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Merge branch 'add-trace' of https://github.com/bburdette/nix

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This commit is contained in:
Eelco Dolstra 2020-07-03 16:27:39 +02:00
parent c3c7aedbb5 b29a4ea1dc
commit 14227aeb32
29 changed files with 517 additions and 242 deletions
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2
src/libexpr/attr-path.cc
View file

@ -130,7 +130,7 @@ Pos findDerivationFilename(EvalState & state, Value & v, std::string what)
Symbol file = state.symbols.create(filename);
return { file, lineno, 0 };
return { foFile, file, lineno, 0 };
}

2
src/libexpr/attr-set.hh
View file

@ -78,7 +78,7 @@ public:
if (!a)
throw Error({
.hint = hintfmt("attribute '%s' missing", name),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
return *a;

4
src/libexpr/eval-inline.hh
View file

@ -11,7 +11,7 @@ LocalNoInlineNoReturn(void throwEvalError(const Pos & pos, const char * s))
{
throw EvalError({
.hint = hintfmt(s),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -25,7 +25,7 @@ LocalNoInlineNoReturn(void throwTypeError(const Pos & pos, const char * s, const
{
throw TypeError({
.hint = hintfmt(s, showType(v)),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}

45
src/libexpr/eval.cc
View file

@ -529,7 +529,7 @@ LocalNoInlineNoReturn(void throwEvalError(const Pos & pos, const char * s, const
{
throw EvalError({
.hint = hintfmt(s, s2),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -542,7 +542,7 @@ LocalNoInlineNoReturn(void throwEvalError(const Pos & pos, const char * s, const
{
throw EvalError({
.hint = hintfmt(s, s2, s3),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -551,7 +551,7 @@ LocalNoInlineNoReturn(void throwEvalError(const Pos & p1, const char * s, const
// p1 is where the error occurred; p2 is a position mentioned in the message.
throw EvalError({
.hint = hintfmt(s, sym, p2),
.nixCode = NixCode { .errPos = p1 }
.errPos = p1
});
}
@ -559,7 +559,7 @@ LocalNoInlineNoReturn(void throwTypeError(const Pos & pos, const char * s))
{
throw TypeError({
.hint = hintfmt(s),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -572,7 +572,7 @@ LocalNoInlineNoReturn(void throwTypeError(const Pos & pos, const char * s, const
{
throw TypeError({
.hint = hintfmt(s, fun.showNamePos(), s2),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -580,7 +580,7 @@ LocalNoInlineNoReturn(void throwAssertionError(const Pos & pos, const char * s,
{
throw AssertionError({
.hint = hintfmt(s, s1),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -588,23 +588,18 @@ LocalNoInlineNoReturn(void throwUndefinedVarError(const Pos & pos, const char *
{
throw UndefinedVarError({
.hint = hintfmt(s, s1),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
LocalNoInline(void addErrorPrefix(Error & e, const char * s, const string & s2))
LocalNoInline(void addErrorTrace(Error & e, const char * s, const string & s2))
{
e.addPrefix(format(s) % s2);
e.addTrace(std::nullopt, s, s2);
}
LocalNoInline(void addErrorPrefix(Error & e, const char * s, const ExprLambda & fun, const Pos & pos))
LocalNoInline(void addErrorTrace(Error & e, const Pos & pos, const char * s, const string & s2))
{
e.addPrefix(format(s) % fun.showNamePos() % pos);
}
LocalNoInline(void addErrorPrefix(Error & e, const char * s, const string & s2, const Pos & pos))
{
e.addPrefix(format(s) % s2 % pos);
e.addTrace(pos, s, s2);
}
@ -818,7 +813,7 @@ void EvalState::evalFile(const Path & path_, Value & v)
try {
eval(e, v);
} catch (Error & e) {
addErrorPrefix(e, "while evaluating the file '%1%':\n", path2);
addErrorTrace(e, "while evaluating the file '%1%':", path2);
throw;
}
@ -1068,8 +1063,8 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
} catch (Error & e) {
if (pos2 && pos2->file != state.sDerivationNix)
addErrorPrefix(e, "while evaluating the attribute '%1%' at %2%:\n",
showAttrPath(state, env, attrPath), *pos2);
addErrorTrace(e, *pos2, "while evaluating the attribute '%1%'",
showAttrPath(state, env, attrPath));
throw;
}
@ -1237,11 +1232,15 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v, const Pos & po
/* Evaluate the body. This is conditional on showTrace, because
catching exceptions makes this function not tail-recursive. */
if (settings.showTrace)
if (loggerSettings.showTrace.get())
try {
lambda.body->eval(*this, env2, v);
} catch (Error & e) {
addErrorPrefix(e, "while evaluating %1%, called from %2%:\n", lambda, pos);
addErrorTrace(e, lambda.pos, "while evaluating %s",
(lambda.name.set()
? "'" + (string) lambda.name + "'"
: "anonymous lambdaction"));
addErrorTrace(e, pos, "from call site%s", "");
throw;
}
else
@ -1516,7 +1515,7 @@ void EvalState::forceValueDeep(Value & v)
try {
recurse(*i.value);
} catch (Error & e) {
addErrorPrefix(e, "while evaluating the attribute '%1%' at %2%:\n", i.name, *i.pos);
addErrorTrace(e, *i.pos, "while evaluating the attribute '%1%'", i.name);
throw;
}
}
@ -1936,7 +1935,7 @@ string ExternalValueBase::coerceToString(const Pos & pos, PathSet & context, boo
{
throw TypeError({
.hint = hintfmt("cannot coerce %1% to a string", showType()),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}

2
src/libexpr/eval.hh
View file

@ -250,7 +250,7 @@ private:
friend struct ExprAttrs;
friend struct ExprLet;
Expr * parse(const char * text, const Path & path,
Expr * parse(const char * text, FileOrigin origin, const Path & path,
const Path & basePath, StaticEnv & staticEnv);
public:

19
src/libexpr/nixexpr.cc
View file

@ -197,7 +197,22 @@ std::ostream & operator << (std::ostream & str, const Pos & pos)
if (!pos)
str << "undefined position";
else
str << (format(ANSI_BOLD "%1%" ANSI_NORMAL ":%2%:%3%") % (string) pos.file % pos.line % pos.column).str();
{
auto f = format(ANSI_BOLD "%1%" ANSI_NORMAL ":%2%:%3%");
switch (pos.origin) {
case foFile:
f % (string) pos.file;
break;
case foStdin:
case foString:
f % "(string)";
break;
default:
throw Error("unhandled Pos origin!");
}
str << (f % pos.line % pos.column).str();
}
return str;
}
@ -270,7 +285,7 @@ void ExprVar::bindVars(const StaticEnv & env)
if (withLevel == -1)
throw UndefinedVarError({
.hint = hintfmt("undefined variable '%1%'", name),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
fromWith = true;
this->level = withLevel;

