revert.c

linux subdivision ying gai ke yi le ba

/*
 * revert.c:  wrapper around wc revert functionality.
 *
 * ====================================================================
 * Copyright (c) 2000-2004 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/.
 * ====================================================================
 */

/* ==================================================================== */



/*** Includes. ***/

#include "svn_wc.h"
#include "svn_client.h"
#include "svn_string.h"
#include "svn_pools.h"
#include "svn_error.h"
#include "svn_path.h"
#include "svn_time.h"
#include "svn_config.h"
#include "client.h"



/*** Code. ***/

static svn_error_t *
revert (const char *path,
        svn_boolean_t recursive,
        svn_client_ctx_t *ctx,
        apr_pool_t *pool)
{
  svn_wc_adm_access_t *adm_access;
  svn_boolean_t wc_root;
  svn_boolean_t use_commit_times;
  svn_error_t *err, *err2;

  /* We need to open the parent of PATH, if PATH is not a wc root, but we
     don't know if path is a directory.  It gets a bit messy. */
  SVN_ERR (svn_wc_adm_probe_open2 (&adm_access, NULL, path, TRUE,
                                   recursive ? -1 : 0, pool));
  if ((err = svn_wc_is_wc_root (&wc_root, path, adm_access, pool)))
    goto out;
  if (! wc_root)
    {
      const svn_wc_entry_t *entry;
      if ((err = svn_wc_entry (&entry, path, adm_access, FALSE, pool)))
        goto out;

      if (entry->kind == svn_node_dir)
        {
          svn_node_kind_t kind;

          if ((err = svn_io_check_path (path, &kind, pool)))
            goto out;
          if (kind == svn_node_dir)
            {
              /* While we could add the parent to the access baton set, there
                 is no way to close such a set. */
              svn_wc_adm_access_t *dir_access;
              if ((err = svn_wc_adm_close (adm_access))
                  || (err = svn_wc_adm_open2 (&adm_access, NULL,
                                              svn_path_dirname (path, pool),
                                              TRUE, 0, pool))
                  || (err = svn_wc_adm_open2 (&dir_access, adm_access,
                                              path, TRUE,
                                              recursive ? -1 : 0, pool)))
                goto out;
            }
        }
    }

  /* Look for run-time config variables that affect behavior. */
  {
    svn_config_t *cfg = ctx->config
      ? apr_hash_get (ctx->config, SVN_CONFIG_CATEGORY_CONFIG,  
                      APR_HASH_KEY_STRING)
      : NULL;

    if ((err = svn_config_get_bool (cfg, &use_commit_times,
                                    SVN_CONFIG_SECTION_MISCELLANY,
                                    SVN_CONFIG_OPTION_USE_COMMIT_TIMES,
                                    FALSE)))
      goto out;
  }

  err = svn_wc_revert (path, adm_access, recursive, use_commit_times,
                       ctx->cancel_func, ctx->cancel_baton,
                       ctx->notify_func, ctx->notify_baton,
                       pool);

 out:
  /* Close the ADM, but only return errors from that operation if we
     aren't already in an errorful state. */
  err2 = svn_wc_adm_close (adm_access);
  if (err && err2)
    svn_error_clear (err2);
  else if (err2)
    err = err2;

  return err;
}


svn_error_t *
svn_client_revert (const apr_array_header_t *paths,
                   svn_boolean_t recursive,
                   svn_client_ctx_t *ctx,
                   apr_pool_t *pool)
{
  apr_pool_t *subpool = svn_pool_create (pool);
  svn_error_t *err = SVN_NO_ERROR;
  int i;

  for (i = 0; i < paths->nelts; i++)
    {
      const char *path = APR_ARRAY_IDX (paths, i, const char *);

      /* See if we've been asked to cancel this operation. */
      if ((ctx->cancel_func) 
          && ((err = ctx->cancel_func (ctx->cancel_baton))))
        goto errorful;

      err = revert (path, recursive, ctx, subpool);
      if (err)
        {
          /* If one of the targets isn't versioned, just send a 'skip'
             notification and move on. */
          if (err->apr_err == SVN_ERR_ENTRY_NOT_FOUND)
            {
              if (ctx->notify_func)
                (*ctx->notify_func) (ctx->notify_baton, path,
                                     svn_wc_notify_skip, svn_node_unknown,
                                     NULL, svn_wc_notify_state_unknown,
                                     svn_wc_notify_state_unknown,
                                     SVN_INVALID_REVNUM);
              svn_error_clear (err);
              err = SVN_NO_ERROR;
              continue;
            }
          else
            goto errorful;
        }

      svn_pool_clear (subpool);
    }
  
  svn_pool_destroy (subpool);
  
 errorful:

  /* Sleep to ensure timestamp integrity. */
  svn_sleep_for_timestamps ();

  return err;
}