CodeCompass

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#include <cstdlib>
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#include <climits>
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#include <unistd.h>
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#include <boost/filesystem.hpp>
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#include <util/filesystem.h>
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namespace fs = boost::filesystem;
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namespace cc
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{
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namespace util
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{
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std::string binaryPathToInstallDir(const char* path)
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{
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  // Expand the path to a full path as given by the shell. This is then stripped
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  // of any symbolic links and relative references.
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  // The path is then parented twice (from binary to "bin" folder, and then
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  // the root).
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  // If the path does not exist, the given binary is searched for in the PATH
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  // environment variable.
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  // TODO: replace else branch with fs::search_path if Boost 1.64 or above is used.
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  if (fs::exists(fs::system_complete(fs::path(path))))
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  {
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    return fs::canonical(fs::system_complete(fs::path(path)))
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      .parent_path().parent_path().string();
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  }
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  else
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  {
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    fs::path pPath;
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    std::string fullPath = std::getenv("PATH");
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    std::string delimiter = ":";
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    std::size_t pos = 0;
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    while ((pos = fullPath.find(delimiter)) != std::string::npos)
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    {
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      pPath = fs::path(fullPath.substr(0, pos)) / fs::path(path);
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      if (fs::exists(fs::path(pPath)))
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      {
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        return fs::canonical(pPath)
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          .parent_path().parent_path().string();
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      }
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      fullPath.erase(0, pos + delimiter.length());
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    }
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  }
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  throw std::runtime_error(std::string("Could not find ") + path + std::string("."));
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}
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std::string findCurrentExecutableDir()
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{
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  char exePath[PATH_MAX];
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  ssize_t len = ::readlink("/proc/self/exe", exePath, sizeof(exePath));
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  if (len == -1 || len == sizeof(exePath))
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    len = 0;
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  exePath[len] = '\0';
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  return fs::path(exePath).parent_path().string();
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}
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bool isRootedUnderAnyOf(
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  const std::vector<std::string>& paths_,
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  const std::string& path_)
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{
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  auto it = paths_.begin();
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  const auto end = paths_.end();
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  while (it != end && path_.rfind(*it, 0) != 0)
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    ++it;
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  return it != end;
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}
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} // namespace util
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} // namespace cc
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