forked from lix-project/lix
128 lines
3.2 KiB
C++
128 lines
3.2 KiB
C++
#pragma once
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#include "util.hh"
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#include <signal.h>
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#include <locale>
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namespace nix {
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MakeError(UsageError, nix::Error);
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class Exit : public std::exception
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{
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public:
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int status;
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Exit() : status(0) { }
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Exit(int status) : status(status) { }
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};
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class StoreAPI;
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int handleExceptions(const string & programName, std::function<void()> fun);
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void initNix();
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void parseCmdLine(int argc, char * * argv,
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std::function<bool(Strings::iterator & arg, const Strings::iterator & end)> parseArg);
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void printVersion(const string & programName);
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/* Ugh. No better place to put this. */
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void printGCWarning();
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void printMissing(StoreAPI & store, const PathSet & paths);
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void printMissing(const PathSet & willBuild,
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const PathSet & willSubstitute, const PathSet & unknown,
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unsigned long long downloadSize, unsigned long long narSize);
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string getArg(const string & opt,
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Strings::iterator & i, const Strings::iterator & end);
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template<class N> N getIntArg(const string & opt,
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Strings::iterator & i, const Strings::iterator & end, bool allowUnit)
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{
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++i;
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if (i == end) throw UsageError(format("‘%1%’ requires an argument") % opt);
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string s = *i;
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N multiplier = 1;
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if (allowUnit && !s.empty()) {
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char u = std::toupper(*s.rbegin());
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if (std::isalpha(u)) {
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if (u == 'K') multiplier = 1ULL << 10;
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else if (u == 'M') multiplier = 1ULL << 20;
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else if (u == 'G') multiplier = 1ULL << 30;
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else if (u == 'T') multiplier = 1ULL << 40;
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else throw UsageError(format("invalid unit specifier ‘%1%’") % u);
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s.resize(s.size() - 1);
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}
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}
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N n;
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if (!string2Int(s, n))
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throw UsageError(format("‘%1%’ requires an integer argument") % opt);
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return n * multiplier;
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}
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template<class N> N getFloatArg(const string & opt,
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Strings::iterator & i, const Strings::iterator & end, bool allowUnit)
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{
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++i;
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if (i == end) throw UsageError(format("‘%1%’ requires an argument") % opt);
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string s = *i;
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N multiplier = 1;
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if (allowUnit && !s.empty()) {
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char u = std::toupper(*s.rbegin());
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if (std::isalpha(u)) {
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if (u == 'K') multiplier = 1ULL << 10;
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else if (u == 'M') multiplier = 1ULL << 20;
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else if (u == 'G') multiplier = 1ULL << 30;
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else if (u == 'T') multiplier = 1ULL << 40;
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else throw UsageError(format("invalid unit specifier ‘%1%’") % u);
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s.resize(s.size() - 1);
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}
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}
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N n;
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if (!string2Float(s, n))
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throw UsageError(format("‘%1%’ requires a float argument") % opt);
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return n * multiplier;
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}
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/* Show the manual page for the specified program. */
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void showManPage(const string & name);
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/* The constructor of this class starts a pager if stdout is a
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terminal and $PAGER is set. Stdout is redirected to the pager. */
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class RunPager
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{
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public:
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RunPager();
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~RunPager();
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private:
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Pid pid;
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};
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extern volatile ::sig_atomic_t blockInt;
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/* GC helpers. */
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string showBytes(unsigned long long bytes);
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struct GCResults;
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struct PrintFreed
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{
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bool show;
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const GCResults & results;
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PrintFreed(bool show, const GCResults & results)
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: show(show), results(results) { }
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~PrintFreed();
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};
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}
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