src/lib/find_missing.cc

   1 /*
   2     Copyright (C) 2021 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21
  22 #include "content.h"
  23 #include "dcpomatic_log.h"
  24 #include "find_missing.h"
  25 #include "util.h"
  26 #include <boost/filesystem.hpp>
  27
  28
  29 using std::map;
  30 using std::shared_ptr;
  31 using std::vector;
  32
  33
  34 typedef map<shared_ptr<Content>, vector<boost::filesystem::path>> Replacements;
  35
  36
  37 static
  38 void
  39 search (Replacements& replacement_paths, boost::filesystem::path directory, int depth = 0)
  40 {
  41         boost::system::error_code ec;
  42         for (auto candidate: boost::filesystem::directory_iterator(directory, ec)) {
  43                 LOG_GENERAL("Have candidate %1", candidate.path().string());
  44                 if (boost::filesystem::is_regular_file(candidate.path())) {
  45                         for (auto& replacement: replacement_paths) {
  46                                 for (auto& path: replacement.second) {
  47                                         if (!boost::filesystem::exists(path) && path.filename() == candidate.path().filename()) {
  48                                                 LOG_GENERAL("Accept %1", candidate.path());
  49                                                 path = candidate.path();
  50                                         } else {
  51                                                 LOG_GENERAL("Reject %1", candidate.path());
  52                                         }
  53                                 }
  54                         }
  55                 } else if (boost::filesystem::is_directory(candidate.path()) && depth <= 2) {
  56                         LOG_GENERAL("Recurse into %1", candidate);
  57                         search (replacement_paths, candidate, depth + 1);
  58                 } else {
  59                         LOG_GENERAL("Candidate was ignored; depth=%1", candidate.path().string());
  60                 }
  61         }
  62
  63         /* Just ignore errors when creating the directory_iterator; they can be triggered by things like
  64          * macOS' love of creating random directories (see #2291).
  65          */
  66 }
  67
  68
  69 void
  70 dcpomatic::find_missing (vector<shared_ptr<Content>> content_to_fix, boost::filesystem::path clue)
  71 {
  72         using namespace boost::filesystem;
  73
  74         LOG_GENERAL_NC("Find missing to fix:");
  75         for (auto content: content_to_fix) {
  76                 for (auto file: content->paths()) {
  77                         LOG_GENERAL("  %1", file.string());
  78                 }
  79         }
  80         LOG_GENERAL("Clue is %1", clue);
  81
  82         Replacements replacement_paths;
  83         for (auto content: content_to_fix) {
  84                 replacement_paths[content] = content->paths();
  85         }
  86
  87         search (replacement_paths, is_directory(clue) ? clue : clue.parent_path());
  88
  89         for (auto content: content_to_fix) {
  90                 auto const& repl = replacement_paths[content];
  91                 bool const replacements_exist = std::find_if(repl.begin(), repl.end(), [](path p) { return !exists(p); }) == repl.end();
  92                 LOG_GENERAL("replacements_exist? %1", replacements_exist);
  93                 LOG_GENERAL("digest match? %1", simple_digest(replacement_paths[content]) == content->digest());
  94                 if (replacements_exist && simple_digest(replacement_paths[content]) == content->digest()) {
  95                         LOG_GENERAL_NC("Setting content paths:");
  96                         for (auto const& i: repl) {
  97                                 LOG_GENERAL("  %1", i);
  98                         }
  99                         content->set_paths (repl);
 100                 }
 101         }
 102 }