static int revwalk_parseopts(git_repository *repo, git_revwalk *walk, int nopts, char **opts)
{
int hide, i, error;
unsigned int sorting = GIT_SORT_NONE;
hide = 0;
for (i = 0; i < nopts; i++) {
if (!strcmp(opts[i], "--topo-order")) {
sorting = GIT_SORT_TOPOLOGICAL | (sorting & GIT_SORT_REVERSE);
git_revwalk_sorting(walk, sorting);
} else if (!strcmp(opts[i], "--date-order")) {
sorting = GIT_SORT_TIME | (sorting & GIT_SORT_REVERSE);
git_revwalk_sorting(walk, sorting);
} else if (!strcmp(opts[i], "--reverse")) {
sorting = (sorting & ~GIT_SORT_REVERSE)
| ((sorting & GIT_SORT_REVERSE) ? 0 : GIT_SORT_REVERSE);
git_revwalk_sorting(walk, sorting);
} else if (!strcmp(opts[i], "--not")) {
hide = !hide;
} else if (opts[i][0] == '^') {
if ((error = push_spec(repo, walk, opts[i] + 1, !hide)))
return error;
} else if (strstr(opts[i], "..")) {
if ((error = push_range(repo, walk, opts[i], hide)))
return error;
} else {
if ((error = push_spec(repo, walk, opts[i], hide)))
return error;
}
}
return 0;
}
static int test_walk(git_revwalk *walk, const git_oid *root,
int flags, const int possible_results[][6], int results_count)
{
git_oid oid;
int i;
int result_array[commit_count];
git_revwalk_sorting(walk, flags);
git_revwalk_push(walk, root);
for (i = 0; i < commit_count; ++i)
result_array[i] = -1;
i = 0;
while (git_revwalk_next(&oid, walk) == GIT_SUCCESS) {
result_array[i++] = get_commit_index(&oid);
/*{
char str[41];
git_oid_fmt(str, &oid);
str[40] = 0;
printf(" %d) %s\n", i, str);
}*/
}
for (i = 0; i < results_count; ++i)
if (memcmp(possible_results[i],
result_array, result_bytes) == 0)
return GIT_SUCCESS;
return GIT_ERROR;
}
static int handle_grep_syntax(git_object **out, git_repository *repo, const git_oid *spec_oid, const char *pattern)
{
regex_t preg;
git_revwalk *walk = NULL;
int error;
if ((error = build_regex(&preg, pattern)) < 0)
return error;
if ((error = git_revwalk_new(&walk, repo)) < 0)
goto cleanup;
git_revwalk_sorting(walk, GIT_SORT_TIME);
if (spec_oid == NULL) {
if ((error = git_revwalk_push_glob(walk, "refs/*")) < 0)
goto cleanup;
} else if ((error = git_revwalk_push(walk, spec_oid)) < 0)
goto cleanup;
error = walk_and_search(out, walk, &preg);
cleanup:
regfree(&preg);
git_revwalk_free(walk);
return error;
}
static int handle_grep_syntax(git_object **out, git_repository *repo, const git_oid *spec_oid, const char *pattern)
{
regex_t preg;
git_revwalk *walk = NULL;
int error = -1;
if (build_regex(&preg, pattern) < 0)
return -1;
if (git_revwalk_new(&walk, repo) < 0)
goto cleanup;
git_revwalk_sorting(walk, GIT_SORT_TIME);
if (spec_oid == NULL) {
// TODO: @carlosmn: The glob should be refs/* but this makes git_revwalk_next() fails
if (git_revwalk_push_glob(walk, "refs/heads/*") < 0)
goto cleanup;
} else if (git_revwalk_push(walk, spec_oid) < 0)
goto cleanup;
error = walk_and_search(out, walk, &preg);
cleanup:
regfree(&preg);
git_revwalk_free(walk);
return error;
}
void test_revwalk_basic__push_range(void)
{
git_revwalk_reset(_walk);
git_revwalk_sorting(_walk, 0);
cl_git_pass(git_revwalk_push_range(_walk, "9fd738e~2..9fd738e"));
cl_git_pass(test_walk_only(_walk, commit_sorting_segment, 1));
}
/*
* call-seq:
* walker.sorting = sort_mode
*
* Change the sorting mode for the revision walk.
