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authorStefan Beller <sbeller@google.com>2018-04-25 18:21:06 (GMT)
committerJunio C Hamano <gitster@pobox.com>2018-04-26 01:54:28 (GMT)
commit9d98354f48997faf8251c566d909957f6ae427d5 (patch)
treedb9184ba03360fb7ccf302ad8de009f1027175aa
parent589de911852cc3ce689fa3702ecb54c0049aeec1 (diff)
downloadgit-9d98354f48997faf8251c566d909957f6ae427d5.zip
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cache.h: allow oid_object_info to handle arbitrary repositories
This involves also adapting oid_object_info_extended and a some internal functions that are used to implement these. It all has to happen in one patch, because of a single recursive chain of calls visits all these functions. oid_object_info_extended is also used in partial clones, which allow fetching missing objects. As this series will not add the repository struct to the transport code and fetch_object(), add a TODO note and omit fetching if a user tries to use a partial clone in a repository other than the_repository. Among the functions modified to handle arbitrary repositories, unpack_entry() is one of them. Note that it still references the globals "delta_base_cache" and "delta_base_cached", but those are safe to be referenced (the former is indexed partly by "struct packed_git *", which is repo-specific, and the latter is only used to limit the size of the former as an optimization). Helped-by: Brandon Williams <bmwill@google.com> Helped-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Stefan Beller <sbeller@google.com> Reviewed-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--cache.h9
-rw-r--r--packfile.c58
-rw-r--r--packfile.h8
-rw-r--r--sha1_file.c31
4 files changed, 54 insertions, 52 deletions
diff --git a/cache.h b/cache.h
index 6340b2c..3a4d80e 100644
--- a/cache.h
+++ b/cache.h
@@ -1192,8 +1192,7 @@ static inline void *read_object_file(const struct object_id *oid, enum object_ty
}
/* Read and unpack an object file into memory, write memory to an object file */
-#define oid_object_info(r, o, f) oid_object_info_##r(o, f)
-int oid_object_info_the_repository(const struct object_id *, unsigned long *);
+int oid_object_info(struct repository *r, const struct object_id *, unsigned long *);
extern int hash_object_file(const void *buf, unsigned long len,
const char *type, struct object_id *oid);
@@ -1675,9 +1674,9 @@ struct object_info {
/* Do not check loose object */
#define OBJECT_INFO_IGNORE_LOOSE 16
-#define oid_object_info_extended(r, oid, oi, flags) \
- oid_object_info_extended_##r(oid, oi, flags)
-int oid_object_info_extended_the_repository(const struct object_id *, struct object_info *, unsigned flags);
+int oid_object_info_extended(struct repository *r,
+ const struct object_id *,
+ struct object_info *, unsigned flags);
/*
* Set this to 0 to prevent sha1_object_info_extended() from fetching missing
diff --git a/packfile.c b/packfile.c
index 8de87f9..55d383e 100644
--- a/packfile.c
+++ b/packfile.c
@@ -1104,9 +1104,9 @@ static const unsigned char *get_delta_base_sha1(struct packed_git *p,
return NULL;
}
-#define retry_bad_packed_offset(r, p, o) \
- retry_bad_packed_offset_##r(p, o)
-static int retry_bad_packed_offset_the_repository(struct packed_git *p, off_t obj_offset)
+static int retry_bad_packed_offset(struct repository *r,
+ struct packed_git *p,
+ off_t obj_offset)
{
int type;
struct revindex_entry *revidx;
@@ -1116,7 +1116,7 @@ static int retry_bad_packed_offset_the_repository(struct packed_git *p, off_t ob
return OBJ_BAD;
nth_packed_object_oid(&oid, p, revidx->nr);
mark_bad_packed_object(p, oid.hash);
- type = oid_object_info(the_repository, &oid, NULL);
+ type = oid_object_info(r, &oid, NULL);
if (type <= OBJ_NONE)
return OBJ_BAD;
return type;
@@ -1124,13 +1124,12 @@ static int retry_bad_packed_offset_the_repository(struct packed_git *p, off_t ob
#define POI_STACK_PREALLOC 64
-#define packed_to_object_type(r, p, o, t, w, c) \
- packed_to_object_type_##r(p, o, t, w, c)
-static enum object_type packed_to_object_type_the_repository(struct packed_git *p,
- off_t obj_offset,
- enum object_type type,
- struct pack_window **w_curs,
- off_t curpos)
+static enum object_type packed_to_object_type(struct repository *r,
+ struct packed_git *p,
+ off_t obj_offset,
