static VALUE
backend_read_blob(VALUE rb_obj, VALUE rb_oid) {
git_oid oid;
git_odb *odb;
git_odb_object *g_obj;
git_otype type;
int error, size;
char *data;
VALUE rb_content;
odb = DATA_PTR(rb_obj);
error = git_oid_fromstr(&oid, RSTRING_PTR(rb_oid));
backend_exception_check(error);
error = git_odb_read(&g_obj, odb, &oid);
backend_exception_check(error);
data = (char *)git_odb_object_data(g_obj);
size = git_odb_object_size(g_obj);
type = git_odb_object_type(g_obj);
if (type != GIT_OBJ_BLOB) {
git_odb_object_free(g_obj);
rb_raise(rb_eArgError, "oid does not belong to a blob");
}
rb_content = backend_str_new(data, size, NULL);
git_odb_object_free(g_obj);
return rb_content;
}
int
py_oid_to_git_oid_expand(git_repository *repo, PyObject *py_str, git_oid *oid)
{
int err;
size_t len;
git_odb *odb = NULL;
git_odb_object *obj = NULL;
len = py_oid_to_git_oid(py_str, oid);
if (len == 0)
return -1;
if (len == GIT_OID_HEXSZ)
return 0;
/* Short oid */
err = git_repository_odb(&odb, repo);
if (err < 0)
goto error;
err = git_odb_read_prefix(&obj, odb, oid, len);
if (err < 0)
goto error;
git_oid_cpy(oid, git_odb_object_id(obj));
git_odb_object_free(obj);
git_odb_free(odb);
return 0;
error:
git_odb_object_free(obj);
git_odb_free(odb);
Error_set(err);
return -1;
}
static void *cache_raw(void *arg)
{
int i;
git_oid oid;
git_odb *odb;
git_odb_object *odb_obj;
cl_git_pass(git_repository_odb(&odb, g_repo));
for (i = ((int *)arg)[1]; g_data[i].sha != NULL; i += 2) {
cl_git_pass(git_oid_fromstr(&oid, g_data[i].sha));
cl_git_pass(git_odb_read(&odb_obj, odb, &oid));
cl_assert(g_data[i].type == git_odb_object_type(odb_obj));
git_odb_object_free(odb_obj);
}
for (i = 0; i < ((int *)arg)[1]; i += 2) {
cl_git_pass(git_oid_fromstr(&oid, g_data[i].sha));
cl_git_pass(git_odb_read(&odb_obj, odb, &oid));
cl_assert(g_data[i].type == git_odb_object_type(odb_obj));
git_odb_object_free(odb_obj);
}
git_odb_free(odb);
return arg;
}
PyObject *
Repository_read(Repository *self, PyObject *py_hex)
{
git_oid oid;
git_odb_object *obj;
int len;
PyObject* tuple;
len = py_str_to_git_oid(py_hex, &oid);
if (len < 0)
return NULL;
obj = Repository_read_raw(self->repo, &oid, len);
if (obj == NULL)
return NULL;
tuple = Py_BuildValue(
"(ns#)",
git_odb_object_type(obj),
git_odb_object_data(obj),
git_odb_object_size(obj));
git_odb_object_free(obj);
return tuple;
}
PyObject *
Repository_read(Repository *self, PyObject *py_hex)
{
git_oid oid;
git_odb_object *obj;
size_t len;
PyObject* tuple;
len = py_oid_to_git_oid(py_hex, &oid);
if (len == 0)
return NULL;
obj = Repository_read_raw(self->repo, &oid, len);
if (obj == NULL)
return NULL;
tuple = Py_BuildValue(
#if PY_MAJOR_VERSION == 2
"(ns#)",
#else
"(ny#)",
#endif
git_odb_object_type(obj),
git_odb_object_data(obj),
git_odb_object_size(obj));
git_odb_object_free(obj);
return tuple;
}
void git_blob__free(void *_blob)
{
git_blob *blob = (git_blob *) _blob;
if (!blob->raw)
git_odb_object_free(blob->data.odb);
git__free(blob);
}
int
Repository_contains(Repository *self, PyObject *value)
{
git_oid oid;
git_odb *odb;
int err, len, exists;
len = py_str_to_git_oid(value, &oid);
if (len < 0)
return -1;
err = git_repository_odb(&odb, self->repo);
if (err < 0) {
Error_set(err);
return -1;
}
if (len < GIT_OID_HEXSZ) {
git_odb_object *obj = NULL;
err = git_odb_read_prefix(&obj, odb, &oid, len);
if (err < 0 && err != GIT_ENOTFOUND) {
Error_set(err);
exists = -1;
} else {
exists = (err == 0);
if (obj)
git_odb_object_free(obj);
}
} else {
exists = git_odb_exists(odb, &oid);
}
git_odb_free(odb);
return exists;
}
int
py_str_to_git_oid_expand(git_repository *repo, PyObject *py_str, git_oid *oid)
{
int err;
int len;
git_odb *odb;
git_odb_object *obj;
len = py_str_to_git_oid(py_str, oid);
if (len == GIT_OID_HEXSZ || len < 0)
return len;
err = git_repository_odb(&odb, repo);
if (err < 0) {
Error_set(err);
return -1;
}
err = git_odb_read_prefix(&obj, odb, oid, len);
if (err < 0) {
git_odb_free(odb);
Error_set(err);
return err;
}
git_oid_cpy(oid, git_odb_object_id(obj));
git_odb_object_free(obj);
git_odb_free(odb);
return 0;
}
void test_odb_mixed__dup_oid(void) {
