1 /** 2 * Copyright 2017 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "util.hpp" 18 19 #include <filesystem> 20 #include <string> 21 22 namespace pid_control 23 { 24 25 /* 26 * Replace "**" in the provided path string with an appropriate concrete path 27 * component (the first directory entry found, on the assumption that there 28 * will only be a single candidate). 29 */ 30 31 namespace fs = std::filesystem; 32 FixupPath(std::string original)33std::string FixupPath(std::string original) 34 { 35 std::string::size_type n; 36 37 /* TODO: Consider the merits of using regex for this. */ 38 n = original.find("**"); 39 40 if (n != std::string::npos) 41 { 42 /* This path has some missing pieces and we support it. */ 43 std::string base = original.substr(0, n); 44 std::string fldr; 45 std::string f = original.substr(n + 2, original.size() - (n + 2)); 46 47 /* Equivalent to glob and grab 0th entry. */ 48 for (const auto& folder : fs::directory_iterator(base)) 49 { 50 fldr = folder.path(); 51 break; 52 } 53 54 if (!fldr.length()) 55 { 56 return original; 57 } 58 59 return fldr + f; 60 } 61 62 /* It'll throw an exception when we use it if it's still bad. */ 63 return original; 64 } 65 66 } // namespace pid_control 67