547 lines
18 KiB
C
547 lines
18 KiB
C
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/*
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* Copyright (C) the libgit2 contributors. All rights reserved.
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#ifndef INCLUDE_git_commit_h__
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#define INCLUDE_git_commit_h__
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#include "common.h"
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#include "types.h"
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#include "oid.h"
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#include "object.h"
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/**
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* @file git2/commit.h
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* @brief Git commit parsing, formatting routines
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* @defgroup git_commit Git commit parsing, formatting routines
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* @ingroup Git
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* @{
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*/
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GIT_BEGIN_DECL
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/**
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* Lookup a commit object from a repository.
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*
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* The returned object should be released with `git_commit_free` when no
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* longer needed.
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*
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* @param commit pointer to the looked up commit
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* @param repo the repo to use when locating the commit.
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* @param id identity of the commit to locate. If the object is
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* an annotated tag it will be peeled back to the commit.
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* @return 0 or an error code
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*/
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GIT_EXTERN(int) git_commit_lookup(
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git_commit **commit, git_repository *repo, const git_oid *id);
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/**
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* Lookup a commit object from a repository, given a prefix of its
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* identifier (short id).
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*
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* The returned object should be released with `git_commit_free` when no
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* longer needed.
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*
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* @see git_object_lookup_prefix
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*
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* @param commit pointer to the looked up commit
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* @param repo the repo to use when locating the commit.
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* @param id identity of the commit to locate. If the object is
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* an annotated tag it will be peeled back to the commit.
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* @param len the length of the short identifier
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* @return 0 or an error code
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*/
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GIT_EXTERN(int) git_commit_lookup_prefix(
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git_commit **commit, git_repository *repo, const git_oid *id, size_t len);
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/**
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* Close an open commit
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*
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* This is a wrapper around git_object_free()
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*
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* IMPORTANT:
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* It *is* necessary to call this method when you stop
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* using a commit. Failure to do so will cause a memory leak.
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*
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* @param commit the commit to close
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*/
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GIT_EXTERN(void) git_commit_free(git_commit *commit);
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/**
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* Get the id of a commit.
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*
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* @param commit a previously loaded commit.
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* @return object identity for the commit.
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*/
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GIT_EXTERN(const git_oid *) git_commit_id(const git_commit *commit);
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/**
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* Get the repository that contains the commit.
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*
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* @param commit A previously loaded commit.
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* @return Repository that contains this commit.
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*/
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GIT_EXTERN(git_repository *) git_commit_owner(const git_commit *commit);
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/**
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* Get the encoding for the message of a commit,
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* as a string representing a standard encoding name.
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*
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* The encoding may be NULL if the `encoding` header
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* in the commit is missing; in that case UTF-8 is assumed.
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*
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* @param commit a previously loaded commit.
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* @return NULL, or the encoding
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*/
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GIT_EXTERN(const char *) git_commit_message_encoding(const git_commit *commit);
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/**
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* Get the full message of a commit.
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*
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* The returned message will be slightly prettified by removing any
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* potential leading newlines.
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*
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* @param commit a previously loaded commit.
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* @return the message of a commit
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*/
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GIT_EXTERN(const char *) git_commit_message(const git_commit *commit);
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/**
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* Get the full raw message of a commit.
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*
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* @param commit a previously loaded commit.
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* @return the raw message of a commit
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*/
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GIT_EXTERN(const char *) git_commit_message_raw(const git_commit *commit);
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/**
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* Get the short "summary" of the git commit message.
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*
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* The returned message is the summary of the commit, comprising the
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* first paragraph of the message with whitespace trimmed and squashed.
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*
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* @param commit a previously loaded commit.
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* @return the summary of a commit or NULL on error
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*/
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GIT_EXTERN(const char *) git_commit_summary(git_commit *commit);
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/**
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* Get the long "body" of the git commit message.
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*
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* The returned message is the body of the commit, comprising
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* everything but the first paragraph of the message. Leading and
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* trailing whitespaces are trimmed.
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*
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* @param commit a previously loaded commit.
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* @return the body of a commit or NULL when no the message only
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* consists of a summary
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*/
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GIT_EXTERN(const char *) git_commit_body(git_commit *commit);
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/**
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* Get the commit time (i.e. committer time) of a commit.
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*
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* @param commit a previously loaded commit.
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* @return the time of a commit
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*/
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GIT_EXTERN(git_time_t) git_commit_time(const git_commit *commit);
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/**
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* Get the commit timezone offset (i.e. committer's preferred timezone) of a commit.
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*
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* @param commit a previously loaded commit.
