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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,
actBuilds = 104,
actBuild = 105,
actOptimiseStore = 106,
actVerifyPaths = 107,
actSubstitute = 108,
} ActivityType;
typedef enum {
resFileLinked = 100,
resBuildLogLine = 101,
resUntrustedPath = 102,
resCorruptedPath = 103,
resSetPhase = 104,
resProgress = 105,
} ResultType;
typedef uint64_t ActivityId;
class Logger
{
friend class Activity;
public:
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) { }
};
typedef std::vector<Field> Fields;
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);
virtual void startActivity(ActivityId act, ActivityType type,
const std::string & s, const Fields & fields, ActivityId parent) { };
virtual void stopActivity(ActivityId act) { };
virtual void setExpected(ActivityId act, ActivityType type, uint64_t expected) { };
virtual void result(ActivityId act, ResultType type, const Fields & fields) { };
};
extern thread_local ActivityId curActivity;
struct Activity
{
Logger & logger;
const ActivityId id;
Activity(Logger & logger, ActivityType type, const std::string & s = "",
const Logger::Fields & fields = {}, ActivityId parent = curActivity);
Activity(const Activity & act) = delete;
~Activity()
{ logger.stopActivity(id); }
void progress(uint64_t done = 0, uint64_t expected = 0, uint64_t running = 0, uint64_t failed = 0) const
{ result(resProgress, done, expected, running, failed); }
void setExpected(ActivityType type2, uint64_t expected) const
{ logger.setExpected(id, type2, expected); }
template<typename... Args>
void result(ResultType type, const Args & ... args) const
{
Logger::Fields fields;
nop{(fields.emplace_back(Logger::Field(args)), 1)...};
result(type, fields);
}
void result(ResultType type, const Logger::Fields & fields) const
{
logger.result(id, type, fields);
}
friend class Logger;
};
struct PushActivity
{
const ActivityId prevAct;
PushActivity(ActivityId act) : prevAct(curActivity) { curActivity = act; }
~PushActivity() { curActivity = prevAct; }
};
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);
}
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