subversion/libsvn_wc/relocate.c

   1 /*
   2  * relocate.c: do wc repos relocation
   3  *
   4  * ====================================================================
   5  *    Licensed to the Apache Software Foundation (ASF) under one
   6  *    or more contributor license agreements.  See the NOTICE file
   7  *    distributed with this work for additional information
   8  *    regarding copyright ownership.  The ASF licenses this file
   9  *    to you under the Apache License, Version 2.0 (the
  10  *    "License"); you may not use this file except in compliance
  11  *    with the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  *    Unless required by applicable law or agreed to in writing,
  16  *    software distributed under the License is distributed on an
  17  *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  18  *    KIND, either express or implied.  See the License for the
  19  *    specific language governing permissions and limitations
  20  *    under the License.
  21  * ====================================================================
  22  */
  23
  24
  25 \f
  26 #include "svn_wc.h"
  27 #include "svn_error.h"
  28 #include "svn_pools.h"
  29 #include "svn_dirent_uri.h"
  30 #include "svn_path.h"
  31
  32 #include "wc.h"
  33 #include "props.h"
  34
  35 #include "svn_private_config.h"
  36
  37 \f
  38 /* If the components of RELPATH exactly match (after being
  39    URI-encoded) the final components of URL, return a copy of URL
  40    minus those components allocated in RESULT_POOL; otherwise, return
  41    NULL. */
  42 static const char *
  43 url_remove_final_relpath(const char *url,
  44                          const char *relpath,
  45                          apr_pool_t *result_pool,
  46                          apr_pool_t *scratch_pool)
  47 {
  48   char *result = apr_pstrdup(result_pool, url);
  49   char *result_end;
  50   const char *relpath_end;
  51
  52   SVN_ERR_ASSERT_NO_RETURN(svn_path_is_url(url));
  53   SVN_ERR_ASSERT_NO_RETURN(svn_relpath_is_canonical(relpath));
  54
  55   if (relpath[0] == 0)
  56     return result;
  57
  58   relpath = svn_path_uri_encode(relpath, scratch_pool);
  59   result_end = result + strlen(result) - 1;
  60   relpath_end = relpath + strlen(relpath) - 1;
  61
  62   while (relpath_end >= relpath)
  63     {
  64       if (*result_end != *relpath_end)
  65         return NULL;
  66
  67       relpath_end--;
  68       result_end--;
  69     }
  70
  71   if (*result_end != '/')
  72     return NULL;
  73
  74   *result_end = 0;
  75
  76   return result;
  77 }
  78
  79 svn_error_t *
  80 svn_wc_relocate4(svn_wc_context_t *wc_ctx,
  81                  const char *local_abspath,
  82                  const char *from,
  83                  const char *to,
  84                  svn_wc_relocation_validator3_t validator,
  85                  void *validator_baton,
  86                  apr_pool_t *scratch_pool)
  87 {
  88   svn_node_kind_t kind;
  89   const char *repos_relpath;
  90   const char *old_repos_root, *old_url;
  91   const char *new_repos_root, *new_url;
  92   size_t from_len;
  93   size_t old_url_len;
  94   const char *uuid;
  95   svn_boolean_t is_wc_root;
  96
  97   SVN_ERR(svn_wc__is_wcroot(&is_wc_root, wc_ctx, local_abspath,
  98                             scratch_pool));
  99   if (! is_wc_root)
 100     {
 101       const char *wcroot_abspath;
 102       svn_error_t *err;
 103
 104       err = svn_wc__db_get_wcroot(&wcroot_abspath, wc_ctx->db,
 105                                   local_abspath, scratch_pool, scratch_pool);
 106       if (err)
 107         {
 108           svn_error_clear(err);
 109           return svn_error_createf(
 110             SVN_ERR_WC_INVALID_OP_ON_CWD, NULL,
 111             _("Cannot relocate '%s' as it is not the root of a working copy"),
 112             svn_dirent_local_style(local_abspath, scratch_pool));
 113         }
 114       else
 115         {
 116           return svn_error_createf(
 117             SVN_ERR_WC_INVALID_OP_ON_CWD, NULL,
 118             _("Cannot relocate '%s' as it is not the root of a working copy; "
 119               "try relocating '%s' instead"),
 120             svn_dirent_local_style(local_abspath, scratch_pool),
 121             svn_dirent_local_style(wcroot_abspath, scratch_pool));
 122         }
 123     }
 124
 125   SVN_ERR(svn_wc__db_read_info(NULL, &kind, NULL, &repos_relpath,
 126                                &old_repos_root, &uuid,
 127                                NULL, NULL, NULL, NULL, NULL, NULL,
 128                                NULL, NULL, NULL, NULL, NULL, NULL,
 129                                NULL, NULL, NULL, NULL, NULL, NULL,
 130                                NULL, NULL, NULL,
 131                                wc_ctx->db, local_abspath, scratch_pool,
 132                                scratch_pool));
 133
 134   if (kind != svn_node_dir)
 135     return svn_error_create(SVN_ERR_CLIENT_INVALID_RELOCATION, NULL,
 136                             _("Cannot relocate a single file"));
 137
 138   old_url = svn_path_url_add_component2(old_repos_root, repos_relpath,
 139                                         scratch_pool);
 140   old_url_len = strlen(old_url);
 141   from_len = strlen(from);
 142   if ((from_len > old_url_len) || (strncmp(old_url, from, strlen(from)) != 0))
 143     return svn_error_createf(SVN_ERR_WC_INVALID_RELOCATION, NULL,
 144                              _("Invalid source URL prefix: '%s' (does not "
 145                                "overlap target's URL '%s')"),
 146                              from, old_url);
 147
 148   if (old_url_len == from_len)
 149     new_url = to;
 150   else
 151     new_url = apr_pstrcat(scratch_pool, to, old_url + from_len, SVN_VA_NULL);
 152   if (! svn_path_is_url(new_url))
 153     return svn_error_createf(SVN_ERR_WC_INVALID_RELOCATION, NULL,
 154                              _("Invalid relocation destination: '%s' "
 155                                "(not a URL)"), new_url);
 156
 157   new_repos_root = url_remove_final_relpath(new_url, repos_relpath,
 158                                             scratch_pool, scratch_pool);
 159   if (!new_repos_root)
 160     return svn_error_createf(SVN_ERR_WC_INVALID_RELOCATION, NULL,
 161                              _("Invalid relocation destination: '%s' "
 162                                "(does not point to target)" ), new_url);
 163
 164   SVN_ERR(validator(validator_baton, uuid, new_url, new_repos_root,
 165                     scratch_pool));
 166
 167   return svn_error_trace(svn_wc__db_global_relocate(wc_ctx->db, local_abspath,
 168                                                     new_repos_root,
 169                                                     scratch_pool));
 170 }