svn_wc.h

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/**
 * @copyright
 * ====================================================================
 * Copyright (c) 2000-2008 CollabNet.  All rights reserved.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution.  The terms
 * are also available at http://subversion.tigris.org/license-1.html.
 * If newer versions of this license are posted there, you may use a
 * newer version instead, at your option.
 *
 * This software consists of voluntary contributions made by many
 * individuals.  For exact contribution history, see the revision
 * history and logs, available at http://subversion.tigris.org/.
 * ====================================================================
 * @endcopyright
 *
 * @file svn_wc.h
 * @brief Subversion's working copy library
 *
 * Requires:
 *            - A working copy
 *
 * Provides:
 *            - Ability to manipulate working copy's versioned data.
 *            - Ability to manipulate working copy's administrative files.
 *
 * Used By:
 *            - Clients.
 *
 * Notes:
 *            The 'path' parameters to most of these functions can be
 *            absolute or relative (relative to current working
 *            directory).  If there are any cases where they are
 *            relative to the path associated with the
 *            'svn_wc_adm_access_t *adm_access' baton passed along
 *            with the path, those cases should be explicitly
 *            documented, and if they are not, please fix it.
 */

#ifndef SVN_WC_H
#define SVN_WC_H


#include <apr.h>
#include <apr_pools.h>
#include <apr_tables.h>
#include <apr_hash.h>

#include "svn_types.h"
#include "svn_string.h"
#include "svn_delta.h"
#include "svn_error.h"
#include "svn_opt.h"
#include "svn_ra.h"    /* for svn_ra_reporter_t type */

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */


/**
 * Get libsvn_wc version information.
 *
 * @since New in 1.1.
 */
const svn_version_t *svn_wc_version(void);

/**
 * @defgroup svn_wc  Working copy management
 * @{
 */

/** Flags for use with svn_wc_translated_file2
 *
 * @defgroup translate_flags Translation flags
 *
 * @{
 */

  /** Translate from Normal Form.
   *
   * The working copy text bases and repository files are stored
   * in normal form.  Some files' contents - or ever representation -
   * differs between the working copy and the normal form.  This flag
   * specifies to take the latter form as input and transform it
   * to the former.
   *
   * Either this flag or @c SVN_WC_TRANSLATE_TO_NF should be specified,
   * but not both.
   */
#define SVN_WC_TRANSLATE_FROM_NF                 0x00000000

  /** Translate to Normal Form.
   *
   * Either this flag or @c SVN_WC_TRANSLATE_FROM_NF should be specified,
   * but not both.
   */
#define SVN_WC_TRANSLATE_TO_NF                   0x00000001

  /** Force repair of eol styles, making sure the output file consistently
   * contains the one eol style as specified by the svn:eol-style
   * property and the required translation direction.
   *
   */
#define SVN_WC_TRANSLATE_FORCE_EOL_REPAIR        0x00000002

  /** Don't register a pool cleanup to delete the output file */
#define SVN_WC_TRANSLATE_NO_OUTPUT_CLEANUP       0x00000004

  /** Guarantee a new file is created on successful return.
   * The default shortcuts translation by returning the path
   * of the untranslated file when no translation is required.
   */
#define SVN_WC_TRANSLATE_FORCE_COPY              0x00000008

  /** Use a non-wc-local tmp directory for creating output files,
   * instead of in the working copy admin tmp area which is the default.
   *
   * @since New in 1.4.
   */
#define SVN_WC_TRANSLATE_USE_GLOBAL_TMP          0x00000010

/** @} */


/* Locking/Opening/Closing */

/** Baton for access to a working copy administrative area.
 *
 * One day all such access will require a baton, we're not there yet.
 *
 * Access batons can be grouped into sets, by passing an existing open
 * baton when opening a new baton.  Given one baton in a set, other batons
 * may be retrieved.  This allows an entire hierarchy to be locked, and
 * then the set of batons can be passed around by passing a single baton.
 */
typedef struct svn_wc_adm_access_t svn_wc_adm_access_t;


/**
 * Return, in @a *adm_access, a pointer to a new access baton for the working
 * copy administrative area associated with the directory @a path.  If
 * @a write_lock is TRUE the baton will include a write lock, otherwise the
 * baton can only be used for read access.  If @a path refers to a directory
 * that is already write locked then the error @c SVN_ERR_WC_LOCKED will be
 * returned.  The error @c SVN_ERR_WC_NOT_DIRECTORY will be returned if
 * @a path is not a versioned directory.
 *
 * If @a associated is an open access baton then @a adm_access will be added
 * to the set containing @a associated.  @a associated can be @c NULL, in
 * which case @a adm_access is the start of a new set.
 *
 * @a levels_to_lock specifies how far to lock.  Zero means just the specified
 * directory.  Any negative value means to lock the entire working copy
 * directory hierarchy under @a path.  A positive value indicates the number of
 * levels of directories to lock -- 1 means just immediate subdirectories, 2
 * means immediate subdirectories and their subdirectories, etc.  All the
 * access batons will become part of the set containing @a adm_access.  This
 * is an all-or-nothing option, if it is not possible to lock all the
 * requested directories then an error will be returned and @a adm_access will
 * be invalid, with the exception that subdirectories of @a path that are
 * missing from the physical filesystem will not be locked and will not cause
 * an error.  The error @c SVN_ERR_WC_LOCKED will be returned if a
 * subdirectory of @a path is already write locked.
 *
 * If @a cancel_func is non-NULL, call it with @a cancel_baton to determine
 * if the client has cancelled the operation.
 *
 * @a pool will be used to allocate memory for the baton and any subsequently
 * cached items.  If @a adm_access has not been closed when the pool is
 * cleared, it will be closed automatically at that point, and removed from
 * its set.  A baton closed in this way will not remove physical locks from
 * the working copy if cleanup is required.
 *
 * The first baton in a set, with @a associated passed as @c NULL, must have
 * the longest lifetime of all the batons in the set.  This implies it must be
 * the root of the hierarchy.
 *
 * @since New in 1.2.
 */
svn_error_t *
svn_wc_adm_open3(svn_wc_adm_access_t **adm_access,
                 svn_wc_adm_access_t *associated,
                 const char *path,
                 svn_boolean_t write_lock,
                 int levels_to_lock,
                 svn_cancel_func_t cancel_func,
                 void *cancel_baton,
                 apr_pool_t *pool);

/**
 * Similar to svn_wc_adm_open3(), but without cancellation support.
 *
 * @deprecated Provided for backward compatibility with the 1.1 API.
 */
SVN_DEPRECATED
svn_error_t *
svn_wc_adm_open2(svn_wc_adm_access_t **adm_access,
                 svn_wc_adm_access_t *associated,
                 const char *path,
                 svn_boolean_t write_lock,
                 int levels_to_lock,
                 apr_pool_t *pool);

/**
 * Similar to svn_wc_adm_open2(), but with @a tree_lock instead of
 * @a levels_to_lock.  @a levels_to_lock is set to -1 if @a tree_lock
 * is @c TRUE, else 0.
 *
 * @deprecated Provided for backward compatibility with the 1.0 API.
 */
SVN_DEPRECATED
svn_error_t *
svn_wc_adm_open(svn_wc_adm_access_t **adm_access,
                svn_wc_adm_access_t *associated,
                const char *path,
                svn_boolean_t write_lock,
                svn_boolean_t tree_lock,
                apr_pool_t *pool);