*
* This will cause +walker+ to be reset.
*/
static VALUE rb_git_walker_sorting(VALUE self, VALUE ruby_sort_mode)
{
git_revwalk *walk;
Data_Get_Struct(self, git_revwalk, walk);
git_revwalk_sorting(walk, FIX2INT(ruby_sort_mode));
return Qnil;
}
//go through history using the revwalker object
bool MainWindow::walkHistory(git_commit* commit)
{
git_commit* wcommit;
const char* cmsg;
const git_oid* oid = git_commit_id(commit);
git_oid commit_oid;
git_oid_cpy(&commit_oid, oid);
git_revwalk* walker;
git_revwalk_new(&walker, repo);
git_revwalk_sorting(walker, GIT_SORT_TOPOLOGICAL | GIT_SORT_TIME);
git_revwalk_push(walker, &commit_oid);
while (git_revwalk_next(&commit_oid, walker) == 0)
{
int error = git_commit_lookup(&wcommit, repo, &commit_oid);
cmsg = git_commit_message(wcommit);
qDebug() << "Commit msg = " << cmsg;
git_commit_free(wcommit);
}
git_revwalk_free(walker);
}
static int test_walk(git_revwalk *walk, const git_oid *root,
int flags, const int possible_results[][6], int results_count)
{
git_revwalk_sorting(walk, flags);
git_revwalk_push(walk, root);
return test_walk_only(walk, possible_results, results_count);
}
int main(int argc, char **argv)
{
struct stat st;
struct timeval start, end;
char filepath[1024], repodir[64];
char *dirpath, *filename, *ref = NULL;
if (argc != 3) {
fprintf(stderr, "Usage: ./log dirpath filename\n");
exit(-1);
}
dirpath = argv[1];
filename = argv[2];
strcpy(repodir, dirpath);
strcat(repodir, "/.git");
strcpy(filepath, dirpath);
strcat(filepath, "/");
strcat(filepath, filename);
if (stat(filepath, &st) < 0) {
fprintf(stderr, "Not valid file path: \"%s\"!\n", filepath);
exit(-2);
}
memset(&s, 0, sizeof(s));
s.sorting = GIT_SORT_TIME;
s.hide = 0;
s.repodir = strlen(repodir) > 0 ? repodir : "/tmp/git/.git";
s.ref = ref ? ref : "refs/heads/master";
/* Init libgit2 library */
git_libgit2_init();
/* Open repo. */
check_lg2(git_repository_open_ext(&s.repo, s.repodir, 0, NULL),
"Could not open repository", s.repodir);
/* Create revwalker. */
check_lg2(git_revwalk_new(&s.walker, s.repo),
"Could not create revision walker", NULL);
git_revwalk_sorting(s.walker, s.sorting);
/* Show file's latest commit. */
printf("filename: %s\n", filename);
gettimeofday(&start, NULL);
git_show_last_commit(filename);
gettimeofday(&end, NULL);
printf("time span: %ld(ms)\n", (end.tv_sec - start.tv_sec) * 1000 + \
(end.tv_usec - start.tv_usec) / 1000);
git_revwalk_free(s.walker);
git_repository_free(s.repo);
git_libgit2_shutdown();
return 0;
}
void QGitRevWalk::setSorting(SortModes sortMode)
{
// wrap c defines
unsigned int sort = GIT_SORT_NONE;
if ( sortMode.testFlag(Time) )
sort |= GIT_SORT_TIME;
if ( sortMode.testFlag(Topological) )
sort |= GIT_SORT_TOPOLOGICAL;
if ( sortMode.testFlag(Reverse) )
sort |= GIT_SORT_REVERSE;
git_revwalk_sorting(m_revWalk, sort);
}
PyObject *
Walker_sort(Walker *self, PyObject *py_sort_mode)
{
int sort_mode;
sort_mode = (int)PyInt_AsLong(py_sort_mode);
if (sort_mode == -1 && PyErr_Occurred())
return NULL;
git_revwalk_sorting(self->walk, sort_mode);