9
src/libexpr/nixexpr.hh
View file

@ -24,11 +24,12 @@ MakeError(RestrictedPathError, Error);
struct Pos
{
FileOrigin origin;
Symbol file;
unsigned int line, column;
Pos() : line(0), column(0) { };
Pos(const Symbol & file, unsigned int line, unsigned int column)
: file(file), line(line), column(column) { };
Pos() : origin(foString), line(0), column(0) { };
Pos(FileOrigin origin, const Symbol & file, unsigned int line, unsigned int column)
: origin(origin), file(file), line(line), column(column) { };
operator bool() const
{
return line != 0;
@ -238,7 +239,7 @@ struct ExprLambda : Expr
if (!arg.empty() && formals && formals->argNames.find(arg) != formals->argNames.end())
throw ParseError({
.hint = hintfmt("duplicate formal function argument '%1%'", arg),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
};
void setName(Symbol & name);

45
src/libexpr/parser.y
View file

@ -30,7 +30,8 @@ namespace nix {
SymbolTable & symbols;
Expr * result;
Path basePath;
Symbol path;
Symbol file;
FileOrigin origin;
ErrorInfo error;
Symbol sLetBody;
ParseData(EvalState & state)
@ -65,18 +66,17 @@ namespace nix {
static void dupAttr(const AttrPath & attrPath, const Pos & pos, const Pos & prevPos)
{
throw ParseError({
.hint = hintfmt("attribute '%1%' already defined at %2%",
.hint = hintfmt("attribute '%1%' already defined at %2%",
showAttrPath(attrPath), prevPos),
.nixCode = NixCode { .errPos = pos },
.errPos = pos
});
}
static void dupAttr(Symbol attr, const Pos & pos, const Pos & prevPos)
{
throw ParseError({
.hint = hintfmt("attribute '%1%' already defined at %2%", attr, prevPos),
.nixCode = NixCode { .errPos = pos },
.errPos = pos
});
}
@ -148,7 +148,7 @@ static void addFormal(const Pos & pos, Formals * formals, const Formal & formal)
throw ParseError({
.hint = hintfmt("duplicate formal function argument '%1%'",
formal.name),
.nixCode = NixCode { .errPos = pos },
.errPos = pos
});
formals->formals.push_front(formal);
}
@ -246,7 +246,7 @@ static Expr * stripIndentation(const Pos & pos, SymbolTable & symbols, vector<Ex
static inline Pos makeCurPos(const YYLTYPE & loc, ParseData * data)
{
return Pos(data->path, loc.first_line, loc.first_column);
return Pos(data->origin, data->file, loc.first_line, loc.first_column);
}
#define CUR_POS makeCurPos(*yylocp, data)
@ -259,7 +259,7 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, ParseData * data, const char * err
{
data->error = {
.hint = hintfmt(error),
.nixCode = NixCode { .errPos = makeCurPos(*loc, data) }
.errPos = makeCurPos(*loc, data)
};
}
@ -339,7 +339,7 @@ expr_function
{ if (!$2->dynamicAttrs.empty())
throw ParseError({
.hint = hintfmt("dynamic attributes not allowed in let"),
.nixCode = NixCode { .errPos = CUR_POS },
.errPos = CUR_POS
});
$$ = new ExprLet($2, $4);
}
@ -419,7 +419,7 @@ expr_simple
if (noURLLiterals)
throw ParseError({
.hint = hintfmt("URL literals are disabled"),
.nixCode = NixCode { .errPos = CUR_POS }
.errPos = CUR_POS
});
$$ = new ExprString(data->symbols.create($1));
}
@ -492,7 +492,7 @@ attrs
} else
throw ParseError({
.hint = hintfmt("dynamic attributes not allowed in inherit"),
.nixCode = NixCode { .errPos = makeCurPos(@2, data) },
.errPos = makeCurPos(@2, data)
});
}
| { $$ = new AttrPath; }
@ -569,13 +569,24 @@ formal
namespace nix {
Expr * EvalState::parse(const char * text,
Expr * EvalState::parse(const char * text, FileOrigin origin,
const Path & path, const Path & basePath, StaticEnv & staticEnv)
{
yyscan_t scanner;
ParseData data(*this);
data.origin = origin;
switch (origin) {
case foFile:
data.file = data.symbols.create(path);
break;
case foStdin:
case foString:
data.file = data.symbols.create(text);
break;
default:
assert(false);
}
data.basePath = basePath;
data.path = data.symbols.create(path);
yylex_init(&scanner);
yy_scan_string(text, scanner);
@ -625,13 +636,13 @@ Expr * EvalState::parseExprFromFile(const Path & path)
Expr * EvalState::parseExprFromFile(const Path & path, StaticEnv & staticEnv)
{
return parse(readFile(path).c_str(), path, dirOf(path), staticEnv);
return parse(readFile(path).c_str(), foFile, path, dirOf(path), staticEnv);
}
Expr * EvalState::parseExprFromString(std::string_view s, const Path & basePath, StaticEnv & staticEnv)
{
return parse(s.data(), "(string)", basePath, staticEnv);
return parse(s.data(), foString, "", basePath, staticEnv);
}
@ -644,7 +655,7 @@ Expr * EvalState::parseExprFromString(std::string_view s, const Path & basePath)
Expr * EvalState::parseStdin()
{
//Activity act(*logger, lvlTalkative, format("parsing standard input"));
return parseExprFromString(drainFD(0), absPath("."));
return parse(drainFD(0).data(), foStdin, "", absPath("."), staticBaseEnv);
}
@ -693,7 +704,7 @@ Path EvalState::findFile(SearchPath & searchPath, const string & path, const Pos
? "cannot look up '<%s>' in pure evaluation mode (use '--impure' to override)"
: "file '%s' was not found in the Nix search path (add it using $NIX_PATH or -I)",
path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}

