#pragma once #include "util.hh" #include <signal.h> #include <locale> namespace nix { MakeError(UsageError, nix::Error); class Exit : public std::exception { public: int status; Exit() : status(0) { } Exit(int status) : status(status) { } }; class StoreAPI; int handleExceptions(const string & programName, std::function<void()> fun); void initNix(); void parseCmdLine(int argc, char * * argv, std::function<bool(Strings::iterator & arg, const Strings::iterator & end)> parseArg); void printVersion(const string & programName); /* Ugh. No better place to put this. */ void printGCWarning(); void printMissing(StoreAPI & store, const PathSet & paths); void printMissing(const PathSet & willBuild, const PathSet & willSubstitute, const PathSet & unknown, unsigned long long downloadSize, unsigned long long narSize); string getArg(const string & opt, Strings::iterator & i, const Strings::iterator & end); template<class N> N getIntArg(const string & opt, Strings::iterator & i, const Strings::iterator & end, bool allowUnit) { ++i; if (i == end) throw UsageError(format("‘%1%’ requires an argument") % opt); string s = *i; N multiplier = 1; if (allowUnit && !s.empty()) { char u = std::toupper(*s.rbegin()); if (std::isalpha(u)) { if (u == 'K') multiplier = 1ULL << 10; else if (u == 'M') multiplier = 1ULL << 20; else if (u == 'G') multiplier = 1ULL << 30; else if (u == 'T') multiplier = 1ULL << 40; else throw UsageError(format("invalid unit specifier ‘%1%’") % u); s.resize(s.size() - 1); } } N n; if (!string2Int(s, n)) throw UsageError(format("‘%1%’ requires an integer argument") % opt); return n * multiplier; } /* Show the manual page for the specified program. */ void showManPage(const string & name); /* The constructor of this class starts a pager if stdout is a terminal and $PAGER is set. Stdout is redirected to the pager. */ class RunPager { public: RunPager(); ~RunPager(); private: Pid pid; }; extern volatile ::sig_atomic_t blockInt; /* GC helpers. */ string showBytes(unsigned long long bytes); struct GCResults; struct PrintFreed { bool show; const GCResults & results; PrintFreed(bool show, const GCResults & results) : show(show), results(results) { } ~PrintFreed(); }; }