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-rw-r--r--object-file.c255
1 files changed, 214 insertions, 41 deletions
diff --git a/object-file.c b/object-file.c
index 619f039ebc..065103be3e 100644
--- a/object-file.c
+++ b/object-file.c
@@ -6,6 +6,9 @@
* This handles basic git object files - packing, unpacking,
* creation etc.
*/
+
+#define USE_THE_REPOSITORY_VARIABLE
+
#include "git-compat-util.h"
#include "abspath.h"
#include "config.h"
@@ -35,6 +38,8 @@
#include "setup.h"
#include "submodule.h"
#include "fsck.h"
+#include "loose.h"
+#include "object-file-convert.h"
/* The maximum size for an object header. */
#define MAX_HEADER_LEN 32
@@ -225,16 +230,10 @@ const struct object_id *null_oid(void)
return the_hash_algo->null_oid;
}
-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)
+const char *empty_tree_oid_hex(const struct git_hash_algo *algop)
{
static char buf[GIT_MAX_HEXSZ + 1];
- return oid_to_hex_r(buf, the_hash_algo->empty_blob);
+ return oid_to_hex_r(buf, algop->empty_tree);
}
int hash_algo_by_name(const char *name)
@@ -275,7 +274,7 @@ int hash_algo_by_length(int len)
static struct cached_object {
struct object_id oid;
enum object_type type;
- void *buf;
+ const void *buf;
unsigned long size;
} *cached_objects;
static int cached_object_nr, cached_object_alloc;
@@ -1084,9 +1083,11 @@ int check_object_signature(struct repository *r, const struct object_id *oid,
void *buf, unsigned long size,
enum object_type type)
{
+ const struct git_hash_algo *algo =
+ oid->algo ? &hash_algos[oid->algo] : r->hash_algo;
struct object_id real_oid;
- hash_object_file(r->hash_algo, buf, size, type, &real_oid);
+ hash_object_file(algo, buf, size, type, &real_oid);
return !oideq(oid, &real_oid) ? -1 : 0;
}
@@ -1442,7 +1443,7 @@ static int loose_object_info(struct repository *r,
int allow_unknown = flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE;
if (oi->delta_base_oid)
- oidclr(oi->delta_base_oid);
+ oidclr(oi->delta_base_oid, the_repository->hash_algo);
/*
* If we don't care about type or size, then we don't
@@ -1576,7 +1577,7 @@ static int do_oid_object_info_extended(struct repository *r,
if (oi->disk_sizep)
*(oi->disk_sizep) = 0;
if (oi->delta_base_oid)
- oidclr(oi->delta_base_oid);
+ oidclr(oi->delta_base_oid, the_repository->hash_algo);
if (oi->type_name)
strbuf_addstr(oi->type_name, type_name(co->type));
if (oi->contentp)
@@ -1652,10 +1653,101 @@ static int do_oid_object_info_extended(struct repository *r,
return 0;
}
+static int oid_object_info_convert(struct repository *r,
+ const struct object_id *input_oid,
+ struct object_info *input_oi, unsigned flags)
+{
+ const struct git_hash_algo *input_algo = &hash_algos[input_oid->algo];
+ int do_die = flags & OBJECT_INFO_DIE_IF_CORRUPT;
+ struct strbuf type_name = STRBUF_INIT;
+ struct object_id oid, delta_base_oid;
+ struct object_info new_oi, *oi;
+ unsigned long size;
+ void *content;
+ int ret;
+
+ if (repo_oid_to_algop(r, input_oid, the_hash_algo, &oid)) {
+ if (do_die)
+ die(_("missing mapping of %s to %s"),
+ oid_to_hex(input_oid), the_hash_algo->name);
+ return -1;
+ }
+
+ /* Is new_oi needed? */
+ oi = input_oi;
+ if (input_oi && (input_oi->delta_base_oid || input_oi->sizep ||
+ input_oi->contentp)) {
+ new_oi = *input_oi;
+ /* Does delta_base_oid need to be converted? */
+ if (input_oi->delta_base_oid)
+ new_oi.delta_base_oid = &delta_base_oid;
+ /* Will the attributes differ when converted? */
+ if (input_oi->sizep || input_oi->contentp) {
+ new_oi.contentp = &content;
