logError, logWarning; Logger functions; switch to Verbosity enum

src/error-demo/error-demo.cc

@@ -1,4 +1,4 @@
-#include "error.hh"
+#include "logging.hh"
 #include "nixexpr.hh"
 
 #include <iostream>
@@ -8,24 +8,25 @@ int main()
 {
     using namespace nix;
 
+    std::unique_ptr<Logger> logger(makeDefaultLogger());
+
+    verbosity = lvlError;
+
     // In each program where errors occur, this has to be set.
     ErrorInfo::programName = std::optional("error-demo");
 
     // Error in a program; no hint and no nix code.
-    printErrorInfo(
-        ErrorInfo { .level = elError,
-                    .name = "name",
+    logError(
+        ErrorInfo { .name = "name",
                     .description = "error description",
                   });
 
     // Warning with name, description, and hint.
     // The hintfmt function makes all the substituted text yellow.
-    printErrorInfo(
-        ErrorInfo { .level = elWarning,
-                    .name = "name",
+    logWarning(
+        ErrorInfo { .name = "name",
                     .description = "error description",
-                    .hint =  std::optional(
-                                 hintfmt("there was a %1%", "warning")),
+                    .hint = hintfmt("there was a %1%", "warning"),
                   });
 
 
@@ -34,12 +35,12 @@ int main()
     SymbolTable testTable;
     auto problem_file = testTable.create("myfile.nix");
 
-    printErrorInfo(
-        ErrorInfo{
-            .level = elWarning,
-            .name = "warning name",
+    logWarning(
+        ErrorInfo { .name = "warning name",
                     .description = "warning description",
-            .hint = hintfmt("this hint has %1% templated %2%!!", "yellow", "values"),
+                    .hint = hintfmt("this hint has %1% templated %2%!!",
+                                    "yellow",
+                                    "values"),
                     .nixCode = NixCode {
                         .errPos = Pos(problem_file, 40, 13),
                         .prevLineOfCode = std::nullopt,
@@ -48,12 +49,12 @@ int main()
                     }});
 
     // Error with previous and next lines of code.
-    printErrorInfo(
-        ErrorInfo{
-            .level = elError,
-            .name = "error name",
+    logError(
+        ErrorInfo { .name = "error name",
                     .description = "error description",
-            .hint = hintfmt("this hint has %1% templated %2%!!", "yellow", "values"),
+                    .hint = hintfmt("this hint has %1% templated %2%!!",
+                                    "yellow",
+                                    "values"),
                     .nixCode = NixCode {
                         .errPos = Pos(problem_file, 40, 13),
                         .prevLineOfCode = std::optional("previous line of code"),

src/libstore/daemon.cc

@@ -73,6 +73,10 @@ struct TunnelLogger : public Logger
         enqueueMsg(*buf.s);
     }
 
+    void logEI(const ErrorInfo & ei) override
+    {
+    }
+
     /* startWork() means that we're starting an operation for which we
       want to send out stderr to the client. */
     void startWork()

src/libutil/error.cc

@@ -2,6 +2,7 @@
 
 #include <iostream>
 #include <optional>
+#include "serialise.hh"
 
 namespace nix
 {
@@ -66,25 +67,45 @@ void printCodeLines(const string &prefix, const NixCode &nixCode)
     }
 }
 
-void printErrorInfo(const ErrorInfo &einfo)
+std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo)
 {
     int errwidth = 80;
     string prefix = "    ";
 
     string levelString;
     switch (einfo.level) {
-    case ErrLevel::elError: {
+    case Verbosity::lvlError: {
         levelString = ANSI_RED;
         levelString += "error:";
         levelString += ANSI_NORMAL;
         break;
     }
-    case ErrLevel::elWarning: {
+    case Verbosity::lvlWarn: {
         levelString = ANSI_YELLOW;
         levelString += "warning:";
         levelString += ANSI_NORMAL;
         break;
     }
+    case Verbosity::lvlInfo: {
+        levelString = ANSI_YELLOW;
+        levelString += "info:";
+        levelString += ANSI_NORMAL;
+        break;
+    }
+    case Verbosity::lvlTalkative:
+    case Verbosity::lvlChatty:
+    case Verbosity::lvlVomit: {
+        levelString = ANSI_GREEN;
+        levelString += "info:";
+        levelString += ANSI_NORMAL;
+        break;
+    }
+    case Verbosity::lvlDebug: {
+        levelString = ANSI_YELLOW;
+        levelString += "debug:";
+        levelString += ANSI_NORMAL;
+        break;
+    }
     default: {
         levelString = fmt("invalid error level: %1%", einfo.level);
         break;
@@ -99,7 +120,7 @@ void printErrorInfo(const ErrorInfo &einfo)
         dashes.append("-");
 
     // divider.
-    std::cout << fmt("%1%%2%" ANSI_BLUE " %3% %4% %5% %6%" ANSI_NORMAL,
+    out << fmt("%1%%2%" ANSI_BLUE " %3% %4% %5% %6%" ANSI_NORMAL,
                      prefix,
                      levelString,
                      "---",
@@ -115,32 +136,33 @@ void printErrorInfo(const ErrorInfo &einfo)
                            ? string(" ") + showErrPos(einfo.nixCode->errPos)
                            : "";
 
