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in debugger mode, print the current error when another repl returns.

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This commit is contained in:
Ben Burdette 2022-04-07 12:09:47 -06:00
parent 50b52d5110
commit d2ec9b4e15
1 changed files with 32 additions and 24 deletions
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56
src/libcmd/repl.cc
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@ -203,6 +203,30 @@ namespace {
} }
} }
std::ostream& showDebugTrace(std::ostream &out, const DebugTrace &dt)
{
if (dt.is_error)
out << ANSI_RED "error: " << ANSI_NORMAL;
out << dt.hint.str() << "\n";
// prefer direct pos, but if noPos then try the expr.
auto pos = (*dt.pos ? *dt.pos :
(dt.expr.getPos() ? *dt.expr.getPos() : noPos));
if (pos) {
printAtPos(pos, out);
auto loc = getCodeLines(pos);
if (loc.has_value()) {
out << "\n";
printCodeLines(out, "", pos, *loc);
out << "\n";
}
}
return out;
}
void NixRepl::mainLoop(const std::vector<std::string> & files) void NixRepl::mainLoop(const std::vector<std::string> & files)
{ {
string error = ANSI_RED "error:" ANSI_NORMAL " "; string error = ANSI_RED "error:" ANSI_NORMAL " ";
@ -251,6 +275,14 @@ void NixRepl::mainLoop(const std::vector<std::string> & files)
} else { } else {
printMsg(lvlError, e.msg()); printMsg(lvlError, e.msg());
} }
} catch (EvalError & e) {
// in debugger mode, an EvalError should trigger another repl session.
// when that session returns the exception will land here. No need to show it again;
// show the error for this repl session instead.
if (debuggerHook && !this->state->debugTraces.empty())
showDebugTrace(std::cout, this->state->debugTraces.front());
else
printMsg(lvlError, e.msg());
} catch (Error & e) { } catch (Error & e) {
printMsg(lvlError, e.msg()); printMsg(lvlError, e.msg());
} catch (Interrupted & e) { } catch (Interrupted & e) {
@ -406,30 +438,6 @@ StorePath NixRepl::getDerivationPath(Value & v) {
return drvPath; return drvPath;
} }
std::ostream& showDebugTrace(std::ostream &out, const DebugTrace &dt)
{
if (dt.is_error)
out << ANSI_RED "error: " << ANSI_NORMAL;
out << dt.hint.str() << "\n";
// prefer direct pos, but if noPos then try the expr.
auto pos = (*dt.pos ? *dt.pos :
(dt.expr.getPos() ? *dt.expr.getPos() : noPos));
if (pos) {
printAtPos(pos, out);
auto loc = getCodeLines(pos);
if (loc.has_value()) {
out << "\n";
printCodeLines(out, "", pos, *loc);
out << "\n";
}
}
return out;
}
void NixRepl::loadDebugTraceEnv(DebugTrace &dt) void NixRepl::loadDebugTraceEnv(DebugTrace &dt)
{ {
if (dt.expr.staticenv) if (dt.expr.staticenv)