prop_commands.c

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                 apr_pool_t *pool)
{
  struct propget_walk_baton *wb = walk_baton;
  const svn_string_t *propval;

  /* We're going to receive dirents twice;  we want to ignore the
     first one (where it's a child of a parent dir), and only use
     the second one (where we're looking at THIS_DIR).  */
  if ((entry->kind == svn_node_dir)
      && (strcmp (entry->name, SVN_WC_ENTRY_THIS_DIR) != 0))
    return SVN_NO_ERROR;

  /* Ignore the entry if it does not exist at the time of interest. */
  if (entry->schedule
      == (wb->pristine ? svn_wc_schedule_add : svn_wc_schedule_delete))
    return SVN_NO_ERROR;

  SVN_ERR (pristine_or_working_propval (&propval, wb->propname, path,
                                        wb->base_access, wb->pristine,
                                        apr_hash_pool_get (wb->props)));

  if (propval)
    {
      path = apr_pstrdup (apr_hash_pool_get (wb->props), path);
      apr_hash_set (wb->props, path, APR_HASH_KEY_STRING, propval);
    }

  return SVN_NO_ERROR;
}


/* If REVISION represents a revision not present in the working copy,
 * then set *NEW_TARGET to the url for TARGET, allocated in POOL; else
 * set *NEW_TARGET to TARGET (just assign, do not copy), whether or
 * not TARGET is a url.
 *
 * TARGET and *NEW_TARGET may be the same, though most callers
 * probably don't want them to be.
 */
static svn_error_t *
maybe_convert_to_url (const char **new_target,
                      const char *target,
                      const svn_opt_revision_t *revision,
                      apr_pool_t *pool)
{
  /* If we don't already have a url, and the revision kind is such
     that we need a url, then get one. */
  if ((revision->kind != svn_opt_revision_unspecified)
      && (revision->kind != svn_opt_revision_base)
      && (revision->kind != svn_opt_revision_working)
      && (revision->kind != svn_opt_revision_committed)
      && (! svn_path_is_url (target)))
    {
      svn_wc_adm_access_t *adm_access;
      svn_node_kind_t kind;
      const char *pdir;
      const svn_wc_entry_t *entry;
      
      SVN_ERR (svn_io_check_path (target, &kind, pool));
      if (kind == svn_node_file)
        svn_path_split (target, &pdir, NULL, pool);
      else
        pdir = target;
      
      SVN_ERR (svn_wc_adm_open2 (&adm_access, NULL, pdir, FALSE,
                                 0, pool));
      SVN_ERR (svn_wc_entry (&entry, target, adm_access, FALSE, pool));
      if (! entry)
        return svn_error_createf (SVN_ERR_UNVERSIONED_RESOURCE, NULL,
                                  _("'%s' is not under version control"), 
                                  target);
      *new_target = entry->url;
    }
  else
    *new_target = target;

  return SVN_NO_ERROR;
}


/* Helper for the remote case of svn_client_propget.
 *
 * Get the value of property PROPNAME in REVNUM, using RA_LIB and
 * SESSION.  Store the value ('svn_string_t *') in PROPS, under the
 * path key "TARGET_PREFIX/TARGET_RELATIVE" ('const char *').
 *
 * If RECURSE is true and KIND is svn_node_dir, then recurse.
 *
 * KIND is the kind of the node at "TARGET_PREFIX/TARGET_RELATIVE".
 * Yes, caller passes this; it makes the recursion more efficient :-). 
 *
 * Allocate the keys and values in POOL.
 */
static svn_error_t *
remote_propget (apr_hash_t *props,
                const char *propname,
                const char *target_prefix,
                const char *target_relative,
                svn_node_kind_t kind,
                svn_revnum_t revnum,
                svn_ra_plugin_t *ra_lib,
                void *session,
                svn_boolean_t recurse,
                apr_pool_t *pool)
{
  apr_hash_t *dirents;
  apr_hash_t *prop_hash;
  
  if (kind == svn_node_dir)
    {
      SVN_ERR (ra_lib->get_dir (session, target_relative, revnum,
                                (recurse ? &dirents : NULL),
                                NULL, &prop_hash, pool));
    }
  else if (kind == svn_node_file)
    {
      SVN_ERR (ra_lib->get_file (session, target_relative, revnum,
                                 NULL, NULL, &prop_hash, pool));
    }
  else
    {
      return svn_error_createf
        (SVN_ERR_NODE_UNKNOWN_KIND, NULL,
         _("Unknown node kind for '%s'"),
         svn_path_join (target_prefix, target_relative, pool));
    }
  
  apr_hash_set (props,
                svn_path_join (target_prefix, target_relative, pool),
                APR_HASH_KEY_STRING,
                apr_hash_get (prop_hash, propname, APR_HASH_KEY_STRING));
  
  
  if (recurse && (kind == svn_node_dir) && (apr_hash_count (dirents) > 0))
    {
      apr_hash_index_t *hi;

      for (hi = apr_hash_first (pool, dirents);
           hi;
           hi = apr_hash_next (hi))
        {
          const void *key;
          void *val;
          const char *this_name;
          svn_dirent_t *this_ent;
          const char *new_target_relative;

          apr_hash_this (hi, &key, NULL, &val);
          this_name = key;
          this_ent = val;

          new_target_relative = svn_path_join (target_relative,
                                               this_name, pool);

