thodg/libgit2/include/git2/config.h

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• Hash : 80a665aa
  Author :
  Date : 2011-12-16T02:28:39
  

  config: really delete variables Instead of just setting the value to NULL, which gives unwanted results when asking for that variable after deleting it, delete the variable from the list and re-write the file.

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• include/git2/config.h

• /*
   * Copyright (C) 2009-2011 the libgit2 contributors
   *
   * 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_config_h__
  #define INCLUDE_git_config_h__
  
  #include "common.h"
  #include "types.h"
  
  /**
   * @file git2/config.h
   * @brief Git config management routines
   * @defgroup git_config Git config management routines
   * @ingroup Git
   * @{
   */
  GIT_BEGIN_DECL
  
  /**
   * Generic backend that implements the interface to
   * access a configuration file
   */
  struct git_config_file {
  	struct git_config *cfg;
  
  	/* Open means open the file/database and parse if necessary */
  	int (*open)(struct git_config_file *);
  	int (*get)(struct git_config_file *, const char *key, const char **value);
  	int (*set)(struct git_config_file *, const char *key, const char *value);
  	int (*delete)(struct git_config_file *, const char *key);
  	int (*foreach)(struct git_config_file *, int (*fn)(const char *, const char *, void *), void *data);
  	void (*free)(struct git_config_file *);
  };
  
  /**
   * Locate the path to the global configuration file
   *
   * The user or global configuration file is usually
   * located in `$HOME/.gitconfig`.
   *
   * This method will try to guess the full path to that
   * file, if the file exists. The returned path
   * may be used on any `git_config` call to load the
   * global configuration file.
   *
   * @param global_config_path Buffer of GIT_PATH_MAX length to store the path
   * @return GIT_SUCCESS if a global configuration file has been
   *	found. Its path will be stored in `buffer`.
   */
  GIT_EXTERN(int) git_config_find_global(char *global_config_path);
  
  /**
   * Locate the path to the system configuration file
   *
   * If /etc/gitconfig doesn't exist, it will look for
   * %PROGRAMFILES%\Git\etc\gitconfig.
  
   * @param system_config_path Buffer of GIT_PATH_MAX length to store the path
   * @return GIT_SUCCESS if a system configuration file has been
   *	found. Its path will be stored in `buffer`.
   */
  GIT_EXTERN(int) git_config_find_system(char *system_config_path);
  
  /**
   * Open the global configuration file
   *
   * Utility wrapper that calls `git_config_find_global`
   * and opens the located file, if it exists.
   *
   * @param out Pointer to store the config instance
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_open_global(git_config **out);
  
  /**
   * Create a configuration file backend for ondisk files
   *
   * These are the normal `.gitconfig` files that Core Git
   * processes. Note that you first have to add this file to a
   * configuration object before you can query it for configuration
   * variables.
   *
   * @param out the new backend
   * @param path where the config file is located
   */
  GIT_EXTERN(int) git_config_file__ondisk(struct git_config_file **out, const char *path);
  
  /**
   * Allocate a new configuration object
   *
   * This object is empty, so you have to add a file to it before you
   * can do anything with it.
   *
   * @param out pointer to the new configuration
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_new(git_config **out);
  
  /**
   * Add a generic config file instance to an existing config
   *
   * Note that the configuration object will free the file
   * automatically.
   *
   * Further queries on this config object will access each
   * of the config file instances in order (instances with
   * a higher priority will be accessed first).
   *
   * @param cfg the configuration to add the file to
   * @param file the configuration file (backend) to add
   * @param priority the priority the backend should have
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_add_file(git_config *cfg, git_config_file *file, int priority);
  