/**
 * Checks the working copy to determine the node type of @a path.  If
 * @a path is a versioned directory then the behaviour is like that of
 * svn_wc_adm_open3(), otherwise, if @a path is a file or does not
 * exist, then the behaviour is like that of svn_wc_adm_open3() with
 * @a path replaced by the parent directory of @a path.  If @a path is
 * an unversioned directory, the behaviour is also like that of
 * svn_wc_adm_open3() on the parent, except that if the open fails,
 * then the returned SVN_ERR_WC_NOT_DIRECTORY error refers to @a path,
 * not to @a path's parent.
 *
 * @since New in 1.2.
 */
svn_error_t *
svn_wc_adm_probe_open3(svn_wc_adm_access_t **adm_access,
                       svn_wc_adm_access_t *associated,
                       const char *path,
                       svn_boolean_t write_lock,
                       int levels_to_lock,
                       svn_cancel_func_t cancel_func,
                       void *cancel_baton,
                       apr_pool_t *pool);

/**
 * Similar to svn_wc_adm_probe_open3() without the cancel
 * functionality.
 *
 * @deprecated Provided for backward compatibility with the 1.1 API.
 */
SVN_DEPRECATED
svn_error_t *
svn_wc_adm_probe_open2(svn_wc_adm_access_t **adm_access,
                       svn_wc_adm_access_t *associated,
                       const char *path,
                       svn_boolean_t write_lock,
                       int levels_to_lock,
                       apr_pool_t *pool);

/**
 * Similar to svn_wc_adm_probe_open2(), but with @a tree_lock instead of
 * @a levels_to_lock.  @a levels_to_lock is set to -1 if @a tree_lock
 * is @c TRUE, else 0.
 *
 * @deprecated Provided for backward compatibility with the 1.0 API.
 */
SVN_DEPRECATED
svn_error_t *
svn_wc_adm_probe_open(svn_wc_adm_access_t **adm_access,
                      svn_wc_adm_access_t *associated,
                      const char *path,
                      svn_boolean_t write_lock,
                      svn_boolean_t tree_lock,
                      apr_pool_t *pool);

/**
 * Open access batons for @a path and return in @a *anchor_access and
 * @a *target the anchor and target required to drive an editor.  Return
 * in @a *target_access the access baton for the target, which may be the
 * same as @a *anchor_access (in which case @a *target is the empty
 * string, never NULL).  All the access batons will be in the
 * @a *anchor_access set.
 *
 * @a levels_to_lock determines the levels_to_lock used when opening
 * @a path if @a path is a versioned directory, @a levels_to_lock is
 * ignored otherwise.  If @a write_lock is  @c TRUE the access batons
 * will hold write locks.
 *
 * If @a cancel_func is non-NULL, call it with @a cancel_baton to determine
 * if the client has cancelled the operation.
 *
 * This function is essentially a combination of svn_wc_adm_open3() and
 * svn_wc_get_actual_target(), with the emphasis on reducing physical IO.
 *
 * @since New in 1.2.
 */
svn_error_t *
svn_wc_adm_open_anchor(svn_wc_adm_access_t **anchor_access,
                       svn_wc_adm_access_t **target_access,
                       const char **target,
                       const char *path,
                       svn_boolean_t write_lock,
                       int levels_to_lock,
                       svn_cancel_func_t cancel_func,
                       void *cancel_baton,
                       apr_pool_t *pool);

/** Return, in @a *adm_access, a pointer to an existing access baton associated
 * with @a path.  @a path must be a directory that is locked as part of the
 * set containing the @a associated access baton.
 *
 * If the requested access baton is marked as missing in, or is simply
 * absent from, @a associated, return SVN_ERR_WC_NOT_LOCKED.
 *
 * @a pool is used only for local processing, it is not used for the batons.
 */
svn_error_t *
svn_wc_adm_retrieve(svn_wc_adm_access_t **adm_access,
                    svn_wc_adm_access_t *associated,
                    const char *path,
                    apr_pool_t *pool);

/** Check the working copy to determine the node type of @a path.  If
 * @a path is a versioned directory then the behaviour is like that of
 * svn_wc_adm_retrieve(), otherwise, if @a path is a file, an unversioned
 * directory, or does not exist, then the behaviour is like that of
 * svn_wc_adm_retrieve() with @a path replaced by the parent directory of
 * @a path.
 */
svn_error_t *
svn_wc_adm_probe_retrieve(svn_wc_adm_access_t **adm_access,
                          svn_wc_adm_access_t *associated,
                          const char *path,
                          apr_pool_t *pool);

/**
 * Try various ways to obtain an access baton for @a path.
 *
 * First, try to obtain @a *adm_access via svn_wc_adm_probe_retrieve(),
 * but if this fails because @a associated can't give a baton for
 * @a path or @a path's parent, then try svn_wc_adm_probe_open3(),
 * this time passing @a write_lock and @a levels_to_lock.  If there is
 * still no access because @a path is not a versioned directory, then
 * just set @a *adm_access to NULL and return success.  But if it is
 * because @a path is locked, then return the error @c SVN_ERR_WC_LOCKED,
 * and the effect on @a *adm_access is undefined.  (Or if the attempt
 * fails for any other reason, return the corresponding error, and the
 * effect on @a *adm_access is also undefined.)
 *
 * If svn_wc_adm_probe_open3() succeeds, then add @a *adm_access to
 * @a associated.
 *
 * If @a cancel_func is non-NULL, call it with @a cancel_baton to determine
 * if the client has cancelled the operation.
 *
 * Use @a pool only for local processing, not to allocate @a *adm_access.
 *
 * @since New in 1.2.
 */
svn_error_t *
svn_wc_adm_probe_try3(svn_wc_adm_access_t **adm_access,
                      svn_wc_adm_access_t *associated,
                      const char *path,
                      svn_boolean_t write_lock,
                      int levels_to_lock,
                      svn_cancel_func_t cancel_func,
                      void *cancel_baton,
                      apr_pool_t *pool);

/**
 * Similar to svn_wc_adm_probe_try3() without the cancel
 * functionality.
 *
 * @deprecated Provided for backward compatibility with the 1.1 API.
 */
SVN_DEPRECATED
svn_error_t *
svn_wc_adm_probe_try2(svn_wc_adm_access_t **adm_access,
                      svn_wc_adm_access_t *associated,
                      const char *path,
                      svn_boolean_t write_lock,
                      int levels_to_lock,
                      apr_pool_t *pool);

/**
 * Similar to svn_wc_adm_probe_try2(), but with @a tree_lock instead of
 * @a levels_to_lock.  @a levels_to_lock is set to -1 if @a tree_lock
 * is @c TRUE, else 0.
 *
 * @deprecated Provided for backward compatibility with the 1.0 API.
 */
SVN_DEPRECATED
svn_error_t *
svn_wc_adm_probe_try(svn_wc_adm_access_t **adm_access,
                     svn_wc_adm_access_t *associated,
                     const char *path,
                     svn_boolean_t write_lock,
                     svn_boolean_t tree_lock,
                     apr_pool_t *pool);


