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// -*- mode: c++; c-basic-offset: 2; -*-
#include "common.hh"
#include "paths.hh"
#include "xdg.hh"
#include <map>
#include <memory>
#include <pwd.h>
#include <sys/types.h>
#include <unistd.h>
namespace {
std::string home_based_dir(char const* env_name, char const* fallback) {
auto env = getenv(env_name);
if (!env || !*env) {
return Paths::join(XDG::home(), fallback);
}
return Paths::cleanup(env);
}
void dirs(char const* dirs, std::vector<std::string>* ret) {
auto start = dirs;
auto i = dirs;
while (true) {
if (*i == ':' || !*i) {
if (i > start) {
auto tmp = Paths::cleanup(std::string(start, i - start));
if (tmp[0] == '/') {
ret->push_back(tmp);
}
}
if (!*i) break;
start = ++i;
} else {
++i;
}
}
}
void dirs(char const* env_name, char const* fallback,
std::vector<std::string>* ret) {
auto env = getenv(env_name);
if (!env || !*env) {
dirs(fallback, ret);
} else {
dirs(env, ret);
}
}
void remove_dupes(std::vector<std::string>* lst) {
std::multimap<size_t, std::string*> mem;
bool modifying = false;
auto out = lst->begin();
for (auto it = lst->begin(); it != lst->end(); ++it) {
auto len = it->size();
auto pair = mem.equal_range(len);
bool remove = false;
for (auto j = pair.first; j != pair.second; ++j) {
if (*(j->second) == *it) {
remove = true;
break;
}
}
if (remove) {
if (!modifying) {
modifying = true;
out = it;
}
} else {
if (modifying) {
*(out++) = *it;
}
mem.insert(pair.first, std::make_pair(len, &(*it)));
}
}
if (modifying) {
lst->resize(out - lst->begin());
}
}
} // namespace
// static
std::string XDG::config_home() {
return home_based_dir("XDG_CONFIG_HOME", ".config");
}
// static
std::vector<std::string> XDG::config_dirs() {
std::vector<std::string> ret;
ret.push_back(config_home());
dirs("XDG_CONFIG_DIRS", SYSCONFDIR "/xdg", &ret);
remove_dupes(&ret);
return ret;
}
// static
std::string XDG::data_home() {
return home_based_dir("XDG_DATA_HOME", ".local/share");
}
// static
std::vector<std::string> XDG::data_dirs() {
std::vector<std::string> ret;
ret.push_back(data_home());
dirs("XDG_DATA_DIRS", "/usr/local/share/:/usr/share/", &ret);
remove_dupes(&ret);
return ret;
}
// static
std::string XDG::cache_home() {
return home_based_dir("XDG_CACHE_HOME", ".cache");
}
// static
std::string XDG::home() {
auto env = getenv("HOME");
if (!env || !*env) {
auto size = sysconf(_SC_GETPW_R_SIZE_MAX);
if (size == -1) size = 16384;
auto buf = std::unique_ptr<char[]>(new char[size]);
struct passwd pwd;
struct passwd* result;
auto ret = getpwuid_r(getuid(), &pwd, buf.get(), size, &result);
if (result && ret == 0) {
return Paths::cleanup(result->pw_dir);
}
return ".";
}
return Paths::cleanup(env);
}
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