103
src/libexpr/primops.cc
View file

@ -96,7 +96,7 @@ static void prim_scopedImport(EvalState & state, const Pos & pos, Value * * args
} catch (InvalidPathError & e) {
throw EvalError({
.hint = hintfmt("cannot import '%1%', since path '%2%' is not valid", path, e.path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -177,7 +177,7 @@ void prim_importNative(EvalState & state, const Pos & pos, Value * * args, Value
.hint = hintfmt(
"cannot import '%1%', since path '%2%' is not valid",
path, e.path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -215,7 +215,7 @@ void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v)
if (count == 0) {
throw EvalError({
.hint = hintfmt("at least one argument to 'exec' required"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
PathSet context;
@ -230,7 +230,7 @@ void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v)
throw EvalError({
.hint = hintfmt("cannot execute '%1%', since path '%2%' is not valid",
program, e.path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -239,13 +239,13 @@ void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v)
try {
parsed = state.parseExprFromString(output, pos.file);
} catch (Error & e) {
e.addPrefix(fmt("While parsing the output from '%1%', at %2%\n", program, pos));
e.addTrace(pos, "While parsing the output from '%1%'", program);
throw;
}
try {
state.eval(parsed, v);
} catch (Error & e) {
e.addPrefix(fmt("While evaluating the output from '%1%', at %2%\n", program, pos));
e.addTrace(pos, "While evaluating the output from '%1%'", program);
throw;
}
}
@ -385,7 +385,7 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
if (startSet == args[0]->attrs->end())
throw EvalError({
.hint = hintfmt("attribute 'startSet' required"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
state.forceList(*startSet->value, pos);
@ -399,7 +399,7 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
if (op == args[0]->attrs->end())
throw EvalError({
.hint = hintfmt("attribute 'operator' required"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
state.forceValue(*op->value, pos);
@ -421,7 +421,7 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
if (key == e->attrs->end())
throw EvalError({
.hint = hintfmt("attribute 'key' required"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
state.forceValue(*key->value, pos);
@ -471,7 +471,7 @@ static void prim_addErrorContext(EvalState & state, const Pos & pos, Value * * a
v = *args[1];
} catch (Error & e) {
PathSet context;
e.addPrefix(format("%1%\n") % state.coerceToString(pos, *args[0], context));
e.addTrace(std::nullopt, state.coerceToString(pos, *args[0], context));
throw;
}
}
@ -556,14 +556,14 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
if (attr == args[0]->attrs->end())
throw EvalError({
.hint = hintfmt("required attribute 'name' missing"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
string drvName;
Pos & posDrvName(*attr->pos);
try {
drvName = state.forceStringNoCtx(*attr->value, pos);
} catch (Error & e) {
e.addPrefix(fmt("while evaluating the derivation attribute 'name' at %1%:\n", posDrvName));
e.addTrace(posDrvName, "while evaluating the derivation attribute 'name'");
throw;
}
@ -603,7 +603,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
else
throw EvalError({
.hint = hintfmt("invalid value '%s' for 'outputHashMode' attribute", s),
.nixCode = NixCode { .errPos = posDrvName }
.errPos = posDrvName
});
};
@ -613,7 +613,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
if (outputs.find(j) != outputs.end())
throw EvalError({
.hint = hintfmt("duplicate derivation output '%1%'", j),
.nixCode = NixCode { .errPos = posDrvName }
.errPos = posDrvName
});
/* !!! Check whether j is a valid attribute
name. */
@ -623,14 +623,14 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
if (j == "drv")
throw EvalError({
.hint = hintfmt("invalid derivation output name 'drv'" ),
.nixCode = NixCode { .errPos = posDrvName }
.errPos = posDrvName
});
outputs.insert(j);
}
if (outputs.empty())
throw EvalError({
.hint = hintfmt("derivation cannot have an empty set of outputs"),
.nixCode = NixCode { .errPos = posDrvName }
.errPos = posDrvName
});
};
@ -696,8 +696,9 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
}
} catch (Error & e) {
e.addPrefix(format("while evaluating the attribute '%1%' of the derivation '%2%' at %3%:\n")
% key % drvName % posDrvName);
e.addTrace(posDrvName,
"while evaluating the attribute '%1%' of the derivation '%2%'",
key, drvName);
throw;
}
}
@ -745,20 +746,20 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
if (drv.builder == "")
throw EvalError({
.hint = hintfmt("required attribute 'builder' missing"),
.nixCode = NixCode { .errPos = posDrvName }
.errPos = posDrvName
});
if (drv.platform == "")
throw EvalError({
.hint = hintfmt("required attribute 'system' missing"),
.nixCode = NixCode { .errPos = posDrvName }
.errPos = posDrvName
});
/* Check whether the derivation name is valid. */
if (isDerivation(drvName))
throw EvalError({
.hint = hintfmt("derivation names are not allowed to end in '%s'", drvExtension),
.nixCode = NixCode { .errPos = posDrvName }
.errPos = posDrvName
});
if (outputHash) {
@ -766,7 +767,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
if (outputs.size() != 1 || *(outputs.begin()) != "out")
throw Error({
.hint = hintfmt("multiple outputs are not supported in fixed-output derivations"),
.nixCode = NixCode { .errPos = posDrvName }
.errPos = posDrvName
});
std::optional<HashType> ht = parseHashTypeOpt(outputHashAlgo);
@ -880,7 +881,7 @@ static void prim_storePath(EvalState & state, const Pos & pos, Value * * args, V
if (!state.store->isInStore(path))
throw EvalError({
.hint = hintfmt("path '%1%' is not in the Nix store", path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
Path path2 = state.store->toStorePath(path);
if (!settings.readOnlyMode)
@ -901,7 +902,7 @@ static void prim_pathExists(EvalState & state, const Pos & pos, Value * * args,
.hint = hintfmt(
"cannot check the existence of '%1%', since path '%2%' is not valid",
path, e.path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -947,7 +948,7 @@ static void prim_readFile(EvalState & state, const Pos & pos, Value * * args, Va
} catch (InvalidPathError & e) {
throw EvalError({
.hint = hintfmt("cannot read '%1%', since path '%2%' is not valid", path, e.path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
string s = readFile(state.checkSourcePath(state.toRealPath(path, context)));
@ -978,7 +979,7 @@ static void prim_findFile(EvalState & state, const Pos & pos, Value * * args, Va
if (i == v2.attrs->end())
throw EvalError({
.hint = hintfmt("attribute 'path' missing"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
PathSet context;
@ -989,7 +990,7 @@ static void prim_findFile(EvalState & state, const Pos & pos, Value * * args, Va
} catch (InvalidPathError & e) {
throw EvalError({
.hint = hintfmt("cannot find '%1%', since path '%2%' is not valid", path, e.path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -1009,7 +1010,7 @@ static void prim_hashFile(EvalState & state, const Pos & pos, Value * * args, Va
if (!ht)
throw Error({
.hint = hintfmt("unknown hash type '%1%'", type),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
PathSet context; // discarded
@ -1028,7 +1029,7 @@ static void prim_readDir(EvalState & state, const Pos & pos, Value * * args, Val
} catch (InvalidPathError & e) {
throw EvalError({
.hint = hintfmt("cannot read '%1%', since path '%2%' is not valid", path, e.path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
@ -1104,7 +1105,7 @@ static void prim_toFile(EvalState & state, const Pos & pos, Value * * args, Valu
"in 'toFile': the file named '%1%' must not contain a reference "
"to a derivation but contains (%2%)",
name, path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
refs.insert(state.store->parseStorePath(path));
}
@ -1175,7 +1176,7 @@ static void prim_filterSource(EvalState & state, const Pos & pos, Value * * args
if (!context.empty())
throw EvalError({
.hint = hintfmt("string '%1%' cannot refer to other paths", path),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
state.forceValue(*args[0], pos);
@ -1184,7 +1185,7 @@ static void prim_filterSource(EvalState & state, const Pos & pos, Value * * args
.hint = hintfmt(
"first argument in call to 'filterSource' is not a function but %1%",
showType(*args[0])),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
addPath(state, pos, std::string(baseNameOf(path)), path, args[0], FileIngestionMethod::Recursive, Hash(), v);
@ -1207,7 +1208,7 @@ static void prim_path(EvalState & state, const Pos & pos, Value * * args, Value
if (!context.empty())
throw EvalError({
.hint = hintfmt("string '%1%' cannot refer to other paths", path),
.nixCode = NixCode { .errPos = *attr.pos }
.errPos = *attr.pos
});
} else if (attr.name == state.sName)
name = state.forceStringNoCtx(*attr.value, *attr.pos);
@ -1221,13 +1222,13 @@ static void prim_path(EvalState & state, const Pos & pos, Value * * args, Value
else
throw EvalError({
.hint = hintfmt("unsupported argument '%1%' to 'addPath'", attr.name),
.nixCode = NixCode { .errPos = *attr.pos }
.errPos = *attr.pos
});
}
if (path.empty())
throw EvalError({
.hint = hintfmt("'path' required"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
if (name.empty())
name = baseNameOf(path);
@ -1288,7 +1289,7 @@ void prim_getAttr(EvalState & state, const Pos & pos, Value * * args, Value & v)
if (i == args[1]->attrs->end())
throw EvalError({
.hint = hintfmt("attribute '%1%' missing", attr),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
// !!! add to stack trace?
if (state.countCalls && i->pos) state.attrSelects[*i->pos]++;
@ -1371,7 +1372,7 @@ static void prim_listToAttrs(EvalState & state, const Pos & pos, Value * * args,
if (j == v2.attrs->end())
throw TypeError({
.hint = hintfmt("'name' attribute missing in a call to 'listToAttrs'"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
string name = state.forceStringNoCtx(*j->value, pos);
@ -1381,7 +1382,7 @@ static void prim_listToAttrs(EvalState & state, const Pos & pos, Value * * args,
if (j2 == v2.attrs->end())
throw TypeError({
.hint = hintfmt("'value' attribute missing in a call to 'listToAttrs'"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
v.attrs->push_back(Attr(sym, j2->value, j2->pos));
}
@ -1457,7 +1458,7 @@ static void prim_functionArgs(EvalState & state, const Pos & pos, Value * * args
if (args[0]->type != tLambda)
throw TypeError({
.hint = hintfmt("'functionArgs' requires a function"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
if (!args[0]->lambda.fun->matchAttrs) {
@ -1513,7 +1514,7 @@ static void elemAt(EvalState & state, const Pos & pos, Value & list, int n, Valu
if (n < 0 || (unsigned int) n >= list.listSize())
throw Error({
.hint = hintfmt("list index %1% is out of bounds", n),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
state.forceValue(*list.listElems()[n], pos);
v = *list.listElems()[n];
@ -1543,7 +1544,7 @@ static void prim_tail(EvalState & state, const Pos & pos, Value * * args, Value
if (args[0]->listSize() == 0)
throw Error({
.hint = hintfmt("'tail' called on an empty list"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
state.mkList(v, args[0]->listSize() - 1);
@ -1688,7 +1689,7 @@ static void prim_genList(EvalState & state, const Pos & pos, Value * * args, Val
if (len < 0)
throw EvalError({
.hint = hintfmt("cannot create list of size %1%", len),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
state.mkList(v, len);
@ -1850,7 +1851,7 @@ static void prim_div(EvalState & state, const Pos & pos, Value * * args, Value &
if (f2 == 0)
throw EvalError({
.hint = hintfmt("division by zero"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
if (args[0]->type == tFloat || args[1]->type == tFloat) {
@ -1862,7 +1863,7 @@ static void prim_div(EvalState & state, const Pos & pos, Value * * args, Value &
if (i1 == std::numeric_limits<NixInt>::min() && i2 == -1)
throw EvalError({
.hint = hintfmt("overflow in integer division"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
mkInt(v, i1 / i2);
@ -1923,7 +1924,7 @@ static void prim_substring(EvalState & state, const Pos & pos, Value * * args, V
if (start < 0)
throw EvalError({
.hint = hintfmt("negative start position in 'substring'"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
mkString(v, (unsigned int) start >= s.size() ? "" : string(s, start, len), context);
@ -1946,7 +1947,7 @@ static void prim_hashString(EvalState & state, const Pos & pos, Value * * args,
if (!ht)
throw Error({
.hint = hintfmt("unknown hash type '%1%'", type),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
PathSet context; // discarded
@ -1992,12 +1993,12 @@ void prim_match(EvalState & state, const Pos & pos, Value * * args, Value & v)
// limit is _GLIBCXX_REGEX_STATE_LIMIT for libstdc++
throw EvalError({
.hint = hintfmt("memory limit exceeded by regular expression '%s'", re),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
} else {
throw EvalError({
.hint = hintfmt("invalid regular expression '%s'", re),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
}
@ -2065,12 +2066,12 @@ static void prim_split(EvalState & state, const Pos & pos, Value * * args, Value
// limit is _GLIBCXX_REGEX_STATE_LIMIT for libstdc++
throw EvalError({
.hint = hintfmt("memory limit exceeded by regular expression '%s'", re),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
} else {
throw EvalError({
.hint = hintfmt("invalid regular expression '%s'", re),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
}
@ -2104,7 +2105,7 @@ static void prim_replaceStrings(EvalState & state, const Pos & pos, Value * * ar
if (args[0]->listSize() != args[1]->listSize())
throw EvalError({
.hint = hintfmt("'from' and 'to' arguments to 'replaceStrings' have different lengths"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
vector<string> from;

