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#pragma once
#include "types.hh"
namespace nix {
typedef enum {
lvlError = 0,
lvlInfo,
lvlTalkative,
lvlChatty,
lvlDebug,
lvlVomit
} Verbosity;
typedef enum {
actUnknown = 0,
actCopyPath = 100,
actDownload = 101,
actRealise = 102,
actCopyPaths = 103,
} ActivityType;
class Activity
{
public:
typedef uint64_t t;
const t id;
Activity();
Activity(const Activity & act) : id(act.id) { };
Activity(uint64_t id) : id(id) { };
Activity(ActivityType type, std::string msg = "");
~Activity();
template<typename... Args>
void progress(const Args & ... args) const;
};
typedef enum {
evBuildCreated = 0,
evBuildStarted = 1,
evBuildOutput = 2,
evBuildFinished = 3,
evStartActivity = 1000,
evStopActivity = 1001,
evProgress = 1002,
evSetExpected = 1003,
} EventType;
struct Event
{
struct Field
{
// FIXME: use std::variant.
enum { tInt, tString } type;
uint64_t i = 0;
std::string s;
Field(const std::string & s) : type(tString), s(s) { }
Field(const char * s) : type(tString), s(s) { }
Field(const uint64_t & i) : type(tInt), i(i) { }
Field(const Activity & act) : type(tInt), i(act.id) { }
};
typedef std::vector<Field> Fields;
EventType type;
Fields fields;
std::string getS(size_t n) const
{
assert(n < fields.size());
assert(fields[n].type == Field::tString);
return fields[n].s;
}
uint64_t getI(size_t n) const
{
assert(n < fields.size());
assert(fields[n].type == Field::tInt);
return fields[n].i;
}
};
class Logger
{
friend class Activity;
public:
virtual ~Logger() { }
virtual void log(Verbosity lvl, const FormatOrString & fs) = 0;
void log(const FormatOrString & fs)
{
log(lvlInfo, fs);
}
virtual void warn(const std::string & msg);
template<typename... Args>
void event(EventType type, const Args & ... args)
{
Event ev;
ev.type = type;
nop{(ev.fields.emplace_back(Event::Field(args)), 1)...};
event(ev);
}
virtual void event(const Event & ev) = 0;
};
extern Logger * logger;
Logger * makeDefaultLogger();
extern Verbosity verbosity; /* suppress msgs > this */
/* Print a message if the current log level is at least the specified
level. Note that this has to be implemented as a macro to ensure
that the arguments are evaluated lazily. */
#define printMsg(level, args...) \
do { \
if (level <= nix::verbosity) { \
logger->log(level, fmt(args)); \
} \
} while (0)
#define printError(args...) printMsg(lvlError, args)
#define printInfo(args...) printMsg(lvlInfo, args)
#define printTalkative(args...) printMsg(lvlTalkative, args)
#define debug(args...) printMsg(lvlDebug, args)
#define vomit(args...) printMsg(lvlVomit, args)
template<typename... Args>
inline void warn(const std::string & fs, Args... args)
{
boost::format f(fs);
nop{boost::io::detail::feed(f, args)...};
logger->warn(f.str());
}
void warnOnce(bool & haveWarned, const FormatOrString & fs);
void writeToStderr(const string & s);
template<typename... Args>
void Activity::progress(const Args & ... args) const
{
Event ev;
ev.type = evProgress;
ev.fields.emplace_back(id);
nop{(ev.fields.emplace_back(Event::Field(args)), 1)...};
logger->event(ev);
}
}
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