move showTrace to new loggerSettings

src/libexpr/eval.cc

@@ -1232,7 +1232,7 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v, const Pos & po
 
     /* Evaluate the body.  This is conditional on showTrace, because
        catching exceptions makes this function not tail-recursive. */
-    if (settings.showTrace)
+    if (loggerSettings.showTrace.get())
         try {
             lambda.body->eval(*this, env2, v);
         } catch (Error & e) {

src/libmain/loggers.cc

@@ -22,11 +22,11 @@ LogFormat parseLogFormat(const std::string & logFormatStr) {
 Logger * makeDefaultLogger() {
     switch (defaultLogFormat) {
     case LogFormat::raw:
-        return makeSimpleLogger(false, false);
+        return makeSimpleLogger(false);
     case LogFormat::rawWithLogs:
-        return makeSimpleLogger(true, false);
+        return makeSimpleLogger(true);
     case LogFormat::internalJson:
-        return makeJSONLogger(*makeSimpleLogger(true, false));
+        return makeJSONLogger(*makeSimpleLogger(true));
     case LogFormat::bar:
         return makeProgressBar();
     case LogFormat::barWithLogs:

src/libmain/progress-bar.cc

@@ -81,14 +81,12 @@ private:
 
     bool printBuildLogs;
     bool isTTY;
-    bool showTrace;
 
 public:
 
     ProgressBar(bool printBuildLogs, bool isTTY)
         : printBuildLogs(printBuildLogs)
         , isTTY(isTTY)
-        , showTrace(false)
     {
         state_.lock()->active = isTTY;
         updateThread = std::thread([&]() {
@@ -133,16 +131,10 @@ public:
         auto state(state_.lock());
 
         std::stringstream oss;
-        showErrorInfo(oss, ei, showTrace);
+        showErrorInfo(oss, ei, loggerSettings.showTrace.get());
 
         log(*state, ei.level, oss.str());
     }
-    bool getShowTrace() const override {
-        return showTrace;
-    }
-    void setShowTrace(bool showTrace) override {
-        this->showTrace = showTrace;
-    }
 
     void log(State & state, Verbosity lvl, const std::string & s)
     {

src/libmain/shared.cc

@@ -323,9 +323,8 @@ int handleExceptions(const string & programName, std::function<void()> fun)
         printError("Try '%1% --help' for more information.", programName);
         return 1;
     } catch (BaseError & e) {
-        logger->setShowTrace(settings.showTrace);
         logError(e.info());
-        if (e.hasTrace() && !settings.showTrace)
+        if (e.hasTrace() && !loggerSettings.showTrace.get())
             printError("(use '--show-trace' to show detailed location information)");
         return e.status;
     } catch (std::bad_alloc & e) {

src/libstore/daemon.cc

@@ -41,10 +41,9 @@ struct TunnelLogger : public Logger
     Sync<State> state_;
 
     unsigned int clientVersion;
-    bool showTrace;
 
     TunnelLogger(FdSink & to, unsigned int clientVersion)
-        : to(to), clientVersion(clientVersion), showTrace(false) { }
+        : to(to), clientVersion(clientVersion) { }
 
     void enqueueMsg(const std::string & s)
     {
@@ -86,13 +85,6 @@ struct TunnelLogger : public Logger
         enqueueMsg(*buf.s);
     }
 
-    bool getShowTrace() const override {
-        return showTrace;
-    }
-    void setShowTrace(bool showTrace) override {
-        this->showTrace = showTrace;
-    }
-
     /* startWork() means that we're starting an operation for which we
       want to send out stderr to the client. */
     void startWork()

src/libstore/globals.hh

@@ -196,10 +196,6 @@ public:
     /* Whether to lock the Nix client and worker to the same CPU. */
     bool lockCPU;
 
-    /* Whether to show a stack trace if Nix evaluation fails. */
-    Setting<bool> showTrace{this, false, "show-trace",
-        "Whether to show a stack trace on evaluation errors."};
-
     Setting<SandboxMode> sandboxMode{this,
         #if __linux__
           smEnabled

src/libstore/remote-store.cc

@@ -8,6 +8,7 @@
 #include "derivations.hh"
 #include "pool.hh"
 #include "finally.hh"
+#include "logging.hh"
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -197,7 +198,7 @@ void RemoteStore::setOptions(Connection & conn)
         overrides.erase(settings.maxSilentTime.name);
         overrides.erase(settings.buildCores.name);
         overrides.erase(settings.useSubstitutes.name);
-        overrides.erase(settings.showTrace.name);
+        overrides.erase(loggerSettings.showTrace.name);
         conn.to << overrides.size();
         for (auto & i : overrides)
             conn.to << i.first << i.second.value;

src/libutil/logging.cc

@@ -1,5 +1,6 @@
 #include "logging.hh"
 #include "util.hh"
+#include "config.hh"
 