/** Give up the access baton @a adm_access, and its lock if any. This will
 * recursively close any batons in the same set that are direct
 * subdirectories of @a adm_access.  Any physical locks will be removed from
 * the working copy.  Lock removal is unconditional, there is no check to
 * determine if cleanup is required.
 */
svn_error_t *svn_wc_adm_close(svn_wc_adm_access_t *adm_access);

/** Return the path used to open the access baton @a adm_access */
const char *svn_wc_adm_access_path(svn_wc_adm_access_t *adm_access);

/** Return the pool used by access baton @a adm_access */
apr_pool_t *svn_wc_adm_access_pool(svn_wc_adm_access_t *adm_access);

/** Return @c TRUE is the access baton @a adm_access has a write lock,
 * @c FALSE otherwise. Compared to svn_wc_locked() this is a cheap, fast
 * function that doesn't access the filesystem.
 */
svn_boolean_t svn_wc_adm_locked(svn_wc_adm_access_t *adm_access);

/** Set @a *locked to non-zero if @a path is locked, else set it to zero. */
svn_error_t *
svn_wc_locked(svn_boolean_t *locked,
              const char *path,
              apr_pool_t *pool);


/**
 * Return @c TRUE if @a name is the name of the WC administrative
 * directory.  Use @a pool for any temporary allocations.  Only works
 * with base directory names, not paths or URIs.
 *
 * For compatibility, the default name (.svn) will always be treated
 * as an admin dir name, even if the working copy is actually using an
 * alternative name.
 *
 * @since New in 1.3.
 */
svn_boolean_t svn_wc_is_adm_dir(const char *name, apr_pool_t *pool);


/**
 * Return the name of the administrative directory.
 * Use @a pool for any temporary allocations.
 *
 * The returned pointer will refer to either a statically allocated
 * string, or to a string allocated in @a pool.
 *
 * @since New in 1.3.
 */
const char *svn_wc_get_adm_dir(apr_pool_t *pool);


/**
 * Use @a name for the administrative directory in the working copy.
 * Use @a pool for any temporary allocations.
 *
 * The list of valid names is limited.  Currently only ".svn" (the
 * default) and "_svn" are allowed.
 *
 * @note This function changes global (per-process) state and must be
 * called in a single-threaded context during the initialization of a
 * Subversion client.
 *
 * @since New in 1.3.
 */
svn_error_t *svn_wc_set_adm_dir(const char *name, apr_pool_t *pool);



/** Traversal information is information gathered by a working copy
 * crawl or update.  For example, the before and after values of the
 * svn:externals property are important after an update, and since
 * we're traversing the working tree anyway (a complete traversal
 * during the initial crawl, and a traversal of changed paths during
 * the checkout/update/switch), it makes sense to gather the
 * property's values then instead of making a second pass.
 */
typedef struct svn_wc_traversal_info_t svn_wc_traversal_info_t;


/** Return a new, empty traversal info object, allocated in @a pool. */
svn_wc_traversal_info_t *svn_wc_init_traversal_info(apr_pool_t *pool);


/** Set @a *externals_old and @a *externals_new to hash tables representing
 * changes to values of the svn:externals property on directories
 * traversed by @a traversal_info.
 *
 * @a traversal_info is obtained from svn_wc_init_traversal_info(), but is
 * only useful after it has been passed through another function, such
 * as svn_wc_crawl_revisions(), svn_wc_get_update_editor(),
 * svn_wc_get_switch_editor(), etc.
 *
 * Each hash maps <tt>const char *</tt> directory names onto
 * <tt>const char *</tt> values of the externals property for that directory.
 * The dir names are full paths -- that is, anchor plus target, not target
 * alone. The values are not parsed, they are simply copied raw, and are
 * never NULL: directories that acquired or lost the property are
 * simply omitted from the appropriate table.  Directories whose value
 * of the property did not change show the same value in each hash.
 *
 * The hashes, keys, and values have the same lifetime as @a traversal_info.
 */
void
svn_wc_edited_externals(apr_hash_t **externals_old,
                        apr_hash_t **externals_new,
                        svn_wc_traversal_info_t *traversal_info);


/** Set @a *depths to a hash table mapping <tt>const char *</tt>
 * directory names (directories traversed by @a traversal_info) to
 * <tt>const char *</tt> values (the depths of those directories, as
 * converted by svn_depth_to_word()).
 *
 * @a traversal_info is obtained from svn_wc_init_traversal_info(), but is
 * only useful after it has been passed through another function, such
 * as svn_wc_crawl_revisions(), svn_wc_get_update_editor(),
 * svn_wc_get_switch_editor(), etc.
 *
 * The dir names are full paths -- that is, anchor plus target, not target
 * alone.  The values are not allocated, they are static constant strings.
 * Although the values are never NULL, not all directories traversed
 * are necessarily listed.  For example, directories which did not
 * have an svn:externals property set or modified are not included.
 *
 * The hashes and keys have the same lifetime as @a traversal_info.
 *
 * @since New in 1.5.
 */
void
svn_wc_traversed_depths(apr_hash_t **depths,
                        svn_wc_traversal_info_t *traversal_info);


/** One external item.  This usually represents one line from an
 * svn:externals description but with the path and URL
 * canonicalized.
 *
 * In order to avoid backwards compatibility problems clients should use
 * svn_wc_external_item_create() to allocate and intialize this structure
 * instead of doing so themselves.
 *
 * @since New in 1.5.
 */
typedef struct svn_wc_external_item2_t
{
  /** The name of the subdirectory into which this external should be
      checked out.  This is relative to the parent directory that
      holds this external item.  (Note that these structs are often
      stored in hash tables with the target dirs as keys, so this
      field will often be redundant.) */
  const char *target_dir;

  /** Where to check out from. */
  const char *url;

  /** What revision to check out.  The only valid kinds for this are
      svn_opt_revision_number, svn_opt_revision_date, and
      svn_opt_revision_head. */
  svn_opt_revision_t revision;

  /** The peg revision to use when checking out.  The only valid kinds are
      svn_opt_revision_number, svn_opt_revision_date, and
      svn_opt_revision_head. */
  svn_opt_revision_t peg_revision;

} svn_wc_external_item2_t;

/**
 * Initialize an external item.
 * Set @a *item to an external item object, allocated in @a pool.
 *
 * In order to avoid backwards compatibility problems, this function
 * is used to intialize and allocate the @c svn_wc_external_item2_t
 * structure rather than doing so explicitly, as the size of this
 * structure may change in the future.
 *
 * The current implementation never returns error, but callers should
 * still check for error, for compatibility with future versions.
 *
 * @since New in 1.5.
 */
svn_error_t *
svn_wc_external_item_create(const svn_wc_external_item2_t **item,
                            apr_pool_t *pool);

/**
 * Return a duplicate of @a item, allocated in @a pool.  No part of the new
 * item will be shared with @a item.
 *
 * @since New in 1.5.
 */
svn_wc_external_item2_t *
svn_wc_external_item2_dup(const svn_wc_external_item2_t *item,
                          apr_pool_t *pool);