Py_RETURN_NONE;
}
static git_revwalk *gbr_revwalk_setup_fromto(git_repository *repo, git_oid *base, const git_oid *head)
{
git_revwalk *walker;
if (git_revwalk_new(&walker, repo) != 0) {
gbr_perror("gbr_revwalk_setup_fromto()");
return NULL;
}
git_revwalk_sorting(walker, GIT_SORT_REVERSE);
git_revwalk_push(walker, head);
git_revwalk_hide(walker, base);
return walker;
}
PyObject *
Repository_walk(Repository *self, PyObject *args)
{
PyObject *value;
unsigned int sort = GIT_SORT_NONE;
int err;
git_oid oid;
git_revwalk *walk;
Walker *py_walker;
if (!PyArg_ParseTuple(args, "O|I", &value, &sort))
return NULL;
err = git_revwalk_new(&walk, self->repo);
if (err < 0)
return Error_set(err);
/* Sort */
git_revwalk_sorting(walk, sort);
/* Push */
if (value != Py_None) {
err = py_oid_to_git_oid_expand(self->repo, value, &oid);
if (err < 0) {
git_revwalk_free(walk);
return NULL;
}
err = git_revwalk_push(walk, &oid);
if (err < 0) {
git_revwalk_free(walk);
return Error_set(err);
}
}
py_walker = PyObject_New(Walker, &WalkerType);
if (!py_walker) {
git_revwalk_free(walk);
return NULL;
}
Py_INCREF(self);
py_walker->repo = self;
py_walker->walk = walk;
return (PyObject*)py_walker;
}
static int rebase_init_operations(
git_rebase *rebase,
git_repository *repo,
const git_annotated_commit *branch,
const git_annotated_commit *upstream,
const git_annotated_commit *onto)
{
git_revwalk *revwalk = NULL;
git_commit *commit;
git_oid id;
bool merge;
git_rebase_operation *operation;
int error;
if (!upstream)
upstream = onto;
if ((error = git_revwalk_new(&revwalk, rebase->repo)) < 0 ||
(error = git_revwalk_push(revwalk, git_annotated_commit_id(branch))) < 0 ||
(error = git_revwalk_hide(revwalk, git_annotated_commit_id(upstream))) < 0)
goto done;
git_revwalk_sorting(revwalk, GIT_SORT_REVERSE | GIT_SORT_TIME);
while ((error = git_revwalk_next(&id, revwalk)) == 0) {
if ((error = git_commit_lookup(&commit, repo, &id)) < 0)
goto done;
merge = (git_commit_parentcount(commit) > 1);
git_commit_free(commit);
if (merge)
continue;
operation = git_array_alloc(rebase->operations);
operation->type = GIT_REBASE_OPERATION_PICK;
git_oid_cpy((git_oid *)&operation->id, &id);
}
error = 0;
done:
git_revwalk_free(revwalk);
return error;
}
void test_revwalk_basic__push_all(void)
{
git_oid oid;
int i = 0;
revwalk_basic_setup_walk(NULL);
git_revwalk_reset(_walk);
git_revwalk_sorting(_walk, 0);
cl_git_pass(git_revwalk_push_glob(_walk, "*"));
while (git_revwalk_next(&oid, _walk) == 0) {
i++;
}
/* git rev-list --count --all #=> 15 */
cl_assert_equal_i(15, i);
}
void test_revwalk_basic__push_mixed(void)
{
git_oid oid;
int i = 0;
revwalk_basic_setup_walk(NULL);
git_revwalk_reset(_walk);
git_revwalk_sorting(_walk, 0);
cl_git_pass(git_revwalk_push_glob(_walk, "tags"));
while (git_revwalk_next(&oid, _walk) == 0) {
i++;
}
/* git rev-list --count --glob=tags #=> 9 */
cl_assert_equal_i(9, i);
}
void test_revwalk_basic__mimic_git_rev_list(void)
{
git_oid oid;
revwalk_basic_setup_walk(NULL);
git_revwalk_sorting(_walk, GIT_SORT_TIME);
