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Merge branch 'bc/object-id'

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Conversion from uchar[20] to struct object_id continues.

* bc/object-id: (42 commits)
  merge-one-file: compute empty blob object ID
  add--interactive: compute the empty tree value
  Update shell scripts to compute empty tree object ID
  sha1_file: only expose empty object constants through git_hash_algo
  dir: use the_hash_algo for empty blob object ID
  sequencer: use the_hash_algo for empty tree object ID
  cache-tree: use is_empty_tree_oid
  sha1_file: convert cached object code to struct object_id
  builtin/reset: convert use of EMPTY_TREE_SHA1_BIN
  builtin/receive-pack: convert one use of EMPTY_TREE_SHA1_HEX
  wt-status: convert two uses of EMPTY_TREE_SHA1_HEX
  submodule: convert several uses of EMPTY_TREE_SHA1_HEX
  sequencer: convert one use of EMPTY_TREE_SHA1_HEX
  merge: convert empty tree constant to the_hash_algo
  builtin/merge: switch tree functions to use object_id
  builtin/am: convert uses of EMPTY_TREE_SHA1_BIN to the_hash_algo
  sha1-file: add functions for hex empty tree and blob OIDs
  builtin/receive-pack: avoid hard-coded constants for push certs
  diff: specify abbreviation size in terms of the_hash_algo
  upload-pack: replace use of several hard-coded constants
  ...
This commit is contained in:
Junio C Hamano
2018-05-30 14:04:10 +09:00
parent 3d24129799 7882fa220c
commit 42c8ce1c49
46 changed files with 348 additions and 306 deletions
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81
sha1-file.c
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@ -36,12 +36,21 @@
/* The maximum size for an object header. */
#define MAX_HEADER_LEN 32
#define EMPTY_TREE_SHA1_BIN_LITERAL \
"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
#define EMPTY_BLOB_SHA1_BIN_LITERAL \
"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
const unsigned char null_sha1[GIT_MAX_RAWSZ];
const struct object_id null_oid;
const struct object_id empty_tree_oid = {
static const struct object_id empty_tree_oid = {
EMPTY_TREE_SHA1_BIN_LITERAL
};
const struct object_id empty_blob_oid = {
static const struct object_id empty_blob_oid = {
EMPTY_BLOB_SHA1_BIN_LITERAL
};
@ -101,6 +110,18 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
},
};
const char *empty_tree_oid_hex(void)
{
static char buf[GIT_MAX_HEXSZ + 1];
return oid_to_hex_r(buf, the_hash_algo->empty_tree);
}
const char *empty_blob_oid_hex(void)
{
static char buf[GIT_MAX_HEXSZ + 1];
return oid_to_hex_r(buf, the_hash_algo->empty_blob);
}
/*
* This is meant to hold a *small* number of objects that you would
* want read_sha1_file() to be able to return, but yet you do not want
@ -108,7 +129,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
* application).
*/
static struct cached_object {
unsigned char sha1[20];
struct object_id oid;
enum object_type type;
void *buf;
unsigned long size;
@ -116,22 +137,22 @@ static struct cached_object {
static int cached_object_nr, cached_object_alloc;
static struct cached_object empty_tree = {
EMPTY_TREE_SHA1_BIN_LITERAL,
{ EMPTY_TREE_SHA1_BIN_LITERAL },
OBJ_TREE,
"",
0
};
static struct cached_object *find_cached_object(const unsigned char *sha1)
static struct cached_object *find_cached_object(const struct object_id *oid)
{
int i;
struct cached_object *co = cached_objects;
for (i = 0; i < cached_object_nr; i++, co++) {
if (!hashcmp(co->sha1, sha1))
if (!oidcmp(&co->oid, oid))
return co;
}
if (!hashcmp(sha1, empty_tree.sha1))
if (!oidcmp(oid, the_hash_algo->empty_tree))
return &empty_tree;
return NULL;
}
@ -710,42 +731,42 @@ int check_and_freshen_file(const char *fn, int freshen)
return 1;
}
static int check_and_freshen_local(const unsigned char *sha1, int freshen)
static int check_and_freshen_local(const struct object_id *oid, int freshen)
{
static struct strbuf buf = STRBUF_INIT;
strbuf_reset(&buf);
sha1_file_name(the_repository, &buf, sha1);
sha1_file_name(the_repository, &buf, oid->hash);
return check_and_freshen_file(buf.buf, freshen);
}
static int check_and_freshen_nonlocal(const unsigned char *sha1, int freshen)