/**
 * One external item.  Similar to svn_wc_external_item2_t, except
 * @a revision is interpreted as both the operational revision and the
 * peg revision.
 *
 * @deprecated Provided for backward compatibility with the 1.4 API.
 */
typedef struct svn_wc_external_item_t
{
  /** Same as @c svn_wc_external_item2_t.target_dir */
  const char *target_dir;

  /** Same as @c svn_wc_external_item2_t.url */
  const char *url;

  /** Same as @c svn_wc_external_item2_t.revision */
  svn_opt_revision_t revision;

} svn_wc_external_item_t;

/**
 * Return a duplicate of @a item, allocated in @a pool.  No part of the new
 * item will be shared with @a item.
 *
 * @since New in 1.3.
 *
 * @deprecated Provided for backward compatibility with the 1.4 API.
 */
SVN_DEPRECATED
svn_wc_external_item_t *
svn_wc_external_item_dup(const svn_wc_external_item_t *item,
                         apr_pool_t *pool);

/**
 * If @a externals_p is non-NULL, set @a *externals_p to an array of
 * @c svn_wc_external_item2_t * objects based on @a desc.  The @a url
 * member of the objects will be canonicalized if @a canonicalize_url
 * is @c TRUE.
 *
 * If the format of @a desc is invalid, don't touch @a *externals_p and
 * return @c SVN_ERR_CLIENT_INVALID_EXTERNALS_DESCRIPTION.  Thus, if
 * you just want to check the validity of an externals description,
 * and don't care about the parsed result, pass NULL for @a externals_p.
 *
 * The format of @a desc is the same as for values of the directory
 * property @c SVN_PROP_EXTERNALS, which see.
 *
 * Allocate the table, keys, and values in @a pool.
 *
 * Use @a parent_directory only in constructing error strings.
 *
 * @since New in 1.5.
 */
svn_error_t *
svn_wc_parse_externals_description3(apr_array_header_t **externals_p,
                                    const char *parent_directory,
                                    const char *desc,
                                    svn_boolean_t canonicalize_url,
                                    apr_pool_t *pool);

/**
 * Similar to svn_wc_parse_externals_description3() with @a
 * canonicalize_url set to @c TRUE, but returns an array of @c
 * svn_wc_external_item_t * objects instead of @c
 * svn_wc_external_item2_t * objects
 *
 * @since New in 1.1.
 *
 * @deprecated Provided for backward compatibility with the 1.4 API.
 */
SVN_DEPRECATED
svn_error_t *
svn_wc_parse_externals_description2(apr_array_header_t **externals_p,
                                    const char *parent_directory,
                                    const char *desc,
                                    apr_pool_t *pool);

/**
 * Similar to svn_wc_parse_externals_description2(), but returns the
 * parsed externals in a hash instead of an array.  This function
 * should not be used, as storing the externals in a hash causes their
 * order of evaluation to be not easily identifiable.
 *
 * @deprecated Provided for backward compatibility with the 1.0 API.
 */
SVN_DEPRECATED
svn_error_t *
svn_wc_parse_externals_description(apr_hash_t **externals_p,
                                   const char *parent_directory,
                                   const char *desc,
                                   apr_pool_t *pool);



/* Notification/callback handling. */

/**
 * @defgroup svn_wc_notifications Notification callback handling
 * @{
 *
 * In many cases, the WC library will scan a working copy and make
 * changes. The caller usually wants to know when each of these changes
 * has been made, so that it can display some kind of notification to
 * the user.
 *
 * These notifications have a standard callback function type, which
 * takes the path of the file that was affected, and a caller-
 * supplied baton.
 *
 * Note that the callback is a 'void' return -- this is a simple
 * reporting mechanism, rather than an opportunity for the caller to
 * alter the operation of the WC library.
 *
 * Note also that some of the actions are used across several
 * different Subversion commands.  For example, the update actions are
 * also used for checkouts, switches, and merges.
 */

/** The type of action occurring. */
typedef enum svn_wc_notify_action_t
{
  /** Adding a path to revision control. */
  svn_wc_notify_add = 0,

  /** Copying a versioned path. */
  svn_wc_notify_copy,

  /** Deleting a versioned path. */
  svn_wc_notify_delete,

  /** Restoring a missing path from the pristine text-base. */
  svn_wc_notify_restore,

  /** Reverting a modified path. */
  svn_wc_notify_revert,

  /** A revert operation has failed. */
  svn_wc_notify_failed_revert,

  /** Resolving a conflict. */
  svn_wc_notify_resolved,

  /** Skipping a path. */
  svn_wc_notify_skip,

  /** Got a delete in an update. */
  svn_wc_notify_update_delete,

  /** Got an add in an update. */
  svn_wc_notify_update_add,

  /** Got any other action in an update. */
  svn_wc_notify_update_update,

  /** The last notification in an update (including updates of externals). */
  svn_wc_notify_update_completed,

  /** Updating an external module. */
  svn_wc_notify_update_external,

  /** The last notification in a status (including status on externals). */
  svn_wc_notify_status_completed,

  /** Running status on an external module. */
  svn_wc_notify_status_external,

  /** Committing a modification. */
  svn_wc_notify_commit_modified,

  /** Committing an addition. */
  svn_wc_notify_commit_added,

  /** Committing a deletion. */
  svn_wc_notify_commit_deleted,

  /** Committing a replacement. */
  svn_wc_notify_commit_replaced,

  /** Transmitting post-fix text-delta data for a file. */
  svn_wc_notify_commit_postfix_txdelta,

  /** Processed a single revision's blame. */
  svn_wc_notify_blame_revision,

  /** Locking a path. @since New in 1.2. */
  svn_wc_notify_locked,

  /** Unlocking a path. @since New in 1.2. */
  svn_wc_notify_unlocked,

  /** Failed to lock a path. @since New in 1.2. */
  svn_wc_notify_failed_lock,

  /** Failed to unlock a path. @since New in 1.2. */
  svn_wc_notify_failed_unlock,

  /** Tried adding a path that already exists. @since New in 1.5. */
  svn_wc_notify_exists,

  /** Changelist name set. @since New in 1.5. */
  svn_wc_notify_changelist_set,

  /** Changelist name cleared. @since New in 1.5. */
  svn_wc_notify_changelist_clear,

  /** Warn user that a path has moved from one changelist to another.
      @since New in 1.5. */
  svn_wc_notify_changelist_moved,

  /** A merge operation (to path) has begun.  See @c merge_range in
      @c svn_wc_notify_t. @since New in 1.5. */
  svn_wc_notify_merge_begin,

  /** A merge operation (to path) from a foreign repository has begun.
      See @c merge_range in @c svn_wc_notify_t. @since New in 1.5. */
  svn_wc_notify_foreign_merge_begin,

  /** Replace notification. @since New in 1.5. */
  svn_wc_notify_update_replace,

  /** Property updated. @since New in 1.6. */
  svn_wc_notify_property_updated

} svn_wc_notify_action_t;


/** The type of notification that is occurring. */
typedef enum svn_wc_notify_state_t
{
  svn_wc_notify_state_inapplicable = 0,

