mirror of
https://github.com/NixOS/nix
synced 2024-09-20 11:11:03 -04:00
138 lines
3 KiB
C++
138 lines
3 KiB
C++
#pragma once
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#include "types.hh"
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namespace nix {
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typedef enum {
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lvlError = 0,
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lvlInfo,
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lvlTalkative,
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lvlChatty,
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lvlDebug,
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lvlVomit
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} Verbosity;
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class Activity
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{
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public:
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typedef uint64_t t;
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const t id;
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Activity();
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Activity(const Activity & act) : id(act.id) { };
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Activity(uint64_t id) : id(id) { };
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};
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typedef enum {
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evBuildCreated = 0,
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evBuildStarted = 1,
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evBuildOutput = 2,
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evBuildFinished = 3,
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evDownloadCreated = 4,
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evDownloadDestroyed = 5,
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evDownloadProgress = 6,
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evDownloadSucceeded = 7,
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evSubstitutionCreated = 8,
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evSubstitutionStarted = 9,
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evSubstitutionFinished = 10,
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} EventType;
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struct Event
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{
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struct Field
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{
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// FIXME: use std::variant.
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enum { tInt, tString } type;
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uint64_t i = 0;
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std::string s;
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Field(const std::string & s) : type(tString), s(s) { }
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Field(const char * s) : type(tString), s(s) { }
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Field(const uint64_t & i) : type(tInt), i(i) { }
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Field(const Activity & act) : type(tInt), i(act.id) { }
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};
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typedef std::vector<Field> Fields;
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EventType type;
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Fields fields;
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std::string getS(size_t n) const
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{
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assert(n < fields.size());
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assert(fields[n].type == Field::tString);
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return fields[n].s;
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}
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uint64_t getI(size_t n) const
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{
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assert(n < fields.size());
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assert(fields[n].type == Field::tInt);
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return fields[n].i;
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}
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};
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class Logger
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{
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friend class Activity;
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public:
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virtual ~Logger() { }
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virtual void log(Verbosity lvl, const FormatOrString & fs) = 0;
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void log(const FormatOrString & fs)
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{
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log(lvlInfo, fs);
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}
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virtual void warn(const std::string & msg);
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template<typename... Args>
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void event(EventType type, const Args & ... args)
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{
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Event ev;
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ev.type = type;
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nop{(ev.fields.emplace_back(Event::Field(args)), 1)...};
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event(ev);
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}
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virtual void event(const Event & ev) = 0;
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};
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extern Logger * logger;
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Logger * makeDefaultLogger();
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extern Verbosity verbosity; /* suppress msgs > this */
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/* Print a message if the current log level is at least the specified
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level. Note that this has to be implemented as a macro to ensure
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that the arguments are evaluated lazily. */
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#define printMsg(level, args...) \
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do { \
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if (level <= nix::verbosity) { \
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logger->log(level, fmt(args)); \
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} \
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} while (0)
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#define printError(args...) printMsg(lvlError, args)
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#define printInfo(args...) printMsg(lvlInfo, args)
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#define printTalkative(args...) printMsg(lvlTalkative, args)
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#define debug(args...) printMsg(lvlDebug, args)
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#define vomit(args...) printMsg(lvlVomit, args)
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template<typename... Args>
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inline void warn(const std::string & fs, Args... args)
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{
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boost::format f(fs);
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nop{boost::io::detail::feed(f, args)...};
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logger->warn(f.str());
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}
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void warnOnce(bool & haveWarned, const FormatOrString & fs);
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void writeToStderr(const string & s);
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}
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