Merge pull request #6608 from bburdette/ignore-try
--ignore-try flag for debugger mode
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commit
b6e90de0aa
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@ -58,6 +58,7 @@ struct CopyCommand : virtual StoreCommand
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struct EvalCommand : virtual StoreCommand, MixEvalArgs
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{
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bool startReplOnEvalErrors = false;
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bool ignoreExceptionsDuringTry = false;
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EvalCommand();
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@ -464,9 +464,10 @@ EvalState::EvalState(
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, emptyBindings(0)
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, store(store)
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, buildStore(buildStore ? buildStore : store)
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, debugRepl(0)
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, debugRepl(nullptr)
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, debugStop(false)
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, debugQuit(false)
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, trylevel(0)
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, regexCache(makeRegexCache())
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#if HAVE_BOEHMGC
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, valueAllocCache(std::allocate_shared<void *>(traceable_allocator<void *>(), nullptr))
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@ -832,7 +833,14 @@ void EvalState::runDebugRepl(const Error * error, const Env & env, const Expr &
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: nullptr;
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if (error)
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printError("%s\n\n" ANSI_BOLD "Starting REPL to allow you to inspect the current state of the evaluator.\n" ANSI_NORMAL, error->what());
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{
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printError("%s\n\n", error->what());
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if (trylevel > 0 && error->info().level != lvlInfo)
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printError("This exception occurred in a 'tryEval' call. Use " ANSI_GREEN "--ignore-try" ANSI_NORMAL " to skip these.\n");
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printError(ANSI_BOLD "Starting REPL to allow you to inspect the current state of the evaluator.\n" ANSI_NORMAL);
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}
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auto se = getStaticEnv(expr);
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if (se) {
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@ -130,6 +130,7 @@ public:
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void (* debugRepl)(ref<EvalState> es, const ValMap & extraEnv);
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bool debugStop;
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bool debugQuit;
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int trylevel;
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std::list<DebugTrace> debugTraces;
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std::map<const Expr*, const std::shared_ptr<const StaticEnv>> exprEnvs;
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const std::shared_ptr<const StaticEnv> getStaticEnv(const Expr & expr) const
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@ -647,6 +648,12 @@ struct EvalSettings : Config
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Setting<bool> useEvalCache{this, true, "eval-cache",
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"Whether to use the flake evaluation cache."};
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Setting<bool> ignoreExceptionsDuringTry{this, false, "ignore-try",
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R"(
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If set to true, ignore exceptions inside 'tryEval' calls when evaluating nix expressions in
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debug mode (using the --debugger flag). By default the debugger will pause on all exceptions.
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)"};
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Setting<bool> traceVerbose{this, false, "trace-verbose",
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"Whether `builtins.traceVerbose` should trace its first argument when evaluated."};
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};
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@ -851,6 +851,18 @@ static RegisterPrimOp primop_floor({
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static void prim_tryEval(EvalState & state, const PosIdx pos, Value * * args, Value & v)
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{
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auto attrs = state.buildBindings(2);
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/* increment state.trylevel, and decrement it when this function returns. */
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MaintainCount trylevel(state.trylevel);
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void (* savedDebugRepl)(ref<EvalState> es, const ValMap & extraEnv) = nullptr;
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if (state.debugRepl && evalSettings.ignoreExceptionsDuringTry)
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{
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/* to prevent starting the repl from exceptions withing a tryEval, null it. */
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savedDebugRepl = state.debugRepl;
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state.debugRepl = nullptr;
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}
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try {
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state.forceValue(*args[0], pos);
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attrs.insert(state.sValue, args[0]);
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@ -859,6 +871,11 @@ static void prim_tryEval(EvalState & state, const PosIdx pos, Value * * args, Va
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attrs.alloc(state.sValue).mkBool(false);
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attrs.alloc("success").mkBool(false);
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}
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// restore the debugRepl pointer if we saved it earlier.
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if (savedDebugRepl)
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state.debugRepl = savedDebugRepl;
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v.mkAttrs(attrs);
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}
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