+ new_oi.sizep = &size;
+ new_oi.type_name = &type_name;
+ }
+ oi = &new_oi;
+ }
+
+ ret = oid_object_info_extended(r, &oid, oi, flags);
+ if (ret)
+ return -1;
+ if (oi == input_oi)
+ return ret;
+
+ if (new_oi.contentp) {
+ struct strbuf outbuf = STRBUF_INIT;
+ enum object_type type;
+
+ type = type_from_string_gently(type_name.buf, type_name.len,
+ !do_die);
+ if (type == -1)
+ return -1;
+ if (type != OBJ_BLOB) {
+ ret = convert_object_file(&outbuf,
+ the_hash_algo, input_algo,
+ content, size, type, !do_die);
+ free(content);
+ if (ret == -1)
+ return -1;
+ size = outbuf.len;
+ content = strbuf_detach(&outbuf, NULL);
+ }
+ if (input_oi->sizep)
+ *input_oi->sizep = size;
+ if (input_oi->contentp)
+ *input_oi->contentp = content;
+ else
+ free(content);
+ if (input_oi->type_name)
+ *input_oi->type_name = type_name;
+ else
+ strbuf_release(&type_name);
+ }
+ if (new_oi.delta_base_oid == &delta_base_oid) {
+ if (repo_oid_to_algop(r, &delta_base_oid, input_algo,
+ input_oi->delta_base_oid)) {
+ if (do_die)
+ die(_("missing mapping of %s to %s"),
+ oid_to_hex(&delta_base_oid),
+ input_algo->name);
+ return -1;
+ }
+ }
+ input_oi->whence = new_oi.whence;
+ input_oi->u = new_oi.u;
+ return ret;
+}
+
int oid_object_info_extended(struct repository *r, const struct object_id *oid,
struct object_info *oi, unsigned flags)
{
int ret;
+
+ if (oid->algo && (hash_algo_by_ptr(r->hash_algo) != oid->algo))
+ return oid_object_info_convert(r, oid, oi, flags);
+
obj_read_lock();
ret = do_oid_object_info_extended(r, oid, oi, flags);
obj_read_unlock();
@@ -1683,6 +1775,7 @@ int pretend_object_file(void *buf, unsigned long len, enum object_type type,
struct object_id *oid)
{
struct cached_object *co;
+ char *co_buf;
hash_object_file(the_hash_algo, buf, len, type, oid);
if (repo_has_object_file_with_flags(the_repository, oid, OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT) ||
@@ -1692,8 +1785,9 @@ int pretend_object_file(void *buf, unsigned long len, enum object_type type,
co = &cached_objects[cached_object_nr++];
co->size = len;
co->type = type;
- co->buf = xmalloc(len);
- memcpy(co->buf, buf, len);
+ co_buf = xmalloc(len);
+ memcpy(co_buf, buf, len);
+ co->buf = co_buf;
oidcpy(&co->oid, oid);
return 0;
}
@@ -1944,9 +2038,12 @@ static int start_loose_object_common(struct strbuf *tmp_file,
const char *filename, unsigned flags,
git_zstream *stream,
unsigned char *buf, size_t buflen,
- git_hash_ctx *c,
+ git_hash_ctx *c, git_hash_ctx *compat_c,
char *hdr, int hdrlen)
{
+ struct repository *repo = the_repository;
+ const struct git_hash_algo *algo = repo->hash_algo;
+ const struct git_hash_algo *compat = repo->compat_hash_algo;
int fd;
fd = create_tmpfile(tmp_file, filename);
@@ -1966,14 +2063,18 @@ static int start_loose_object_common(struct strbuf *tmp_file,
git_deflate_init(stream, zlib_compression_level);
stream->next_out = buf;
stream->avail_out = buflen;
- the_hash_algo->init_fn(c);
+ algo->init_fn(c);
+ if (compat && compat_c)
+ compat->init_fn(compat_c);
/* Start to feed header to zlib stream */
stream->next_in = (unsigned char *)hdr;
stream->avail_in = hdrlen;
while (git_deflate(stream, 0) == Z_OK)
; /* nothing */
- the_hash_algo->update_fn(c, hdr, hdrlen);
+ algo->update_fn(c, hdr, hdrlen);
+ if (compat && compat_c)
+ compat->update_fn(compat_c, hdr, hdrlen);
return fd;
}
@@ -1982,16 +2083,21 @@ static int start_loose_object_common(struct strbuf *tmp_file,
* Common steps for the inner git_deflate() loop for writing loose
* objects. Returns what git_deflate() returns.