  /** Notifier doesn't know or isn't saying. */
  svn_wc_notify_state_unknown,

  /** The state did not change. */
  svn_wc_notify_state_unchanged,

  /** The item wasn't present. */
  svn_wc_notify_state_missing,

  /** An unversioned item obstructed work. */
  svn_wc_notify_state_obstructed,

  /** Pristine state was modified. */
  svn_wc_notify_state_changed,

  /** Modified state had mods merged in. */
  svn_wc_notify_state_merged,

  /** Modified state got conflicting mods. */
  svn_wc_notify_state_conflicted

} svn_wc_notify_state_t;

/**
 * What happened to a lock during an operation.
 *
 * @since New in 1.2.
 */
typedef enum svn_wc_notify_lock_state_t {
  svn_wc_notify_lock_state_inapplicable = 0,
  svn_wc_notify_lock_state_unknown,
  /** The lock wasn't changed. */
  svn_wc_notify_lock_state_unchanged,
  /** The item was locked. */
  svn_wc_notify_lock_state_locked,
  /** The item was unlocked. */
  svn_wc_notify_lock_state_unlocked
} svn_wc_notify_lock_state_t;

/**
 * Structure used in the @c svn_wc_notify_func2_t function.
 *
 * @c kind, @c content_state, @c prop_state and @c lock_state are from
 * after @c action, not before.
 *
 * @note If @c action is @c svn_wc_notify_update, then @c path has
 * already been installed, so it is legitimate for an implementation of
 * @c svn_wc_notify_func2_t to examine @c path in the working copy.
 *
 * @note The purpose of the @c kind, @c mime_type, @c content_state, and
 * @c prop_state fields is to provide "for free" information that an
 * implementation is likely to want, and which it would otherwise be
 * forced to deduce via expensive operations such as reading entries
 * and properties.  However, if the caller does not have this
 * information, it will simply pass the corresponding `*_unknown'
 * values, and it is up to the implementation how to handle that
 * (i.e., whether to attempt deduction, or just to punt and
 * give a less informative notification).
 *
 * @note Callers of notification functions should use svn_wc_create_notify()
 * to create structures of this type to allow for extensibility.
 *
 * @since New in 1.2.
 */
typedef struct svn_wc_notify_t {
  /** Path, either absolute or relative to the current working directory
   * (i.e., not relative to an anchor). */
  const char *path;
  /** Action that describes what happened to @c path. */
  svn_wc_notify_action_t action;
  /** Node kind of @c path. */
  svn_node_kind_t kind;
  /** If non-NULL, indicates the mime-type of @c path.
   * It is always @c NULL for directories. */
  const char *mime_type;
  /** Points to the lock structure received from the repository when
   * @c action is @c svn_wc_notify_locked.  For other actions, it is
   * @c NULL. */
  const svn_lock_t *lock;
  /** Points to an error describing the reason for the failure when @c
   * action is @c svn_wc_notify_failed_lock or @c svn_wc_notify_failed_unlock.
   * Is @c NULL otherwise. */
  svn_error_t *err;
  /** The type of notification that is occurring about node content. */
  svn_wc_notify_state_t content_state;
  /** The type of notification that is occurring about node properties. */
  svn_wc_notify_state_t prop_state;
  /** Reflects the addition or removal of a lock token in the working copy. */
  svn_wc_notify_lock_state_t lock_state;
  /** When @c action is @c svn_wc_notify_update_completed, target revision
   * of the update, or @c SVN_INVALID_REVNUM if not available; when @c
   * action is @c svn_wc_notify_blame_revision, processed revision.
   * In all other cases, it is @c SVN_INVALID_REVNUM. */
  svn_revnum_t revision;
  /** When @c action is @c svn_wc_notify_changelist_add or name.  In all other
   * cases, it is @c NULL.  @since New in 1.5 */
  const char *changelist_name;
  /** When @c action is @c svn_wc_notify_merge_begin, and both the
   * left and right sides of the merge are from the same URL.  In all
   * other cases, it is @c NULL.  @since New in 1.5 */
  svn_merge_range_t *merge_range;
  /** If non-NULL, specifies an absolute path prefix that can be subtracted
   * from the start of the absolute path in @c path.  Its purpose is to
   * allow notification to remove a common prefix from all the paths
   * displayed for an operation.  @since New in 1.6 */
  const char *path_prefix;
  /* NOTE: Add new fields at the end to preserve binary compatibility.
     Also, if you add fields here, you have to update svn_wc_create_notify
     and svn_wc_dup_notify. */
} svn_wc_notify_t;

/**
 * Allocate an @c svn_wc_notify_t structure in @a pool, initialize and return
 * it.
 *
 * Set the @c path field of the created struct to @a path, and @c action to
 * @a action.  Set all other fields to their @c _unknown, @c NULL or
 * invalid value, respectively. Make only a shallow copy of the pointer
 * @a path.
 *
 * @since New in 1.2.
 */
svn_wc_notify_t *
svn_wc_create_notify(const char *path,
                     svn_wc_notify_action_t action,
                     apr_pool_t *pool);

/**
 * Return a deep copy of @a notify, allocated in @a pool.
 *
 * @since New in 1.2.
 */
svn_wc_notify_t *
svn_wc_dup_notify(const svn_wc_notify_t *notify,
                  apr_pool_t *pool);

/**
 * Notify the world that @a notify->action has happened to @a notify->path.
 *
 * Recommendation: callers of @c svn_wc_notify_func2_t should avoid
 * invoking it multiple times on the same path within a given
 * operation, and implementations should not bother checking for such
 * duplicate calls.  For example, in an update, the caller should not
 * invoke the notify func on receiving a prop change and then again
 * on receiving a text change.  Instead, wait until all changes have
 * been received, and then invoke the notify func once (from within
 * an @c svn_delta_editor_t's close_file(), for example), passing
 * the appropriate @a notify->content_state and @a notify->prop_state flags.
 *
 * @since New in 1.2.
 */
typedef void (*svn_wc_notify_func2_t)(void *baton,
                                      const svn_wc_notify_t *notify,
                                      apr_pool_t *pool);

/**
 * Similar to @c svn_wc_notify_func2_t, but takes the information as arguments
 * instead of struct fields.
 *
 * @deprecated Provided for backward compatibility with the 1.1 API.
 */
typedef void (*svn_wc_notify_func_t)(void *baton,
                                     const char *path,
                                     svn_wc_notify_action_t action,
                                     svn_node_kind_t kind,
                                     const char *mime_type,
                                     svn_wc_notify_state_t content_state,
                                     svn_wc_notify_state_t prop_state,
                                     svn_revnum_t revision);

/** @} */


/**
 * A simple callback type to wrap svn_ra_get_file();  see that
 * docstring for more information.
 *
 * This technique allows libsvn_client to 'wrap' svn_ra_get_file() and
 * pass it down into libsvn_wc functions, thus allowing the WC layer
 * to legally call the RA function via (blind) callback.
 *
 * @since New in 1.5
 */
typedef svn_error_t *(*svn_wc_get_file_t)(void *baton,
                                          const char *path,
                                          svn_revnum_t revision,
                                          svn_stream_t *stream,
                                          svn_revnum_t *fetched_rev,
                                          apr_hash_t **props,
                                          apr_pool_t *pool);


