static const char *base_name;
static int progress = 1;
static int window = 10;
-static unsigned long pack_size_limit, pack_size_limit_cfg;
+static unsigned long pack_size_limit;
static int depth = 50;
static int delta_search_threads;
static int pack_to_stdout;
return hdrlen + datalen;
}
-static int write_one(struct sha1file *f,
- struct object_entry *e,
- off_t *offset)
+enum write_one_status {
+ WRITE_ONE_SKIP = -1, /* already written */
+ WRITE_ONE_BREAK = 0, /* writing this will bust the limit; not written */
+ WRITE_ONE_WRITTEN = 1, /* normal */
+ WRITE_ONE_RECURSIVE = 2 /* already scheduled to be written */
+};
+
+static enum write_one_status write_one(struct sha1file *f,
+ struct object_entry *e,
+ off_t *offset)
{
unsigned long size;
+ int recursing;
- /* offset is non zero if object is written already. */
- if (e->idx.offset || e->preferred_base)
- return -1;
+ /*
+ * we set offset to 1 (which is an impossible value) to mark
+ * the fact that this object is involved in "write its base
+ * first before writing a deltified object" recursion.
+ */
+ recursing = (e->idx.offset == 1);
+ if (recursing) {
+ warning("recursive delta detected for object %s",
+ sha1_to_hex(e->idx.sha1));
+ return WRITE_ONE_RECURSIVE;
+ } else if (e->idx.offset || e->preferred_base) {
+ /* offset is non zero if object is written already. */
+ return WRITE_ONE_SKIP;
+ }
/* if we are deltified, write out base object first. */
- if (e->delta && !write_one(f, e->delta, offset))
- return 0;
+ if (e->delta) {
+ e->idx.offset = 1; /* now recurse */
+ switch (write_one(f, e->delta, offset)) {
+ case WRITE_ONE_RECURSIVE:
+ /* we cannot depend on this one */
+ e->delta = NULL;
+ break;
+ default:
+ break;
+ case WRITE_ONE_BREAK:
+ e->idx.offset = recursing;
+ return WRITE_ONE_BREAK;
+ }
+ }
e->idx.offset = *offset;
size = write_object(f, e, *offset);
if (!size) {
- e->idx.offset = 0;
- return 0;
+ e->idx.offset = recursing;
+ return WRITE_ONE_BREAK;
}
written_list[nr_written++] = &e->idx;
if (signed_add_overflows(*offset, size))
die("pack too large for current definition of off_t");
*offset += size;
- return 1;
+ return WRITE_ONE_WRITTEN;
}
static int mark_tagged(const char *path, const unsigned char *sha1, int flag,
uint32_t i = 0, j;
struct sha1file *f;
off_t offset;
- struct pack_header hdr;
uint32_t nr_remaining = nr_result;
time_t last_mtime = 0;
struct object_entry **write_order;
unsigned char sha1[20];
char *pack_tmp_name = NULL;
- if (pack_to_stdout) {
+ if (pack_to_stdout)
f = sha1fd_throughput(1, "<stdout>", progress_state);
- } else {
- char tmpname[PATH_MAX];
- int fd;
- fd = odb_mkstemp(tmpname, sizeof(tmpname),
- "pack/tmp_pack_XXXXXX");
- pack_tmp_name = xstrdup(tmpname);
- f = sha1fd(fd, pack_tmp_name);
- }
-
- hdr.hdr_signature = htonl(PACK_SIGNATURE);
- hdr.hdr_version = htonl(PACK_VERSION);
- hdr.hdr_entries = htonl(nr_remaining);
- sha1write(f, &hdr, sizeof(hdr));
- offset = sizeof(hdr);
+ else
+ f = create_tmp_packfile(&pack_tmp_name);
+
+ offset = write_pack_header(f, nr_remaining);
+ if (!offset)
+ die_errno("unable to write pack header");
nr_written = 0;
for (; i < nr_objects; i++) {
struct object_entry *e = write_order[i];
- if (!write_one(f, e, &offset))
+ if (write_one(f, e, &offset) == WRITE_ONE_BREAK)
break;
display_progress(progress_state, written);
}
if (!pack_to_stdout) {
struct stat st;
- const char *idx_tmp_name;
char tmpname[PATH_MAX];
- 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));
- free_pack_by_name(tmpname);
- if (adjust_shared_perm(pack_tmp_name))
- die_errno("unable to make temporary pack file readable");
- if (rename(pack_tmp_name, tmpname))
- die_errno("unable to rename temporary pack file");
-
/*
* Packs are runtime accessed in their mtime
* order since newer packs are more likely to contain
* packs then we should modify the mtime of later ones
* to preserve this property.
*/
- if (stat(tmpname, &st) < 0) {
+ if (stat(pack_tmp_name, &st) < 0) {
warning("failed to stat %s: %s",
- tmpname, strerror(errno));
+ pack_tmp_name, 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)
+ if (utime(pack_tmp_name, &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_shared_perm(idx_tmp_name))
- die_errno("unable to make temporary index file readable");
- if (rename(idx_tmp_name, tmpname))
- die_errno("unable to rename temporary index file");
-
- free((void *) idx_tmp_name);
+ /* 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,
+ written_list, nr_written,
+ &pack_idx_opts, sha1);
free(pack_tmp_name);
puts(sha1_to_hex(sha1));
}
return -1;
/*
- * We do not bother to try a delta that we discarded
- * on an earlier try, but only when reusing delta data.
+ * We do not bother to try a delta that we discarded on an
+ * earlier try, but only when reusing delta data. Note that
+ * src_entry that is marked as the preferred_base should always
+ * be considered, as even if we produce a suboptimal delta against
+ * it, we will still save the transfer cost, as we already know
+ * the other side has it and we won't send src_entry at all.
*/
if (reuse_delta && trg_entry->in_pack &&
trg_entry->in_pack == src_entry->in_pack &&
+ !src_entry->preferred_base &&
trg_entry->in_pack_type != OBJ_REF_DELTA &&
trg_entry->in_pack_type != OBJ_OFS_DELTA)
return 0;
pack_idx_opts.version);
return 0;
}
- if (!strcmp(k, "pack.packsizelimit")) {
- pack_size_limit_cfg = git_config_ulong(k, v);
- return 0;
- }
return git_default_config(k, v, cb);
}