Improved logging abstraction

This also gets rid of --log-type, since the nested log type isn't
useful in a multi-threaded situation, and nobody cares about the
"pretty" log type.

3 files changed, 7 insertions, 8 deletions

diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 7ad9a4e46..5a6428ca6 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -641,7 +641,7 @@ void EvalState::evalFile(const Path & path, Value & v)
         return;
     }
 
-    startNest(nest, lvlTalkative, format("evaluating file ‘%1%’") % path2);
+    Activity act(*logger, lvlTalkative, format("evaluating file ‘%1%’") % path2);
     Expr * e = parseExprFromFile(checkSourcePath(path2));
     try {
         eval(e, v);
diff --git a/src/libexpr/get-drvs.cc b/src/libexpr/get-drvs.cc
index 4889fe206..b06c539de 100644
--- a/src/libexpr/get-drvs.cc
+++ b/src/libexpr/get-drvs.cc
@@ -290,7 +290,7 @@ static void getDerivations(EvalState & state, Value & vIn,
             attrs.insert(std::pair<string, Symbol>(i.name, i.name));
 
         for (auto & i : attrs) {
-            startNest(nest, lvlDebug, format("evaluating attribute ‘%1%’") % i.first);
+            Activity act(*logger, lvlDebug, format("evaluating attribute ‘%1%’") % i.first);
             string pathPrefix2 = addToPath(pathPrefix, i.first);
             Value & v2(*v.attrs->find(i.second)->value);
             if (combineChannels)
@@ -310,8 +310,7 @@ static void getDerivations(EvalState & state, Value & vIn,
 
     else if (v.isList()) {
         for (unsigned int n = 0; n < v.listSize(); ++n) {
-            startNest(nest, lvlDebug,
-                format("evaluating list element"));
+            Activity act(*logger, lvlDebug, "evaluating list element");
             string pathPrefix2 = addToPath(pathPrefix, (format("%1%") % n).str());
             if (getDerivation(state, *v.listElems()[n], pathPrefix2, drvs, done, ignoreAssertionFailures))
                 getDerivations(state, *v.listElems()[n], pathPrefix2, autoArgs, drvs, done, ignoreAssertionFailures);
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 51680ad62..c2852629a 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -124,7 +124,7 @@ static void prim_scopedImport(EvalState & state, const Pos & pos, Value * * args
                 env->values[displ++] = attr.value;
             }
 
-            startNest(nest, lvlTalkative, format("evaluating file ‘%1%’") % path);
+            Activity act(*logger, lvlTalkative, format("evaluating file ‘%1%’") % path);
             Expr * e = state.parseExprFromFile(resolveExprPath(path), staticEnv);
 
             e->eval(state, *env, v);
@@ -284,7 +284,7 @@ typedef list<Value *> ValueList;
 
 static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * args, Value & v)
 {
-    startNest(nest, lvlDebug, "finding dependencies");
+    Activity act(*logger, lvlDebug, "finding dependencies");
 
     state.forceAttrs(*args[0], pos);
 
@@ -457,7 +457,7 @@ void prim_valueSize(EvalState & state, const Pos & pos, Value * * args, Value &
    derivation. */
 static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * * args, Value & v)
 {
-    startNest(nest, lvlVomit, "evaluating derivation");
+    Activity act(*logger, lvlVomit, "evaluating derivation");
 
     state.forceAttrs(*args[0], pos);
 
@@ -494,7 +494,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
     for (auto & i : *args[0]->attrs) {
         if (i.name == state.sIgnoreNulls) continue;
         string key = i.name;
-        startNest(nest, lvlVomit, format("processing attribute ‘%1%’") % key);
+        Activity act(*logger, lvlVomit, format("processing attribute ‘%1%’") % key);
 
         try {