text: /*
   * 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_describe_h__
  #define INCLUDE_git_describe_h__
  
  #include "common.h"
  #include "types.h"
  #include "buffer.h"
  
  /**
   * @file git2/describe.h
   * @brief Git describing routines
   * @defgroup git_describe Git describing routines
   * @ingroup Git
   * @{
   */
  GIT_BEGIN_DECL
  
  /**
   * Reference lookup strategy
   *
   * These behave like the --tags and --all optios to git-describe,
   * namely they say to look for any reference in either refs/tags/ or
   * refs/ respectively.
   */
  typedef enum {
  	GIT_DESCRIBE_DEFAULT,
  	GIT_DESCRIBE_TAGS,
  	GIT_DESCRIBE_ALL,
  } git_describe_strategy_t;
  
  /**
   * Describe options structure
   *
   * Initialize with `GIT_DESCRIBE_OPTIONS_INIT` macro to correctly set
   * the `version` field.  E.g.
   *
   *		git_describe_options opts = GIT_DESCRIBE_OPTIONS_INIT;
   */
  typedef struct git_describe_options {
  	unsigned int version;
  
  	unsigned int max_candidates_tags; /** default: 10 */
  	unsigned int describe_strategy; /** default: GIT_DESCRIBE_DEFAULT */
  	const char *pattern;
  	/**
  	 * When calculating the distance from the matching tag or
  	 * reference, only walk down the first-parent ancestry.
  	 */
  	int only_follow_first_parent;
  	/**
  	 * If no matching tag or reference is found, the describe
  	 * operation would normally fail. If this option is set, it
  	 * will instead fall back to showing the full id of the
  	 * commit.
  	 */
  	int show_commit_oid_as_fallback;
  } git_describe_options;
  
  #define GIT_DESCRIBE_DEFAULT_MAX_CANDIDATES_TAGS 10
  #define GIT_DESCRIBE_DEFAULT_ABBREVIATED_SIZE 7
  
  #define GIT_DESCRIBE_OPTIONS_VERSION 1
  #define GIT_DESCRIBE_OPTIONS_INIT { \
  	GIT_DESCRIBE_OPTIONS_VERSION, \
  	GIT_DESCRIBE_DEFAULT_MAX_CANDIDATES_TAGS, \
  }
  
  GIT_EXTERN(int) git_describe_init_options(git_describe_options *opts, unsigned int version);
  
  /**
   * Options for formatting the describe string
   */
  typedef struct {
  	unsigned int version;
  
  	/**
  	 * Size of the abbreviated commit id to use. This value is the
  	 * lower bound for the length of the abbreviated string. The
  	 * default is 7.
  	 */
  	unsigned int abbreviated_size;
  
  	/**
  	 * Set to use the long format even when a shorter name could be used.
  	 */
  	int always_use_long_format;
  
  	/**
  	 * If the workdir is dirty and this is set, this string will
  	 * be appended to the description string.
  	 */
  	char *dirty_suffix;
  } git_describe_format_options;
  
  #define GIT_DESCRIBE_FORMAT_OPTIONS_VERSION 1
  #define GIT_DESCRIBE_FORMAT_OPTIONS_INIT { \
  		GIT_DESCRIBE_FORMAT_OPTIONS_VERSION,   \
  		GIT_DESCRIBE_DEFAULT_ABBREVIATED_SIZE, \
   }
  
  GIT_EXTERN(int) git_describe_init_format_options(git_describe_format_options *opts, unsigned int version);
  
  typedef struct git_describe_result git_describe_result;
  
  /**
   * Describe a commit
   *
   * Perform the describe operation on the given committish object.
   *
   * @param result pointer to store the result. You must free this once
   * you're done with it.
   * @param committish a committish to describe
   * @param opts the lookup options
   */
  GIT_EXTERN(int) git_describe_commit(
  	git_describe_result **result,
  	git_object *committish,
  	git_describe_options *opts);
  
  /**
   * Describe a commit
   *
   * Perform the describe operation on the current commit and the
   * worktree. After peforming describe on HEAD, a status is run and the
   * description is considered to be dirty if there are.
   *
   * @param result pointer to store the result. You must free this once
   * you're done with it.
   * @param repo the repository in which to perform the describe
   * @param opts the lookup options
   */
  GIT_EXTERN(int) git_describe_workdir(
  	git_describe_result **out,
  	git_repository *repo,
  	git_describe_options *opts);
  
  /**
   * Print the describe result to a buffer
   *
   * @param result the result from `git_describe_commit()` or
   * `git_describe_workdir()`.
   * @param opt the formatting options
   */
  GIT_EXTERN(int) git_describe_format(
  	git_buf *out,
  	const git_describe_result *result,
  	const git_describe_format_options *opts);
  
  /**
   * Free the describe result.
   */
  GIT_EXTERN(void) git_describe_result_free(git_describe_result *result);
  
  /** @} */
  GIT_END_DECL
  
  #endif
  