const char hex[] = "ce013625030ba8dba906f756967f9e9ca394464a";
const char short_hex[] = "ce01362";
git_oid oid;
git_odb_object *obj;
cl_git_pass(git_oid_fromstr(&oid, hex));
cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, GIT_OID_HEXSZ));
git_odb_object_free(obj);
cl_git_pass(git_odb_exists_prefix(NULL, _odb, &oid, GIT_OID_HEXSZ));
cl_git_pass(git_oid_fromstrn(&oid, short_hex, sizeof(short_hex) - 1));
cl_git_pass(git_odb_read_prefix(&obj, _odb, &oid, sizeof(short_hex) - 1));
git_odb_object_free(obj);
cl_git_pass(git_odb_exists_prefix(NULL, _odb, &oid, sizeof(short_hex) - 1));
}
int git_odb_read_header(size_t *len_p, git_otype *type_p, git_odb *db, const git_oid *id)
{
int error;
git_odb_object *object;
error = git_odb__read_header_or_object(&object, len_p, type_p, db, id);
if (object)
git_odb_object_free(object);
return error;
}
void test_object_cache__cache_everything(void)
{
int i, start;
git_oid oid;
git_odb_object *odb_obj;
git_object *obj;
git_odb *odb;
git_libgit2_opts(
GIT_OPT_SET_CACHE_OBJECT_LIMIT, (int)GIT_OBJ_BLOB, (size_t)32767);
cl_git_pass(git_repository_open(&g_repo, cl_fixture("testrepo.git")));
cl_git_pass(git_repository_odb(&odb, g_repo));
start = (int)git_cache_size(&g_repo->objects);
for (i = 0; g_data[i].sha != NULL; ++i) {
int count = (int)git_cache_size(&g_repo->objects);
cl_git_pass(git_oid_fromstr(&oid, g_data[i].sha));
/* alternate between loading raw and parsed objects */
if ((i & 1) == 0) {
cl_git_pass(git_odb_read(&odb_obj, odb, &oid));
cl_assert(g_data[i].type == git_odb_object_type(odb_obj));
git_odb_object_free(odb_obj);
} else {
cl_git_pass(git_object_lookup(&obj, g_repo, &oid, GIT_OBJ_ANY));
cl_assert(g_data[i].type == git_object_type(obj));
git_object_free(obj);
}
cl_assert_equal_i(count + 1, (int)git_cache_size(&g_repo->objects));
}
cl_assert_equal_i(i, (int)git_cache_size(&g_repo->objects) - start);
git_odb_free(odb);
for (i = 0; g_data[i].sha != NULL; ++i) {
int count = (int)git_cache_size(&g_repo->objects);
cl_git_pass(git_oid_fromstr(&oid, g_data[i].sha));
cl_git_pass(git_object_lookup(&obj, g_repo, &oid, GIT_OBJ_ANY));
cl_assert(g_data[i].type == git_object_type(obj));
git_object_free(obj);
cl_assert_equal_i(count, (int)git_cache_size(&g_repo->objects));
}
}
void test_odb_packed__mass_read(void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(packed_objects); ++i) {
git_oid id;
git_odb_object *obj;
cl_git_pass(git_oid_fromstr(&id, packed_objects[i]));
cl_assert(git_odb_exists(_odb, &id) == 1);
cl_git_pass(git_odb_read(&obj, _odb, &id));
git_odb_object_free(obj);
}
}
static int diff_file_content_load_blob(git_diff_file_content *fc)
{
int error = 0;
git_odb_object *odb_obj = NULL;
if (git_oid_iszero(&fc->file->oid))
return 0;
if (fc->file->mode == GIT_FILEMODE_COMMIT)
return diff_file_content_commit_to_str(fc, false);
/* if we don't know size, try to peek at object header first */
if (!fc->file->size) {
git_odb *odb;
size_t len;
git_otype type;
if (!(error = git_repository_odb__weakptr(&odb, fc->repo))) {
error = git_odb__read_header_or_object(
&odb_obj, &len, &type, odb, &fc->file->oid);
git_odb_free(odb);
}
if (error)
return error;
fc->file->size = len;
}
if (diff_file_content_binary_by_size(fc))
return 0;
if (odb_obj != NULL) {
error = git_object__from_odb_object(
(git_object **)&fc->blob, fc->repo, odb_obj, GIT_OBJ_BLOB);
git_odb_object_free(odb_obj);
} else {
error = git_blob_lookup(
(git_blob **)&fc->blob, fc->repo, &fc->file->oid);
}
if (!error) {
fc->flags |= GIT_DIFF_FLAG__FREE_BLOB;
fc->map.data = (void *)git_blob_rawcontent(fc->blob);
fc->map.len = (size_t)git_blob_rawsize(fc->blob);
}
return error;
}
static void test_read_object(object_data *data)
{
git_oid id;
git_odb_object *obj;
git_odb *odb;
write_object_files(data);
cl_git_pass(git_odb_open(&odb, "test-objects"));
cl_git_pass(git_oid_fromstr(&id, data->id));
cl_git_pass(git_odb_read(&obj, odb, &id));
cmp_objects((git_rawobj *)&obj->raw, data);
git_odb_object_free(obj);
git_odb_free(odb);
}
void test_odb_largefiles__read_into_memory_rejected_on_32bit(void)
{
git_oid oid;
