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sha1_file: add for_each iterators for loose and packed objects 

We typically iterate over the reachable objects in a
repository by starting at the tips and walking the graph.
There's no easy way to iterate over all of the objects,
including unreachable ones. Let's provide a way of doing so.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2014-10-15 18:41:21 -04:00 committed by Junio C Hamano
parent 4a1e693a30
commit 660c889e46
2 changed files with 73 additions and 0 deletions
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11
cache.h
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@ -1272,6 +1272,17 @@ int for_each_loose_file_in_objdir(const char *path,
each_loose_subdir_fn subdir_cb,
void *data);
/*
* Iterate over loose and packed objects in both the local
* repository and any alternates repositories.
*/
typedef int each_packed_object_fn(const unsigned char *sha1,
struct packed_git *pack,
uint32_t pos,
void *data);
extern int for_each_loose_object(each_loose_object_fn, void *);
extern int for_each_packed_object(each_packed_object_fn, void *);
struct object_info {
/* Request */
enum object_type *typep;

62
sha1_file.c
View File

@ -3348,3 +3348,65 @@ int for_each_loose_file_in_objdir(const char *path,
strbuf_release(&buf);
return r;
}
struct loose_alt_odb_data {
each_loose_object_fn *cb;
void *data;
};
static int loose_from_alt_odb(struct alternate_object_database *alt,
void *vdata)
{
struct loose_alt_odb_data *data = vdata;
return for_each_loose_file_in_objdir(alt->base,
data->cb, NULL, NULL,
data->data);
}
int for_each_loose_object(each_loose_object_fn cb, void *data)
{
struct loose_alt_odb_data alt;
int r;
r = for_each_loose_file_in_objdir(get_object_directory(),
cb, NULL, NULL, data);
if (r)
return r;
alt.cb = cb;
alt.data = data;
return foreach_alt_odb(loose_from_alt_odb, &alt);
}
static int for_each_object_in_pack(struct packed_git *p, each_packed_object_fn cb, void *data)
{
uint32_t i;
int r = 0;
for (i = 0; i < p->num_objects; i++) {
const unsigned char *sha1 = nth_packed_object_sha1(p, i);
if (!sha1)
return error("unable to get sha1 of object %u in %s",
i, p->pack_name);
r = cb(sha1, p, i, data);
if (r)
break;
}
return r;
}
int for_each_packed_object(each_packed_object_fn cb, void *data)
{
struct packed_git *p;
int r = 0;
prepare_packed_git();
for (p = packed_git; p; p = p->next) {
r = for_each_object_in_pack(p, cb, data);
if (r)
break;
}
return r;
}