/**
 * Interactive conflict handling
 *
 * @defgroup svn_wc_conflict Conflict callback functionality
 *
 * @{
 *
 * This API gives a Subversion client application the opportunity to
 * define a callback that allows the user to resolve conflicts
 * interactively during updates and merges.
 *
 * If a conflict is discovered, libsvn_wc invokes the callback with an
 * @c svn_wc_conflict_description_t.  This structure describes the
 * path in conflict, whether it's a text or property conflict, and may
 * also present up to three files that can be used to resolve the
 * conflict (perhaps by launching an editor or 3rd-party merging
 * tool).  The structure also provides a possible fourth file (@c
 * merged_file) which, if not NULL, represents libsvn_wc's attempt to
 * contextually merge the first three files.  (Note that libsvn_wc
 * will not attempt to merge a file that it believes is binary, and it
 * will only attempt to merge property values it believes to be a
 * series of multi-line text.)
 *
 * When the callback is finished interacting with the user, it
 * responds by returning a @c svn_wc_conflict_result_t.  This
 * structure indicates whether the user wants to postpone the conflict
 * for later (allowing libsvn_wc to mark the path "conflicted" as
 * usual), or whether the user wants libsvn_wc to use one of the four
 * files as the "final" state for resolving the conflict immediately.
 *
 * Note that the callback is at liberty (and encouraged) to merge the
 * three files itself.  If it does so, it signals this to libsvn_wc by
 * returning a choice of @c svn_wc_conflict_choose_merged.  To return
 * the 'final' merged file to libsvn_wc, the callback has the option of
 * either:
 *
 *    - editing the original @c merged_file in-place
 *
 *        or, if libsvn_wc never supplied a merged_file in the
 *        description structure (i.e. passed NULL for that field),
 *
 *    - return the merged file in the @c svn_wc_conflict_result_t.
 *
 */

/** The type of action being attempted on an object.
 *
 * @since New in 1.5.
 */
typedef enum svn_wc_conflict_action_t
{
  svn_wc_conflict_action_edit,    /* attempting to change text or props */
  svn_wc_conflict_action_add,     /* attempting to add object */
  svn_wc_conflict_action_delete   /* attempting to delete object */

} svn_wc_conflict_action_t;


/** The pre-existing condition which is causing a state of conflict.
 *
 * @since New in 1.5.
 */
typedef enum svn_wc_conflict_reason_t
{
  svn_wc_conflict_reason_edited,     /* local edits are already present */
  svn_wc_conflict_reason_obstructed, /* another object is in the way */
  svn_wc_conflict_reason_deleted,    /* object is already schedule-delete */
  svn_wc_conflict_reason_added,      /* object is already added or schedule-add */
  svn_wc_conflict_reason_missing,    /* object is unknown or missing */
  svn_wc_conflict_reason_unversioned /* object is unversioned */

} svn_wc_conflict_reason_t;


/** The type of conflict being described by an @c
 * svn_wc_conflict_description_t (see below).
 *
 * @since New in 1.5.
 */
typedef enum svn_wc_conflict_kind_t
{
  svn_wc_conflict_kind_text,         /* textual conflict (on a file) */
  svn_wc_conflict_kind_property,     /* property conflict (on a file or dir) */
  svn_wc_conflict_kind_tree          /* tree conflict (on a dir) */

} svn_wc_conflict_kind_t;


/** The user operation that exposed a conflict.
 *
 * @since New in 1.6.
 */
typedef enum svn_wc_operation_t
{
  svn_wc_operation_update,
  svn_wc_operation_switch,
  svn_wc_operation_merge,

} svn_wc_operation_t;


/** A struct that describes a conflict that has occurred in the
 * working copy.  Passed to @c svn_wc_conflict_resolver_func_t.
 *
 * The conflict described by this structure is one of:
 *   - a conflict on the content of the file node @a path
 *   - a conflict on the property @a property_name of @a path
 *
 * @note Fields may be added to the end of this structure in future
 * versions.  Therefore, to preserve binary compatibility, users
 * should not directly allocate structures of this type but should use
 * svn_wc_create_conflict_description_text() or
 * svn_wc_create_conflict_description_prop() or
 * svn_wc_create_conflict_description_tree() instead.
 *
 * @since New in 1.5.
 */
typedef struct svn_wc_conflict_description_t
{
  /** The path that is in conflict (for a tree conflict, it is the victim) */
  const char *path;

  /** The node type of the path being operated on */
  svn_node_kind_t node_kind;

  /** What sort of conflict are we describing? */
  svn_wc_conflict_kind_t kind;

  /** The name of the property whose conflict is being described.
   *  (Only if @a kind is 'property'; else undefined.) */
  const char *property_name;

  /** Whether svn thinks ('my' version of) @c path is a 'binary' file.
   *  (Only if @c kind is 'text', else undefined.) */
  svn_boolean_t is_binary;

  /** The svn:mime-type property of ('my' version of) @c path, if available,
   *  else NULL.
   *  (Only if @c kind is 'text', else undefined.) */
  const char *mime_type;

  /** If not NULL, an open working copy access baton to either the
   *  path itself (if @c path is a directory), or to the parent
   *  directory (if @c path is a file.) */
  svn_wc_adm_access_t *access;

  /** The action being attempted on the conflicted node or property.
   *  (When @c kind is 'text', this action must be 'edit'.) */
  svn_wc_conflict_action_t action;

  /** The state of the target node or property, relative to its merge-left
   *  source, that is the reason for the conflict.
   *  (When @c kind is 'text', this reason must be 'edited'.) */
  svn_wc_conflict_reason_t reason;

  /** If this is text-conflict and involves the merging of two files
   * descended from a common ancestor, here are the paths of up to
   * four fulltext files that can be used to interactively resolve the
   * conflict.  All four files will be in repository-normal form -- LF
   * line endings and contracted keywords.  (If any of these files are
   * not available, they default to NULL.)
   *
   * On the other hand, if this is a property-conflict, then these
   * paths represent temporary files that contain the three different
   * property-values in conflict.  The fourth path (@c merged_file)
   * may or may not be NULL;  if set, it represents libsvn_wc's
   * attempt to merge the property values together.  (Remember that
   * property values are technically binary values, and thus can't
   * always be merged.)
   */
  const char *base_file;     /* common ancestor of the two files being merged */

  /** their version of the file */
  const char *their_file;

  /** my locally-edited version of the file */
  const char *my_file;

  /** merged version; may contain conflict markers */
  const char *merged_file;

  /** The operation that exposed the conflict.
   * Used only for tree conflicts.
   *
   * @since New in 1.6.
   */
  svn_wc_operation_t operation;

} svn_wc_conflict_description_t;

/**
 * Allocate an @c svn_wc_conflict_description_t structure in @a pool,
 * initialize to represent a text conflict, and return it.
 *
 * Set the @c path field of the created struct to @a path, the @c access
 * field to @a adm_access, the @c kind field to @c
 * svn_wc_conflict_kind_text, the @c node_kind to @c svn_node_file, the @c
 * action to @c svn_wc_conflict_action_edit, and the @c reason to @c
 * svn_wc_conflict_reason_edited. Make only shallow copies of the pointer
 * arguments.
 *
 * @note: It is the caller's responsibility to set the other required fields
 * (such as the four file names and @c mime_type and @c is_binary).
 *
 * @since New in 1.6.
 */
svn_wc_conflict_description_t *
svn_wc_conflict_description_create_text(const char *path,
                                        svn_wc_adm_access_t *adm_access,
                                        apr_pool_t *pool);