git_odb_object *obj = NULL;
#ifdef GIT_ARCH_64
cl_skip();
#endif
if (!cl_is_env_set("GITTEST_INVASIVE_FS_SIZE") ||
!cl_is_env_set("GITTEST_INVASIVE_MEMORY") ||
!cl_is_env_set("GITTEST_SLOW"))
cl_skip();
writefile(&oid);
cl_git_fail(git_odb_read(&obj, odb, &oid));
git_odb_object_free(obj);
}
PyObject *
Object_read_raw(Object *self)
{
const git_oid *oid;
git_odb_object *obj;
PyObject *aux;
oid = git_object_id(self->obj);
obj = Repository_read_raw(self->repo->repo, oid, GIT_OID_HEXSZ);
if (obj == NULL)
return NULL;
aux = PyBytes_FromStringAndSize(
git_odb_object_data(obj),
git_odb_object_size(obj));
git_odb_object_free(obj);
return aux;
}
int git_commit_list_parse(git_revwalk *walk, git_commit_list_node *commit)
{
git_odb_object *obj;
int error;
if (commit->parsed)
return 0;
if ((error = git_odb_read(&obj, walk->odb, &commit->oid)) < 0)
return error;
if (obj->raw.type != GIT_OBJ_COMMIT) {
giterr_set(GITERR_INVALID, "Object is no commit object");
error = -1;
} else
error = commit_quick_parse(walk, commit, &obj->raw);
git_odb_object_free(obj);
return error;
}
static int diff_file_content_load_blob(
git_diff_file_content *fc,
git_diff_options *opts)
{
int error = 0;
git_odb_object *odb_obj = NULL;
if (git_oid_iszero(&fc->file->id))
return 0;
if (fc->file->mode == GIT_FILEMODE_COMMIT)
return diff_file_content_commit_to_str(fc, false);
/* if we don't know size, try to peek at object header first */
if (!fc->file->size) {
if ((error = git_diff_file__resolve_zero_size(
fc->file, &odb_obj, fc->repo)) < 0)
return error;
}
if ((opts->flags & GIT_DIFF_SHOW_BINARY) == 0 &&
diff_file_content_binary_by_size(fc))
return 0;
if (odb_obj != NULL) {
error = git_object__from_odb_object(
(git_object **)&fc->blob, fc->repo, odb_obj, GIT_OBJECT_BLOB);
git_odb_object_free(odb_obj);
} else {
error = git_blob_lookup(
(git_blob **)&fc->blob, fc->repo, &fc->file->id);
}
if (!error) {
fc->flags |= GIT_DIFF_FLAG__FREE_BLOB;
fc->map.data = (void *)git_blob_rawcontent(fc->blob);
fc->map.len = (size_t)git_blob_rawsize(fc->blob);
}
return error;
}
void test_odb_packed__read_header_0(void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(packed_objects); ++i) {
git_oid id;
git_odb_object *obj;
size_t len;
git_object_t type;
cl_git_pass(git_oid_fromstr(&id, packed_objects[i]));
cl_git_pass(git_odb_read(&obj, _odb, &id));
cl_git_pass(git_odb_read_header(&len, &type, _odb, &id));
cl_assert(obj->cached.size == len);
cl_assert(obj->cached.type == type);
git_odb_object_free(obj);
}
}
static gboolean
checksum_object_id (struct TreeWalkData *twdata,
const git_oid *oid,
GError **error)
{
gboolean ret = FALSE;
int r;
git_odb_object *odbobj = NULL;
r = git_odb_read (&odbobj, twdata->odb, oid);
if (!handle_libgit_ret (r, error))
goto out;
checksum_odb_object (twdata->evtag, odbobj);
ret = TRUE;
out:
if (odbobj)
git_odb_object_free (odbobj);
return ret;
}
static void test_read_object(object_data *data)
{
git_oid id;
git_odb_object *obj;
git_odb *odb;
git_rawobj tmp;
write_object_files(data);
cl_git_pass(git_odb_open(&odb, "test-objects"));
cl_git_pass(git_oid_fromstr(&id, data->id));
cl_git_pass(git_odb_read(&obj, odb, &id));
tmp.data = obj->buffer;
tmp.len = obj->cached.size;
tmp.type = obj->cached.type;
cmp_objects(&tmp, data);
git_odb_object_free(obj);
git_odb_free(odb);
}
int each_object(const git_oid *id, void *payload){
struct pl *p=payload;
git_odb_object *out;
check_error(git_odb_read(&out,p->odb,id),"odb_read");
struct object *oo=(struct object *)malloc(sizeof(struct object));
oo->size=git_odb_object_size(out);
git_oid_tostr(oo->strid,GIT_OID_HEXSZ+1,id);
/*
if(osize>1024*1024) {
osize /= 1024 *1024;
uom='M';
} else if (osize > 10*1024){
osize /= 1024;
uom='K';
}*/
oo->otype=git_odb_object_type(out);
git_odb_object_free(out);
ary_add(p->ary,(void*)oo);
//printf("%05d: %s %5ld%c %s\n",p->count++,strid,osize,uom,git_object_type2string(otype));
return 0;
}
int git_odb_exists(git_odb *db, const git_oid *id)
{
git_odb_object *object;
size_t i;
bool found = false;
assert(db && id);
if ((object = git_cache_get_raw(odb_cache(db), id)) != NULL) {
git_odb_object_free(object);