+ enum object_type type,
+ struct pack_window **w_curs,
+ off_t curpos)
{
off_t small_poi_stack[POI_STACK_PREALLOC];
off_t *poi_stack = small_poi_stack;
@@ -1157,7 +1156,7 @@ static enum object_type packed_to_object_type_the_repository(struct packed_git *
if (type <= OBJ_NONE) {
/* If getting the base itself fails, we first
* retry the base, otherwise unwind */
- type = retry_bad_packed_offset(the_repository, p, base_offset);
+ type = retry_bad_packed_offset(r, p, base_offset);
if (type > OBJ_NONE)
goto out;
goto unwind;
@@ -1185,7 +1184,7 @@ out:
unwind:
while (poi_stack_nr) {
obj_offset = poi_stack[--poi_stack_nr];
- type = retry_bad_packed_offset(the_repository, p, obj_offset);
+ type = retry_bad_packed_offset(r, p, obj_offset);
if (type > OBJ_NONE)
goto out;
}
@@ -1272,15 +1271,15 @@ static void detach_delta_base_cache_entry(struct delta_base_cache_entry *ent)
free(ent);
}
-#define cache_or_unpack_entry(r, p, bo, bs, t) cache_or_unpack_entry_##r(p, bo, bs, t)
-static void *cache_or_unpack_entry_the_repository(struct packed_git *p, off_t base_offset,
- unsigned long *base_size, enum object_type *type)
+static void *cache_or_unpack_entry(struct repository *r, struct packed_git *p,
+ off_t base_offset, unsigned long *base_size,
+ enum object_type *type)
{
struct delta_base_cache_entry *ent;
ent = get_delta_base_cache_entry(p, base_offset);
if (!ent)
- return unpack_entry(the_repository, p, base_offset, type, base_size);
+ return unpack_entry(r, p, base_offset, type, base_size);
if (type)
*type = ent->type;
@@ -1334,8 +1333,8 @@ static void add_delta_base_cache(struct packed_git *p, off_t base_offset,
hashmap_add(&delta_base_cache, ent);
}
-int packed_object_info_the_repository(struct packed_git *p, off_t obj_offset,
- struct object_info *oi)
+int packed_object_info(struct repository *r, struct packed_git *p,
+ off_t obj_offset, struct object_info *oi)
{
struct pack_window *w_curs = NULL;
unsigned long size;
@@ -1347,7 +1346,7 @@ int packed_object_info_the_repository(struct packed_git *p, off_t obj_offset,
* a "real" type later if the caller is interested.
*/
if (oi->contentp) {
- *oi->contentp = cache_or_unpack_entry(the_repository, p, obj_offset, oi->sizep,
+ *oi->contentp = cache_or_unpack_entry(r, p, obj_offset, oi->sizep,
&type);
if (!*oi->contentp)
type = OBJ_BAD;
@@ -1381,7 +1380,7 @@ int packed_object_info_the_repository(struct packed_git *p, off_t obj_offset,
if (oi->typep || oi->type_name) {
enum object_type ptot;
- ptot = packed_to_object_type(the_repository, p, obj_offset,
+ ptot = packed_to_object_type(r, p, obj_offset,
type, &w_curs, curpos);
if (oi->typep)
*oi->typep = ptot;
@@ -1470,10 +1469,10 @@ struct unpack_entry_stack_ent {
unsigned long size;
};
-#define read_object(r, o, t, s) read_object_##r(o, t, s)
-static void *read_object_the_repository(const struct object_id *oid,
- enum object_type *type,
- unsigned long *size)
+static void *read_object(struct repository *r,
+ const struct object_id *oid,
+ enum object_type *type,
+ unsigned long *size)
{
struct object_info oi = OBJECT_INFO_INIT;
void *content;
@@ -1481,14 +1480,13 @@ static void *read_object_the_repository(const struct object_id *oid,
oi.sizep = size;
oi.contentp = &content;
- if (oid_object_info_extended(the_repository, oid, &oi, 0) < 0)
+ if (oid_object_info_extended(r, oid, &oi, 0) < 0)
return NULL;
return content;
}
-void *unpack_entry_the_repository(struct packed_git *p, off_t obj_offset,
- enum object_type *final_type,
- unsigned long *final_size)
+void *unpack_entry(struct repository *r, struct packed_git *p, off_t obj_offset,
+ enum object_type *final_type, unsigned long *final_size)
{
struct pack_window *w_curs = NULL;
off_t curpos = obj_offset;
@@ -1618,7 +1616,7 @@ void *unpack_entry_the_repository(struct packed_git *p, off_t obj_offset,
oid_to_hex(&base_oid), (uintmax_t)obj_offset,
p->pack_name);
mark_bad_packed_object(p, base_oid.hash);
- base = read_object(the_repository, &base_oid, &type, &base_size);
+ base = read_object(r, &base_oid, &type, &base_size);
external_base = base;
}
}
diff --git a/packfile.h b/packfile.h
index 1efa57a..fdfddb8 100644
--- a/packfile.h
+++ b/packfile.h
@@ -115,8 +115,7 @@ extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);
extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