/**
 * Allocate an @c svn_wc_conflict_description_t structure in @a pool,
 * initialize to represent a property conflict, and return it.
 *
 * Set the @c path field of the created struct to @a path, the @c access
 * field to @a adm_access, the @c kind field to @c
 * svn_wc_conflict_kind_prop, the @c node_kind to @a node_kind, and the @c
 * property_name to @a property_name. Make only shallow copies of the pointer
 * arguments.
 *
 * @note: It is the caller's responsibility to set the other required fields
 * (such as the four file names and @c action and @c reason).
 *
 * @since New in 1.6.
 */
svn_wc_conflict_description_t *
svn_wc_conflict_description_create_prop(const char *path,
                                        svn_wc_adm_access_t *adm_access,
                                        svn_node_kind_t node_kind,
                                        const char *property_name,
                                        apr_pool_t *pool);

/**
 * Allocate an @c svn_wc_conflict_description_t structure in @a pool,
 * initialize to represent a tree conflict, and return it.
 *
 * Set the @c path field of the created struct to @a path, the @c access
 * field to @a adm_access, the @c kind field to @c
 * svn_wc_conflict_kind_tree, the @c node_kind to @a node_kind, and the @c
 * operation to @a operation. Make only shallow copies of the pointer
 * arguments.
 *
 * @note: It is the caller's responsibility to set the other required fields
 * (such as the four file names and @c action and @c reason).
 *
 * @since New in 1.6.
 */
svn_wc_conflict_description_t *
svn_wc_conflict_description_create_tree(const char *path,
                                        svn_wc_adm_access_t *adm_access,
                                        svn_node_kind_t node_kind,
                                        svn_wc_operation_t operation,
                                        apr_pool_t *pool);


/** The way in which the conflict callback chooses a course of action.
 *
 * @since New in 1.5.
 */
typedef enum svn_wc_conflict_choice_t
{
  /* Don't resolve the conflict now.  Let libsvn_wc mark the path
     'conflicted', so user can run 'svn resolved' later. */
  svn_wc_conflict_choose_postpone,

  /* If their were files to choose from, select one as a way of
     resolving the conflict here and now.  libsvn_wc will then do the
     work of "installing" the chosen file.
  */
  svn_wc_conflict_choose_base,            /* original version */
  svn_wc_conflict_choose_theirs_full,     /* incoming version */
  svn_wc_conflict_choose_mine_full,       /* own version */
  svn_wc_conflict_choose_theirs_conflict, /* incoming (for conflicted hunks) */
  svn_wc_conflict_choose_mine_conflict,   /* own (for conflicted hunks) */
  svn_wc_conflict_choose_merged           /* merged version */

} svn_wc_conflict_choice_t;


/** The final result returned by @c svn_wc_conflict_resolver_func_t.
 *
 * @note Fields may be added to the end of this structure in future
 * versions.  Therefore, to preserve binary compatibility, users
 * should not directly allocate structures of this type.  Instead,
 * construct this structure using @c svn_wc_create_conflict_result()
 * below.
 *
 * @since New in 1.5.
 */
typedef struct svn_wc_conflict_result_t
{
  /** A choice to either delay the conflict resolution or select a
      particular file to resolve the conflict. */
  svn_wc_conflict_choice_t choice;

  /** If not NULL, this is a path to a file which contains the client's
      (or more likely, the user's) merging of the three values in
      conflict.  libsvn_wc accepts this file if (and only if) @c choice
      is set to @c svn_wc_conflict_choose_merged.*/
  const char *merged_file;

  /** If true, save a backup copy of merged_file (or the original
      merged_file from the conflict description, if merged_file is
      NULL) in the user's working copy. */
  svn_boolean_t save_merged;

} svn_wc_conflict_result_t;


/**
 * Allocate an @c svn_wc_conflict_result_t structure in @a pool,
 * initialize and return it.
 *
 * Set the @c choice field of the structure to @a choice, and @c
 * merged_file to @a merged_file.  Set all other fields to their @c
 * _unknown, @c NULL or invalid value, respectively. Make only a shallow
 * copy of the pointer argument @a merged_file.
 *
 * @since New in 1.5.
 */
svn_wc_conflict_result_t *
svn_wc_create_conflict_result(svn_wc_conflict_choice_t choice,
                              const char *merged_file,
                              apr_pool_t *pool);


/** A callback used in svn_client_merge3(), svn_client_update3(), and
 * svn_client_switch2() for resolving conflicts during the application
 * of a tree delta to a working copy.
 *
 * @a description describes the exact nature of the conflict, and
 * provides information to help resolve it.  @a baton is a closure
 * object; it should be provided by the implementation, and passed by
 * the caller.  All allocations should be performed in @a pool.  When
 * finished, the callback signals its resolution by returning a
 * structure in @a *result.  (See @c svn_wc_conflict_result_t.)
 *
 * The values @c svn_wc_conflict_choose_mine_conflict and @c
 * svn_wc_conflict_choose_theirs_conflict are not legal for conflicts
 * in binary files or properties.
 *
 * Implementations of this callback are free to present the conflict
 * using any user interface.  This may include simple contextual
 * conflicts in a file's text or properties, or more complex
 * 'tree'-based conflcts related to obstructed additions, deletions,
 * and edits.  The callback implementation is free to decide which
 * sorts of conflicts to handle; it's also free to decide which types
 * of conflicts are automatically resolvable and which require user
 * interaction.
 *
 * @since New in 1.5.
 */
typedef svn_error_t *(*svn_wc_conflict_resolver_func_t)
    (svn_wc_conflict_result_t **result,
     const svn_wc_conflict_description_t *description,
     void *baton,
     apr_pool_t *pool);

/** @} */



/**
 * A callback vtable invoked by our diff-editors, as they receive
 * diffs from the server.  'svn diff' and 'svn merge' both implement
 * their own versions of this table.
 *
 * Common parameters:
 *
 * @a adm_access will be an access baton for the directory containing
 * @a path, or @c NULL if the diff editor is not using access batons.
 *
 * If @a state is non-NULL, set @a *state to the state of the item
 * after the operation has been performed.  (In practice, this is only
 * useful with merge, not diff; diff callbacks will probably set
 * @a *state to @c svn_wc_notify_state_unknown, since they do not change
 * the state and therefore do not bother to know the state after the
 * operation.)  By default, @a state refers to the item's content
 * state.  Functions concerned with property state have separate
 * @a contentstate and @a propstate arguments.
 *
 * @since New in 1.6.
 */
typedef struct svn_wc_diff_callbacks3_t
{
  /**
   * A file @a path has changed.  If @a tmpfile2 is non-NULL, the
   * contents have changed and those changes can be seen by comparing
   * @a tmpfile1 and @a tmpfile2, which represent @a rev1 and @a rev2 of
   * the file, respectively.
   *
   * If known, the @c svn:mime-type value of each file is passed into
   * @a mimetype1 and @a mimetype2;  either or both of the values can
   * be NULL.  The implementor can use this information to decide if
   * (or how) to generate differences.
   *
   * @a propchanges is an array of (@c svn_prop_t) structures. If it contains
   * any elements, the original list of properties is provided in
   * @a originalprops, which is a hash of @c svn_string_t values, keyed on the
   * property name.
   *
   */
  svn_error_t *(*file_changed)(svn_wc_adm_access_t *adm_access,
                               svn_wc_notify_state_t *contentstate,
                               svn_wc_notify_state_t *propstate,
                               const char *path,
                               const char *tmpfile1,
                               const char *tmpfile2,
                               svn_revnum_t rev1,
                               svn_revnum_t rev2,
                               const char *mimetype1,
                               const char *mimetype2,
                               const apr_array_header_t *propchanges,
                               apr_hash_t *originalprops,
                               void *diff_baton);