*/
-static int write_loose_object_common(git_hash_ctx *c,
+static int write_loose_object_common(git_hash_ctx *c, git_hash_ctx *compat_c,
git_zstream *stream, const int flush,
unsigned char *in0, const int fd,
unsigned char *compressed,
const size_t compressed_len)
{
+ struct repository *repo = the_repository;
+ const struct git_hash_algo *algo = repo->hash_algo;
+ const struct git_hash_algo *compat = repo->compat_hash_algo;
int ret;
ret = git_deflate(stream, flush ? Z_FINISH : 0);
- the_hash_algo->update_fn(c, in0, stream->next_in - in0);
+ algo->update_fn(c, in0, stream->next_in - in0);
+ if (compat && compat_c)
+ compat->update_fn(compat_c, in0, stream->next_in - in0);
if (write_in_full(fd, compressed, stream->next_out - compressed) < 0)
die_errno(_("unable to write loose object file"));
stream->next_out = compressed;
@@ -2006,15 +2112,21 @@ static int write_loose_object_common(git_hash_ctx *c,
* - End the compression of zlib stream.
* - Get the calculated oid to "oid".
*/
-static int end_loose_object_common(git_hash_ctx *c, git_zstream *stream,
- struct object_id *oid)
+static int end_loose_object_common(git_hash_ctx *c, git_hash_ctx *compat_c,
+ git_zstream *stream, struct object_id *oid,
+ struct object_id *compat_oid)
{
+ struct repository *repo = the_repository;
+ const struct git_hash_algo *algo = repo->hash_algo;
+ const struct git_hash_algo *compat = repo->compat_hash_algo;
int ret;
ret = git_deflate_end_gently(stream);
if (ret != Z_OK)
return ret;
- the_hash_algo->final_oid_fn(oid, c);
+ algo->final_oid_fn(oid, c);
+ if (compat && compat_c)
+ compat->final_oid_fn(compat_oid, compat_c);
return Z_OK;
}
@@ -2038,7 +2150,7 @@ static int write_loose_object(const struct object_id *oid, char *hdr,
fd = start_loose_object_common(&tmp_file, filename.buf, flags,
&stream, compressed, sizeof(compressed),
- &c, hdr, hdrlen);
+ &c, NULL, hdr, hdrlen);
if (fd < 0)
return -1;
@@ -2048,14 +2160,14 @@ static int write_loose_object(const struct object_id *oid, char *hdr,
do {
unsigned char *in0 = stream.next_in;
- ret = write_loose_object_common(&c, &stream, 1, in0, fd,
+ ret = write_loose_object_common(&c, NULL, &stream, 1, in0, fd,
compressed, sizeof(compressed));
} while (ret == Z_OK);
if (ret != Z_STREAM_END)
die(_("unable to deflate new object %s (%d)"), oid_to_hex(oid),
ret);
- ret = end_loose_object_common(&c, &stream, &parano_oid);
+ ret = end_loose_object_common(&c, NULL, &stream, &parano_oid, NULL);
if (ret != Z_OK)
die(_("deflateEnd on object %s failed (%d)"), oid_to_hex(oid),
ret);
@@ -2100,10 +2212,12 @@ static int freshen_packed_object(const struct object_id *oid)
int stream_loose_object(struct input_stream *in_stream, size_t len,
struct object_id *oid)
{
+ const struct git_hash_algo *compat = the_repository->compat_hash_algo;
+ struct object_id compat_oid;
int fd, ret, err = 0, flush = 0;
unsigned char compressed[4096];
git_zstream stream;
- git_hash_ctx c;
+ git_hash_ctx c, compat_c;
struct strbuf tmp_file = STRBUF_INIT;
struct strbuf filename = STRBUF_INIT;
int dirlen;
@@ -2127,7 +2241,7 @@ int stream_loose_object(struct input_stream *in_stream, size_t len,
*/
fd = start_loose_object_common(&tmp_file, filename.buf, 0,
&stream, compressed, sizeof(compressed),
- &c, hdr, hdrlen);
+ &c, &compat_c, hdr, hdrlen);
if (fd < 0) {
err = -1;
goto cleanup;