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* @return positive or negative timezone offset, in minutes from UTC
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*/
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GIT_EXTERN(int) git_commit_time_offset(const git_commit *commit);
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/**
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* Get the committer of a commit.
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*
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* @param commit a previously loaded commit.
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* @return the committer of a commit
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*/
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GIT_EXTERN(const git_signature *) git_commit_committer(const git_commit *commit);
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/**
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* Get the author of a commit.
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*
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* @param commit a previously loaded commit.
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* @return the author of a commit
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*/
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GIT_EXTERN(const git_signature *) git_commit_author(const git_commit *commit);
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/**
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* Get the committer of a commit, using the mailmap to map names and email
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* addresses to canonical real names and email addresses.
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*
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* Call `git_signature_free` to free the signature.
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*
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* @param out a pointer to store the resolved signature.
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* @param commit a previously loaded commit.
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* @param mailmap the mailmap to resolve with. (may be NULL)
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* @return 0 or an error code
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*/
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GIT_EXTERN(int) git_commit_committer_with_mailmap(
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git_signature **out, const git_commit *commit, const git_mailmap *mailmap);
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/**
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* Get the author of a commit, using the mailmap to map names and email
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* addresses to canonical real names and email addresses.
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*
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* Call `git_signature_free` to free the signature.
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*
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* @param out a pointer to store the resolved signature.
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* @param commit a previously loaded commit.
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* @param mailmap the mailmap to resolve with. (may be NULL)
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* @return 0 or an error code
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*/
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GIT_EXTERN(int) git_commit_author_with_mailmap(
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git_signature **out, const git_commit *commit, const git_mailmap *mailmap);
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/**
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* Get the full raw text of the commit header.
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*
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* @param commit a previously loaded commit
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* @return the header text of the commit
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*/
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GIT_EXTERN(const char *) git_commit_raw_header(const git_commit *commit);
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/**
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* Get the tree pointed to by a commit.
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*
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* @param tree_out pointer where to store the tree object
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* @param commit a previously loaded commit.
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* @return 0 or an error code
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*/
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GIT_EXTERN(int) git_commit_tree(git_tree **tree_out, const git_commit *commit);
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/**
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* Get the id of the tree pointed to by a commit. This differs from
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* `git_commit_tree` in that no attempts are made to fetch an object
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* from the ODB.
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*
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* @param commit a previously loaded commit.
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* @return the id of tree pointed to by commit.
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*/
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GIT_EXTERN(const git_oid *) git_commit_tree_id(const git_commit *commit);
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/**
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* Get the number of parents of this commit
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*
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* @param commit a previously loaded commit.
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* @return integer of count of parents
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*/
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GIT_EXTERN(unsigned int) git_commit_parentcount(const git_commit *commit);
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/**
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* Get the specified parent of the commit.
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*
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* @param out Pointer where to store the parent commit
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* @param commit a previously loaded commit.
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* @param n the position of the parent (from 0 to `parentcount`)
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* @return 0 or an error code
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*/
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GIT_EXTERN(int) git_commit_parent(
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git_commit **out,
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const git_commit *commit,
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unsigned int n);
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/**
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* Get the oid of a specified parent for a commit. This is different from
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* `git_commit_parent`, which will attempt to load the parent commit from
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* the ODB.
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*
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* @param commit a previously loaded commit.
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* @param n the position of the parent (from 0 to `parentcount`)
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* @return the id of the parent, NULL on error.
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*/
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GIT_EXTERN(const git_oid *) git_commit_parent_id(
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const git_commit *commit,
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unsigned int n);
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/**
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* Get the commit object that is the <n>th generation ancestor
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* of the named commit object, following only the first parents.
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* The returned commit has to be freed by the caller.
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*
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* Passing `0` as the generation number returns another instance of the
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* base commit itself.
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*
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* @param ancestor Pointer where to store the ancestor commit
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* @param commit a previously loaded commit.
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* @param n the requested generation
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* @return 0 on success; GIT_ENOTFOUND if no matching ancestor exists
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* or an error code
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*/
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GIT_EXTERN(int) git_commit_nth_gen_ancestor(
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git_commit **ancestor,
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const git_commit *commit,
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unsigned int n);
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/**
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* Get an arbitrary header field
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*
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* @param out the buffer to fill; existing content will be
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* overwritten
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* @param commit the commit to look in
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* @param field the header field to return
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* @return 0 on succeess, GIT_ENOTFOUND if the field does not exist,
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* or an error code
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*/
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GIT_EXTERN(int) git_commit_header_field(git_buf *out, const git_commit *commit, const char *field);
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/**
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* Extract the signature from a commit
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*
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* If the id is not for a commit, the error class will be
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* `GIT_ERROR_INVALID`. If the commit does not have a signature, the
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* error class will be `GIT_ERROR_OBJECT`.