  /**
   * A file @a path was added.  The contents can be seen by comparing
   * @a tmpfile1 and @a tmpfile2, which represent @a rev1 and @a rev2
   * of the file, respectively.  (If either file is empty, the rev
   * will be 0.)
   *
   * If known, the @c svn:mime-type value of each file is passed into
   * @a mimetype1 and @a mimetype2;  either or both of the values can
   * be NULL.  The implementor can use this information to decide if
   * (or how) to generate differences.
   *
   * @a propchanges is an array of (@c svn_prop_t) structures.  If it contains
   * any elements, the original list of properties is provided in
   * @a originalprops, which is a hash of @c svn_string_t values, keyed on the
   * property name.
   */
  svn_error_t *(*file_added)(svn_wc_adm_access_t *adm_access,
                             svn_wc_notify_state_t *contentstate,
                             svn_wc_notify_state_t *propstate,
                             const char *path,
                             const char *tmpfile1,
                             const char *tmpfile2,
                             svn_revnum_t rev1,
                             svn_revnum_t rev2,
                             const char *mimetype1,
                             const char *mimetype2,
                             const apr_array_header_t *propchanges,
                             apr_hash_t *originalprops,
                             void *diff_baton);

  /**
   * A file @a path was deleted.  The [loss of] contents can be seen by
   * comparing @a tmpfile1 and @a tmpfile2.  @a originalprops provides
   * the properties of the file.
   *
   * If known, the @c svn:mime-type value of each file is passed into
   * @a mimetype1 and @a mimetype2;  either or both of the values can
   * be NULL.  The implementor can use this information to decide if
   * (or how) to generate differences.
   */
  svn_error_t *(*file_deleted)(svn_wc_adm_access_t *adm_access,
                               svn_wc_notify_state_t *state,
                               const char *path,
                               const char *tmpfile1,
                               const char *tmpfile2,
                               const char *mimetype1,
                               const char *mimetype2,
                               apr_hash_t *originalprops,
                               void *diff_baton);

  /**
   * A directory @a path was added.  @a rev is the revision that the
   * directory came from.
   */
  svn_error_t *(*dir_added)(svn_wc_adm_access_t *adm_access,
                            svn_wc_notify_state_t *state,
                            const char *path,
                            svn_revnum_t rev,
                            void *diff_baton);

  /**
   * A directory @a path was deleted.
   */
  svn_error_t *(*dir_deleted)(svn_wc_adm_access_t *adm_access,
                              svn_wc_notify_state_t *state,
                              const char *path,
                              void *diff_baton);

  /**
   * A list of property changes (@a propchanges) was applied to the
   * directory @a path.
   *
   * The array is a list of (@c svn_prop_t) structures.
   *
   * The original list of properties is provided in @a original_props,
   * which is a hash of @c svn_string_t values, keyed on the property
   * name.
   */
  svn_error_t *(*dir_props_changed)(svn_wc_adm_access_t *adm_access,
                                    svn_wc_notify_state_t *propstate,
                                    const char *path,
                                    const apr_array_header_t *propchanges,
                                    apr_hash_t *original_props,
                                    void *diff_baton);

  /**
   * A directory @a path has been opened.  @a rev is the revision that the
   * directory came from.
   *
   */
  svn_error_t *(*dir_opened)(svn_wc_adm_access_t *adm_access,
                             const char *path,
                             svn_revnum_t rev,
                             void *diff_baton);

  /**
   * A directory @a path has been closed.
   *
   * If @a state is non-NULL, set @a *state to the tree-conflict state
   * of the directory.
   *
   * The client may now report the final state of the directory's
   * children (e.g., report a path as 'replaced').
   */
  svn_error_t *(*dir_closed)(svn_wc_adm_access_t *adm_access,
                             svn_wc_notify_state_t *state,
                             const char *path,
                             void *diff_baton);

} svn_wc_diff_callbacks3_t;

/**
 * Similar to @c svn_wc_diff_callbacks3_t, but without dir_opened or
 * dir_closed functions.
 *
 * @deprecated Provided for backward compatibility with the 1.2 API.
 */
typedef struct svn_wc_diff_callbacks2_t
{
  /** The same as @c file_changed in @c svn_wc_diff_callbacks3_t. */
  svn_error_t *(*file_changed)(svn_wc_adm_access_t *adm_access,
                               svn_wc_notify_state_t *contentstate,
                               svn_wc_notify_state_t *propstate,
                               const char *path,
                               const char *tmpfile1,
                               const char *tmpfile2,
                               svn_revnum_t rev1,
                               svn_revnum_t rev2,
                               const char *mimetype1,
                               const char *mimetype2,
                               const apr_array_header_t *propchanges,
                               apr_hash_t *originalprops,
                               void *diff_baton);

  /** The same as @c file_added in @c svn_wc_diff_callbacks3_t. */
  svn_error_t *(*file_added)(svn_wc_adm_access_t *adm_access,
                             svn_wc_notify_state_t *contentstate,
                             svn_wc_notify_state_t *propstate,
                             const char *path,
                             const char *tmpfile1,
                             const char *tmpfile2,
                             svn_revnum_t rev1,
                             svn_revnum_t rev2,
                             const char *mimetype1,
                             const char *mimetype2,
                             const apr_array_header_t *propchanges,
                             apr_hash_t *originalprops,
                             void *diff_baton);

  /** The same as @c file_deleted in @c svn_wc_diff_callbacks3_t. */
  svn_error_t *(*file_deleted)(svn_wc_adm_access_t *adm_access,
                               svn_wc_notify_state_t *state,
                               const char *path,
                               const char *tmpfile1,
                               const char *tmpfile2,
                               const char *mimetype1,
                               const char *mimetype2,
                               apr_hash_t *originalprops,
                               void *diff_baton);

  /** The same as @c dir_added in @c svn_wc_diff_callbacks3_t. */
  svn_error_t *(*dir_added)(svn_wc_adm_access_t *adm_access,
                            svn_wc_notify_state_t *state,
                            const char *path,
                            svn_revnum_t rev,
                            void *diff_baton);

  /** The same as @c dir_deleted in @c svn_wc_diff_callbacks3_t. */
  svn_error_t *(*dir_deleted)(svn_wc_adm_access_t *adm_access,
                              svn_wc_notify_state_t *state,
                              const char *path,
                              void *diff_baton);

  /** The same as @c dir_props_changed in @c svn_wc_diff_callbacks3_t. */
  svn_error_t *(*dir_props_changed)(svn_wc_adm_access_t *adm_access,
                                    svn_wc_notify_state_t *state,
                                    const char *path,
                                    const apr_array_header_t *propchanges,