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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.
*/
#ifndef INCLUDE_git_commit_h__
#define INCLUDE_git_commit_h__
#include "common.h"
#include "types.h"
#include "oid.h"
#include "object.h"
/**
* @file git2/commit.h
* @brief Git commit parsing, formatting routines
* @defgroup git_commit Git commit parsing, formatting routines
* @ingroup Git
* @{
*/
GIT_BEGIN_DECL
/**
* Lookup a commit object from a repository.
*
* The returned object should be released with `git_commit_free` when no
* longer needed.
*
* @param commit pointer to the looked up commit
* @param repo the repo to use when locating the commit.
* @param id identity of the commit to locate. If the object is
* an annotated tag it will be peeled back to the commit.
* @return 0 or an error code
*/
GIT_EXTERN(int) git_commit_lookup(
git_commit **commit, git_repository *repo, const git_oid *id);
/**
* Lookup a commit object from a repository, given a prefix of its
* identifier (short id).
*
* The returned object should be released with `git_commit_free` when no
* longer needed.
*
* @see git_object_lookup_prefix
*
* @param commit pointer to the looked up commit
* @param repo the repo to use when locating the commit.
* @param id identity of the commit to locate. If the object is
* an annotated tag it will be peeled back to the commit.
* @param len the length of the short identifier
* @return 0 or an error code
*/
GIT_EXTERN(int) git_commit_lookup_prefix(
git_commit **commit, git_repository *repo, const git_oid *id, size_t len);
/**
* Close an open commit
*
* This is a wrapper around git_object_free()
*
* IMPORTANT:
* It *is* necessary to call this method when you stop
* using a commit. Failure to do so will cause a memory leak.
*
* @param commit the commit to close
*/
GIT_EXTERN(void) git_commit_free(git_commit *commit);
/**
* Get the id of a commit.
*
* @param commit a previously loaded commit.
* @return object identity for the commit.
*/
GIT_EXTERN(const git_oid *) git_commit_id(const git_commit *commit);
/**
* Get the repository that contains the commit.
*
* @param commit A previously loaded commit.
* @return Repository that contains this commit.
*/
GIT_EXTERN(git_repository *) git_commit_owner(const git_commit *commit);
/**
* Get the encoding for the message of a commit,
* as a string representing a standard encoding name.
*
* The encoding may be NULL if the `encoding` header
* in the commit is missing; in that case UTF-8 is assumed.
*
* @param commit a previously loaded commit.
* @return NULL, or the encoding
*/
GIT_EXTERN(const char *) git_commit_message_encoding(const git_commit *commit);
/**
* Get the full message of a commit.
*
* The returned message will be slightly prettified by removing any
* potential leading newlines.
*
* @param commit a previously loaded commit.
* @return the message of a commit
*/
GIT_EXTERN(const char *) git_commit_message(const git_commit *commit);
/**
* Get the full raw message of a commit.
*
* @param commit a previously loaded commit.
* @return the raw message of a commit
*/
GIT_EXTERN(const char *) git_commit_message_raw(const git_commit *commit);
/**
* Get the short "summary" of the git commit message.
*
* The returned message is the summary of the commit, comprising the
* first paragraph of the message with whitespace trimmed and squashed.
*
* @param commit a previously loaded commit.
* @return the summary of a commit or NULL on error
*/
GIT_EXTERN(const char *) git_commit_summary(git_commit *commit);
/**
* Get the commit time (i.e. committer time) of a commit.
*
* @param commit a previously loaded commit.
* @return the time of a commit
*/
GIT_EXTERN(git_time_t) git_commit_time(const git_commit *commit);
/**
* Get the commit timezone offset (i.e. committer's preferred timezone) of a commit.
*
* @param commit a previously loaded commit.
* @return positive or negative timezone offset, in minutes from UTC
*/
GIT_EXTERN(int) git_commit_time_offset(const git_commit *commit);
/**
* Get the committer of a commit.
*
* @param commit a previously loaded commit.
* @return the committer of a commit
*/
GIT_EXTERN(const git_signature *) git_commit_committer(const git_commit *commit);
/**
* Get the author of a commit.
*
* @param commit a previously loaded commit.
* @return the author of a commit
*/
GIT_EXTERN(const git_signature *) git_commit_author(const git_commit *commit);
/**
* Get the full raw text of the commit header.