return (int)true;
}
for (i = 0; i < db->backends.length && !found; ++i) {
backend_internal *internal = (backend_internal *) git_vector_get(&db->backends, i);
git_odb_backend *b = internal->backend;
if (b->exists != NULL)
found = (bool)b->exists(b, id);
}
return (int)found;
}
void test_odb_packed__read_header_1(void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(loose_objects); ++i) {
git_oid id;
git_odb_object *obj;
size_t len;
git_otype type;
cl_git_pass(git_oid_fromstr(&id, loose_objects[i]));
cl_assert(git_odb_exists(_odb, &id) == 1);
cl_git_pass(git_odb_read(&obj, _odb, &id));
cl_git_pass(git_odb_read_header(&len, &type, _odb, &id));
cl_assert(obj->raw.len == len);
cl_assert(obj->raw.type == type);
git_odb_object_free(obj);
}
}
int git_commit_extract_signature(git_buf *signature, git_buf *signed_data, git_repository *repo, git_oid *commit_id, const char *field)
{
git_odb_object *obj;
git_odb *odb;
const char *buf;
const char *h, *eol;
int error;
git_buf_clear(signature);
git_buf_clear(signed_data);
if (!field)
field = "gpgsig";
if ((error = git_repository_odb__weakptr(&odb, repo)) < 0)
return error;
if ((error = git_odb_read(&obj, odb, commit_id)) < 0)
return error;
if (obj->cached.type != GIT_OBJECT_COMMIT) {
giterr_set(GITERR_INVALID, "the requested type does not match the type in ODB");
error = GIT_ENOTFOUND;
goto cleanup;
}
buf = git_odb_object_data(obj);
while ((h = strchr(buf, '\n')) && h[1] != '\0') {
h++;
if (git__prefixcmp(buf, field)) {
if (git_buf_put(signed_data, buf, h - buf) < 0)
return -1;
buf = h;
continue;
}
h = buf;
h += strlen(field);
eol = strchr(h, '\n');
if (h[0] != ' ') {
buf = h;
continue;
}
if (!eol)
goto malformed;
h++; /* skip the SP */
git_buf_put(signature, h, eol - h);
if (git_buf_oom(signature))
goto oom;
/* If the next line starts with SP, it's multi-line, we must continue */
while (eol[1] == ' ') {
git_buf_putc(signature, '\n');
h = eol + 2;
eol = strchr(h, '\n');
if (!eol)
goto malformed;
git_buf_put(signature, h, eol - h);
}
if (git_buf_oom(signature))
goto oom;
error = git_buf_puts(signed_data, eol+1);
git_odb_object_free(obj);
return error;
}
giterr_set(GITERR_OBJECT, "this commit is not signed");
error = GIT_ENOTFOUND;
goto cleanup;
malformed:
giterr_set(GITERR_OBJECT, "malformed header");
error = -1;
goto cleanup;
oom:
giterr_set_oom();
error = -1;
goto cleanup;
cleanup:
git_odb_object_free(obj);
git_buf_clear(signature);
git_buf_clear(signed_data);
return error;
}
int main (int argc, char** argv)
{
// ### Opening the Repository
// There are a couple of methods for opening a repository, this being the simplest.
// There are also [methods][me] for specifying the index file and work tree locations, here
// we are assuming they are in the normal places.
//
// [me]: http://libgit2.github.com/libgit2/#HEAD/group/repository
git_repository *repo;
if (argc > 1) {
git_repository_open(&repo, argv[1]);
} else {
git_repository_open(&repo, "/opt/libgit2-test/.git");
}
// ### SHA-1 Value Conversions
// For our first example, we will convert a 40 character hex value to the 20 byte raw SHA1 value.
printf("*Hex to Raw*\n");
char hex[] = "fd6e612585290339ea8bf39c692a7ff6a29cb7c3";
// The `git_oid` is the structure that keeps the SHA value. We will use this throughout the example
// for storing the value of the current SHA key we're working with.
git_oid oid;
git_oid_fromstr(&oid, hex);
// Once we've converted the string into the oid value, we can get the raw value of the SHA.
printf("Raw 20 bytes: [%.20s]\n", (&oid)->id);
// Next we will convert the 20 byte raw SHA1 value to a human readable 40 char hex value.
printf("\n*Raw to Hex*\n");
char out[41];
out[40] = '\0';
// If you have a oid, you can easily get the hex value of the SHA as well.
git_oid_fmt(out, &oid);
printf("SHA hex string: %s\n", out);
// ### Working with the Object Database
// **libgit2** provides [direct access][odb] to the object database.
// The object database is where the actual objects are stored in Git. For
// working with raw objects, we'll need to get this structure from the
// repository.
