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src/subversion/subversion/libsvn_wc/merge.c  view on Meta::CPAN

  SVN_ERR(svn_io_open_uniquely_named(
            NULL, right_copy, dir_abspath, target_name, right_label,
            svn_io_file_del_none, result_pool, scratch_pool));
  SVN_ERR(svn_io_open_uniquely_named(
            NULL, target_copy, dir_abspath, target_name, target_label,
            svn_io_file_del_none, result_pool, scratch_pool));

  /* We preserve all the files with keywords expanded and line
     endings in local (working) form. */

  /* The workingqueue requires its paths to be in the subtree
     relative to the wcroot path they are executed in.

     Make our LEFT and RIGHT files 'local' if they aren't... */
  if (! svn_dirent_is_ancestor(wcroot_abspath, left_abspath))
    {
      SVN_ERR(svn_io_open_unique_file3(NULL, &tmp_left, temp_dir_abspath,
                                       svn_io_file_del_none,
                                       scratch_pool, scratch_pool));
      SVN_ERR(svn_io_copy_file(left_abspath, tmp_left, TRUE, scratch_pool));

      /* And create a wq item to remove the file later */
      SVN_ERR(svn_wc__wq_build_file_remove(&work_item, mt->db, wcroot_abspath,
                                           tmp_left,
                                           result_pool, scratch_pool));

      last_items = svn_wc__wq_merge(last_items, work_item, result_pool);
    }
  else
    tmp_left = left_abspath;

  if (! svn_dirent_is_ancestor(wcroot_abspath, right_abspath))
    {
      SVN_ERR(svn_io_open_unique_file3(NULL, &tmp_right, temp_dir_abspath,
                                       svn_io_file_del_none,
                                       scratch_pool, scratch_pool));
      SVN_ERR(svn_io_copy_file(right_abspath, tmp_right, TRUE, scratch_pool));

      /* And create a wq item to remove the file later */
      SVN_ERR(svn_wc__wq_build_file_remove(&work_item, mt->db, wcroot_abspath,
                                           tmp_right,
                                           result_pool, scratch_pool));

      last_items = svn_wc__wq_merge(last_items, work_item, result_pool);
    }
  else
    tmp_right = right_abspath;

  /* NOTE: Callers must ensure that the svn:eol-style and
     svn:keywords property values are correct in the currently
     installed props.  With 'svn merge', it's no big deal.  But
     when 'svn up' calls this routine, it needs to make sure that
     this routine is using the newest property values that may
     have been received *during* the update.  Since this routine
     will be run from within a log-command, merge_file()
     needs to make sure that a previous log-command to 'install
     latest props' has already executed first.  Ben and I just
     checked, and that is indeed the order in which the log items
     are written, so everything should be fine.  Really.  */

  /* Create LEFT and RIGHT backup files, in expanded form.
     We use TARGET_ABSPATH's current properties to do the translation. */
  /* Derive the basenames of the 3 backup files. */
  SVN_ERR(svn_wc__wq_build_file_copy_translated(&work_item,
                                                mt->db, mt->local_abspath,
                                                tmp_left, *left_copy,
                                                result_pool, scratch_pool));
  *work_items = svn_wc__wq_merge(*work_items, work_item, result_pool);

  SVN_ERR(svn_wc__wq_build_file_copy_translated(&work_item,
                                                mt->db, mt->local_abspath,
                                                tmp_right, *right_copy,
                                                result_pool, scratch_pool));
  *work_items = svn_wc__wq_merge(*work_items, work_item, result_pool);

  /* Back up TARGET_ABSPATH through detranslation/retranslation:
     the new translation properties may not match the current ones */
  SVN_ERR(detranslate_wc_file(&detranslated_target_copy, mt, TRUE,
                              mt->local_abspath,
                              cancel_func, cancel_baton,
                              scratch_pool, scratch_pool));

  SVN_ERR(svn_wc__wq_build_file_copy_translated(&work_item,
                                                mt->db, mt->local_abspath,
                                                detranslated_target_copy,
                                                *target_copy,
                                                result_pool, scratch_pool));
  *work_items = svn_wc__wq_merge(*work_items, work_item, result_pool);