cl_git_pass(git_revwalk_push_ref(_walk, "refs/heads/br2"));
cl_git_pass(git_revwalk_push_ref(_walk, "refs/heads/master"));
cl_git_pass(git_oid_fromstr(&oid, "e90810b8df3e80c413d903f631643c716887138d"));
cl_git_pass(git_revwalk_push(_walk, &oid));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "a65fedf39aefe402d3bb6e24df4d4f5fe4547750"));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "e90810b8df3e80c413d903f631643c716887138d"));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "6dcf9bf7541ee10456529833502442f385010c3d"));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "a4a7dce85cf63874e984719f4fdd239f5145052f"));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "be3563ae3f795b2b4353bcce3a527ad0a4f7f644"));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "c47800c7266a2be04c571c04d5a6614691ea99bd"));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "9fd738e8f7967c078dceed8190330fc8648ee56a"));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "4a202b346bb0fb0db7eff3cffeb3c70babbd2045"));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "5b5b025afb0b4c913b4c338a42934a3863bf3644"));
cl_git_pass(git_revwalk_next(&oid, _walk));
cl_assert(!git_oid_streq(&oid, "8496071c1b46c854b31185ea97743be6a8774479"));
cl_git_fail_with(git_revwalk_next(&oid, _walk), GIT_ITEROVER);
}
int cmd_revwalk(git_repository *repo, int argc, const char **argv)
{
git_revwalk *walker;
git_oid oid;
int error;
if (git_revwalk_new(&walker, repo) < 0)
return -1;
git_revwalk_sorting(walker, GIT_SORT_TIME);
if (git_revwalk_push_head(walker) < 0)
return -1;
while ((error = git_revwalk_next(&oid, walker)) == 0) {
char hex[41];
hex[40] = '\0';
git_oid_fmt(hex, &oid);
printf("%s\n", hex);
}
return error == GIT_ITEROVER ? 0 : error;
}
int cmd_rev_list(git_repository *repo, int argc, char **argv)
{
const char *commit_string = NULL;
const char *format = NULL;
int i = 0;
git_oid commit_oid;
git_oid current_oid;
char current_oid_str[GIT_OID_HEXSZ+1];
int err = 0;
int rc = EXIT_FAILURE;
git_commit *commit;
git_revwalk *walk;
for (i = 1; i < argc; i++)
{
if (*argv[i] == '-')
{
if (!prefixcmp(argv[i], "--pretty="))
{
format = argv[i] + strlen("--pretty=");
} else
{
fprintf(stderr,"Unknown option \"%s\"\n",argv[i]);
goto out;
}
} else
{
commit_string = argv[i];
}
}
if (!commit_string)
{
fprintf(stderr,"No commit id given!\n");
goto out;
}
if (format)
{
fprintf(stderr,"Format \"%s\" not supported!\n",format);
goto out;
}
if ((err = git_oid_fromstrn(&commit_oid,commit_string,strlen(commit_string))) != GIT_OK)
goto out;
if ((err = git_commit_lookup_prefix(&commit,repo,&commit_oid,strlen(commit_string))) != GIT_OK)
goto out;
if ((err = git_revwalk_new(&walk, repo)) != GIT_OK)
goto out;
git_revwalk_sorting(walk, GIT_SORT_TIME);
if ((err = git_revwalk_push(walk, &commit_oid)) != GIT_OK)
goto out;
while ((git_revwalk_next(¤t_oid, walk)) == GIT_OK)
{
struct git_commit *wcommit;
if (git_commit_lookup(&wcommit, repo, ¤t_oid) != 0)
continue;
git_oid_tostr(current_oid_str,sizeof(current_oid_str),¤t_oid);
