Ignore empty XDG_CONFIG_DIRS
As the specification says we should. GLib does this as well. It is still possible to achieve an empty set by using ":", which are two non-absolute paths that should be ignored. GLib doesn't implement this. Thus, we're now better than GLib.
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sdn.cpp
2
sdn.cpp
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@ -268,7 +268,7 @@ fun xdg_config_home () -> string {
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fun xdg_config_find (const string &suffix) -> unique_ptr<ifstream> {
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vector<string> dirs {xdg_config_home ()};
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const char *system_dirs = getenv ("XDG_CONFIG_DIRS");
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split (system_dirs ? system_dirs : "/etc/xdg", ":", dirs);
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split ((system_dirs && *system_dirs) ? system_dirs : "/etc/xdg", ":", dirs);
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for (const auto &dir : dirs) {
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if (dir[0] != '/')
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continue;
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