6
src/libexpr/primops/context.cc
View file

@ -148,7 +148,7 @@ static void prim_appendContext(EvalState & state, const Pos & pos, Value * * arg
if (!state.store->isStorePath(i.name))
throw EvalError({
.hint = hintfmt("Context key '%s' is not a store path", i.name),
.nixCode = NixCode { .errPos = *i.pos }
.errPos = *i.pos
});
if (!settings.readOnlyMode)
state.store->ensurePath(state.store->parseStorePath(i.name));
@ -165,7 +165,7 @@ static void prim_appendContext(EvalState & state, const Pos & pos, Value * * arg
if (!isDerivation(i.name)) {
throw EvalError({
.hint = hintfmt("Tried to add all-outputs context of %s, which is not a derivation, to a string", i.name),
.nixCode = NixCode { .errPos = *i.pos }
.errPos = *i.pos
});
}
context.insert("=" + string(i.name));
@ -178,7 +178,7 @@ static void prim_appendContext(EvalState & state, const Pos & pos, Value * * arg
if (iter->value->listSize() && !isDerivation(i.name)) {
throw EvalError({
.hint = hintfmt("Tried to add derivation output context of %s, which is not a derivation, to a string", i.name),
.nixCode = NixCode { .errPos = *i.pos }
.errPos = *i.pos
});
}
for (unsigned int n = 0; n < iter->value->listSize(); ++n) {

4
src/libexpr/primops/fetchGit.cc
View file

@ -37,14 +37,14 @@ static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Va
else
throw EvalError({
.hint = hintfmt("unsupported argument '%s' to 'fetchGit'", attr.name),
.nixCode = NixCode { .errPos = *attr.pos }
.errPos = *attr.pos
});
}
if (url.empty())
throw EvalError({
.hint = hintfmt("'url' argument required"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
} else

