#include "tree.h"
#include "delta.h"
#include "pack.h"
+#include "pack-revindex.h"
#include "csum-file.h"
#include "tree-walk.h"
#include "diff.h"
#include "revision.h"
#include "list-objects.h"
#include "progress.h"
+#include "refs.h"
#ifdef THREADED_DELTA_SEARCH
+#include "thread-utils.h"
#include <pthread.h>
#endif
[--window=N] [--window-memory=N] [--depth=N] \n\
[--no-reuse-delta] [--no-reuse-object] [--delta-base-offset] \n\
[--threads=N] [--non-empty] [--revs [--unpacked | --all]*] [--reflog] \n\
- [--stdout | base-name] [--keep-unreachable] [<ref-list | <object-list]";
+ [--stdout | base-name] [--include-tag] [--keep-unreachable] \n\
+ [<ref-list | <object-list]";
struct object_entry {
struct pack_idx_entry idx;
static uint32_t nr_objects, nr_alloc, nr_result, nr_written;
static int non_empty;
-static int no_reuse_delta, no_reuse_object, keep_unreachable;
+static int no_reuse_delta, no_reuse_object, keep_unreachable, include_tag;
static int local;
static int incremental;
static int allow_ofs_delta;
static int *object_ix;
static int object_ix_hashsz;
-/*
- * Pack index for existing packs give us easy access to the offsets into
- * corresponding pack file where each object's data starts, but the entries
- * do not store the size of the compressed representation (uncompressed
- * size is easily available by examining the pack entry header). It is
- * also rather expensive to find the sha1 for an object given its offset.
- *
- * We build a hashtable of existing packs (pack_revindex), and keep reverse
- * index here -- pack index file is sorted by object name mapping to offset;
- * this pack_revindex[].revindex array is a list of offset/index_nr pairs
- * ordered by offset, so if you know the offset of an object, next offset
- * is where its packed representation ends and the index_nr can be used to
- * get the object sha1 from the main index.
- */
-struct revindex_entry {
- off_t offset;
- unsigned int nr;
-};
-struct pack_revindex {
- struct packed_git *p;
- struct revindex_entry *revindex;
-};
-static struct pack_revindex *pack_revindex;
-static int pack_revindex_hashsz;
-
/*
* stats
*/
static uint32_t written, written_delta;
static uint32_t reused, reused_delta;
-static int pack_revindex_ix(struct packed_git *p)
-{
- unsigned long ui = (unsigned long)p;
- int i;
-
- ui = ui ^ (ui >> 16); /* defeat structure alignment */
- i = (int)(ui % pack_revindex_hashsz);
- while (pack_revindex[i].p) {
- if (pack_revindex[i].p == p)
- return i;
- if (++i == pack_revindex_hashsz)
- i = 0;
- }
- return -1 - i;
-}
-
-static void prepare_pack_ix(void)
-{
- int num;
- struct packed_git *p;
- for (num = 0, p = packed_git; p; p = p->next)
- num++;
- if (!num)
- return;
- pack_revindex_hashsz = num * 11;
- pack_revindex = xcalloc(sizeof(*pack_revindex), pack_revindex_hashsz);
- for (p = packed_git; p; p = p->next) {
- num = pack_revindex_ix(p);
- num = - 1 - num;
- pack_revindex[num].p = p;
- }
- /* revindex elements are lazily initialized */
-}
-
-static int cmp_offset(const void *a_, const void *b_)
-{
- const struct revindex_entry *a = a_;
- const struct revindex_entry *b = b_;
- return (a->offset < b->offset) ? -1 : (a->offset > b->offset) ? 1 : 0;
-}
-
-/*
- * Ordered list of offsets of objects in the pack.