-            std::cout << fmt("%1%in file: " ANSI_BLUE "%2%%3%" ANSI_NORMAL,
+            out << fmt("%1%in file: " ANSI_BLUE "%2%%3%" ANSI_NORMAL,
                              prefix, 
                              einfo.nixCode->errPos.nixFile,
                              eline) << std::endl;
-            std::cout << prefix << std::endl;
+            out << prefix << std::endl;
         } else {
-            std::cout << fmt("%1%from command line argument", prefix) << std::endl;
-            std::cout << prefix << std::endl;
+            out << fmt("%1%from command line argument", prefix) << std::endl;
+            out << prefix << std::endl;
         }
     }
 
     // description
-    std::cout << prefix << einfo.description << std::endl;
-    std::cout << prefix << std::endl;
+    out << prefix << einfo.description << std::endl;
+    out << prefix << std::endl;
 
     // lines of code.
     if (einfo.nixCode->errLineOfCode != "") {
         printCodeLines(prefix, *einfo.nixCode);
-        std::cout << prefix << std::endl;
+        out << prefix << std::endl;
     }
 
     // hint
     if (einfo.hint.has_value()) {
-        std::cout << prefix << *einfo.hint << std::endl;
-        std::cout << prefix << std::endl;
+        out << prefix << *einfo.hint << std::endl;
+        out << prefix << std::endl;
     }
-}
 
+    return out;
+}
 }

src/libutil/error.hh

@@ -11,9 +11,14 @@ namespace nix
 {
 
 typedef enum {
-    elWarning,
-    elError
-} ErrLevel;
+    lvlError = 0,
+    lvlWarn,
+    lvlInfo,
+    lvlTalkative,
+    lvlChatty,
+    lvlDebug,
+    lvlVomit
+} Verbosity;
 
 struct ErrPos
 {
@@ -101,7 +106,7 @@ inline hintformat hintfmt(const std::string & fs, const Args & ... args)
 // ErrorInfo.
 struct ErrorInfo
 {
-    ErrLevel level;
+    Verbosity level;
     string name;
     string description;
     std::optional<hintformat> hint;
@@ -110,11 +115,7 @@ struct ErrorInfo
     static std::optional<string> programName;
 };
 
-// --------------------------------------------------------
-// error printing
-
-// just to cout for now.
-void printErrorInfo(const ErrorInfo &einfo);
+std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo);
 
 }
 

src/libutil/logging.cc

@@ -3,6 +3,7 @@
 
 #include <atomic>
 #include <nlohmann/json.hpp>
+#include <sstream>
 
 namespace nix {
 
@@ -57,6 +58,14 @@ public:
         writeToStderr(prefix + filterANSIEscapes(fs.s, !tty) + "\n");
     }
 
+    void logEI(const ErrorInfo & ei) override
+    {
+        std::stringstream oss; 
+        oss << ei;
+
+        log(ei.level, oss.str());
+    }
+
     void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
         const std::string & s, const Fields & fields, ActivityId parent)
         override
@@ -135,6 +144,15 @@ struct JSONLogger : Logger
         write(json);
     }
 
+    void logEI(const ErrorInfo & ei) override
+    {
+        // nlohmann::json json;
+        // json["action"] = "msg";
+        // json["level"] = lvl;
+        // json["msg"] = fs.s;
+        // write(json);
+    }
+
     void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
         const std::string & s, const Fields & fields, ActivityId parent) override
     {

src/libutil/logging.hh

@@ -1,19 +1,10 @@
 #pragma once
 
 #include "types.hh"
+#include "error.hh"
 
 namespace nix {
 
-typedef enum {
-    lvlError = 0,
-    lvlWarn,
-    lvlInfo,
-    lvlTalkative,
-    lvlChatty,
-    lvlDebug,
-    lvlVomit
-} Verbosity;
-
 typedef enum {
     actUnknown = 0,
     actCopyPath = 100,
@@ -70,6 +61,13 @@ public:
         log(lvlInfo, fs);
     }
 
+    virtual void logEI(const ErrorInfo &ei) = 0;
+
+    void logEI(Verbosity lvl, ErrorInfo ei) {
+      ei.level = lvl;
+      logEI(ei);
+    }
+
     virtual void warn(const std::string & msg);
 
     virtual void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
@@ -157,6 +155,18 @@ extern Verbosity verbosity; /* suppress msgs > this */
 #define debug(args...) printMsg(lvlDebug, args)
 #define vomit(args...) printMsg(lvlVomit, args)
 
+#define logErrorInfo(level, errorInfo...) \
+    do { \
+        if (level <= nix::verbosity) { \
+            logger->logEI(level, errorInfo); \
+        } \
+    } while (0)
+
+#define logError(errorInfo...) logErrorInfo(lvlError, errorInfo)
+#define logWarning(errorInfo...) logErrorInfo(lvlWarn, errorInfo)
+
+
+
 template<typename... Args>
 inline void warn(const std::string & fs, const Args & ... args)
 {

src/nix/progress-bar.cc

@@ -124,6 +124,12 @@ public:
         log(*state, lvl, fs.s);
     }
 
+    void logEI(const ErrorInfo &ei) override
+    {
+        auto state(state_.lock());
+        // log(*state, lvl, ei.as_str());
+    }
+
     void log(State & state, Verbosity lvl, const std::string & s)
     {
         if (state.active) {