286 lines
7.7 KiB
C
286 lines
7.7 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_blame_h__
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#define INCLUDE_git_blame_h__
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#include "common.h"
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#include "oid.h"
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/**
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* @file git2/blame.h
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* @brief Git blame routines
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* @defgroup git_blame Git blame 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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* Flags for indicating option behavior for git_blame APIs.
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*/
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typedef enum {
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/** Normal blame, the default */
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GIT_BLAME_NORMAL = 0,
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/**
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* Track lines that have moved within a file (like `git blame -M`).
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*
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* This is not yet implemented and reserved for future use.
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*/
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GIT_BLAME_TRACK_COPIES_SAME_FILE = (1<<0),
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/**
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* Track lines that have moved across files in the same commit
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* (like `git blame -C`).
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*
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* This is not yet implemented and reserved for future use.
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*/
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GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES = (1<<1),
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/**
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* Track lines that have been copied from another file that exists
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* in the same commit (like `git blame -CC`). Implies SAME_FILE.
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*
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* This is not yet implemented and reserved for future use.
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*/
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GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES = (1<<2),
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/**
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* Track lines that have been copied from another file that exists in
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* *any* commit (like `git blame -CCC`). Implies SAME_COMMIT_COPIES.
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*
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* This is not yet implemented and reserved for future use.
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*/
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GIT_BLAME_TRACK_COPIES_ANY_COMMIT_COPIES = (1<<3),
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/**
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* Restrict the search of commits to those reachable following only
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* the first parents.
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*/
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GIT_BLAME_FIRST_PARENT = (1<<4),
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/**
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* Use mailmap file to map author and committer names and email
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* addresses to canonical real names and email addresses. The
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* mailmap will be read from the working directory, or HEAD in a
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* bare repository.
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*/
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GIT_BLAME_USE_MAILMAP = (1<<5),
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/** Ignore whitespace differences */
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GIT_BLAME_IGNORE_WHITESPACE = (1<<6)
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} git_blame_flag_t;
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/**
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* Blame options structure
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*
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* Initialize with `GIT_BLAME_OPTIONS_INIT`. Alternatively, you can
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* use `git_blame_options_init`.
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*
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*/
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typedef struct git_blame_options {
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unsigned int version;
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/** A combination of `git_blame_flag_t` */
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uint32_t flags;
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/**
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* The lower bound on the number of alphanumeric characters that
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* must be detected as moving/copying within a file for it to
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* associate those lines with the parent commit. The default value
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* is 20.
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*
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* This value only takes effect if any of the `GIT_BLAME_TRACK_COPIES_*`
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* flags are specified.
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*/
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uint16_t min_match_characters;
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/** The id of the newest commit to consider. The default is HEAD. */
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git_oid newest_commit;
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/**
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* The id of the oldest commit to consider.
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* The default is the first commit encountered with a NULL parent.
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*/
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git_oid oldest_commit;
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/**
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* The first line in the file to blame.
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* The default is 1 (line numbers start with 1).
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*/
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size_t min_line;
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/**
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* The last line in the file to blame.
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* The default is the last line of the file.
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*/
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size_t max_line;
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} git_blame_options;
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#define GIT_BLAME_OPTIONS_VERSION 1
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#define GIT_BLAME_OPTIONS_INIT {GIT_BLAME_OPTIONS_VERSION}
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/**
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* Initialize git_blame_options structure
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*
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* Initializes a `git_blame_options` with default values. Equivalent to creating
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* an instance with GIT_BLAME_OPTIONS_INIT.
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*
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* @param opts The `git_blame_options` struct to initialize.
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* @param version The struct version; pass `GIT_BLAME_OPTIONS_VERSION`.
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* @return Zero on success; -1 on failure.
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*/
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GIT_EXTERN(int) git_blame_options_init(
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git_blame_options *opts,
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unsigned int version);
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/**
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* Structure that represents a blame hunk.
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*/
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typedef struct git_blame_hunk {
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/**
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* The number of lines in this hunk.
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*/
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size_t lines_in_hunk;
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/**
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* The OID of the commit where this line was last changed.