- */
-static void prepare_pack_revindex(struct pack_revindex *rix)
-{
- struct packed_git *p = rix->p;
- int num_ent = p->num_objects;
- int i;
- const char *index = p->index_data;
-
- rix->revindex = xmalloc(sizeof(*rix->revindex) * (num_ent + 1));
- index += 4 * 256;
-
- if (p->index_version > 1) {
- const uint32_t *off_32 =
- (uint32_t *)(index + 8 + p->num_objects * (20 + 4));
- const uint32_t *off_64 = off_32 + p->num_objects;
- for (i = 0; i < num_ent; i++) {
- uint32_t off = ntohl(*off_32++);
- if (!(off & 0x80000000)) {
- rix->revindex[i].offset = off;
- } else {
- rix->revindex[i].offset =
- ((uint64_t)ntohl(*off_64++)) << 32;
- rix->revindex[i].offset |=
- ntohl(*off_64++);
- }
- rix->revindex[i].nr = i;
- }
- } else {
- for (i = 0; i < num_ent; i++) {
- uint32_t hl = *((uint32_t *)(index + 24 * i));
- rix->revindex[i].offset = ntohl(hl);
- rix->revindex[i].nr = i;
- }
- }
-
- /* This knows the pack format -- the 20-byte trailer
- * follows immediately after the last object data.
- */
- rix->revindex[num_ent].offset = p->pack_size - 20;
- rix->revindex[num_ent].nr = -1;
- qsort(rix->revindex, num_ent, sizeof(*rix->revindex), cmp_offset);
-}
-
-static struct revindex_entry * find_packed_object(struct packed_git *p,
- off_t ofs)
-{
- int num;
- int lo, hi;
- struct pack_revindex *rix;
- struct revindex_entry *revindex;
- num = pack_revindex_ix(p);
- if (num < 0)
- die("internal error: pack revindex uninitialized");
- rix = &pack_revindex[num];
- if (!rix->revindex)
- prepare_pack_revindex(rix);
- revindex = rix->revindex;
- lo = 0;
- hi = p->num_objects + 1;
- do {
- int mi = (lo + hi) / 2;
- if (revindex[mi].offset == ofs) {
- return revindex + mi;
- }
- else if (ofs < revindex[mi].offset)
- hi = mi;
- else
- lo = mi + 1;
- } while (lo < hi);
- die("internal error: pack revindex corrupt");
-}
-
-static const unsigned char *find_packed_object_name(struct packed_git *p,
- off_t ofs)
-{
- struct revindex_entry *entry = find_packed_object(p, ofs);
- return nth_packed_object_sha1(p, entry->nr);
-}
static void *delta_against(void *buf, unsigned long size, struct object_entry *entry)
{
}
hdrlen = encode_header(obj_type, entry->size, header);
offset = entry->in_pack_offset;
- revidx = find_packed_object(p, offset);
+ revidx = find_pack_revindex(p, offset);
datalen = revidx[1].offset - offset;
if (!pack_to_stdout && p->index_version > 1 &&
check_pack_crc(p, &w_curs, offset, datalen, revidx->nr))
struct pack_header hdr;
int do_progress = progress >> pack_to_stdout;
uint32_t nr_remaining = nr_result;
+ time_t last_mtime = 0;
if (do_progress)
progress_state = start_progress("Writing objects", nr_result);
if (!pack_to_stdout) {
mode_t mode = umask(0);
+ struct stat st;
char *idx_tmp_name, tmpname[PATH_MAX];
umask(mode);
idx_tmp_name = write_idx_file(NULL, written_list,
nr_written, sha1);
+
snprintf(tmpname, sizeof(tmpname), "%s-%s.pack",
base_name, sha1_to_hex(sha1));
if (adjust_perm(pack_tmp_name, mode))
if (rename(pack_tmp_name, tmpname))
die("unable to rename temporary pack file: %s",
strerror(errno));
+
+ /*
+ * Packs are runtime accessed in their mtime
+ * order since newer packs are more likely to contain
+ * younger objects. So if we are creating multiple
+ * packs then we should modify the mtime of later ones
+ * to preserve this property.