@@ -2145,7 +2259,7 @@ int stream_loose_object(struct input_stream *in_stream, size_t len,
if (in_stream->is_finished)
flush = 1;
}
- ret = write_loose_object_common(&c, &stream, flush, in0, fd,
+ ret = write_loose_object_common(&c, &compat_c, &stream, flush, in0, fd,
compressed, sizeof(compressed));
/*
* Unlike write_loose_object(), we do not have the entire
@@ -2168,7 +2282,7 @@ int stream_loose_object(struct input_stream *in_stream, size_t len,
*/
if (ret != Z_STREAM_END)
die(_("unable to stream deflate new object (%d)"), ret);
- ret = end_loose_object_common(&c, &stream, oid);
+ ret = end_loose_object_common(&c, &compat_c, &stream, oid, &compat_oid);
if (ret != Z_OK)
die(_("deflateEnd on stream object failed (%d)"), ret);
close_loose_object(fd, tmp_file.buf);
@@ -2195,6 +2309,8 @@ int stream_loose_object(struct input_stream *in_stream, size_t len,
}
err = finalize_object_file(tmp_file.buf, filename.buf);
+ if (!err && compat)
+ err = repo_add_loose_object_map(the_repository, oid, &compat_oid);
cleanup:
strbuf_release(&tmp_file);
strbuf_release(&filename);
@@ -2203,19 +2319,42 @@ cleanup:
int write_object_file_flags(const void *buf, unsigned long len,
enum object_type type, struct object_id *oid,
- unsigned flags)
+ struct object_id *compat_oid_in, unsigned flags)
{
+ struct repository *repo = the_repository;
+ const struct git_hash_algo *algo = repo->hash_algo;
+ const struct git_hash_algo *compat = repo->compat_hash_algo;
+ struct object_id compat_oid;
char hdr[MAX_HEADER_LEN];
int hdrlen = sizeof(hdr);
+ /* Generate compat_oid */
+ if (compat) {
+ if (compat_oid_in)
+ oidcpy(&compat_oid, compat_oid_in);
+ else if (type == OBJ_BLOB)
+ hash_object_file(compat, buf, len, type, &compat_oid);
+ else {
+ struct strbuf converted = STRBUF_INIT;
+ convert_object_file(&converted, algo, compat,
+ buf, len, type, 0);
+ hash_object_file(compat, converted.buf, converted.len,
+ type, &compat_oid);
+ strbuf_release(&converted);
+ }
+ }
+
/* Normally if we have it in the pack then we do not bother writing
* it out into .git/objects/??/?{38} file.
*/
- write_object_file_prepare(the_hash_algo, buf, len, type, oid, hdr,
- &hdrlen);
+ write_object_file_prepare(algo, buf, len, type, oid, hdr, &hdrlen);
if (freshen_packed_object(oid) || freshen_loose_object(oid))
return 0;
- return write_loose_object(oid, hdr, hdrlen, buf, len, 0, flags);
+ if (write_loose_object(oid, hdr, hdrlen, buf, len, 0, flags))
+ return -1;
+ if (compat)
+ return repo_add_loose_object_map(repo, oid, &compat_oid);
+ return 0;
}
int write_object_file_literally(const void *buf, unsigned long len,
@@ -2223,7 +2362,27 @@ int write_object_file_literally(const void *buf, unsigned long len,
unsigned flags)
{
char *header;
+ struct repository *repo = the_repository;
+ const struct git_hash_algo *algo = repo->hash_algo;
+ const struct git_hash_algo *compat = repo->compat_hash_algo;
+ struct object_id compat_oid;
int hdrlen, status = 0;
+ int compat_type = -1;
+
+ if (compat) {
+ compat_type = type_from_string_gently(type, -1, 1);
+ if (compat_type == OBJ_BLOB)
+ hash_object_file(compat, buf, len, compat_type,
+ &compat_oid);
+ else if (compat_type != -1) {
+ struct strbuf converted = STRBUF_INIT;
+ convert_object_file(&converted, algo, compat,
+ buf, len, compat_type, 0);
+ hash_object_file(compat, converted.buf, converted.len,