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*
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* @param signature the signature block; existing content will be
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* overwritten
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* @param signed_data signed data; this is the commit contents minus the signature block;
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* existing content will be overwritten
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* @param repo the repository in which the commit exists
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* @param commit_id the commit from which to extract the data
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* @param field the name of the header field containing the signature
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* block; pass `NULL` to extract the default 'gpgsig'
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* @return 0 on success, GIT_ENOTFOUND if the id is not for a commit
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* or the commit does not have a signature.
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*/
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GIT_EXTERN(int) git_commit_extract_signature(git_buf *signature, git_buf *signed_data, git_repository *repo, git_oid *commit_id, const char *field);
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/**
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* Create new commit in the repository from a list of `git_object` pointers
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*
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* The message will **not** be cleaned up automatically. You can do that
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* with the `git_message_prettify()` function.
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*
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* @param id Pointer in which to store the OID of the newly created commit
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*
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* @param repo Repository where to store the commit
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*
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* @param update_ref If not NULL, name of the reference that
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* will be updated to point to this commit. If the reference
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* is not direct, it will be resolved to a direct reference.
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* Use "HEAD" to update the HEAD of the current branch and
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* make it point to this commit. If the reference doesn't
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* exist yet, it will be created. If it does exist, the first
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* parent must be the tip of this branch.
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*
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* @param author Signature with author and author time of commit
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*
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* @param committer Signature with committer and * commit time of commit
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*
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* @param message_encoding The encoding for the message in the
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* commit, represented with a standard encoding name.
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* E.g. "UTF-8". If NULL, no encoding header is written and
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* UTF-8 is assumed.
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*
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* @param message Full message for this commit
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*
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* @param tree An instance of a `git_tree` object that will
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* be used as the tree for the commit. This tree object must
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* also be owned by the given `repo`.
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*
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* @param parent_count Number of parents for this commit
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*
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* @param parents Array of `parent_count` pointers to `git_commit`
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* objects that will be used as the parents for this commit. This
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* array may be NULL if `parent_count` is 0 (root commit). All the
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* given commits must be owned by the `repo`.
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*
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* @return 0 or an error code
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* The created commit will be written to the Object Database and
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* the given reference will be updated to point to it
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*/
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GIT_EXTERN(int) git_commit_create(
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git_oid *id,
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git_repository *repo,
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const char *update_ref,
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const git_signature *author,
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const git_signature *committer,
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const char *message_encoding,
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const char *message,
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const git_tree *tree,
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size_t parent_count,
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const git_commit *parents[]);
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/**
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* Create new commit in the repository using a variable argument list.
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||
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|
*
|
||
|
|
* The message will **not** be cleaned up automatically. You can do that
|
||
|
|
* with the `git_message_prettify()` function.
|
||
|
|
*
|
||
|
|
* 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 as `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,
|
||
|
|
size_t parent_count,
|
||
|
|
...);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Amend an existing commit by replacing only non-NULL values.
|
||
|
|
*
|
||
|
|
* This creates a new commit that is exactly the same as the old commit,
|
||
|
|
* except that any non-NULL values will be updated. The new commit has
|
||
|
|
* the same parents as the old commit.
|
||
|
|
*
|
||
|
|
* The `update_ref` value works as in the regular `git_commit_create()`,
|
||
|
|
* updating the ref to point to the newly rewritten commit. If you want
|
||
|
|
* to amend a commit that is not currently the tip of the branch and then
|
||
|
|
* rewrite the following commits to reach a ref, pass this as NULL and
|
||
|
|
* update the rest of the commit chain and ref separately.
|
||
|
|
*
|
||
|
|
* Unlike `git_commit_create()`, the `author`, `committer`, `message`,
|
||
|
|
* `message_encoding`, and `tree` parameters can be NULL in which case this
|
||
|
|
* will use the values from the original `commit_to_amend`.
|
||
|
|
*
|
||
|
|
* All parameters have the same meanings as in `git_commit_create()`.
|
||
|
|
*
|
||
|
|
* @see git_commit_create
|
||
|
|
*/
|
||
|
|
GIT_EXTERN(int) git_commit_amend(
|
||
|
|
git_oid *id,
|
||
|
|
const git_commit *commit_to_amend,
|
||
|
|
const char *update_ref,
|
||
|
|
const git_signature *author,
|
||
|
|
const git_signature *committer,
|
||
|
|
const char *message_encoding,
|
||
|
|
const char *message,
|
||
|
|
const git_tree *tree);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create a commit and write it into a buffer
|
||
|
|
*
|
||
|
|
* Create a commit as with `git_commit_create()` but instead of
|
||
|
|
* writing it to the objectdb, write the contents of the object into a
|
||
|
|
* buffer.