+ */
+ if (stat(tmpname, &st) < 0) {
+ warning("failed to stat %s: %s",
+ tmpname, strerror(errno));
+ } else if (!last_mtime) {
+ last_mtime = st.st_mtime;
+ } else {
+ struct utimbuf utb;
+ utb.actime = st.st_atime;
+ utb.modtime = --last_mtime;
+ if (utime(tmpname, &utb) < 0)
+ warning("failed utime() on %s: %s",
+ tmpname, strerror(errno));
+ }
+
snprintf(tmpname, sizeof(tmpname), "%s-%s.idx",
base_name, sha1_to_hex(sha1));
if (adjust_perm(idx_tmp_name, mode))
if (rename(idx_tmp_name, tmpname))
die("unable to rename temporary index file: %s",
strerror(errno));
+
free(idx_tmp_name);
free(pack_tmp_name);
puts(sha1_to_hex(sha1));
die("delta base offset out of bound for %s",
sha1_to_hex(entry->idx.sha1));
ofs = entry->in_pack_offset - ofs;
- if (!no_reuse_delta && !entry->preferred_base)
- base_ref = find_packed_object_name(p, ofs);
+ if (!no_reuse_delta && !entry->preferred_base) {
+ struct revindex_entry *revidx;
+ revidx = find_pack_revindex(p, ofs);
+ base_ref = nth_packed_object_sha1(p, revidx->nr);
+ }
entry->in_pack_header_size = used + used_0;
break;
}
sorted_by_offset[i] = objects + i;
qsort(sorted_by_offset, nr_objects, sizeof(*sorted_by_offset), pack_offset_sort);
- prepare_pack_ix();
+ init_pack_revindex();
+
for (i = 0; i < nr_objects; i++)
check_object(sorted_by_offset[i]);
+
free(sorted_by_offset);
}
* accounting lock. Compiler will optimize the strangeness
* away when THREADED_DELTA_SEARCH is not defined.
*/
- if (trg_entry->delta_data)
- free(trg_entry->delta_data);
+ free(trg_entry->delta_data);
cache_lock();
if (trg_entry->delta_data) {
delta_cache_size -= trg_entry->delta_size;
#define ll_find_deltas(l, s, w, d, p) find_deltas(l, &s, w, d, p)
#endif
+static int add_ref_tag(const char *path, const unsigned char *sha1, int flag, void *cb_data)
+{
+ unsigned char peeled[20];
+
+ if (!prefixcmp(path, "refs/tags/") && /* is a tag? */
+ !peel_ref(path, peeled) && /* peelable? */
+ !is_null_sha1(peeled) && /* annotated tag? */
+ locate_object_entry(peeled)) /* object packed? */
+ add_object_entry(sha1, OBJ_TAG, NULL, 0);
+ return 0;
+}
+
static void prepare_pack(int window, int depth)
{
struct object_entry **delta_list;
}
if (!strcmp(k, "pack.threads")) {
delta_search_threads = git_config_int(k, v);
- if (delta_search_threads < 1)
+ if (delta_search_threads < 0)
die("invalid number of threads specified (%d)",
delta_search_threads);
#ifndef THREADED_DELTA_SEARCH
- if (delta_search_threads > 1)
+ if (delta_search_threads != 1)
warning("no threads support, ignoring %s", k);
#endif
return 0;
init_revisions(&revs, NULL);
save_commit_buffer = 0;
- track_object_refs = 0;
setup_revisions(ac, av, &revs, NULL);
while (fgets(line, sizeof(line), stdin) != NULL) {
if (!prefixcmp(arg, "--threads=")) {
char *end;
delta_search_threads = strtoul(arg+10, &end, 0);
- if (!arg[10] || *end || delta_search_threads < 1)
+ if (!arg[10] || *end || delta_search_threads < 0)
usage(pack_usage);
#ifndef THREADED_DELTA_SEARCH
- if (delta_search_threads > 1)
+ if (delta_search_threads != 1)
warning("no threads support, "
"ignoring %s", arg);
#endif
keep_unreachable = 1;
continue;
}
+ if (!strcmp("--include-tag", arg)) {
+ include_tag = 1;
+ continue;
+ }
if (!strcmp("--unpacked", arg) ||
!prefixcmp(arg, "--unpacked=") ||
!strcmp("--reflog", arg) ||
if (!pack_to_stdout && thin)
die("--thin cannot be used to build an indexable pack.");
+#ifdef THREADED_DELTA_SEARCH
+ if (!delta_search_threads) /* --threads=0 means autodetect */
+ delta_search_threads = online_cpus();
+#endif
+
prepare_packed_git();
if (progress)
rp_av[rp_ac] = NULL;
get_object_list(rp_ac, rp_av);
}
+ if (include_tag && nr_result)
+ for_each_ref(add_ref_tag, NULL);
stop_progress(&progress_state);
if (non_empty && !nr_result)