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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "git2/common.h"
#include "git2/object.h"
#include "git2/repository.h"
#include "git2/signature.h"
#include "git2/sys/commit.h"
#include "common.h"
#include "odb.h"
#include "commit.h"
#include "signature.h"
#include "message.h"
#include <stdarg.h>
void git_commit__free(void *_commit)
{
git_commit *commit = _commit;
git_array_clear(commit->parent_ids);
git_signature_free(commit->author);
git_signature_free(commit->committer);
git__free(commit->raw_header);
git__free(commit->raw_message);
git__free(commit->message_encoding);
git__free(commit->summary);
git__free(commit);
}
int git_commit_create_v(
git_oid *oid,
git_repository *repo,
const char *update_ref,
const git_signature *author,
const git_signature *committer,
const char *message_encoding,
const char *message,
const git_tree *tree,
int parent_count,
...)
{
va_list ap;
int i, res;
const git_commit **parents;
parents = git__malloc(parent_count * sizeof(git_commit *));
GITERR_CHECK_ALLOC(parents);
va_start(ap, parent_count);
for (i = 0; i < parent_count; ++i)
parents[i] = va_arg(ap, const git_commit *);
va_end(ap);
res = git_commit_create(
oid, repo, update_ref, author, committer,
message_encoding, message,
tree, parent_count, parents);
git__free((void *)parents);
return res;
}
int git_commit_create_from_oids(
git_oid *oid,
git_repository *repo,
const char *update_ref,
const git_signature *author,
const git_signature *committer,
const char *message_encoding,
const char *message,
const git_oid *tree,
int parent_count,
const git_oid *parents[])
{
git_buf commit = GIT_BUF_INIT;
int i;
git_odb *odb;
assert(oid && repo && tree && parent_count >= 0);
git_oid__writebuf(&commit, "tree ", tree);
for (i = 0; i < parent_count; ++i)
git_oid__writebuf(&commit, "parent ", parents[i]);
git_signature__writebuf(&commit, "author ", author);
git_signature__writebuf(&commit, "committer ", committer);
if (message_encoding != NULL)
git_buf_printf(&commit, "encoding %s\n", message_encoding);
git_buf_putc(&commit, '\n');
if (git_buf_puts(&commit, message) < 0)
goto on_error;
if (git_repository_odb__weakptr(&odb, repo) < 0)
goto on_error;
if (git_odb_write(oid, odb, commit.ptr, commit.size, GIT_OBJ_COMMIT) < 0)
goto on_error;
git_buf_free(&commit);
if (update_ref != NULL)
return git_reference__update_terminal(repo, update_ref, oid);
return 0;
on_error:
git_buf_free(&commit);
giterr_set(GITERR_OBJECT, "Failed to create commit.");
return -1;
}
int git_commit_create(
git_oid *oid,
git_repository *repo,
const char *update_ref,
const git_signature *author,
const git_signature *committer,
const char *message_encoding,
const char *message,
const git_tree *tree,
int parent_count,
const git_commit *parents[])
{
int retval, i;
const git_oid **parent_oids;
assert(parent_count >= 0);
assert(git_object_owner((const git_object *)tree) == repo);
parent_oids = git__malloc(parent_count * sizeof(git_oid *));
GITERR_CHECK_ALLOC(parent_oids);
for (i = 0; i < parent_count; ++i) {
assert(git_object_owner((const git_object *)parents[i]) == repo);
parent_oids[i] = git_object_id((const git_object *)parents[i]);
}
retval = git_commit_create_from_oids(
oid, repo, update_ref, author, committer,
message_encoding, message,
git_object_id((const git_object *)tree), parent_count, parent_oids);
git__free((void *)parent_oids);
return retval;
}
int git_commit__parse(void *_commit, git_odb_object *odb_obj)
{
git_commit *commit = _commit;
const char *buffer_start = git_odb_object_data(odb_obj), *buffer;
const char *buffer_end = buffer_start + git_odb_object_size(odb_obj);
git_oid parent_id;
uint32_t parent_count = 0;
size_t header_len;
/* find end-of-header (counting parents as we go) */
for (buffer = buffer_start; buffer < buffer_end; ++buffer) {
if (!strncmp("\n\n", buffer, 2)) {
++buffer;
break;
}
if (!strncmp("\nparent ", buffer, strlen("\nparent ")))
++parent_count;
}
header_len = buffer - buffer_start;
commit->raw_header = git__strndup(buffer_start, header_len);
GITERR_CHECK_ALLOC(commit->raw_header);
/* point "buffer" to header data */
buffer = commit->raw_header;
buffer_end = commit->raw_header + header_len;
if (parent_count < 1)
parent_count = 1;
git_array_init_to_size(commit->parent_ids, parent_count);
GITERR_CHECK_ARRAY(commit->parent_ids);
if (git_oid__parse(&commit->tree_id, &buffer, buffer_end, "tree ") < 0)
goto bad_buffer;
/*
* TODO: commit grafts!