  /* And maybe delete some tempfiles */
  SVN_ERR(svn_wc__wq_build_file_remove(&work_item, mt->db, wcroot_abspath,
                                       detranslated_target_copy,
                                       result_pool, scratch_pool));
  *work_items = svn_wc__wq_merge(*work_items, work_item, result_pool);

  *work_items = svn_wc__wq_merge(*work_items, last_items, result_pool);

  return SVN_NO_ERROR;
}

/* Attempt a trivial merge of LEFT_ABSPATH and RIGHT_ABSPATH to
 * the target file at TARGET_ABSPATH.
 *
 * These are the inherently trivial cases:
 *
 *   left == right == target         =>  no-op
 *   left != right, left == target   =>  target := right
 *
 * This case is also treated as trivial:
 *
 *   left != right, right == target  =>  no-op
 *
 *   ### Strictly, this case is a conflict, and the no-op outcome is only
 *       one of the possible resolutions.
 *
 *       TODO: Raise a conflict at this level and implement the 'no-op'
 *       resolution of that conflict at a higher level, in preparation for
 *       being able to support stricter conflict detection.
 *
 * This case is inherently trivial but not currently handled here:
 *
 *   left == right != target         =>  no-op
 *

src/subversion/subversion/libsvn_wc/merge.c  view on Meta::CPAN

                                            result_target,
                                            FALSE /* use_commit_times */,
                                            FALSE /* record_fileinfo */,
                                            result_pool, scratch_pool));
      *work_items = svn_wc__wq_merge(*work_items, work_item, result_pool);
    }

done:
  /* Remove the tempfile after use */
  SVN_ERR(svn_wc__wq_build_file_remove(&work_item, mt->db, mt->local_abspath,
                                       result_target,
                                       result_pool, scratch_pool));

  *work_items = svn_wc__wq_merge(*work_items, work_item, result_pool);

  return SVN_NO_ERROR;
}

/* Handle a non-trivial merge of 'binary' files: don't actually merge, just
 * flag a conflict.  (Assume that a trivial merge was not possible.)
 *
 * Copy* the files at LEFT_ABSPATH and RIGHT_ABSPATH into the same directory
 * as the target file, giving them unique names that start with the target
 * file's name and end with LEFT_LABEL and RIGHT_LABEL respectively.
 * If the merge target has been 'detranslated' to repository normal form,
 * move the detranslated file similarly to a unique name ending with
 * TARGET_LABEL.
 *
 * ### * Why do we copy the left and right temp files when we could (maybe
 *     not always?) move them?
 *
 * On entry, all of the output pointers must be non-null and *CONFLICT_SKEL
 * must either point to an existing conflict skel or be NULL.
 *
 * Set *WORK_ITEMS, *CONFLICT_SKEL and *MERGE_OUTCOME to indicate the
 * conflict.
 *
 * ### Why do we not use preserve_pre_merge_files() in here?  The
 *     behaviour would be slightly different, more consistent: the
 *     preserved 'left' and 'right' files would be translated to working
 *     copy form, which may make a difference when a binary file
 *     contains keyword expansions or when some versions of the file are
 *     not 'binary' even though we're merging in 'binary files' mode.
 */
static svn_error_t *
merge_binary_file(svn_skel_t **work_items,
                  svn_skel_t **conflict_skel,
                  enum svn_wc_merge_outcome_t *merge_outcome,
                  const merge_target_t *mt,
                  const char *left_abspath,
                  const char *right_abspath,
                  const char *left_label,
                  const char *right_label,
                  const char *target_label,
                  svn_boolean_t dry_run,
                  const char *detranslated_target_abspath,
                  apr_pool_t *result_pool,
                  apr_pool_t *scratch_pool)
{
  apr_pool_t *pool = scratch_pool;  /* ### temporary rename  */
  /* ### when making the binary-file backups, should we be honoring
     keywords and eol stuff?   */
  const char *left_copy, *right_copy;
  const char *merge_dirpath, *merge_filename;
  const char *conflict_wrk;