4
src/libexpr/primops/fetchMercurial.cc
View file

@ -40,14 +40,14 @@ static void prim_fetchMercurial(EvalState & state, const Pos & pos, Value * * ar
else
throw EvalError({
.hint = hintfmt("unsupported argument '%s' to 'fetchMercurial'", attr.name),
.nixCode = NixCode { .errPos = *attr.pos }
.errPos = *attr.pos
});
}
if (url.empty())
throw EvalError({
.hint = hintfmt("'url' argument required"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
} else

6
src/libexpr/primops/fetchTree.cc
View file

@ -68,7 +68,7 @@ static void prim_fetchTree(EvalState & state, const Pos & pos, Value * * args, V
if (!attrs.count("type"))
throw Error({
.hint = hintfmt("attribute 'type' is missing in call to 'fetchTree'"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
input = fetchers::inputFromAttrs(attrs);
@ -112,14 +112,14 @@ static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
else
throw EvalError({
.hint = hintfmt("unsupported argument '%s' to '%s'", attr.name, who),
.nixCode = NixCode { .errPos = *attr.pos }
.errPos = *attr.pos
});
}
if (!url)
throw EvalError({
.hint = hintfmt("'url' argument required"),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
} else
url = state.forceStringNoCtx(*args[0], pos);

2
src/libexpr/primops/fromTOML.cc
View file

@ -83,7 +83,7 @@ static void prim_fromTOML(EvalState & state, const Pos & pos, Value * * args, Va
} catch (std::runtime_error & e) {
throw EvalError({
.hint = hintfmt("while parsing a TOML string: %s", e.what()),
.nixCode = NixCode { .errPos = pos }
.errPos = pos
});
}
}

2
src/libmain/loggers.cc
View file

@ -26,7 +26,7 @@ Logger * makeDefaultLogger() {
case LogFormat::rawWithLogs:
return makeSimpleLogger(true);
case LogFormat::internalJson:
return makeJSONLogger(*makeSimpleLogger());
return makeJSONLogger(*makeSimpleLogger(true));
case LogFormat::bar:
return makeProgressBar();
case LogFormat::barWithLogs:

2
src/libmain/progress-bar.cc
View file

@ -131,7 +131,7 @@ public:
auto state(state_.lock());
std::stringstream oss;
oss << ei;
showErrorInfo(oss, ei, loggerSettings.showTrace.get());
log(*state, ei.level, oss.str());
}

4
src/libmain/shared.cc
View file

@ -323,10 +323,8 @@ int handleExceptions(const string & programName, std::function<void()> fun)
printError("Try '%1% --help' for more information.", programName);
return 1;
} catch (BaseError & e) {
if (settings.showTrace && e.prefix() != "")
printError(e.prefix());
logError(e.info());
if (e.prefix() != "" && !settings.showTrace)
if (e.hasTrace() && !loggerSettings.showTrace.get())
printError("(use '--show-trace' to show detailed location information)");
return e.status;
} catch (std::bad_alloc & e) {

4
src/libstore/daemon.cc
View file

@ -78,10 +78,10 @@ struct TunnelLogger : public Logger
if (ei.level > verbosity) return;
std::stringstream oss;
oss << ei;
showErrorInfo(oss, ei, false);
StringSink buf;
buf << STDERR_NEXT << oss.str() << "\n"; // (fs.s + "\n");
buf << STDERR_NEXT << oss.str() << "\n";
enqueueMsg(*buf.s);
}

4
src/libstore/globals.hh
View file

@ -196,10 +196,6 @@ public:
/* Whether to lock the Nix client and worker to the same CPU. */
bool lockCPU;
/* Whether to show a stack trace if Nix evaluation fails. */
Setting<bool> showTrace{this, false, "show-trace",
"Whether to show a stack trace on evaluation errors."};
Setting<SandboxMode> sandboxMode{this,
#if __linux__
smEnabled

3
src/libstore/remote-store.cc
View file

@ -8,6 +8,7 @@
#include "derivations.hh"
#include "pool.hh"
#include "finally.hh"
#include "logging.hh"
#include <sys/types.h>
#include <sys/stat.h>
@ -220,7 +221,7 @@ void RemoteStore::setOptions(Connection & conn)
overrides.erase(settings.maxSilentTime.name);
overrides.erase(settings.buildCores.name);
overrides.erase(settings.useSubstitutes.name);
overrides.erase(settings.showTrace.name);
overrides.erase(loggerSettings.showTrace.name);
conn.to << overrides.size();
for (auto & i : overrides)
conn.to << i.first << i.second.value;