// [odb]: http://libgit2.github.com/libgit2/#HEAD/group/odb
git_odb *odb;
git_repository_odb(&odb, repo);
// #### Raw Object Reading
printf("\n*Raw Object Read*\n");
git_odb_object *obj;
git_otype otype;
const unsigned char *data;
const char *str_type;
int error;
// We can read raw objects directly from the object database if we have the oid (SHA)
// of the object. This allows us to access objects without knowing thier type and inspect
// the raw bytes unparsed.
error = git_odb_read(&obj, odb, &oid);
// A raw object only has three properties - the type (commit, blob, tree or tag), the size
// of the raw data and the raw, unparsed data itself. For a commit or tag, that raw data
// is human readable plain ASCII text. For a blob it is just file contents, so it could be
// text or binary data. For a tree it is a special binary format, so it's unlikely to be
// hugely helpful as a raw object.
data = (const unsigned char *)git_odb_object_data(obj);
otype = git_odb_object_type(obj);
// We provide methods to convert from the object type which is an enum, to a string
// representation of that value (and vice-versa).
str_type = git_object_type2string(otype);
printf("object length and type: %d, %s\n",
(int)git_odb_object_size(obj),
str_type);
// For proper memory management, close the object when you are done with it or it will leak
// memory.
git_odb_object_free(obj);
// #### Raw Object Writing
printf("\n*Raw Object Write*\n");
// You can also write raw object data to Git. This is pretty cool because it gives you
// direct access to the key/value properties of Git. Here we'll write a new blob object
// that just contains a simple string. Notice that we have to specify the object type as
// the `git_otype` enum.
git_odb_write(&oid, odb, "test data", sizeof("test data") - 1, GIT_OBJ_BLOB);
// Now that we've written the object, we can check out what SHA1 was generated when the
// object was written to our database.
git_oid_fmt(out, &oid);
printf("Written Object: %s\n", out);
// ### Object Parsing
// libgit2 has methods to parse every object type in Git so you don't have to work directly
// with the raw data. This is much faster and simpler than trying to deal with the raw data
// yourself.
// #### Commit Parsing
// [Parsing commit objects][pco] is simple and gives you access to all the data in the commit
// - the // author (name, email, datetime), committer (same), tree, message, encoding and parent(s).
// [pco]: http://libgit2.github.com/libgit2/#HEAD/group/commit
printf("\n*Commit Parsing*\n");
git_commit *commit;
git_oid_fromstr(&oid, "f0877d0b841d75172ec404fc9370173dfffc20d1");
error = git_commit_lookup(&commit, repo, &oid);
const git_signature *author, *cmtter;
const char *message;
time_t ctime;
unsigned int parents, p;
// Each of the properties of the commit object are accessible via methods, including commonly
// needed variations, such as `git_commit_time` which returns the author time and `_message`
// which gives you the commit message.
message = git_commit_message(commit);
author = git_commit_author(commit);
cmtter = git_commit_committer(commit);
ctime = git_commit_time(commit);
// The author and committer methods return [git_signature] structures, which give you name, email
// and `when`, which is a `git_time` structure, giving you a timestamp and timezone offset.
printf("Author: %s (%s)\n", author->name, author->email);
// Commits can have zero or more parents. The first (root) commit will have no parents, most commits
// will have one, which is the commit it was based on, and merge commits will have two or more.
// Commits can technically have any number, though it's pretty rare to have more than two.
parents = git_commit_parentcount(commit);
for (p = 0;p < parents;p++) {
git_commit *parent;
git_commit_parent(&parent, commit, p);
git_oid_fmt(out, git_commit_id(parent));
printf("Parent: %s\n", out);
git_commit_free(parent);
}
// Don't forget to close the object to prevent memory leaks. You will have to do this for
// all the objects you open and parse.
git_commit_free(commit);
// #### Writing Commits
//
// libgit2 provides a couple of methods to create commit objects easily as well. There are four
// different create signatures, we'll just show one of them here. You can read about the other
// ones in the [commit API docs][cd].
// [cd]: http://libgit2.github.com/libgit2/#HEAD/group/commit
printf("\n*Commit Writing*\n");
git_oid tree_id, parent_id, commit_id;
git_tree *tree;
git_commit *parent;
// Creating signatures for an authoring identity and time is pretty simple - you will need to have
// this to create a commit in order to specify who created it and when. Default values for the name
// and email should be found in the `user.name` and `user.email` configuration options. See the `config`
// section of this example file to see how to access config values.
git_signature_new((git_signature **)&author, "Scott Chacon", "*****@*****.**",
123456789, 60);
git_signature_new((git_signature **)&cmtter, "Scott A Chacon", "*****@*****.**",
987654321, 90);
// Commit objects need a tree to point to and optionally one or more parents. Here we're creating oid
// objects to create the commit with, but you can also use
git_oid_fromstr(&tree_id, "28873d96b4e8f4e33ea30f4c682fd325f7ba56ac");
git_tree_lookup(&tree, repo, &tree_id);
git_oid_fromstr(&parent_id, "f0877d0b841d75172ec404fc9370173dfffc20d1");
git_commit_lookup(&parent, repo, &parent_id);
// Here we actually create the commit object with a single call with all the values we need to create
// the commit. The SHA key is written to the `commit_id` variable here.
git_commit_create_v(
&commit_id, /* out id */
repo,
NULL, /* do not update the HEAD */
author,
cmtter,
NULL, /* use default message encoding */
"example commit",
tree,
1, parent);
// Now we can take a look at the commit SHA we've generated.
git_oid_fmt(out, &commit_id);
printf("New Commit: %s\n", out);
// #### Tag Parsing
// You can parse and create tags with the [tag management API][tm], which functions very similarly
// to the commit lookup, parsing and creation methods, since the objects themselves are very similar.