  /**
   * Add an on-disk config file instance to an existing config
   *
   * The on-disk file pointed at by `path` will be opened and
   * parsed; it's expected to be a native Git config file following
   * the default Git config syntax (see man git-config).
   *
   * Note that the configuration object will free the file
   * automatically.
   *
   * Further queries on this config object will access each
   * of the config file instances in order (instances with
   * a higher priority will be accessed first).
   *
   * @param cfg the configuration to add the file to
   * @param path path to the configuration file (backend) to add
   * @param priority the priority the backend should have
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_add_file_ondisk(git_config *cfg, const char *path, int priority);
  
  
  /**
   * Create a new config instance containing a single on-disk file
   *
   * This method is a simple utility wrapper for the following sequence
   * of calls:
   *	- git_config_new
   *	- git_config_add_file_ondisk
   *
   * @param cfg The configuration instance to create
   * @param path Path to the on-disk file to open
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_open_ondisk(git_config **cfg, const char *path);
  
  /**
   * Free the configuration and its associated memory and files
   *
   * @param cfg the configuration to free
   */
  GIT_EXTERN(void) git_config_free(git_config *cfg);
  
  /**
   * Get the value of an integer config variable.
   *
   * @param cfg where to look for the variable
   * @param name the variable's name
   * @param out pointer to the variable where the value should be stored
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_get_int32(git_config *cfg, const char *name, int32_t *out);
  
  /**
   * Get the value of a long integer config variable.
   *
   * @param cfg where to look for the variable
   * @param name the variable's name
   * @param out pointer to the variable where the value should be stored
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_get_int64(git_config *cfg, const char *name, int64_t *out);
  
  /**
   * Get the value of a boolean config variable.
   *
   * This function uses the usual C convention of 0 being false and
   * anything else true.
   *
   * @param cfg where to look for the variable
   * @param name the variable's name
   * @param out pointer to the variable where the value should be stored
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_get_bool(git_config *cfg, const char *name, int *out);
  
  /**
   * Get the value of a string config variable.
   *
   * The string is owned by the variable and should not be freed by the
   * user.
   *
   * @param cfg where to look for the variable
   * @param name the variable's name
   * @param out pointer to the variable's value
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_get_string(git_config *cfg, const char *name, const char **out);
  
  /**
   * Set the value of an integer config variable.
   *
   * @param cfg where to look for the variable
   * @param name the variable's name
   * @param value Integer value for the variable
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_set_int32(git_config *cfg, const char *name, int32_t value);
  
  /**
   * Set the value of a long integer config variable.
   *
   * @param cfg where to look for the variable
   * @param name the variable's name
   * @param value Long integer value for the variable
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_set_int64(git_config *cfg, const char *name, int64_t value);
  
  /**
   * Set the value of a boolean config variable.
   *
   * @param cfg where to look for the variable
   * @param name the variable's name
   * @param value the value to store
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_set_bool(git_config *cfg, const char *name, int value);
  
  /**
   * Set the value of a string config variable.
   *
   * A copy of the string is made and the user is free to use it
   * afterwards.
   *
   * @param cfg where to look for the variable
   * @param name the variable's name
   * @param value the string to store.
   * @return GIT_SUCCESS or an error code
   */
  GIT_EXTERN(int) git_config_set_string(git_config *cfg, const char *name, const char *value);
  
  /**
   * Delete a config variable
   *
   * @param cfg the configuration
   * @param name the variable to delete
   */
  GIT_EXTERN(int) git_config_delete(git_config *cfg, const char *name);
  
  /**
   * Perform an operation on each config variable.
   *
   * The callback receives the normalized name and value of each variable
   * in the config backend, and the data pointer passed to this function.
   * As soon as one of the callback functions returns something other than 0,
   * this function returns that value.
   *
   * @param cfg where to get the variables from
   * @param callback the function to call on each variable
   * @param payload the data to pass to the callback
   * @return GIT_SUCCESS or the return value of the callback which didn't return 0
   */
  GIT_EXTERN(int) git_config_foreach(
  	git_config *cfg,
  	int (*callback)(const char *var_name, const char *value, void *payload),
  	void *payload);
  
  /** @} */
  GIT_END_DECL
  #endif
  

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