// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ /* ###################################################################### ByHash ByHash helper functions ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ #include <config.h> #include<algorithm> #include<string> #include <unistd.h> #include <sys/stat.h> #include <apt-pkg/fileutl.h> #include <apt-pkg/hashes.h> #include "byhash.h" // Delete all files in a directory except the most recent N ones void DeleteAllButMostRecent(std::string dir, int KeepFiles) { struct Cmp { bool operator() (const std::string& lhs, const std::string& rhs) { struct stat buf_l, buf_r; stat(lhs.c_str(), &buf_l); stat(rhs.c_str(), &buf_r); if (buf_l.st_mtim.tv_sec == buf_r.st_mtim.tv_sec) return buf_l.st_mtim.tv_nsec < buf_r.st_mtim.tv_nsec; return buf_l.st_mtim.tv_sec < buf_r.st_mtim.tv_sec; } }; if (!DirectoryExists(dir)) return; auto files = GetListOfFilesInDir(dir, false); std::sort(files.begin(), files.end(), Cmp()); for (auto I=files.begin(); I<files.end()-KeepFiles; ++I) RemoveFile("DeleteAllButMostRecent", *I); } // Takes a input filename (e.g. binary-i386/Packages) and a hashstring // of the Input data and transforms it into a suitable by-hash filename std::string GenByHashFilename(std::string ByHashOutputFile, HashString const &h) { std::string const ByHash = "/by-hash/" + h.HashType() + "/" + h.HashValue(); size_t trailing_slash = ByHashOutputFile.find_last_of("/"); if (trailing_slash == std::string::npos) trailing_slash = 0; ByHashOutputFile = ByHashOutputFile.replace( trailing_slash, ByHashOutputFile.substr(trailing_slash+1).size()+1, ByHash); return ByHashOutputFile; }