extern int is_pack_valid(struct packed_git *);
-#define unpack_entry(r, p, of, ot, s) unpack_entry_##r(p, of, ot, s)
-extern void *unpack_entry_the_repository(struct packed_git *, off_t, enum object_type *, unsigned long *);
+extern void *unpack_entry(struct repository *r, struct packed_git *, off_t, enum object_type *, unsigned long *);
extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
@@ -126,8 +125,9 @@ extern void release_pack_memory(size_t);
/* global flag to enable extra checks when accessing packed objects */
extern int do_check_packed_object_crc;
-#define packed_object_info(r, p, o, oi) packed_object_info_##r(p, o, oi)
-extern int packed_object_info_the_repository(struct packed_git *pack, off_t offset, struct object_info *);
+extern int packed_object_info(struct repository *r,
+ struct packed_git *pack,
+ off_t offset, struct object_info *);
extern void mark_bad_packed_object(struct packed_git *p, const unsigned char *sha1);
extern const struct packed_git *has_packed_and_bad(const unsigned char *sha1);
diff --git a/sha1_file.c b/sha1_file.c
index 746ff82..dcd6b87 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1231,7 +1231,8 @@ static int sha1_loose_object_info(struct repository *r,
int fetch_if_missing = 1;
-int oid_object_info_extended_the_repository(const struct object_id *oid, struct object_info *oi, unsigned flags)
+int oid_object_info_extended(struct repository *r, const struct object_id *oid,
+ struct object_info *oi, unsigned flags)
{
static struct object_info blank_oi = OBJECT_INFO_INIT;
struct pack_entry e;
@@ -1240,7 +1241,7 @@ int oid_object_info_extended_the_repository(const struct object_id *oid, struct
int already_retried = 0;
if (flags & OBJECT_INFO_LOOKUP_REPLACE)
- real = lookup_replace_object(the_repository, oid);
+ real = lookup_replace_object(r, oid);
if (is_null_oid(real))
return -1;
@@ -1269,29 +1270,31 @@ int oid_object_info_extended_the_repository(const struct object_id *oid, struct
}
while (1) {
- if (find_pack_entry(the_repository, real->hash, &e))
+ if (find_pack_entry(r, real->hash, &e))
break;
if (flags & OBJECT_INFO_IGNORE_LOOSE)
return -1;
/* Most likely it's a loose object. */
- if (!sha1_loose_object_info(the_repository, real->hash, oi, flags))
+ if (!sha1_loose_object_info(r, real->hash, oi, flags))
return 0;
/* Not a loose object; someone else may have just packed it. */
if (!(flags & OBJECT_INFO_QUICK)) {
- reprepare_packed_git(the_repository);
- if (find_pack_entry(the_repository, real->hash, &e))
+ reprepare_packed_git(r);
+ if (find_pack_entry(r, real->hash, &e))
break;
}
/* Check if it is a missing object */
if (fetch_if_missing && repository_format_partial_clone &&
- !already_retried) {
+ !already_retried && r == the_repository) {
/*
- * TODO Investigate haveing fetch_object() return
+ * TODO Investigate having fetch_object() return
* TODO error/success and stopping the music here.
+ * TODO Pass a repository struct through fetch_object,
+ * such that arbitrary repositories work.
*/
fetch_object(repository_format_partial_clone, real->hash);
already_retried = 1;
@@ -1307,10 +1310,10 @@ int oid_object_info_extended_the_repository(const struct object_id *oid, struct
* information below, so return early.
*/
return 0;
- rtype = packed_object_info(the_repository, e.p, e.offset, oi);
+ rtype = packed_object_info(r, e.p, e.offset, oi);
if (rtype < 0) {
mark_bad_packed_object(e.p, real->hash);
- return oid_object_info_extended(the_repository, real, oi, 0);
+ return oid_object_info_extended(r, real, oi, 0);
} else if (oi->whence == OI_PACKED) {
oi->u.packed.offset = e.offset;
oi->u.packed.pack = e.p;
@@ -1322,15 +1325,17 @@ int oid_object_info_extended_the_repository(const struct object_id *oid, struct
}
/* returns enum object_type or negative */
-int oid_object_info_the_repository(const struct object_id *oid, unsigned long *sizep)
+int oid_object_info(struct repository *r,
+ const struct object_id *oid,
+ unsigned long *sizep)
{
enum object_type type;
struct object_info oi = OBJECT_INFO_INIT;
oi.typep = &type;
oi.sizep = sizep;
- if (oid_object_info_extended(the_repository, oid, &oi,
- OBJECT_INFO_LOOKUP_REPLACE) < 0)
+ if (oid_object_info_extended(r, oid, &oi,
+ OBJECT_INFO_LOOKUP_REPLACE) < 0)
return -1;
return type;
}