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* Don't show trace information by default (`--show-trace' to enable).

Browse source 
NixOS evaluation errors in particular look intimidating and
  generally aren't very useful.  Ideally the builtins.throw messages
  should be self-contained.
This commit is contained in:
Eelco Dolstra 2009-06-30 13:28:29 +00:00
parent a2fc3a53ba
commit f2c3fc5191
6 changed files with 21 additions and 3 deletions
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9
src/libmain/shared.cc
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@ -125,6 +125,9 @@ RemoveTempRoots::~RemoveTempRoots()
}
static bool showTrace = false;
/* Initialize and reorder arguments, then call the actual argument
processor. */
static void initAndRun(int argc, char * * argv)
@ -243,6 +246,8 @@ static void initAndRun(int argc, char * * argv)
maxSilentTime = getIntArg(arg, i, args.end());
else if (arg == "--no-build-hook")
useBuildHook = false;
else if (arg == "--show-trace")
showTrace = true;
else if (arg == "--option") {
++i; if (i == args.end()) throw UsageError("`--option' requires two arguments");
string name = *i;
@ -365,7 +370,9 @@ int main(int argc, char * * argv)
% e.what() % programId);
return 1;
} catch (BaseError & e) {
printMsg(lvlError, format("error: %1%") % e.msg());
printMsg(lvlError, format("error: %1%%2%") % (showTrace ? e.prefix() : "") % e.msg());
if (e.prefix() != "" && !showTrace)
printMsg(lvlError, "(use `--show-trace' to show detailed location information)");
return 1;
} catch (std::exception & e) {
printMsg(lvlError, format("error: %1%") % e.what());