|
||
|
|
*
|
||
|
|
* @param out the buffer into which to write the commit object content
|
||
|
|
*
|
||
|
|
* @param repo Repository where the referenced tree and parents live
|
||
|
|
*
|
||
|
|
* @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
|
||
|
|
*/
|
||
|
|
GIT_EXTERN(int) git_commit_create_buffer(
|
||
|
|
git_buf *out,
|
||
|
|
git_repository *repo,
|
||
|
|
const git_signature *author,
|
||
|
|
const git_signature *committer,
|
||
|
|
const char *message_encoding,
|
||
|
|
const char *message,
|
||
|
|
const git_tree *tree,
|
||
|
|
size_t parent_count,
|
||
|
|
const git_commit *parents[]);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create a commit object from the given buffer and signature
|
||
|
|
*
|
||
|
|
* Given the unsigned commit object's contents, its signature and the
|
||
|
|
* header field in which to store the signature, attach the signature
|
||
|
|
* to the commit and write it into the given repository.
|
||
|
|
*
|
||
|
|
* @param out the resulting commit id
|
||
|
|
* @param repo the repository to create the commit in.
|
||
|
|
* @param commit_content the content of the unsigned commit object
|
||
|
|
* @param signature the signature to add to the commit. Leave `NULL`
|
||
|
|
* to create a commit without adding a signature field.
|
||
|
|
* @param signature_field which header field should contain this
|
||
|
|
* signature. Leave `NULL` for the default of "gpgsig"
|
||
|
|
* @return 0 or an error code
|
||
|
|
*/
|
||
|
|
GIT_EXTERN(int) git_commit_create_with_signature(
|
||
|
|
git_oid *out,
|
||
|
|
git_repository *repo,
|
||
|
|
const char *commit_content,
|
||
|
|
const char *signature,
|
||
|
|
const char *signature_field);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create an in-memory copy of a commit. The copy must be explicitly
|
||
|
|
* free'd or it will leak.
|
||
|
|
*
|
||
|
|
* @param out Pointer to store the copy of the commit
|
||
|
|
* @param source Original commit to copy
|
||
|
|
* @return 0
|
||
|
|
*/
|
||
|
|
GIT_EXTERN(int) git_commit_dup(git_commit **out, git_commit *source);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Commit creation callback: used when a function is going to create
|
||
|
|
* commits (for example, in `git_rebase_commit`) to allow callers to
|
||
|
|
* override the commit creation behavior. For example, users may
|
||
|
|
* wish to sign commits by providing this information to
|
||
|
|
* `git_commit_create_buffer`, signing that buffer, then calling
|
||
|
|
* `git_commit_create_with_signature`. The resultant commit id
|
||
|
|
* should be set in the `out` object id parameter.
|
||
|
|
*
|
||
|
|
* @param out pointer that this callback will populate with the object
|
||
|
|
* id of the commit that is created
|
||
|
|
* @param author the author name and time of the commit
|
||
|
|
* @param committer the committer name and time of the commit
|
||
|
|
* @param message_encoding the encoding of the given message, or NULL
|
||
|
|
* to assume UTF8
|
||
|
|
* @param message the commit message
|
||
|
|
* @param tree the tree to be committed
|
||
|
|
* @param parent_count the number of parents for this commit
|
||
|
|
* @param parents the commit parents
|
||
|
|
* @param payload the payload pointer in the rebase options
|
||
|
|
* @return 0 if this callback has created the commit and populated the out
|
||
|
|
* parameter, GIT_PASSTHROUGH if the callback has not created a
|
||
|
|
* commit and wants the calling function to create the commit as
|
||
|
|
* if no callback had been specified, any other value to stop
|
||
|
|
* and return a failure
|
||
|
|
*/
|
||
|
|
typedef int (*git_commit_create_cb)(
|
||
|
|
git_oid *out,
|
||
|
|
const git_signature *author,
|
||
|
|
const git_signature *committer,
|
||
|
|
const char *message_encoding,
|
||
|
|
const char *message,
|
||
|
|
const git_tree *tree,
|
||
|
|
size_t parent_count,
|
||
|
|
const git_commit *parents[],
|
||
|
|
void *payload);
|
||
|
|
|
||
|
|
/** @} */
|
||
|
|
GIT_END_DECL
|
||
|
|
#endif
|