*/
while (git_oid__parse(&parent_id, &buffer, buffer_end, "parent ") == 0) {
git_oid *new_id = git_array_alloc(commit->parent_ids);
GITERR_CHECK_ALLOC(new_id);
git_oid_cpy(new_id, &parent_id);
}
commit->author = git__malloc(sizeof(git_signature));
GITERR_CHECK_ALLOC(commit->author);
if (git_signature__parse(commit->author, &buffer, buffer_end, "author ", '\n') < 0)
return -1;
/* Always parse the committer; we need the commit time */
commit->committer = git__malloc(sizeof(git_signature));
GITERR_CHECK_ALLOC(commit->committer);
if (git_signature__parse(commit->committer, &buffer, buffer_end, "committer ", '\n') < 0)
return -1;
/* Parse add'l header entries */
while (buffer < buffer_end) {
const char *eoln = buffer;
while (eoln < buffer_end && *eoln != '\n')
++eoln;
if (git__prefixcmp(buffer, "encoding ") == 0) {
buffer += strlen("encoding ");
commit->message_encoding = git__strndup(buffer, eoln - buffer);
GITERR_CHECK_ALLOC(commit->message_encoding);
}
if (eoln < buffer_end && *eoln == '\n')
++eoln;
buffer = eoln;
}
/* point "buffer" to data after header */
buffer = git_odb_object_data(odb_obj);
buffer_end = buffer + git_odb_object_size(odb_obj);
buffer += header_len;
if (*buffer == '\n')
++buffer;
/* extract commit message */
if (buffer <= buffer_end) {
commit->raw_message = git__strndup(buffer, buffer_end - buffer);
GITERR_CHECK_ALLOC(commit->raw_message);
}
return 0;
bad_buffer:
giterr_set(GITERR_OBJECT, "Failed to parse bad commit object");
return -1;
}
#define GIT_COMMIT_GETTER(_rvalue, _name, _return) \
_rvalue git_commit_##_name(const git_commit *commit) \
{\
assert(commit); \
return _return; \
}
GIT_COMMIT_GETTER(const git_signature *, author, commit->author)
GIT_COMMIT_GETTER(const git_signature *, committer, commit->committer)
GIT_COMMIT_GETTER(const char *, message_raw, commit->raw_message)
GIT_COMMIT_GETTER(const char *, message_encoding, commit->message_encoding)
GIT_COMMIT_GETTER(const char *, raw_header, commit->raw_header)
GIT_COMMIT_GETTER(git_time_t, time, commit->committer->when.time)
GIT_COMMIT_GETTER(int, time_offset, commit->committer->when.offset)
GIT_COMMIT_GETTER(unsigned int, parentcount, (unsigned int)git_array_size(commit->parent_ids))
GIT_COMMIT_GETTER(const git_oid *, tree_id, &commit->tree_id);
const char *git_commit_message(const git_commit *commit)
{
const char *message;
assert(commit);
message = commit->raw_message;
/* trim leading newlines from raw message */
while (*message && *message == '\n')
++message;
return message;
}
const char *git_commit_summary(git_commit *commit)
{
git_buf summary = GIT_BUF_INIT;
const char *msg, *space;
assert(commit);
if (!commit->summary) {
for (msg = git_commit_message(commit), space = NULL; *msg; ++msg) {
if (msg[0] == '\n' && (!msg[1] || msg[1] == '\n'))
break;
else if (msg[0] == '\n')
git_buf_putc(&summary, ' ');
else if (git__isspace(msg[0]))
space = space ? space : msg;
else if (space) {
git_buf_put(&summary, space, (msg - space) + 1);
space = NULL;
} else
git_buf_putc(&summary, *msg);
}
commit->summary = git_buf_detach(&summary);
}
return commit->summary;
}
int git_commit_tree(git_tree **tree_out, const git_commit *commit)
{
assert(commit);
return git_tree_lookup(tree_out, commit->object.repo, &commit->tree_id);
}
const git_oid *git_commit_parent_id(
const git_commit *commit, unsigned int n)
{
assert(commit);
return git_array_get(commit->parent_ids, n);
}
int git_commit_parent(
git_commit **parent, const git_commit *commit, unsigned int n)
{
const git_oid *parent_id;
assert(commit);
parent_id = git_commit_parent_id(commit, n);
if (parent_id == NULL) {
giterr_set(GITERR_INVALID, "Parent %u does not exist", n);
return GIT_ENOTFOUND;
}
return git_commit_lookup(parent, commit->object.repo, parent_id);
}
int git_commit_nth_gen_ancestor(
git_commit **ancestor,
const git_commit *commit,
unsigned int n)
{
git_commit *current, *parent = NULL;
int error;
assert(ancestor && commit);
current = (git_commit *)commit;
if (n == 0)
return git_commit_lookup(
ancestor,
commit->object.repo,
git_object_id((const git_object *)commit));
while (n--) {
error = git_commit_parent(&parent, (git_commit *)current, 0);
if (current != commit)
git_commit_free(current);
if (error < 0)
return error;
current = parent;
}
*ancestor = parent;
return 0;
}
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