*
* @param commit a previously loaded commit
* @return the header text of the commit
*/
GIT_EXTERN(const char *) git_commit_raw_header(const git_commit *commit);
/**
* Get the tree pointed to by a commit.
*
* @param tree_out pointer where to store the tree object
* @param commit a previously loaded commit.
* @return 0 or an error code
*/
GIT_EXTERN(int) git_commit_tree(git_tree **tree_out, const git_commit *commit);
/**
* Get the id of the tree pointed to by a commit. This differs from
* `git_commit_tree` in that no attempts are made to fetch an object
* from the ODB.
*
* @param commit a previously loaded commit.
* @return the id of tree pointed to by commit.
*/
GIT_EXTERN(const git_oid *) git_commit_tree_id(const git_commit *commit);
/**
* Get the number of parents of this commit
*
* @param commit a previously loaded commit.
* @return integer of count of parents
*/
GIT_EXTERN(unsigned int) git_commit_parentcount(const git_commit *commit);
/**
* Get the specified parent of the commit.
*
* @param out Pointer where to store the parent commit
* @param commit a previously loaded commit.
* @param n the position of the parent (from 0 to `parentcount`)
* @return 0 or an error code
*/
GIT_EXTERN(int) git_commit_parent(
git_commit **out,
const git_commit *commit,
unsigned int n);
/**
* Get the oid of a specified parent for a commit. This is different from
* `git_commit_parent`, which will attempt to load the parent commit from
* the ODB.
*
* @param commit a previously loaded commit.
* @param n the position of the parent (from 0 to `parentcount`)
* @return the id of the parent, NULL on error.
*/
GIT_EXTERN(const git_oid *) git_commit_parent_id(
const git_commit *commit,
unsigned int n);
/**
* Get the commit object that is the <n>th generation ancestor
* of the named commit object, following only the first parents.
* The returned commit has to be freed by the caller.
*
* Passing `0` as the generation number returns another instance of the
* base commit itself.
*
* @param ancestor Pointer where to store the ancestor commit
* @param commit a previously loaded commit.
* @param n the requested generation
* @return 0 on success; GIT_ENOTFOUND if no matching ancestor exists
* or an error code
*/
GIT_EXTERN(int) git_commit_nth_gen_ancestor(
git_commit **ancestor,
const git_commit *commit,
unsigned int n);
/**
* Create new commit in the repository from a list of `git_object` pointers
*
* The message will not be cleaned up automatically. You can do that with
* the `git_message_prettify()` function.
*
* @param id Pointer in which to store the OID of the newly created commit
*
* @param repo Repository where to store the commit
*
* @param update_ref If not NULL, name of the reference that
* will be updated to point to this commit. If the reference
* is not direct, it will be resolved to a direct reference.
* Use "HEAD" to update the HEAD of the current branch and
* make it point to this commit. If the reference doesn't
* exist yet, it will be created.
*
* @param author Signature with author and author time of commit
*
* @param committer Signature with committer and * commit time of commit
*
* @param message_encoding The encoding for the message in the
* commit, represented with a standard encoding name.
* E.g. "UTF-8". If NULL, no encoding header is written and
* UTF-8 is assumed.
*
* @param message Full message for this commit
*
* @param tree An instance of a `git_tree` object that will
* be used as the tree for the commit. This tree object must
* also be owned by the given `repo`.
*
* @param parent_count Number of parents for this commit
*
* @param parents Array of `parent_count` pointers to `git_commit`
* objects that will be used as the parents for this commit. This
* array may be NULL if `parent_count` is 0 (root commit). All the
* given commits must be owned by the `repo`.
*
* @return 0 or an error code
* The created commit will be written to the Object Database and
* the given reference will be updated to point to it
*/
GIT_EXTERN(int) git_commit_create(
git_oid *id,
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[]);
/**
* Create new commit in the repository using a variable argument list.
*
* The message will be cleaned up from excess whitespace and it will be made
* sure that the last line ends with a '\n'.
*
* The parents for the commit are specified as a variable list of pointers
* to `const git_commit *`. Note that this is a convenience method which may
* not be safe to export for certain languages or compilers
*
* All other parameters remain the same at `git_commit_create()`.
*
* @see git_commit_create
*/
GIT_EXTERN(int) git_commit_create_v(
git_oid *id,
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,
...);
/** @} */
GIT_END_DECL
#endif
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