251
src/libutil/error.cc
View file

@ -7,14 +7,11 @@
namespace nix {
const std::string nativeSystem = SYSTEM;
// addPrefix is used for show-trace. Strings added with addPrefix
// will print ahead of the error itself.
BaseError & BaseError::addPrefix(const FormatOrString & fs)
BaseError & BaseError::addTrace(std::optional<ErrPos> e, hintformat hint)
{
prefix_ = fs.s + prefix_;
err.traces.push_front(Trace { .pos = e, .hint = hint});
return *this;
}
@ -28,7 +25,7 @@ const string& BaseError::calcWhat() const
err.name = sname();
std::ostringstream oss;
oss << err;
showErrorInfo(oss, err, false);
what_ = oss.str();
return *what_;
@ -56,28 +53,114 @@ string showErrPos(const ErrPos &errPos)
}
}
// if nixCode contains lines of code, print them to the ostream, indicating the error column.
void printCodeLines(std::ostream &out, const string &prefix, const NixCode &nixCode)
std::optional<LinesOfCode> getCodeLines(const ErrPos &errPos)
{
if (errPos.line <= 0)
return std::nullopt;
if (errPos.origin == foFile) {
LinesOfCode loc;
try {
AutoCloseFD fd = open(errPos.file.c_str(), O_RDONLY | O_CLOEXEC);
if (!fd) {
logError(SysError("opening file '%1%'", errPos.file).info());
return std::nullopt;
}
else
{
// count the newlines.
int count = 0;
string line;
int pl = errPos.line - 1;
do
{
line = readLine(fd.get());
++count;
if (count < pl)
{
;
}
else if (count == pl) {
loc.prevLineOfCode = line;
} else if (count == pl + 1) {
loc.errLineOfCode = line;
} else if (count == pl + 2) {
loc.nextLineOfCode = line;
break;
}
} while (true);
return loc;
}
}
catch (EndOfFile &eof) {
if (loc.errLineOfCode.has_value())
return loc;
else
return std::nullopt;
}
catch (std::exception &e) {
printError("error reading nix file: %s\n%s", errPos.file, e.what());
return std::nullopt;
}
} else {
std::istringstream iss(errPos.file);
// count the newlines.
int count = 0;
string line;
int pl = errPos.line - 1;
LinesOfCode loc;
do
{
std::getline(iss, line);
++count;
if (count < pl)
{
;
}
else if (count == pl) {
loc.prevLineOfCode = line;
} else if (count == pl + 1) {
loc.errLineOfCode = line;
} else if (count == pl + 2) {
loc.nextLineOfCode = line;
break;
}
if (!iss.good())
break;
} while (true);
return loc;
}
}
// print lines of code to the ostream, indicating the error column.
void printCodeLines(std::ostream &out,
const string &prefix,
const ErrPos &errPos,
const LinesOfCode &loc)
{
// previous line of code.
if (nixCode.prevLineOfCode.has_value()) {
if (loc.prevLineOfCode.has_value()) {
out << std::endl
<< fmt("%1% %|2$5d|| %3%",
prefix,
(nixCode.errPos.line - 1),
*nixCode.prevLineOfCode);
prefix,
(errPos.line - 1),
*loc.prevLineOfCode);
}
if (nixCode.errLineOfCode.has_value()) {
if (loc.errLineOfCode.has_value()) {
// line of code containing the error.
out << std::endl
<< fmt("%1% %|2$5d|| %3%",
prefix,
(nixCode.errPos.line),
*nixCode.errLineOfCode);
prefix,
(errPos.line),
*loc.errLineOfCode);
// error arrows for the column range.
if (nixCode.errPos.column > 0) {
int start = nixCode.errPos.column;
if (errPos.column > 0) {
int start = errPos.column;
std::string spaces;
for (int i = 0; i < start; ++i) {
spaces.append(" ");
@ -87,23 +170,49 @@ void printCodeLines(std::ostream &out, const string &prefix, const NixCode &nixC
out << std::endl
<< fmt("%1% |%2%" ANSI_RED "%3%" ANSI_NORMAL,
prefix,
spaces,
arrows);
prefix,
spaces,
arrows);
}
}
// next line of code.
if (nixCode.nextLineOfCode.has_value()) {
if (loc.nextLineOfCode.has_value()) {
out << std::endl
<< fmt("%1% %|2$5d|| %3%",
prefix,
(nixCode.errPos.line + 1),
*nixCode.nextLineOfCode);
prefix,
(errPos.line + 1),
*loc.nextLineOfCode);
}
}
std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo)
void printAtPos(const string &prefix, const ErrPos &pos, std::ostream &out)
{
if (pos)
{
switch (pos.origin) {
case foFile: {
out << prefix << ANSI_BLUE << "at: " << ANSI_YELLOW << showErrPos(pos) <<
ANSI_BLUE << " in file: " << ANSI_NORMAL << pos.file;
break;
}
case foString: {
out << prefix << ANSI_BLUE << "at: " << ANSI_YELLOW << showErrPos(pos) <<
ANSI_BLUE << " from string" << ANSI_NORMAL;
break;
}
case foStdin: {
out << prefix << ANSI_BLUE << "at: " << ANSI_YELLOW << showErrPos(pos) <<
ANSI_BLUE << " from stdin" << ANSI_NORMAL;
break;
}
default:
throw Error("invalid FileOrigin in errPos");
}
}
}
std::ostream& showErrorInfo(std::ostream &out, const ErrorInfo &einfo, bool showTrace)
{
auto errwidth = std::max<size_t>(getWindowSize().second, 20);
string prefix = "";
@ -158,8 +267,12 @@ std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo)
}
}
auto ndl = prefix.length() + levelString.length() + 3 + einfo.name.length() + einfo.programName.value_or("").length();
auto dashwidth = ndl > (errwidth - 3) ? 3 : errwidth - ndl;
auto ndl = prefix.length()
+ filterANSIEscapes(levelString, true).length()
+ 7
+ einfo.name.length()
+ einfo.programName.value_or("").length();
auto dashwidth = std::max<int>(errwidth - ndl, 3);
std::string dashes(dashwidth, '-');
@ -179,16 +292,9 @@ std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo)
einfo.programName.value_or(""));
bool nl = false; // intersperse newline between sections.
if (einfo.nixCode.has_value()) {
if (einfo.nixCode->errPos.file != "") {
// filename, line, column.
out << std::endl << fmt("%1%in file: " ANSI_BLUE "%2% %3%" ANSI_NORMAL,
prefix,
einfo.nixCode->errPos.file,
showErrPos(einfo.nixCode->errPos));
} else {
out << std::endl << fmt("%1%from command line argument", prefix);
}
if (einfo.errPos.has_value() && (*einfo.errPos)) {
out << prefix << std::endl;
printAtPos(prefix, *einfo.errPos, out);
nl = true;
}
@ -200,12 +306,16 @@ std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo)
nl = true;
}
// lines of code.
if (einfo.nixCode.has_value() && einfo.nixCode->errLineOfCode.has_value()) {
if (nl)
out << std::endl << prefix;
printCodeLines(out, prefix, *einfo.nixCode);
nl = true;
if (einfo.errPos.has_value() && (*einfo.errPos)) {
auto loc = getCodeLines(*einfo.errPos);
// lines of code.
if (loc.has_value()) {
if (nl)
out << std::endl << prefix;
printCodeLines(out, prefix, *einfo.errPos, *loc);
nl = true;
}
}
// hint
@ -216,6 +326,59 @@ std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo)
nl = true;
}
// traces
if (showTrace && !einfo.traces.empty())
{
const string tracetitle(" show-trace ");
int fill = errwidth - tracetitle.length();
int lw = 0;
int rw = 0;
const int min_dashes = 3;
if (fill > min_dashes * 2) {
if (fill % 2 != 0) {
lw = fill / 2;
rw = lw + 1;
}
else
{
lw = rw = fill / 2;
}
}
else
lw = rw = min_dashes;
if (nl)
out << std::endl << prefix;
out << ANSI_BLUE << std::string(lw, '-') << tracetitle << std::string(rw, '-') << ANSI_NORMAL;
for (auto iter = einfo.traces.rbegin(); iter != einfo.traces.rend(); ++iter)
{
try {
out << std::endl << prefix;
out << ANSI_BLUE << "trace: " << ANSI_NORMAL << iter->hint.str();
nl = true;
if (*iter->pos) {
auto pos = iter->pos.value();
out << std::endl << prefix;
printAtPos(prefix, pos, out);
auto loc = getCodeLines(pos);
if (loc.has_value())
{
out << std::endl << prefix;
printCodeLines(out, prefix, pos, *loc);
out << std::endl << prefix;
}
}
} catch(const std::bad_optional_access& e) {
out << iter->hint.str() << std::endl;
}
}
}
return out;
}
}