// [tm]: http://libgit2.github.com/libgit2/#HEAD/group/tag
printf("\n*Tag Parsing*\n");
git_tag *tag;
const char *tmessage, *tname;
git_otype ttype;
// We create an oid for the tag object if we know the SHA and look it up in the repository the same
// way that we would a commit (or any other) object.
git_oid_fromstr(&oid, "bc422d45275aca289c51d79830b45cecebff7c3a");
error = git_tag_lookup(&tag, repo, &oid);
// Now that we have the tag object, we can extract the information it generally contains: the target
// (usually a commit object), the type of the target object (usually 'commit'), the name ('v1.0'),
// the tagger (a git_signature - name, email, timestamp), and the tag message.
git_tag_target((git_object **)&commit, tag);
tname = git_tag_name(tag); // "test"
ttype = git_tag_type(tag); // GIT_OBJ_COMMIT (otype enum)
tmessage = git_tag_message(tag); // "tag message\n"
printf("Tag Message: %s\n", tmessage);
git_commit_free(commit);
// #### Tree Parsing
// [Tree parsing][tp] is a bit different than the other objects, in that we have a subtype which is the
// tree entry. This is not an actual object type in Git, but a useful structure for parsing and
// traversing tree entries.
//
// [tp]: http://libgit2.github.com/libgit2/#HEAD/group/tree
printf("\n*Tree Parsing*\n");
const git_tree_entry *entry;
git_object *objt;
// Create the oid and lookup the tree object just like the other objects.
git_oid_fromstr(&oid, "2a741c18ac5ff082a7caaec6e74db3075a1906b5");
git_tree_lookup(&tree, repo, &oid);
// Getting the count of entries in the tree so you can iterate over them if you want to.
int cnt = git_tree_entrycount(tree); // 3
printf("tree entries: %d\n", cnt);
entry = git_tree_entry_byindex(tree, 0);
printf("Entry name: %s\n", git_tree_entry_name(entry)); // "hello.c"
// You can also access tree entries by name if you know the name of the entry you're looking for.
entry = git_tree_entry_byname(tree, "hello.c");
git_tree_entry_name(entry); // "hello.c"
// Once you have the entry object, you can access the content or subtree (or commit, in the case
// of submodules) that it points to. You can also get the mode if you want.
git_tree_entry_to_object(&objt, repo, entry); // blob
// Remember to close the looked-up object once you are done using it
git_object_free(objt);
// #### Blob Parsing
//
// The last object type is the simplest and requires the least parsing help. Blobs are just file
// contents and can contain anything, there is no structure to it. The main advantage to using the
// [simple blob api][ba] is that when you're creating blobs you don't have to calculate the size
// of the content. There is also a helper for reading a file from disk and writing it to the db and
// getting the oid back so you don't have to do all those steps yourself.
//
// [ba]: http://libgit2.github.com/libgit2/#HEAD/group/blob
printf("\n*Blob Parsing*\n");
git_blob *blob;
git_oid_fromstr(&oid, "af7574ea73f7b166f869ef1a39be126d9a186ae0");
git_blob_lookup(&blob, repo, &oid);
// You can access a buffer with the raw contents of the blob directly.
// Note that this buffer may not be contain ASCII data for certain blobs (e.g. binary files):
// do not consider the buffer a NULL-terminated string, and use the `git_blob_rawsize` attribute to
// find out its exact size in bytes
printf("Blob Size: %ld\n", git_blob_rawsize(blob)); // 8
git_blob_rawcontent(blob); // "content"
// ### Revwalking
//
// The libgit2 [revision walking api][rw] provides methods to traverse the directed graph created
// by the parent pointers of the commit objects. Since all commits point back to the commit that
// came directly before them, you can walk this parentage as a graph and find all the commits that
// were ancestors of (reachable from) a given starting point. This can allow you to create `git log`
// type functionality.
//
// [rw]: http://libgit2.github.com/libgit2/#HEAD/group/revwalk
printf("\n*Revwalking*\n");
git_revwalk *walk;
git_commit *wcommit;
git_oid_fromstr(&oid, "f0877d0b841d75172ec404fc9370173dfffc20d1");
// To use the revwalker, create a new walker, tell it how you want to sort the output and then push
// one or more starting points onto the walker. If you want to emulate the output of `git log` you
// would push the SHA of the commit that HEAD points to into the walker and then start traversing them.
// You can also 'hide' commits that you want to stop at or not see any of their ancestors. So if you
// want to emulate `git log branch1..branch2`, you would push the oid of `branch2` and hide the oid
// of `branch1`.
git_revwalk_new(&walk, repo);
git_revwalk_sorting(walk, GIT_SORT_TOPOLOGICAL | GIT_SORT_REVERSE);
git_revwalk_push(walk, &oid);
const git_signature *cauth;
const char *cmsg;
// Now that we have the starting point pushed onto the walker, we can start asking for ancestors. It
// will return them in the sorting order we asked for as commit oids.
// We can then lookup and parse the commited pointed at by the returned OID;
// note that this operation is specially fast since the raw contents of the commit object will
// be cached in memory
while ((git_revwalk_next(&oid, walk)) == 0) {
error = git_commit_lookup(&wcommit, repo, &oid);
cmsg = git_commit_message(wcommit);
cauth = git_commit_author(wcommit);
printf("%s (%s)\n", cmsg, cauth->email);
git_commit_free(wcommit);
}
// Like the other objects, be sure to free the revwalker when you're done to prevent memory leaks.