          SVN_ERR (remote_propget (props,
                                   propname,
                                   target_prefix,
                                   new_target_relative,
                                   this_ent->kind,
                                   revnum,
                                   ra_lib,
                                   session,
                                   recurse,
                                   pool));
        }
    }

  return SVN_NO_ERROR;
}


/* Note: this implementation is very similar to svn_client_proplist. */
svn_error_t *
svn_client_propget (apr_hash_t **props,
                    const char *propname,
                    const char *target,
                    const svn_opt_revision_t *revision,
                    svn_boolean_t recurse,
                    svn_client_ctx_t *ctx,
                    apr_pool_t *pool)
{
  svn_wc_adm_access_t *adm_access;
  const svn_wc_entry_t *node;
  const char *utarget;  /* target, or the url for target */
  const char *url;
  svn_revnum_t revnum;

  *props = apr_hash_make (pool);

  SVN_ERR (maybe_convert_to_url (&utarget, target, revision, pool));

  /* Iff utarget is a url, that means we must use it, that is, the
     requested property information is not available locally. */
  if (svn_path_is_url (utarget))
    {
      void *session;
      svn_ra_plugin_t *ra_lib;
      svn_node_kind_t kind;

      /* Get an RA plugin for this filesystem object. */
      SVN_ERR (svn_client__ra_lib_from_path (&ra_lib, &session, &revnum,
                                             &url, target, revision,
                                             ctx, pool));

      SVN_ERR (ra_lib->check_path (session, "", revnum, &kind, pool));

      SVN_ERR (remote_propget (*props, propname, url, "",
                               kind, revnum, ra_lib, session,
                               recurse, pool));
    }
  else  /* working copy path */
    {
      svn_boolean_t pristine;

      SVN_ERR (svn_wc_adm_probe_open2 (&adm_access, NULL, target,
                                       FALSE, recurse ? -1 : 0, pool));
      SVN_ERR (svn_wc_entry (&node, target, adm_access, FALSE, pool));
      if (! node)
        return svn_error_createf 
          (SVN_ERR_UNVERSIONED_RESOURCE, NULL,
           _("'%s' is not under version control"), target);
      
      SVN_ERR (svn_client__get_revision_number
               (&revnum, NULL, NULL, revision, target, pool));

      if ((revision->kind == svn_opt_revision_committed)
          || (revision->kind == svn_opt_revision_base))
        {
          pristine = TRUE;
        }
      else  /* must be the working revision */
        {
          pristine = FALSE;
        }

      /* Fetch, recursively or not. */
      if (recurse && (node->kind == svn_node_dir))
        {
          static const svn_wc_entry_callbacks_t walk_callbacks
            = { propget_walk_cb };
          struct propget_walk_baton wb;

          wb.base_access = adm_access;
          wb.props = *props;
          wb.propname = propname;
          wb.pristine = pristine;

          SVN_ERR (svn_wc_walk_entries (target, adm_access,
                                        &walk_callbacks, &wb, FALSE, pool));
        }
      else
        {
          const svn_string_t *propval;
          
          SVN_ERR (pristine_or_working_propval (&propval, propname, target,
                                                adm_access, pristine, pool));

          apr_hash_set (*props, target, APR_HASH_KEY_STRING, propval);
        }
      
      SVN_ERR (svn_wc_adm_close (adm_access));
    }

  return SVN_NO_ERROR;
}


svn_error_t *
svn_client_revprop_get (const char *propname,
                        svn_string_t **propval,
                        const char *URL,
                        const svn_opt_revision_t *revision,
                        svn_revnum_t *set_rev,
                        svn_client_ctx_t *ctx,
                        apr_pool_t *pool)
{
  void *ra_baton, *session;
  svn_ra_plugin_t *ra_lib;

  /* Open an RA session for the URL. Note that we don't have a local
     directory, nor a place to put temp files. */
  SVN_ERR (svn_ra_init_ra_libs (&ra_baton, pool));
  SVN_ERR (svn_ra_get_ra_library (&ra_lib, ra_baton, URL, pool));
  SVN_ERR (svn_client__open_ra_session (&session, ra_lib, URL, NULL,
                                        NULL, NULL, FALSE, TRUE,
                                        ctx, pool));

  /* Resolve the revision into something real, and return that to the
     caller as well. */
  SVN_ERR (svn_client__get_revision_number
           (set_rev, ra_lib, session, revision, NULL, pool));

  /* The actual RA call. */
  SVN_ERR (ra_lib->rev_prop (session, *set_rev, propname, propval, pool));

  return SVN_NO_ERROR;
}


/* Push a new 'svn_client_proplist_item_t *' item onto LIST.
 * Allocate the item itself in POOL; set item->node_name to an
 * 'svn_stringbuf_t *' created from PATH and also allocated in POOL,
 * and set item->prop_hash to PROP_HASH.
 *
 * If PROP_HASH is null or has zero count, do nothing.
 */
static void
push_props_on_list (apr_array_header_t *list,
                    apr_hash_t *prop_hash,
                    const char *path,
                    apr_pool_t *pool)
{
  if (prop_hash && apr_hash_count (prop_hash))
    {
      svn_client_proplist_item_t *item
        = apr_palloc (pool, sizeof (svn_client_proplist_item_t));
      item->node_name = svn_stringbuf_create (path, pool);