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#pragma once
///@file
#include "args.hh"
#include "args/root.hh"
#include "common-args.hh"
#include "path.hh"
#include "derived-path.hh"
#include "processes.hh"
#include "strings.hh"
#include <signal.h>
namespace nix {
int handleExceptions(const std::string & programName, std::function<void()> fun);
/**
* Don't forget to call initPlugins() after settings are initialized!
*/
void initNix();
void parseCmdLine(int argc, char * * argv,
std::function<bool(Strings::iterator & arg, const Strings::iterator & end)> parseArg);
void parseCmdLine(const std::string & programName, const Strings & args,
std::function<bool(Strings::iterator & arg, const Strings::iterator & end)> parseArg);
void printVersion(const std::string & programName);
/**
* Ugh. No better place to put this.
*/
void printGCWarning();
class Store;
void printMissing(
ref<Store> store,
const std::vector<DerivedPath> & paths,
Verbosity lvl = lvlInfo);
void printMissing(ref<Store> store, const StorePathSet & willBuild,
const StorePathSet & willSubstitute, const StorePathSet & unknown,
uint64_t downloadSize, uint64_t narSize, Verbosity lvl = lvlInfo);
std::string getArg(const std::string & opt,
Strings::iterator & i, const Strings::iterator & end);
template<class N> N getIntArg(const std::string & opt,
Strings::iterator & i, const Strings::iterator & end, bool allowUnit)
{
++i;
if (i == end) throw UsageError("'%1%' requires an argument", opt);
return string2IntWithUnitPrefix<N>(*i);
}
struct LegacyArgs : public MixCommonArgs, public RootArgs
{
std::function<bool(Strings::iterator & arg, const Strings::iterator & end)> parseArg;
LegacyArgs(const std::string & programName,
std::function<bool(Strings::iterator & arg, const Strings::iterator & end)> parseArg);
bool processFlag(Strings::iterator & pos, Strings::iterator end) override;
bool processArgs(const Strings & args, bool finish) override;
};
/**
* Show the manual page for the specified program.
*/
void showManPage(const std::string & name);
/**
* The constructor of this class starts a pager if standard output is a
* terminal and $PAGER is set. Standard output is redirected to the
* pager.
*/
class RunPager
{
public:
RunPager();
~RunPager();
private:
Pid pid;
int std_out;
};
extern volatile ::sig_atomic_t blockInt;
/* GC helpers. */
std::string showBytes(uint64_t bytes);
struct GCResults;
struct PrintFreed
{
bool show;
const GCResults & results;
PrintFreed(bool show, const GCResults & results)
: show(show), results(results) { }
~PrintFreed();
};
/**
* Install a SIGSEGV handler to detect stack overflows.
*/
void detectStackOverflow();
/**
* Pluggable behavior to run in case of a stack overflow.
*
* Default value: defaultStackOverflowHandler.
*
* This is called by the handler installed by detectStackOverflow().
*
* This gives Lix library consumers a limit opportunity to report the error
* condition. The handler should exit the process.
* See defaultStackOverflowHandler() for a reference implementation.
*
* NOTE: Use with diligence, because this runs in the signal handler, with very
* limited stack space and a potentially a corrupted heap, all while the failed
* thread is blocked indefinitely. All functions called must be reentrant.
*/
extern std::function<void(siginfo_t * info, void * ctx)> stackOverflowHandler;
/**
* The default, robust implementation of stackOverflowHandler.
*
* Prints an error message directly to stderr using a syscall instead of the
* logger. Exits the process immediately after.
*/
void defaultStackOverflowHandler(siginfo_t * info, void * ctx);
}
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