80
src/libutil/error.hh
View file

@ -25,20 +25,20 @@ namespace nix {
/*
This file defines two main structs/classes used in nix error handling.
This file defines two main structs/classes used in nix error handling.
ErrorInfo provides a standard payload of error information, with conversion to string
happening in the logger rather than at the call site.
ErrorInfo provides a standard payload of error information, with conversion to string
happening in the logger rather than at the call site.
BaseError is the ancestor of nix specific exceptions (and Interrupted), and contains
an ErrorInfo.
BaseError is the ancestor of nix specific exceptions (and Interrupted), and contains
an ErrorInfo.
ErrorInfo structs are sent to the logger as part of an exception, or directly with the
logError or logWarning macros.
ErrorInfo structs are sent to the logger as part of an exception, or directly with the
logError or logWarning macros.
See the error-demo.cc program for usage examples.
See the error-demo.cc program for usage examples.
*/
*/
typedef enum {
lvlError = 0,
@ -50,11 +50,25 @@ typedef enum {
lvlVomit
} Verbosity;
typedef enum {
foFile,
foStdin,
foString
} FileOrigin;
// the lines of code surrounding an error.
struct LinesOfCode {
std::optional<string> prevLineOfCode;
std::optional<string> errLineOfCode;
std::optional<string> nextLineOfCode;
};
// ErrPos indicates the location of an error in a nix file.
struct ErrPos {
int line = 0;
int column = 0;
string file;
FileOrigin origin;
operator bool() const
{
@ -65,6 +79,7 @@ struct ErrPos {
template <class P>
ErrPos& operator=(const P &pos)
{
origin = pos.origin;
line = pos.line;
column = pos.column;
// is file symbol null?
@ -82,11 +97,9 @@ struct ErrPos {
}
};
struct NixCode {
ErrPos errPos;
std::optional<string> prevLineOfCode;
std::optional<string> errLineOfCode;
std::optional<string> nextLineOfCode;
struct Trace {
std::optional<ErrPos> pos;
hintformat hint;
};
struct ErrorInfo {
@ -94,19 +107,19 @@ struct ErrorInfo {
string name;
string description;
std::optional<hintformat> hint;
std::optional<NixCode> nixCode;
std::optional<ErrPos> errPos;
std::list<Trace> traces;
static std::optional<string> programName;
};
std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo);
std::ostream& showErrorInfo(std::ostream &out, const ErrorInfo &einfo, bool showTrace);
/* BaseError should generally not be caught, as it has Interrupted as
a subclass. Catch Error instead. */
class BaseError : public std::exception
{
protected:
string prefix_; // used for location traces etc.
mutable ErrorInfo err;
mutable std::optional<string> what_;
@ -117,23 +130,23 @@ public:
template<typename... Args>
BaseError(unsigned int status, const Args & ... args)
: err { .level = lvlError,
.hint = hintfmt(args...)
}
: err {.level = lvlError,
.hint = hintfmt(args...)
}
, status(status)
{ }
template<typename... Args>
BaseError(const std::string & fs, const Args & ... args)
: err { .level = lvlError,
.hint = hintfmt(fs, args...)
}
: err {.level = lvlError,
.hint = hintfmt(fs, args...)
}
{ }
BaseError(hintformat hint)
: err { .level = lvlError,
.hint = hint
}
: err {.level = lvlError,
.hint = hint
}
{ }
BaseError(ErrorInfo && e)
@ -154,10 +167,17 @@ public:
#endif
const string & msg() const { return calcWhat(); }
const string & prefix() const { return prefix_; }
BaseError & addPrefix(const FormatOrString & fs);
const ErrorInfo & info() { calcWhat(); return err; }
template<typename... Args>
BaseError & addTrace(std::optional<ErrPos> e, const string &fs, const Args & ... args)
{
return addTrace(e, hintfmt(fs, args...));
}
BaseError & addTrace(std::optional<ErrPos> e, hintformat hint);
bool hasTrace() const { return !err.traces.empty(); }
};
#define MakeError(newClass, superClass) \
@ -177,7 +197,7 @@ public:
template<typename... Args>
SysError(const Args & ... args)
:Error("")
: Error("")
{
errNo = errno;
auto hf = hintfmt(args...);

10
src/libutil/logging.cc
View file

@ -1,5 +1,6 @@
#include "logging.hh"
#include "util.hh"
#include "config.hh"
#include <atomic>
#include <nlohmann/json.hpp>
@ -7,6 +8,10 @@
namespace nix {
LoggerSettings loggerSettings;
static GlobalConfig::Register r1(&loggerSettings);
static thread_local ActivityId curActivity = 0;
ActivityId getCurActivity()
@ -72,10 +77,11 @@ public:
void logEI(const ErrorInfo & ei) override
{
std::stringstream oss;
oss << ei;
showErrorInfo(oss, ei, loggerSettings.showTrace.get());
log(ei.level, oss.str());
}
void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
const std::string & s, const Fields & fields, ActivityId parent)
@ -173,7 +179,7 @@ struct JSONLogger : Logger {
void logEI(const ErrorInfo & ei) override
{
std::ostringstream oss;
oss << ei;
showErrorInfo(oss, ei, loggerSettings.showTrace.get());
nlohmann::json json;
json["action"] = "msg";

11
src/libutil/logging.hh
View file

@ -2,6 +2,7 @@
#include "types.hh"
#include "error.hh"
#include "config.hh"
namespace nix {
@ -34,6 +35,16 @@ typedef enum {
typedef uint64_t ActivityId;
struct LoggerSettings : Config
{
Setting<bool> showTrace{this,
false,
"show-trace",
"Whether to show a stack trace on evaluation errors."};
};
extern LoggerSettings loggerSettings;
class Logger
{
friend struct Activity;