printf("%s\n",current_oid_str);
git_commit_free(wcommit);
}
git_revwalk_free(walk);
out:
if (err) libgit_error();
if (commit) git_commit_free(commit);
return rc;
}
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;
}
int cmd_rev_list(int argc, const char **argv)
{
/* Doesn't pass the tests due to bug in libgit2 apparently */
please_git_do_it_for_me();
const char *commit_string = NULL;
const char *format = NULL;
int i = 0;
git_repository *repository=NULL;
git_oid commit_oid;
git_oid current_oid;
char commit_oid_string[GIT_OID_HEXSZ+1];
size_t len;
int e;
/* For now, we only implement --format=oneline */
if (argc != 3) {
please_git_do_it_for_me();
}
for (i = 1; i < 3; ++i) {
if (*argv[i] == '-') {
if (!prefixcmp(argv[i], "--pretty=")) {
format = argv[i] + strlen("--pretty=");
}
} else {
commit_string = argv[i];
}
}
if (!commit_string) {
/* Show usage : ask git for now */
please_git_do_it_for_me();
}
if (!format) {
/* No option or not handled option */
please_git_do_it_for_me();
}
if (strcmp(format, "oneline")) {
/* Format not supported for now */
please_git_do_it_for_me();
}
/* Supported object specifications are full or short oid */
/* Create the partial oid (filled with '0's) from the given argument */
len = strlen(commit_string);
if (len > GIT_OID_HEXSZ) {
/* It's not a sha1 */
please_git_do_it_for_me();
}
memcpy(commit_oid_string, commit_string, len * sizeof(char));
memset(commit_oid_string + len, '0', (GIT_OID_HEXSZ - len) * sizeof(char));
commit_oid_string[GIT_OID_HEXSZ] = '\0';
e = git_oid_fromstr(&commit_oid, commit_oid_string);
if (e) {
/* Not an OID. The object can be specified in a lot
* of different ways (not supported by libgit2 yet).
* Fall back to git.
*/
please_git_do_it_for_me();
}
repository = get_git_repository();
/* Lookup the commit object */
e = git_object_lookup_prefix((git_object **)&commit, repository, &commit_oid, len, GIT_OBJ_ANY);
if (e != GIT_OK) {
if (e == GIT_ENOTFOUND) {
/* Maybe the given argument is not a sha1
* but a tag name (which looks like a sha1)
* Fall back to git.
*/
please_git_do_it_for_me();
} else if (e == GIT_EAMBIGUOUS) {
error("%s is an ambiguous prefix", commit_string);
} else {
libgit_error();
}
}
if (git_object_type((git_object *)commit) != GIT_OBJ_COMMIT) {
/* Not a commit : nothing to do */
cleanup();
return EXIT_SUCCESS;
}
if (git_revwalk_new(&walk, repository)) {
cleanup();
libgit_error();
}
git_revwalk_sorting(walk, GIT_SORT_TIME);
if (git_revwalk_push(walk, &commit_oid)) {
cleanup();
libgit_error();
}
git_commit_close(commit);
if ((git_revwalk_next(¤t_oid, walk)) == GIT_OK) {
char oid_string[GIT_OID_HEXSZ+1];
oid_string[GIT_OID_HEXSZ] = '\0';
const char *cmsg;
while (1) {
git_oid_fmt(oid_string, ¤t_oid);
if (git_commit_lookup(&commit, repository, ¤t_oid)) {
libgit_error();
}
cmsg = git_commit_message(commit);
git_oid_fmt(oid_string, git_commit_id(commit));
printf("%s %s\n", oid_string, cmsg);
if ((git_revwalk_next(¤t_oid, walk)) != GIT_OK)
break;
git_commit_close(commit);
}
}
cleanup();
return EXIT_SUCCESS;
}
