (nr_deltas && n > 1) {
unsigned nr_done = 0;
if (progress)
- progress_state = start_progress("Compressing objects",
+ progress_state = start_progress(_("Compressing objects"),
nr_deltas);
qsort(delta_list, n, sizeof(*delta_list), type_size_sort);
ll_find_deltas(delta_list, n, window+1, depth, &nr_done);
cache_max_small_delta_size = git_config_int(k, v);
return 0;
}
+ if (!strcmp(k, "pack.writebitmaps")) {
+ write_bitmap_index = git_config_bool(k, v);
+ return 0;
+ }
+ if (!strcmp(k, "pack.writebitmaphashcache")) {
+ if (git_config_bool(k, v))
+ write_bitmap_options |= BITMAP_OPT_HASH_CACHE;
+ else
+ write_bitmap_options &= ~BITMAP_OPT_HASH_CACHE;
+ }
+ if (!strcmp(k, "pack.usebitmaps")) {
+ use_bitmap_index = git_config_bool(k, v);
+ return 0;
+ }
if (!strcmp(k, "pack.threads")) {
delta_search_threads = git_config_int(k, v);
if (delta_search_threads < 0)
{
add_object_entry(commit->object.sha1, OBJ_COMMIT, NULL, 0);
commit->object.flags |= OBJECT_ADDED;
+
+ if (write_bitmap_index)
+ index_commit_for_bitmap(commit);
}
static void show_object(struct object *obj,
}
}
+/*
+ * This tracks any options which a reader of the pack might
+ * not understand, and which would therefore prevent blind reuse
+ * of what we have on disk.
+ */
+static int pack_options_allow_reuse(void)
+{
+ return allow_ofs_delta;
+}
+
+static int get_object_list_from_bitmap(struct rev_info *revs)
+{
+ if (prepare_bitmap_walk(revs) < 0)
+ return -1;
+
+ if (pack_options_allow_reuse() &&
+ !reuse_partial_packfile_from_bitmap(
+ &reuse_packfile,
+ &reuse_packfile_objects,
+ &reuse_packfile_offset)) {
+ assert(reuse_packfile_objects);
+ nr_result += reuse_packfile_objects;
+ display_progress(progress_state, nr_result);
+ }
+
+ traverse_bitmap_commit_list(&add_object_entry_from_bitmap);
+ return 0;
+}
+
static void get_object_list(int ac, const char **av)
{
struct rev_info revs;
save_commit_buffer = 0;
setup_revisions(ac, av, &revs, NULL);
+ /* make sure shallows are read */
+ is_repository_shallow();
+
while (fgets(line, sizeof(line), stdin) != NULL) {
int len = strlen(line);
if (len && line[len - 1] == '\n')
if (*line == '-') {
if (!strcmp(line, "--not")) {
flags ^= UNINTERESTING;
+ write_bitmap_index = 0;
+ continue;
+ }
+ if (starts_with(line, "--shallow ")) {
+ unsigned char sha1[20];
+ if (get_sha1_hex(line + 10, sha1))
+ die("not an SHA-1 '%s'", line + 10);
+ register_shallow(sha1);
continue;
}
die("not a rev '%s'", line);
die("bad revision '%s'", line);
}
+ if (use_bitmap_index && !get_object_list_from_bitmap(&revs))
+ return;
+
if (prepare_revision_walk(&revs))
die("revision walk setup failed");
mark_edges_uninteresting(&revs, show_edge);
N_("pack compression level")),
OPT_SET_INT(0, "keep-true-parents", &grafts_replace_parents,
N_("do not hide commits by grafts"), 0),
+ OPT_BOOL(0, "use-bitmap-index", &use_bitmap_index,
+ N_("use a bitmap index if available to speed up counting objects")),
+ OPT_BOOL(0, "write-bitmap-index", &write_bitmap_index,
+ N_("write a bitmap index together with the pack index")),
OPT_END(),
};
- read_replace_refs = 0;
+ check_replace_refs = 0;
reset_pack_idx_option(&pack_idx_opts);
git_config(git_pack_config, NULL);
if (keep_unreachable && unpack_unreachable)
die("--keep-unreachable and --unpack-unreachable are incompatible.");
+ if (!use_internal_rev_list || !pack_to_stdout || is_repository_shallow())
+ use_bitmap_index = 0;
+
+ if (pack_to_stdout || !rev_list_all)
+ write_bitmap_index = 0;
+
if (progress && all_progress_implied)
progress = 2;
prepare_packed_git();
if (progress)
- progress_state = start_progress("Counting objects", 0);
+ progress_state = start_progress(_("Counting objects"), 0);
if (!use_internal_rev_list)
read_object_list_from_stdin();
else {