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1 /* |
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2 * Xdg.cpp -- XDG directory specifications |
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3 * |
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4 * Copyright (c) 2013, 2014, 2015 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
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19 #include <cstdlib> |
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20 #include <stdexcept> |
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21 #include <sstream> |
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22 |
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23 #include "xdg.h" |
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24 |
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25 namespace irccd { |
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26 |
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27 namespace { |
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28 |
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29 bool isabsolute(const std::string &path) |
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30 { |
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31 return path.length() > 0 && path[0] == '/'; |
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32 } |
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33 |
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34 std::vector<std::string> split(const std::string &arg) |
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35 { |
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36 std::stringstream iss(arg); |
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37 std::string item; |
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38 std::vector<std::string> elems; |
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39 |
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40 while (std::getline(iss, item, ':')) |
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41 if (isabsolute(item)) |
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42 elems.push_back(item); |
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43 |
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44 return elems; |
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45 } |
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46 |
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47 std::string envOrHome(const std::string &var, const std::string &repl) |
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48 { |
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49 auto value = getenv(var.c_str()); |
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50 |
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51 if (value == nullptr || !isabsolute(value)) { |
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52 auto home = getenv("HOME"); |
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53 |
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54 if (home == nullptr) |
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55 throw std::runtime_error("could not get home directory"); |
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56 |
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57 return std::string(home) + "/" + repl; |
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58 } |
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59 |
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60 return value; |
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61 } |
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62 |
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63 std::vector<std::string> listOrDefaults(const std::string &var, const std::vector<std::string> &list) |
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64 { |
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65 auto value = getenv(var.c_str()); |
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66 |
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67 if (!value) |
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68 return list; |
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69 |
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70 // No valid item at all? Use defaults |
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71 auto result = split(value); |
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72 |
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73 return (result.size() == 0) ? list : result; |
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74 } |
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75 |
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76 } // !namespace |
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77 |
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78 Xdg::Xdg() |
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79 { |
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80 m_configHome = envOrHome("XDG_CONFIG_HOME", ".config"); |
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81 m_dataHome = envOrHome("XDG_DATA_HOME", ".local/share"); |
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82 m_cacheHome = envOrHome("XDG_CACHE_HOME", ".cache"); |
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83 |
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84 m_configDirs = listOrDefaults("XDG_CONFIG_DIRS", { "/etc/xdg" }); |
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85 m_dataDirs = listOrDefaults("XDG_DATA_DIRS", { "/usr/local/share", "/usr/share" }); |
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86 |
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87 /* |
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88 * Runtime directory is a special case and does not have a replacement, the |
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89 * application should manage this by itself. |
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90 */ |
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91 auto runtime = getenv("XDG_RUNTIME_DIR"); |
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92 if (runtime && isabsolute(runtime)) |
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93 m_runtimeDir = runtime; |
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94 } |
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95 |
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96 const std::string &Xdg::configHome() const noexcept |
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97 { |
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98 return m_configHome; |
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99 } |
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100 |
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101 const std::string &Xdg::dataHome() const noexcept |
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102 { |
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103 return m_dataHome; |
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104 } |
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105 |
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106 const std::string &Xdg::cacheHome() const noexcept |
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107 { |
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108 return m_cacheHome; |
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109 } |
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110 |
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111 const std::string &Xdg::runtimeDir() const |
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112 { |
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113 if (m_runtimeDir.size() == 0) |
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114 throw std::runtime_error("XDG_RUNTIME_DIR is not set"); |
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115 |
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116 return m_runtimeDir; |
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117 } |
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118 |
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119 const Xdg::List &Xdg::configDirs() const noexcept |
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120 { |
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121 return m_configDirs; |
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122 } |
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123 |
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124 const Xdg::List &Xdg::dataDirs() const noexcept |
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125 { |
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126 return m_dataDirs; |
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127 } |
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128 |
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129 } // !irccd |