// Also, make sure that the repository being walked it not deallocated while the walk is in
// progress, or it will result in undefined behavior
git_revwalk_free(walk);
// ### Index File Manipulation
//
// The [index file API][gi] allows you to read, traverse, update and write the Git index file
// (sometimes thought of as the staging area).
//
// [gi]: http://libgit2.github.com/libgit2/#HEAD/group/index
printf("\n*Index Walking*\n");
git_index *index;
unsigned int i, ecount;
// You can either open the index from the standard location in an open repository, as we're doing
// here, or you can open and manipulate any index file with `git_index_open_bare()`. The index
// for the repository will be located and loaded from disk.
git_repository_index(&index, repo);
// For each entry in the index, you can get a bunch of information including the SHA (oid), path
// and mode which map to the tree objects that are written out. It also has filesystem properties
// to help determine what to inspect for changes (ctime, mtime, dev, ino, uid, gid, file_size and flags)
// All these properties are exported publicly in the `git_index_entry` struct
ecount = git_index_entrycount(index);
for (i = 0; i < ecount; ++i) {
git_index_entry *e = git_index_get(index, i);
printf("path: %s\n", e->path);
printf("mtime: %d\n", (int)e->mtime.seconds);
printf("fs: %d\n", (int)e->file_size);
}
git_index_free(index);
// ### References
//
// The [reference API][ref] allows you to list, resolve, create and update references such as
// branches, tags and remote references (everything in the .git/refs directory).
//
// [ref]: http://libgit2.github.com/libgit2/#HEAD/group/reference
printf("\n*Reference Listing*\n");
// Here we will implement something like `git for-each-ref` simply listing out all available
// references and the object SHA they resolve to.
git_strarray ref_list;
git_reference_list(&ref_list, repo, GIT_REF_LISTALL);
const char *refname;
git_reference *ref;
// Now that we have the list of reference names, we can lookup each ref one at a time and
// resolve them to the SHA, then print both values out.
for (i = 0; i < ref_list.count; ++i) {
refname = ref_list.strings[i];
git_reference_lookup(&ref, repo, refname);
switch (git_reference_type(ref)) {
case GIT_REF_OID:
git_oid_fmt(out, git_reference_oid(ref));
printf("%s [%s]\n", refname, out);
break;
case GIT_REF_SYMBOLIC:
printf("%s => %s\n", refname, git_reference_target(ref));
break;
default:
fprintf(stderr, "Unexpected reference type\n");
exit(1);
}
}
git_strarray_free(&ref_list);
// ### Config Files
//
// The [config API][config] allows you to list and updatee config values in
// any of the accessible config file locations (system, global, local).
//
// [config]: http://libgit2.github.com/libgit2/#HEAD/group/config
printf("\n*Config Listing*\n");
const char *email;
int32_t j;
git_config *cfg;
// Open a config object so we can read global values from it.
git_config_open_ondisk(&cfg, "~/.gitconfig");
git_config_get_int32(cfg, "help.autocorrect", &j);
printf("Autocorrect: %d\n", j);
git_config_get_string(cfg, "user.email", &email);
printf("Email: %s\n", email);
// Finally, when you're done with the repository, you can free it as well.
git_repository_free(repo);
return 0;
}
/* The wiki handler */
static int wiki_handler(request_rec *r)
{
wiki_conf *conf;
git_repository *repo;
const git_oid *tree_oid;
char *path;
const git_oid *oid;
char hash[41];
hash[40] = '\0';
int ret;
int type;
MMIOT *doc;
if (strcmp(r->handler, "wiki")) {
return DECLINED;
}
if (r->header_only) {
return OK;
}
conf =
(wiki_conf *) ap_get_module_config(r->per_dir_config,
&wiki_module);
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "filename=%s",
r->filename);
if (conf->basepath) {
path = ltrim(conf->basepath, r->parsed_uri.path);
} else {
path = r->parsed_uri.path + 1;
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "path=%s", path);
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"r->content_type=%s", r->content_type);
if (conf->repo == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"WikiRepository is not set.");
return HTTP_INTERNAL_SERVER_ERROR;
}
ret = git_repository_open(&repo, conf->repo);
if (ret) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"Cannot open git repository.(%s)", conf->repo);
return HTTP_INTERNAL_SERVER_ERROR;
}
tree_oid = lookup_master_tree(repo);
if (tree_oid == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"Not found master tree.");
git_repository_free(repo);
}
type = lookup_object_oid(r, repo, tree_oid, path, &oid);
if (type == WIKI_NOTFOUND) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"Object is not found.");
git_repository_free(repo);
return HTTP_NOT_FOUND;
} else if(type == WIKI_DIR) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Directory listing is not implement yet.");
git_repository_free(repo);
return HTTP_FORBIDDEN;
} else if(type == WIKI_ERROR) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Error at lookup.");
git_repository_free(repo);
return HTTP_NOT_FOUND;
}
git_oid_fmt(hash, oid);
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "object hash=%s", hash);
const char *data;
size_t size;
git_odb *odb;
ret = git_repository_odb(&odb, repo);
git_odb_object *odb_object;
ret = git_odb_read(&odb_object, odb, oid);
data = git_odb_object_data(odb_object);
size = git_odb_object_size(odb_object);
git_odb_object_free(odb_object); // is this safe?