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*/
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git_oid final_commit_id;
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/**
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* The 1-based line number where this hunk begins, in the final version
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* of the file.
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*/
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size_t final_start_line_number;
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/**
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* The author of `final_commit_id`. If `GIT_BLAME_USE_MAILMAP` has been
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* specified, it will contain the canonical real name and email address.
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*/
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git_signature *final_signature;
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/**
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* The OID of the commit where this hunk was found.
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* This will usually be the same as `final_commit_id`, except when
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* `GIT_BLAME_TRACK_COPIES_ANY_COMMIT_COPIES` has been specified.
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*/
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git_oid orig_commit_id;
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/**
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* The path to the file where this hunk originated, as of the commit
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* specified by `orig_commit_id`.
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*/
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const char *orig_path;
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/**
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* The 1-based line number where this hunk begins in the file named by
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* `orig_path` in the commit specified by `orig_commit_id`.
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*/
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size_t orig_start_line_number;
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/**
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* The author of `orig_commit_id`. If `GIT_BLAME_USE_MAILMAP` has been
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* specified, it will contain the canonical real name and email address.
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*/
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git_signature *orig_signature;
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/**
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* The 1 iff the hunk has been tracked to a boundary commit (the root,
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* or the commit specified in git_blame_options.oldest_commit)
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*/
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char boundary;
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} git_blame_hunk;
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/** Opaque structure to hold blame results */
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typedef struct git_blame git_blame;
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/**
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* Gets the number of hunks that exist in the blame structure.
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*
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* @param blame The blame structure to query.
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* @return The number of hunks.
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*/
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GIT_EXTERN(uint32_t) git_blame_get_hunk_count(git_blame *blame);
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/**
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* Gets the blame hunk at the given index.
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*
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* @param blame the blame structure to query
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* @param index index of the hunk to retrieve
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* @return the hunk at the given index, or NULL on error
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*/
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GIT_EXTERN(const git_blame_hunk*) git_blame_get_hunk_byindex(
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git_blame *blame,
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uint32_t index);
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/**
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* Gets the hunk that relates to the given line number in the newest commit.
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*
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* @param blame the blame structure to query
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* @param lineno the (1-based) line number to find a hunk for
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* @return the hunk that contains the given line, or NULL on error
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*/
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GIT_EXTERN(const git_blame_hunk*) git_blame_get_hunk_byline(
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git_blame *blame,
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size_t lineno);
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/**
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* Get the blame for a single file.
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*
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* @param out pointer that will receive the blame object
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* @param repo repository whose history is to be walked
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* @param path path to file to consider
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* @param options options for the blame operation. If NULL, this is treated as
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* though GIT_BLAME_OPTIONS_INIT were passed.
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* @return 0 on success, or an error code. (use git_error_last for information
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* about the error.)
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*/
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GIT_EXTERN(int) git_blame_file(
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git_blame **out,
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git_repository *repo,
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const char *path,
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git_blame_options *options);
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/**
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* Get blame data for a file that has been modified in memory. The `reference`
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* parameter is a pre-calculated blame for the in-odb history of the file. This
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* means that once a file blame is completed (which can be expensive), updating
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* the buffer blame is very fast.
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*
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* Lines that differ between the buffer and the committed version are marked as
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* having a zero OID for their final_commit_id.
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*
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* @param out pointer that will receive the resulting blame data
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* @param reference cached blame from the history of the file (usually the output
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* from git_blame_file)
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* @param buffer the (possibly) modified contents of the file
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* @param buffer_len number of valid bytes in the buffer
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* @return 0 on success, or an error code. (use git_error_last for information
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* about the error)
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*/
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GIT_EXTERN(int) git_blame_buffer(
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git_blame **out,
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git_blame *reference,
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const char *buffer,
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size_t buffer_len);
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/**
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* Free memory allocated by git_blame_file or git_blame_buffer.
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*
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* @param blame the blame structure to free
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*/
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GIT_EXTERN(void) git_blame_free(git_blame *blame);
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/** @} */
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GIT_END_DECL
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#endif
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