ATBTariffWebInterface/libgit2-1.7.2/include/git2/revwalk.h

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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_revwalk_h__
#define INCLUDE_git_revwalk_h__
#include "common.h"
#include "types.h"
#include "oid.h"
/**
* @file git2/revwalk.h
* @brief Git revision traversal routines
* @defgroup git_revwalk Git revision traversal routines
* @ingroup Git
* @{
*/
GIT_BEGIN_DECL
/**
* Flags to specify the sorting which a revwalk should perform.
*/
typedef enum {
/**
* Sort the output with the same default method from `git`: reverse
* chronological order. This is the default sorting for new walkers.
*/
GIT_SORT_NONE = 0,
/**
* Sort the repository contents in topological order (no parents before
* all of its children are shown); this sorting mode can be combined
* with time sorting to produce `git`'s `--date-order``.
*/
GIT_SORT_TOPOLOGICAL = 1 << 0,
/**
* Sort the repository contents by commit time;
* this sorting mode can be combined with
* topological sorting.
*/
GIT_SORT_TIME = 1 << 1,
/**
* Iterate through the repository contents in reverse
* order; this sorting mode can be combined with
* any of the above.
*/
GIT_SORT_REVERSE = 1 << 2
} git_sort_t;
/**
* Allocate a new revision walker to iterate through a repo.
*
* This revision walker uses a custom memory pool and an internal
* commit cache, so it is relatively expensive to allocate.
*
* For maximum performance, this revision walker should be
* reused for different walks.
*
* This revision walker is *not* thread safe: it may only be
* used to walk a repository on a single thread; however,
* it is possible to have several revision walkers in
* several different threads walking the same repository.
*
* @param out pointer to the new revision walker
* @param repo the repo to walk through
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_new(git_revwalk **out, git_repository *repo);
/**
* Reset the revision walker for reuse.
*
* This will clear all the pushed and hidden commits, and
* leave the walker in a blank state (just like at
* creation) ready to receive new commit pushes and
* start a new walk.
*
* The revision walk is automatically reset when a walk
* is over.
*
* @param walker handle to reset.
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_reset(git_revwalk *walker);
/**
* Add a new root for the traversal
*
* The pushed commit will be marked as one of the roots from which to
* start the walk. This commit may not be walked if it or a child is
* hidden.
*
* At least one commit must be pushed onto the walker before a walk
* can be started.
*
* The given id must belong to a committish on the walked
* repository.
*
* @param walk the walker being used for the traversal.
* @param id the oid of the commit to start from.
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_push(git_revwalk *walk, const git_oid *id);
/**
* Push matching references
*
* The OIDs pointed to by the references that match the given glob
* pattern will be pushed to the revision walker.
*
* A leading 'refs/' is implied if not present as well as a trailing
* '/\*' if the glob lacks '?', '\*' or '['.
*
* Any references matching this glob which do not point to a
* committish will be ignored.
*
* @param walk the walker being used for the traversal
* @param glob the glob pattern references should match
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_push_glob(git_revwalk *walk, const char *glob);
/**
* Push the repository's HEAD
*
* @param walk the walker being used for the traversal
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_push_head(git_revwalk *walk);
/**
* Mark a commit (and its ancestors) uninteresting for the output.
*
* The given id must belong to a committish on the walked
* repository.
*
* The resolved commit and all its parents will be hidden from the
* output on the revision walk.
*
* @param walk the walker being used for the traversal.
* @param commit_id the oid of commit that will be ignored during the traversal
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_hide(git_revwalk *walk, const git_oid *commit_id);
/**
* Hide matching references.
*
* The OIDs pointed to by the references that match the given glob
* pattern and their ancestors will be hidden from the output on the
* revision walk.
*
* A leading 'refs/' is implied if not present as well as a trailing
* '/\*' if the glob lacks '?', '\*' or '['.
*
* Any references matching this glob which do not point to a
* committish will be ignored.
*
* @param walk the walker being used for the traversal
* @param glob the glob pattern references should match
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_hide_glob(git_revwalk *walk, const char *glob);
/**
* Hide the repository's HEAD
*
* @param walk the walker being used for the traversal
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_hide_head(git_revwalk *walk);
/**
* Push the OID pointed to by a reference
*
* The reference must point to a committish.
*
* @param walk the walker being used for the traversal
* @param refname the reference to push
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_push_ref(git_revwalk *walk, const char *refname);
/**
* Hide the OID pointed to by a reference
*
* The reference must point to a committish.
*
* @param walk the walker being used for the traversal
* @param refname the reference to hide
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_hide_ref(git_revwalk *walk, const char *refname);
/**
* Get the next commit from the revision walk.
*
* The initial call to this method is *not* blocking when
* iterating through a repo with a time-sorting mode.
*
* Iterating with Topological or inverted modes makes the initial
* call blocking to preprocess the commit list, but this block should be
* mostly unnoticeable on most repositories (topological preprocessing
* times at 0.3s on the git.git repo).
*
* The revision walker is reset when the walk is over.
*
* @param out Pointer where to store the oid of the next commit
* @param walk the walker to pop the commit from.
* @return 0 if the next commit was found;
* GIT_ITEROVER if there are no commits left to iterate
*/
GIT_EXTERN(int) git_revwalk_next(git_oid *out, git_revwalk *walk);
/**
* Change the sorting mode when iterating through the
* repository's contents.
*
* Changing the sorting mode resets the walker.
*
* @param walk the walker being used for the traversal.
* @param sort_mode combination of GIT_SORT_XXX flags
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_sorting(git_revwalk *walk, unsigned int sort_mode);
/**
* Push and hide the respective endpoints of the given range.
*
* The range should be of the form
* <commit>..<commit>
* where each <commit> is in the form accepted by 'git_revparse_single'.
* The left-hand commit will be hidden and the right-hand commit pushed.
*
* @param walk the walker being used for the traversal
* @param range the range
* @return 0 or an error code
*
*/
GIT_EXTERN(int) git_revwalk_push_range(git_revwalk *walk, const char *range);
/**
* Simplify the history by first-parent
*
* No parents other than the first for each commit will be enqueued.
*
* @param walk The revision walker.
* @return 0 or an error code
*/
GIT_EXTERN(int) git_revwalk_simplify_first_parent(git_revwalk *walk);
/**
* Free a revision walker previously allocated.
*
* @param walk traversal handle to close. If NULL nothing occurs.
*/
GIT_EXTERN(void) git_revwalk_free(git_revwalk *walk);
/**
* Return the repository on which this walker
* is operating.
*
* @param walk the revision walker
* @return the repository being walked
*/
GIT_EXTERN(git_repository *) git_revwalk_repository(git_revwalk *walk);
/**
* This is a callback function that user can provide to hide a
* commit and its parents. If the callback function returns non-zero value,
* then this commit and its parents will be hidden.
*
* @param commit_id oid of Commit
* @param payload User-specified pointer to data to be passed as data payload
* @return non-zero to hide the commmit and it parent.
*/
typedef int GIT_CALLBACK(git_revwalk_hide_cb)(
const git_oid *commit_id,
void *payload);
/**
* Adds, changes or removes a callback function to hide a commit and its parents
*
* @param walk the revision walker
* @param hide_cb callback function to hide a commit and its parents
* @param payload data payload to be passed to callback function
* @return 0 or an error code.
*/
GIT_EXTERN(int) git_revwalk_add_hide_cb(
git_revwalk *walk,
git_revwalk_hide_cb hide_cb,
void *payload);
/** @} */
GIT_END_DECL
#endif