  *work_items = NULL;

  svn_dirent_split(&merge_dirpath, &merge_filename, mt->local_abspath, pool);

  if (dry_run)
    {
      *merge_outcome = svn_wc_merge_conflict;
      return SVN_NO_ERROR;
    }

  /* reserve names for backups of left and right fulltexts */
  SVN_ERR(svn_io_open_uniquely_named(NULL,
                                     &left_copy,
                                     merge_dirpath,
                                     merge_filename,
                                     left_label,
                                     svn_io_file_del_none,
                                     pool, pool));

  SVN_ERR(svn_io_open_uniquely_named(NULL,
                                     &right_copy,
                                     merge_dirpath,
                                     merge_filename,
                                     right_label,
                                     svn_io_file_del_none,
                                     pool, pool));

  /* create the backup files */
  SVN_ERR(svn_io_copy_file(left_abspath, left_copy, TRUE, pool));
  SVN_ERR(svn_io_copy_file(right_abspath, right_copy, TRUE, pool));

  /* Was the merge target detranslated? */
  if (strcmp(mt->local_abspath, detranslated_target_abspath) != 0)
    {
      /* Create a .mine file too */
      SVN_ERR(svn_io_open_uniquely_named(NULL,
                                         &conflict_wrk,
                                         merge_dirpath,
                                         merge_filename,
                                         target_label,
                                         svn_io_file_del_none,
                                         pool, pool));
      SVN_ERR(svn_wc__wq_build_file_move(work_items, mt->db,
                                         mt->local_abspath,
                                         detranslated_target_abspath,
                                         conflict_wrk,
                                         pool, result_pool));
    }
  else
    {
      conflict_wrk = NULL;
    }

  /* Mark target_abspath's entry as "Conflicted", and start tracking
     the backup files in the entry as well. */
  if (!*conflict_skel)
    *conflict_skel = svn_wc__conflict_skel_create(result_pool);

  SVN_ERR(svn_wc__conflict_skel_add_text_conflict(*conflict_skel,
                                                  mt->db, mt->local_abspath,
                                                  conflict_wrk,
                                                  left_copy,
                                                  right_copy,
                                                  result_pool, scratch_pool));

  *merge_outcome = svn_wc_merge_conflict; /* a conflict happened */

  return SVN_NO_ERROR;
}

svn_error_t *
svn_wc__internal_merge(svn_skel_t **work_items,
                       svn_skel_t **conflict_skel,
                       enum svn_wc_merge_outcome_t *merge_outcome,
                       svn_wc__db_t *db,
                       const char *left_abspath,
                       const char *right_abspath,
                       const char *target_abspath,
                       const char *wri_abspath,
                       const char *left_label,
                       const char *right_label,
                       const char *target_label,
                       apr_hash_t *old_actual_props,
                       svn_boolean_t dry_run,
                       const char *diff3_cmd,
                       const apr_array_header_t *merge_options,
                       const apr_array_header_t *prop_diff,
                       svn_cancel_func_t cancel_func,
                       void *cancel_baton,
                       apr_pool_t *result_pool,
                       apr_pool_t *scratch_pool)
{
  const char *detranslated_target_abspath;
  svn_boolean_t is_binary = FALSE;
  const svn_prop_t *mimeprop;
  svn_skel_t *work_item;
  merge_target_t mt;

  SVN_ERR_ASSERT(svn_dirent_is_absolute(left_abspath));
  SVN_ERR_ASSERT(svn_dirent_is_absolute(right_abspath));
  SVN_ERR_ASSERT(svn_dirent_is_absolute(target_abspath));

  *work_items = NULL;

  /* Fill the merge target baton */
  mt.db = db;
  mt.local_abspath = target_abspath;
  mt.wri_abspath = wri_abspath;
  mt.old_actual_props = old_actual_props;
  mt.prop_diff = prop_diff;
  mt.diff3_cmd = diff3_cmd;
  mt.merge_options = merge_options;

  /* Decide if the merge target is a text or binary file. */
  if ((mimeprop = get_prop(prop_diff, SVN_PROP_MIME_TYPE))