 #include <atomic>
 #include <nlohmann/json.hpp>
@@ -7,6 +8,10 @@
 
 namespace nix {
 
+LoggerSettings loggerSettings;
+
+static GlobalConfig::Register r1(&loggerSettings);
+
 static thread_local ActivityId curActivity = 0;
 
 ActivityId getCurActivity()
@@ -18,7 +23,7 @@ void setCurActivity(const ActivityId activityId)
     curActivity = activityId;
 }
 
-Logger * logger = makeSimpleLogger(true, false);
+Logger * logger = makeSimpleLogger(true);
 
 void Logger::warn(const std::string & msg)
 {
@@ -36,10 +41,9 @@ public:
 
     bool systemd, tty;
     bool printBuildLogs;
-    bool showTrace;
 
-    SimpleLogger(bool printBuildLogs, bool showTrace)
+    SimpleLogger(bool printBuildLogs)
-        : printBuildLogs(printBuildLogs), showTrace(showTrace)
+        : printBuildLogs(printBuildLogs)
     {
         systemd = getEnv("IN_SYSTEMD") == "1";
         tty = isatty(STDERR_FILENO);
@@ -49,13 +53,6 @@ public:
         return printBuildLogs;
     }
 
-    bool getShowTrace() const override {
-        return showTrace;
-    }
-    void setShowTrace(bool showTrace) override {
-        this->showTrace = showTrace;
-    }
-
     void log(Verbosity lvl, const FormatOrString & fs) override
     {
         if (lvl > verbosity) return;
@@ -80,7 +77,7 @@ public:
     void logEI(const ErrorInfo & ei) override
     {
         std::stringstream oss;
-        showErrorInfo(oss, ei, showTrace);
+        showErrorInfo(oss, ei, loggerSettings.showTrace.get());
 
         log(ei.level, oss.str());
     }
@@ -129,9 +126,9 @@ void writeToStderr(const string & s)
     }
 }
 
-Logger * makeSimpleLogger(bool printBuildLogs, bool showTrace)
+Logger * makeSimpleLogger(bool printBuildLogs)
 {
-    return new SimpleLogger(printBuildLogs, showTrace);
+    return new SimpleLogger(printBuildLogs);
 }
 
 std::atomic<uint64_t> nextId{(uint64_t) getpid() << 32};
@@ -152,13 +149,6 @@ struct JSONLogger : Logger {
         return true;
     }
 
-    bool getShowTrace() const override {
-        return prevLogger.getShowTrace();
-    }
-    void setShowTrace(bool showTrace) override {
-        prevLogger.setShowTrace(showTrace);
-    }
-
     void addFields(nlohmann::json & json, const Fields & fields)
     {
         if (fields.empty()) return;
@@ -189,7 +179,7 @@ struct JSONLogger : Logger {
     void logEI(const ErrorInfo & ei) override
     {
         std::ostringstream oss;
-        showErrorInfo(oss, ei, getShowTrace());
+        showErrorInfo(oss, ei, loggerSettings.showTrace.get());
 
         nlohmann::json json;
         json["action"] = "msg";

src/libutil/logging.hh

@@ -2,6 +2,7 @@
 
 #include "types.hh"
 #include "error.hh"
+#include "config.hh"
 
 namespace nix {
 
@@ -34,6 +35,16 @@ typedef enum {
 
 typedef uint64_t ActivityId;
 
+struct LoggerSettings : Config
+{
+    Setting<bool> showTrace{this,
+        false,
+        "show-trace",
+        "Whether to show a stack trace on evaluation errors."};
+};
+
+extern LoggerSettings loggerSettings;
+
 class Logger
 {
     friend struct Activity;
@@ -75,9 +86,6 @@ public:
         logEI(ei);
     }
 
-    virtual bool getShowTrace() const = 0;
-    virtual void setShowTrace(bool showTrace) = 0;
-
     virtual void warn(const std::string & msg);
 
     virtual void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
@@ -149,7 +157,7 @@ struct PushActivity
 
 extern Logger * logger;
 
-Logger * makeSimpleLogger(bool printBuildLogs = true, bool showTrace = false);
+Logger * makeSimpleLogger(bool printBuildLogs = true);
 
 Logger * makeJSONLogger(Logger & prevLogger);
 

src/libutil/tests/logging.cc

@@ -266,7 +266,7 @@ namespace nix {
 
         testing::internal::CaptureStderr();
 
-        logger->setShowTrace(true);
+        loggerSettings.showTrace.assign(true);
 
         logError(e.info());
 
@@ -292,7 +292,7 @@ namespace nix {
 
         testing::internal::CaptureStderr();
 
-        logger->setShowTrace(false);
+        loggerSettings.showTrace.assign(false);
 
         logError(e.info());