if (type == WIKI_FOUND) {
ap_rwrite(data, size, r);
} else if(type == WIKI_MARKDOWN) {
r->content_type = "text/html";
doc = mkd_string(data, size, 0);
if (doc == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"mkd_string() returned NULL\n");
git_repository_free(repo);
return HTTP_INTERNAL_SERVER_ERROR;
}
wiki_output(doc, r);
mkd_cleanup(doc);
} else {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Unknown Error.\n");
git_repository_free(repo);
return HTTP_INTERNAL_SERVER_ERROR;
}
git_repository_free(repo);
return OK;
}
int git_object_lookup_prefix(
git_object **object_out,
git_repository *repo,
const git_oid *id,
size_t len,
git_otype type)
{
git_object *object = NULL;
git_odb *odb = NULL;
git_odb_object *odb_obj = NULL;
int error = 0;
assert(repo && object_out && id);
if (len < GIT_OID_MINPREFIXLEN) {
giterr_set(GITERR_OBJECT, "Ambiguous lookup - OID prefix is too short");
return GIT_EAMBIGUOUS;
}
error = git_repository_odb__weakptr(&odb, repo);
if (error < 0)
return error;
if (len > GIT_OID_HEXSZ)
len = GIT_OID_HEXSZ;
if (len == GIT_OID_HEXSZ) {
git_cached_obj *cached = NULL;
/* We want to match the full id : we can first look up in the cache,
* since there is no need to check for non ambiguousity
*/
cached = git_cache_get_any(&repo->objects, id);
if (cached != NULL) {
if (cached->flags == GIT_CACHE_STORE_PARSED) {
object = (git_object *)cached;
if (type != GIT_OBJ_ANY && type != object->cached.type) {
git_object_free(object);
giterr_set(GITERR_INVALID,
"The requested type does not match the type in ODB");
return GIT_ENOTFOUND;
}
*object_out = object;
return 0;
} else if (cached->flags == GIT_CACHE_STORE_RAW) {
odb_obj = (git_odb_object *)cached;
} else {
assert(!"Wrong caching type in the global object cache");
}
} else {
/* Object was not found in the cache, let's explore the backends.
* We could just use git_odb_read_unique_short_oid,
* it is the same cost for packed and loose object backends,
* but it may be much more costly for sqlite and hiredis.
*/
error = git_odb_read(&odb_obj, odb, id);
}
} else {
git_oid short_oid;
/* We copy the first len*4 bits from id and fill the remaining with 0s */
memcpy(short_oid.id, id->id, (len + 1) / 2);
if (len % 2)
short_oid.id[len / 2] &= 0xF0;
memset(short_oid.id + (len + 1) / 2, 0, (GIT_OID_HEXSZ - len) / 2);
/* If len < GIT_OID_HEXSZ (a strict short oid was given), we have
* 2 options :
* - We always search in the cache first. If we find that short oid is
* ambiguous, we can stop. But in all the other cases, we must then
* explore all the backends (to find an object if there was match,
* or to check that oid is not ambiguous if we have found 1 match in
* the cache)
* - We never explore the cache, go right to exploring the backends
* We chose the latter : we explore directly the backends.
*/
error = git_odb_read_prefix(&odb_obj, odb, &short_oid, len);
}
if (error < 0)
return error;
error = git_object__from_odb_object(object_out, repo, odb_obj, type);
git_odb_object_free(odb_obj);
return error;
}
void git_blob__free(void *blob)
{
git_odb_object_free(((git_blob *)blob)->odb_object);
git__free(blob);
}
/** Entry point for this command */
int main(int argc, char *argv[])
{
git_repository *repo;
struct opts o = { ".", NULL, 0, 0 };
git_object *obj = NULL;
char oidstr[GIT_OID_HEXSZ + 1];
git_libgit2_init();
parse_opts(&o, argc, argv);
check_lg2(git_repository_open_ext(&repo, o.dir, 0, NULL),
"Could not open repository", NULL);
check_lg2(git_revparse_single(&obj, repo, o.rev),
"Could not resolve", o.rev);
if (o.verbose) {
char oidstr[GIT_OID_HEXSZ + 1];
git_oid_tostr(oidstr, sizeof(oidstr), git_object_id(obj));
printf("%s %s\n--\n",
git_object_type2string(git_object_type(obj)), oidstr);
}
switch (o.action) {
case SHOW_TYPE:
printf("%s\n", git_object_type2string(git_object_type(obj)));
break;
case SHOW_SIZE: {
git_odb *odb;
git_odb_object *odbobj;
check_lg2(git_repository_odb(&odb, repo), "Could not open ODB", NULL);
check_lg2(git_odb_read(&odbobj, odb, git_object_id(obj)),
"Could not find obj", NULL);
printf("%ld\n", (long)git_odb_object_size(odbobj));
git_odb_object_free(odbobj);
git_odb_free(odb);
}
break;
case SHOW_NONE:
/* just want return result */
break;
case SHOW_PRETTY:
switch (git_object_type(obj)) {
case GIT_OBJ_BLOB:
show_blob((const git_blob *)obj);
break;
case GIT_OBJ_COMMIT:
show_commit((const git_commit *)obj);
break;
case GIT_OBJ_TREE:
show_tree((const git_tree *)obj);
break;
case GIT_OBJ_TAG:
show_tag((const git_tag *)obj);
break;
default:
printf("unknown %s\n", oidstr);
break;
}
break;
}
git_object_free(obj);
git_repository_free(repo);
git_libgit2_shutdown();
return 0;
}
