static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
struct object *obj, const char *name)
{
if (obj->type == OBJ_BLOB)
return grep_sha1(opt, obj->sha1, name, 0, NULL);
if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
struct tree_desc tree;
void *data;
unsigned long size;
struct strbuf base;
int hit, len;
grep_read_lock();
data = read_object_with_reference(obj->sha1, tree_type,
&size, NULL);
grep_read_unlock();
if (!data)
die(_("unable to read tree (%s)"), sha1_to_hex(obj->sha1));
len = name ? strlen(name) : 0;
strbuf_init(&base, PATH_MAX + len + 1);
if (len) {
strbuf_add(&base, name, len);
strbuf_addch(&base, ':');
}
init_tree_desc(&tree, data, size);
hit = grep_tree(opt, pathspec, &tree, &base, base.len,
obj->type == OBJ_COMMIT);
strbuf_release(&base);
free(data);
return hit;
}
die(_("unable to grep from object of type %s"), typename(obj->type));
}
static void *lock_and_read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
{
void *data;
grep_read_lock();
data = read_sha1_file(sha1, type, size);
grep_read_unlock();
return data;
}
static void *lock_and_read_oid_file(const struct object_id *oid, enum object_type *type, unsigned long *size)
{
void *data;
grep_read_lock();
data = read_sha1_file(oid->hash, type, size);
grep_read_unlock();
return data;
}
static int fill_textconv_grep(struct userdiff_driver *driver,
struct grep_source *gs)
{
struct diff_filespec *df;
char *buf;
size_t size;
if (!driver || !driver->textconv)
return grep_source_load(gs);
/*
* The textconv interface is intimately tied to diff_filespecs, so we
* have to pretend to be one. If we could unify the grep_source
* and diff_filespec structs, this mess could just go away.
*/
df = alloc_filespec(gs->path);
switch (gs->type) {
case GREP_SOURCE_SHA1:
fill_filespec(df, gs->identifier, 1, 0100644);
break;
case GREP_SOURCE_FILE:
fill_filespec(df, null_sha1, 0, 0100644);
break;
default:
die("BUG: attempt to textconv something without a path?");
}
/*
* fill_textconv is not remotely thread-safe; it may load objects
* behind the scenes, and it modifies the global diff tempfile
* structure.
*/
grep_read_lock();
size = fill_textconv(driver, df, &buf);
grep_read_unlock();
free_filespec(df);
/*
* The normal fill_textconv usage by the diff machinery would just keep
* the textconv'd buf separate from the diff_filespec. But much of the
* grep code passes around a grep_source and assumes that its "buf"
* pointer is the beginning of the thing we are searching. So let's
* install our textconv'd version into the grep_source, taking care not
* to leak any existing buffer.
*/
grep_source_clear_data(gs);
gs->buf = buf;
gs->size = size;
return 0;
}
static int grep_source_load_sha1(struct grep_source *gs)
{
enum object_type type;
grep_read_lock();
gs->buf = read_sha1_file(gs->identifier, &type, &gs->size);
grep_read_unlock();
if (!gs->buf)
return error(_("'%s': unable to read %s"),
gs->name,
sha1_to_hex(gs->identifier));
return 0;
}
static int grep_submodule(struct grep_opt *opt, struct repository *superproject,
const struct pathspec *pathspec,
const struct object_id *oid,
const char *filename, const char *path)
{
struct repository submodule;
int hit;
if (!is_submodule_active(superproject, path))
return 0;
if (repo_submodule_init(&submodule, superproject, path))
return 0;
repo_read_gitmodules(&submodule);
/*
* NEEDSWORK: This adds the submodule's object directory to the list of
* alternates for the single in-memory object store. This has some bad
* consequences for memory (processed objects will never be freed) and
* performance (this increases the number of pack files git has to pay
* attention to, to the sum of the number of pack files in all the
* repositories processed so far). This can be removed once the object
* store is no longer global and instead is a member of the repository
* object.
*/
grep_read_lock();
add_to_alternates_memory(submodule.objectdir);
grep_read_unlock();
if (oid) {
struct object *object;
struct tree_desc tree;
void *data;
unsigned long size;
struct strbuf base = STRBUF_INIT;
object = parse_object_or_die(oid, oid_to_hex(oid));
grep_read_lock();
data = read_object_with_reference(object->oid.hash, tree_type,
&size, NULL);
grep_read_unlock();
if (!data)
die(_("unable to read tree (%s)"), oid_to_hex(&object->oid));
strbuf_addstr(&base, filename);
strbuf_addch(&base, '/');
init_tree_desc(&tree, data, size);
hit = grep_tree(opt, pathspec, &tree, &base, base.len,
object->type == OBJ_COMMIT, &submodule);
strbuf_release(&base);
free(data);
} else {
hit = grep_cache(opt, &submodule, pathspec, 1);
}
repo_clear(&submodule);
return hit;
}