thodg/libgit2/src/config_cache.c

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• Hash : 9f77b3f6
  Author :
  Date : 2013-11-25T14:21:34
  

  Add config read fns with controlled error behavior
  
  This adds `git_config__lookup_entry` which will look up a key in
  a config and return either the entry or NULL if the key was not
  present.  Optionally, it can either suppress all errors or can
  return them (although not finding the key is not an error for this
  function).  Unlike other accessors, this does not normalize the
  config key string, so it must only be used when the key is known
  to be in normalized form (i.e. all lower-case before the first dot
  and after the last dot, with no invalid characters).
  
  This also adds three high-level helper functions to look up config
  values with no errors and a fallback value.  The three functions
  are for string, bool, and int values, and will resort to the
  fallback value for any error that arises.  They are:
  
  * `git_config__get_string_force`
  * `git_config__get_bool_force`
  * `git_config__get_int_force`
  
  None of them normalize the config `key` either, so they can only
  be used for internal cases where the key is known to be in normal
  format.
  

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• src/config_cache.c

• /*
   * 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.
   */
  
  #include "common.h"
  #include "fileops.h"
  #include "config.h"
  #include "git2/config.h"
  #include "vector.h"
  #include "filter.h"
  #include "repository.h"
  
  struct map_data {
  	const char *cvar_name;
  	git_cvar_map *maps;
  	size_t map_count;
  	int default_value;
  };
  
  /*
   *	core.eol
   *		Sets the line ending type to use in the working directory for
   *	files that have the text property set. Alternatives are lf, crlf
   *	and native, which uses the platform's native line ending. The default
   *	value is native. See gitattributes(5) for more information on
   *	end-of-line conversion.
   */
  static git_cvar_map _cvar_map_eol[] = {
  	{GIT_CVAR_FALSE, NULL, GIT_EOL_UNSET},
  	{GIT_CVAR_STRING, "lf", GIT_EOL_LF},
  	{GIT_CVAR_STRING, "crlf", GIT_EOL_CRLF},
  	{GIT_CVAR_STRING, "native", GIT_EOL_NATIVE}
  };
  
  /*
   *	core.autocrlf
   *		Setting this variable to "true" is almost the same as setting
   *	the text attribute to "auto" on all files except that text files are
   *	not guaranteed to be normalized: files that contain CRLF in the
   *	repository will not be touched. Use this setting if you want to have
   *	CRLF line endings in your working directory even though the repository
   *	does not have normalized line endings. This variable can be set to input,
   *	in which case no output conversion is performed.
   */
  static git_cvar_map _cvar_map_autocrlf[] = {
  	{GIT_CVAR_FALSE, NULL, GIT_AUTO_CRLF_FALSE},
  	{GIT_CVAR_TRUE, NULL, GIT_AUTO_CRLF_TRUE},
  	{GIT_CVAR_STRING, "input", GIT_AUTO_CRLF_INPUT}
  };
  
  /*
   * Generic map for integer values
   */
  static git_cvar_map _cvar_map_int[] = {
  	{GIT_CVAR_INT32, NULL, 0},
  };
  
  static struct map_data _cvar_maps[] = {
  	{"core.autocrlf", _cvar_map_autocrlf, ARRAY_SIZE(_cvar_map_autocrlf), GIT_AUTO_CRLF_DEFAULT},
  	{"core.eol", _cvar_map_eol, ARRAY_SIZE(_cvar_map_eol), GIT_EOL_DEFAULT},
  	{"core.symlinks", NULL, 0, GIT_SYMLINKS_DEFAULT },
  	{"core.ignorecase", NULL, 0, GIT_IGNORECASE_DEFAULT },
  	{"core.filemode", NULL, 0, GIT_FILEMODE_DEFAULT },
  	{"core.ignorestat", NULL, 0, GIT_IGNORESTAT_DEFAULT },
  	{"core.trustctime", NULL, 0, GIT_TRUSTCTIME_DEFAULT },
  	{"core.abbrev", _cvar_map_int, 1, GIT_ABBREV_DEFAULT },
  	{"core.precomposeunicode", NULL, 0, GIT_PRECOMPOSE_DEFAULT },
  };
  
  int git_repository__cvar(int *out, git_repository *repo, git_cvar_cached cvar)
  {
  	*out = repo->cvar_cache[(int)cvar];
  
  	if (*out == GIT_CVAR_NOT_CACHED) {
  		struct map_data *data = &_cvar_maps[(int)cvar];
  		git_config *config;
  		int error;
  		const git_config_entry *entry;
  
  		if ((error = git_repository_config__weakptr(&config, repo)) < 0)
  			return error;
  
  		git_config__lookup_entry(&entry, config, data->cvar_name, false);
  
  		if (!entry)
  			*out = data->default_value;
  		else if (data->maps)
  			error = git_config_lookup_map_value(
  				out, data->maps, data->map_count, entry->value);
  		else
  			error = git_config_parse_bool(out, entry->value);
  
  		if (error < 0)
  			return error;
  
  		repo->cvar_cache[(int)cvar] = *out;
  	}
  
  	return 0;
  }
  
  void git_repository__cvar_cache_clear(git_repository *repo)
  {
  	int i;
  
  	for (i = 0; i < GIT_CVAR_CACHE_MAX; ++i)
  		repo->cvar_cache[i] = GIT_CVAR_NOT_CACHED;
  }
  
  

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