#include "pack.h"
#include "csum-file.h"
-uint32_t pack_idx_default_version = 2;
-uint32_t pack_idx_off32_limit = 0x7fffffff;
+void reset_pack_idx_option(struct pack_idx_option *opts)
+{
+ memset(opts, 0, sizeof(*opts));
+ opts->version = 2;
+ opts->off32_limit = 0x7fffffff;
+}
static int sha1_compare(const void *_a, const void *_b)
{
return hashcmp(a->sha1, b->sha1);
}
+static int cmp_uint32(const void *a_, const void *b_)
+{
+ uint32_t a = *((uint32_t *)a_);
+ uint32_t b = *((uint32_t *)b_);
+
+ return (a < b) ? -1 : (a != b);
+}
+
+static int need_large_offset(off_t offset, const struct pack_idx_option *opts)
+{
+ uint32_t ofsval;
+
+ if ((offset >> 31) || (opts->off32_limit < offset))
+ return 1;
+ if (!opts->anomaly_nr)
+ return 0;
+ ofsval = offset;
+ return !!bsearch(&ofsval, opts->anomaly, opts->anomaly_nr,
+ sizeof(ofsval), cmp_uint32);
+}
+
/*
* On entry *sha1 contains the pack content SHA1 hash, on exit it is
* the SHA1 hash of sorted object names. The objects array passed in
* will be sorted by SHA1 on exit.
*/
const char *write_idx_file(const char *index_name, struct pack_idx_entry **objects,
- int nr_objects, unsigned char *sha1)
+ int nr_objects, const struct pack_idx_option *opts,
+ unsigned char *sha1)
{
struct sha1file *f;
struct pack_idx_entry **sorted_by_sha, **list, **last;
else
sorted_by_sha = list = last = NULL;
- if (!index_name) {
- static char tmpfile[PATH_MAX];
- fd = odb_mkstemp(tmpfile, sizeof(tmpfile), "pack/tmp_idx_XXXXXX");
- index_name = xstrdup(tmpfile);
+ if (opts->flags & WRITE_IDX_VERIFY) {
+ assert(index_name);
+ f = sha1fd_check(index_name);
} else {
- unlink(index_name);
- fd = open(index_name, O_CREAT|O_EXCL|O_WRONLY, 0600);
+ if (!index_name) {
+ static char tmp_file[PATH_MAX];
+ fd = odb_mkstemp(tmp_file, sizeof(tmp_file), "pack/tmp_idx_XXXXXX");
+ index_name = xstrdup(tmp_file);
+ } else {
+ unlink(index_name);
+ fd = open(index_name, O_CREAT|O_EXCL|O_WRONLY, 0600);
+ }
+ if (fd < 0)
+ die_errno("unable to create '%s'", index_name);
+ f = sha1fd(fd, index_name);
}
- if (fd < 0)
- die_errno("unable to create '%s'", index_name);
- f = sha1fd(fd, index_name);
/* if last object's offset is >= 2^31 we should use index V2 */
- index_version = (last_obj_offset >> 31) ? 2 : pack_idx_default_version;
+ index_version = need_large_offset(last_obj_offset, opts) ? 2 : opts->version;
/* index versions 2 and above need a header */
if (index_version >= 2) {
}
sha1write(f, obj->sha1, 20);
git_SHA1_Update(&ctx, obj->sha1, 20);
+ if ((opts->flags & WRITE_IDX_STRICT) &&
+ (i && !hashcmp(list[-2]->sha1, obj->sha1)))
+ die("The same object %s appears twice in the pack",
+ sha1_to_hex(obj->sha1));
}
if (index_version >= 2) {
list = sorted_by_sha;
for (i = 0; i < nr_objects; i++) {
struct pack_idx_entry *obj = *list++;
- uint32_t offset = (obj->offset <= pack_idx_off32_limit) ?
- obj->offset : (0x80000000 | nr_large_offset++);
+ uint32_t offset;
+
+ offset = (need_large_offset(obj->offset, opts)
+ ? (0x80000000 | nr_large_offset++)
+ : obj->offset);
offset = htonl(offset);
sha1write(f, &offset, 4);
}
while (nr_large_offset) {
struct pack_idx_entry *obj = *list++;
uint64_t offset = obj->offset;
- if (offset > pack_idx_off32_limit) {
- uint32_t split[2];
- split[0] = htonl(offset >> 32);
- split[1] = htonl(offset & 0xffffffff);
- sha1write(f, split, 8);
- nr_large_offset--;
- }
+ uint32_t split[2];
+
+ if (!need_large_offset(offset, opts))
+ continue;
+ split[0] = htonl(offset >> 32);
+ split[1] = htonl(offset & 0xffffffff);
+ sha1write(f, split, 8);
+ nr_large_offset--;
}
}
sha1write(f, sha1, 20);
- sha1close(f, NULL, CSUM_FSYNC);
+ sha1close(f, NULL, ((opts->flags & WRITE_IDX_VERIFY)
+ ? CSUM_CLOSE : CSUM_FSYNC));
git_SHA1_Final(sha1, &ctx);
return index_name;
}
+off_t write_pack_header(struct sha1file *f, uint32_t nr_entries)
+{
+ struct pack_header hdr;
+
+ hdr.hdr_signature = htonl(PACK_SIGNATURE);
+ hdr.hdr_version = htonl(PACK_VERSION);
+ hdr.hdr_entries = htonl(nr_entries);
+ if (sha1write(f, &hdr, sizeof(hdr)))
+ return 0;
+ return sizeof(hdr);
+}
+
/*
* Update pack header with object_count and compute new SHA1 for pack data
* associated to pack_fd, and write that SHA1 at the end. That new SHA1
*hdr = c;
return n;
}
+
+struct sha1file *create_tmp_packfile(char **pack_tmp_name)
+{
+ char tmpname[PATH_MAX];
+ int fd;
+
+ fd = odb_mkstemp(tmpname, sizeof(tmpname), "pack/tmp_pack_XXXXXX");
+ *pack_tmp_name = xstrdup(tmpname);
+ return sha1fd(fd, *pack_tmp_name);
+}
+
+void finish_tmp_packfile(char *name_buffer,
+ const char *pack_tmp_name,
+ struct pack_idx_entry **written_list,
+ uint32_t nr_written,
+ struct pack_idx_option *pack_idx_opts,
+ unsigned char sha1[])
+{
+ const char *idx_tmp_name;
+ char *end_of_name_prefix = strrchr(name_buffer, 0);
+
+ if (adjust_shared_perm(pack_tmp_name))
+ die_errno("unable to make temporary pack file readable");
+
+ idx_tmp_name = write_idx_file(NULL, written_list, nr_written,
+ pack_idx_opts, sha1);
+ if (adjust_shared_perm(idx_tmp_name))
+ die_errno("unable to make temporary index file readable");
+
+ sprintf(end_of_name_prefix, "%s.pack", sha1_to_hex(sha1));
+ free_pack_by_name(name_buffer);
+
+ if (rename(pack_tmp_name, name_buffer))
+ die_errno("unable to rename temporary pack file");
+
+ sprintf(end_of_name_prefix, "%s.idx", sha1_to_hex(sha1));
+ if (rename(idx_tmp_name, name_buffer))
+ die_errno("unable to rename temporary index file");
+
+ free((void *)idx_tmp_name);
+}