static int check_and_freshen_nonlocal(const struct object_id *oid, int freshen)
{
struct alternate_object_database *alt;
prepare_alt_odb(the_repository);
for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
const char *path = alt_sha1_path(alt, sha1);
const char *path = alt_sha1_path(alt, oid->hash);
if (check_and_freshen_file(path, freshen))
return 1;
}
return 0;
}
static int check_and_freshen(const unsigned char *sha1, int freshen)
static int check_and_freshen(const struct object_id *oid, int freshen)
{
return check_and_freshen_local(sha1, freshen) ||
check_and_freshen_nonlocal(sha1, freshen);
return check_and_freshen_local(oid, freshen) ||
check_and_freshen_nonlocal(oid, freshen);
}
int has_loose_object_nonlocal(const unsigned char *sha1)
int has_loose_object_nonlocal(const struct object_id *oid)
{
return check_and_freshen_nonlocal(sha1, 0);
return check_and_freshen_nonlocal(oid, 0);
}
static int has_loose_object(const unsigned char *sha1)
static int has_loose_object(const struct object_id *oid)
{
return check_and_freshen(sha1, 0);
return check_and_freshen(oid, 0);
}
static void mmap_limit_check(size_t length)
@ -1250,7 +1271,7 @@ int oid_object_info_extended(struct repository *r, const struct object_id *oid,
oi = &blank_oi;
if (!(flags & OBJECT_INFO_SKIP_CACHED)) {
struct cached_object *co = find_cached_object(real->hash);
struct cached_object *co = find_cached_object(real);
if (co) {
if (oi->typep)
*(oi->typep) = co->type;
@ -1270,7 +1291,7 @@ int oid_object_info_extended(struct repository *r, const struct object_id *oid,
}
while (1) {
if (find_pack_entry(r, real->hash, &e))
if (find_pack_entry(r, real, &e))
break;
if (flags & OBJECT_INFO_IGNORE_LOOSE)
@ -1283,7 +1304,7 @@ int oid_object_info_extended(struct repository *r, const struct object_id *oid,
/* Not a loose object; someone else may have just packed it. */
if (!(flags & OBJECT_INFO_QUICK)) {
reprepare_packed_git(r);
if (find_pack_entry(r, real->hash, &e))
if (find_pack_entry(r, real, &e))
break;
}
@ -1363,7 +1384,7 @@ int pretend_object_file(void *buf, unsigned long len, enum object_type type,
struct cached_object *co;
hash_object_file(buf, len, type_name(type), oid);
if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
if (has_sha1_file(oid->hash) || find_cached_object(oid))
return 0;
ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
co = &cached_objects[cached_object_nr++];
@ -1371,7 +1392,7 @@ int pretend_object_file(void *buf, unsigned long len, enum object_type type,
co->type = type;
co->buf = xmalloc(len);
memcpy(co->buf, buf, len);
hashcpy(co->sha1, oid->hash);
oidcpy(&co->oid, oid);
return 0;
}
@ -1667,15 +1688,15 @@ static int write_loose_object(const struct object_id *oid, char *hdr,
return finalize_object_file(tmp_file.buf, filename.buf);
}
static int freshen_loose_object(const unsigned char *sha1)
static int freshen_loose_object(const struct object_id *oid)
{
return check_and_freshen(sha1, 1);
return check_and_freshen(oid, 1);
}
static int freshen_packed_object(const unsigned char *sha1)
static int freshen_packed_object(const struct object_id *oid)
{
struct pack_entry e;
if (!find_pack_entry(the_repository, sha1, &e))
if (!find_pack_entry(the_repository, oid, &e))
return 0;
if (e.p->freshened)
return 1;
@ -1695,7 +1716,7 @@ int write_object_file(const void *buf, unsigned long len, const char *type,
* it out into .git/objects/??/?{38} file.
*/
write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
if (freshen_packed_object(oid) || freshen_loose_object(oid))
return 0;
return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
}
@ -1714,7 +1735,7 @@ int hash_object_file_literally(const void *buf, unsigned long len,
if (!(flags & HASH_WRITE_OBJECT))
goto cleanup;
if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
if (freshen_packed_object(oid) || freshen_loose_object(oid))
goto cleanup;
status = write_loose_object(oid, header, hdrlen, buf, len, 0);
@ -1732,7 +1753,7 @@ int force_object_loose(const struct object_id *oid, time_t mtime)
int hdrlen;
int ret;
if (has_loose_object(oid->hash))
if (has_loose_object(oid))
return 0;
buf = read_object(oid->hash, &type, &len);
if (!buf)