+ compat_type, &compat_oid);
+ strbuf_release(&converted);
+ }
+ }
/* type string, SP, %lu of the length plus NUL must fit this */
hdrlen = strlen(type) + MAX_HEADER_LEN;
@@ -2236,6 +2395,8 @@ int write_object_file_literally(const void *buf, unsigned long len,
if (freshen_packed_object(oid) || freshen_loose_object(oid))
goto cleanup;
status = write_loose_object(oid, header, hdrlen, buf, len, 0, 0);
+ if (compat_type != -1)
+ return repo_add_loose_object_map(repo, oid, &compat_oid);
cleanup:
free(header);
@@ -2244,9 +2405,12 @@ cleanup:
int force_object_loose(const struct object_id *oid, time_t mtime)
{
+ struct repository *repo = the_repository;
+ const struct git_hash_algo *compat = repo->compat_hash_algo;
void *buf;
unsigned long len;
struct object_info oi = OBJECT_INFO_INIT;
+ struct object_id compat_oid;
enum object_type type;
char hdr[MAX_HEADER_LEN];
int hdrlen;
@@ -2259,8 +2423,15 @@ int force_object_loose(const struct object_id *oid, time_t mtime)
oi.contentp = &buf;
if (oid_object_info_extended(the_repository, oid, &oi, 0))
return error(_("cannot read object for %s"), oid_to_hex(oid));
+ if (compat) {
+ if (repo_oid_to_algop(repo, oid, compat, &compat_oid))
+ return error(_("cannot map object %s to %s"),
+ oid_to_hex(oid), compat->name);
+ }
hdrlen = format_object_header(hdr, sizeof(hdr), type, len);
ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime, 0);
+ if (!ret && compat)
+ ret = repo_add_loose_object_map(the_repository, oid, &compat_oid);
free(buf);
return ret;
@@ -2310,12 +2481,13 @@ static int hash_format_check_report(struct fsck_options *opts UNUSED,
}
static int index_mem(struct index_state *istate,
- struct object_id *oid, void *buf, size_t size,
+ struct object_id *oid,
+ const void *buf, size_t size,
enum object_type type,
const char *path, unsigned flags)
{
+ struct strbuf nbuf = STRBUF_INIT;
int ret = 0;
- int re_allocated = 0;
int write_object = flags & HASH_WRITE_OBJECT;
if (!type)
@@ -2325,11 +2497,10 @@ static int index_mem(struct index_state *istate,
* Convert blobs to git internal format
*/
if ((type == OBJ_BLOB) && path) {
- struct strbuf nbuf = STRBUF_INIT;
if (convert_to_git(istate, path, buf, size, &nbuf,
get_conv_flags(flags))) {
- buf = strbuf_detach(&nbuf, &size);
- re_allocated = 1;
+ buf = nbuf.buf;
+ size = nbuf.len;
}
}
if (flags & HASH_FORMAT_CHECK) {
@@ -2346,8 +2517,8 @@ static int index_mem(struct index_state *istate,
ret = write_object_file(buf, size, type, oid);
else
hash_object_file(the_hash_algo, buf, size, type, oid);
- if (re_allocated)
- free(buf);
+
+ strbuf_release(&nbuf);
return ret;
}
@@ -2497,7 +2668,7 @@ int index_path(struct index_state *istate, struct object_id *oid,
strbuf_release(&sb);
break;
case S_IFDIR:
- return resolve_gitlink_ref(path, "HEAD", oid);
+ return repo_resolve_gitlink_ref(the_repository, path, "HEAD", oid);
default:
return error(_("%s: unsupported file type"), path);
}
@@ -2571,6 +2742,8 @@ int for_each_file_in_obj_subdir(unsigned int subdir_nr,
!hex_to_bytes(oid.hash + 1, de->d_name,
the_hash_algo->rawsz - 1)) {
oid_set_algo(&oid, the_hash_algo);
+ memset(oid.hash + the_hash_algo->rawsz, 0,
+ GIT_MAX_RAWSZ - the_hash_algo->rawsz);
if (obj_cb) {
r = obj_cb(&oid, path->buf, data);
if (r)
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-05 10:07:40 +0000