112
src/libutil/tests/logging.cc
View file

@ -11,6 +11,13 @@ namespace nix {
* logEI
* --------------------------------------------------------------------------*/
const char *test_file =
"previous line of code\n"
"this is the problem line of code\n"
"next line of code\n";
const char *one_liner =
"this is the other problem line of code";
TEST(logEI, catpuresBasicProperties) {
MakeError(TestError, Error);
@ -137,7 +144,6 @@ namespace nix {
* logError
* --------------------------------------------------------------------------*/
TEST(logError, logErrorWithoutHintOrCode) {
testing::internal::CaptureStderr();
@ -152,7 +158,7 @@ namespace nix {
TEST(logError, logErrorWithPreviousAndNextLinesOfCode) {
SymbolTable testTable;
auto problem_file = testTable.create("myfile.nix");
auto problem_file = testTable.create(test_file);
testing::internal::CaptureStderr();
@ -162,21 +168,16 @@ namespace nix {
.hint = hintfmt("this hint has %1% templated %2%!!",
"yellow",
"values"),
.nixCode = NixCode {
.errPos = Pos(problem_file, 40, 13),
.prevLineOfCode = "previous line of code",
.errLineOfCode = "this is the problem line of code",
.nextLineOfCode = "next line of code",
}});
.errPos = Pos(foString, problem_file, 02, 13),
});
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- error name --- error-unit-test\x1B[0m\nin file: \x1B[34;1mmyfile.nix (40:13)\x1B[0m\n\nerror with code lines\n\n 39| previous line of code\n 40| this is the problem line of code\n | \x1B[31;1m^\x1B[0m\n 41| next line of code\n\nthis hint has \x1B[33;1myellow\x1B[0m templated \x1B[33;1mvalues\x1B[0m!!\n");
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- error name --- error-unit-test\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(2:13)\x1B[34;1m from string\x1B[0m\n\nerror with code lines\n\n 1| previous line of code\n 2| this is the problem line of code\n | \x1B[31;1m^\x1B[0m\n 3| next line of code\n\nthis hint has \x1B[33;1myellow\x1B[0m templated \x1B[33;1mvalues\x1B[0m!!\n");
}
TEST(logError, logErrorWithoutLinesOfCode) {
TEST(logError, logErrorWithInvalidFile) {
SymbolTable testTable;
auto problem_file = testTable.create("myfile.nix");
auto problem_file = testTable.create("invalid filename");
testing::internal::CaptureStderr();
logError({
@ -185,28 +186,23 @@ namespace nix {
.hint = hintfmt("this hint has %1% templated %2%!!",
"yellow",
"values"),
.nixCode = NixCode {
.errPos = Pos(problem_file, 40, 13)
}});
.errPos = Pos(foFile, problem_file, 02, 13)
});
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- error name --- error-unit-test\x1B[0m\nin file: \x1B[34;1mmyfile.nix (40:13)\x1B[0m\n\nerror without any code lines.\n\nthis hint has \x1B[33;1myellow\x1B[0m templated \x1B[33;1mvalues\x1B[0m!!\n");
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- SysError --- error-unit-test\x1B[0m\nopening file '\x1B[33;1minvalid filename\x1B[0m': \x1B[33;1mNo such file or directory\x1B[0m\n\x1B[31;1merror:\x1B[0m\x1B[34;1m --- error name --- error-unit-test\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(2:13)\x1B[34;1m in file: \x1B[0minvalid filename\n\nerror without any code lines.\n\nthis hint has \x1B[33;1myellow\x1B[0m templated \x1B[33;1mvalues\x1B[0m!!\n");
}
TEST(logError, logErrorWithOnlyHintAndName) {
SymbolTable testTable;
auto problem_file = testTable.create("myfile.nix");
testing::internal::CaptureStderr();
logError({
.name = "error name",
.hint = hintfmt("hint %1%", "only"),
.nixCode = NixCode {
.errPos = Pos(problem_file, 40, 13)
}});
});
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- error name --- error-unit-test\x1B[0m\nin file: \x1B[34;1mmyfile.nix (40:13)\x1B[0m\n\nhint \x1B[33;1monly\x1B[0m\n");
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- error name --- error-unit-test\x1B[0m\nhint \x1B[33;1monly\x1B[0m\n");
}
@ -219,18 +215,18 @@ namespace nix {
logWarning({
.name = "name",
.description = "error description",
.description = "warning description",
.hint = hintfmt("there was a %1%", "warning"),
});
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[33;1mwarning:\x1B[0m\x1B[34;1m --- name --- error-unit-test\x1B[0m\nerror description\n\nthere was a \x1B[33;1mwarning\x1B[0m\n");
ASSERT_STREQ(str.c_str(), "\x1B[33;1mwarning:\x1B[0m\x1B[34;1m --- name --- error-unit-test\x1B[0m\nwarning description\n\nthere was a \x1B[33;1mwarning\x1B[0m\n");
}
TEST(logWarning, logWarningWithFileLineNumAndCode) {
SymbolTable testTable;
auto problem_file = testTable.create("myfile.nix");
auto problem_file = testTable.create(test_file);
testing::internal::CaptureStderr();
@ -240,16 +236,68 @@ namespace nix {
.hint = hintfmt("this hint has %1% templated %2%!!",
"yellow",
"values"),
.nixCode = NixCode {
.errPos = Pos(problem_file, 40, 13),
.prevLineOfCode = std::nullopt,
.errLineOfCode = "this is the problem line of code",
.nextLineOfCode = std::nullopt
}});
.errPos = Pos(foStdin, problem_file, 2, 13),
});
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[33;1mwarning:\x1B[0m\x1B[34;1m --- warning name --- error-unit-test\x1B[0m\nin file: \x1B[34;1mmyfile.nix (40:13)\x1B[0m\n\nwarning description\n\n 40| this is the problem line of code\n | \x1B[31;1m^\x1B[0m\n\nthis hint has \x1B[33;1myellow\x1B[0m templated \x1B[33;1mvalues\x1B[0m!!\n");
ASSERT_STREQ(str.c_str(), "\x1B[33;1mwarning:\x1B[0m\x1B[34;1m --- warning name --- error-unit-test\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(2:13)\x1B[34;1m from stdin\x1B[0m\n\nwarning description\n\n 1| previous line of code\n 2| this is the problem line of code\n | \x1B[31;1m^\x1B[0m\n 3| next line of code\n\nthis hint has \x1B[33;1myellow\x1B[0m templated \x1B[33;1mvalues\x1B[0m!!\n");
}
/* ----------------------------------------------------------------------------
* traces
* --------------------------------------------------------------------------*/
TEST(addTrace, showTracesWithShowTrace) {
SymbolTable testTable;
auto problem_file = testTable.create(test_file);
auto oneliner_file = testTable.create(one_liner);
auto e = AssertionError(ErrorInfo {
.name = "wat",
.description = "a well-known problem occurred",
.hint = hintfmt("it has been %1% days since our last error", "zero"),
.errPos = Pos(foString, problem_file, 2, 13),
});
e.addTrace(Pos(foStdin, oneliner_file, 1, 19), "while trying to compute %1%", 42);
e.addTrace(std::nullopt, "while doing something without a %1%", "pos");
testing::internal::CaptureStderr();
loggerSettings.showTrace.assign(true);
logError(e.info());
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- AssertionError --- error-unit-test\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(2:13)\x1B[34;1m from string\x1B[0m\n\na well-known problem occurred\n\n 1| previous line of code\n 2| this is the problem line of code\n | \x1B[31;1m^\x1B[0m\n 3| next line of code\n\nit has been \x1B[33;1mzero\x1B[0m days since our last error\n\x1B[34;1m---- show-trace ----\x1B[0m\n\x1B[34;1mtrace: \x1B[0mwhile trying to compute \x1B[33;1m42\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(1:19)\x1B[34;1m from stdin\x1B[0m\n\n 1| this is the other problem line of code\n | \x1B[31;1m^\x1B[0m\n\n\x1B[34;1mtrace: \x1B[0mwhile doing something without a \x1B[33;1mpos\x1B[0m\n");
}
TEST(addTrace, hideTracesWithoutShowTrace) {
SymbolTable testTable;
auto problem_file = testTable.create(test_file);
auto oneliner_file = testTable.create(one_liner);
auto e = AssertionError(ErrorInfo {
.name = "wat",
.description = "a well-known problem occurred",
.hint = hintfmt("it has been %1% days since our last error", "zero"),
.errPos = Pos(foString, problem_file, 2, 13),
});
e.addTrace(Pos(foStdin, oneliner_file, 1, 19), "while trying to compute %1%", 42);
e.addTrace(std::nullopt, "while doing something without a %1%", "pos");
testing::internal::CaptureStderr();
loggerSettings.showTrace.assign(false);
logError(e.info());
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- AssertionError --- error-unit-test\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(2:13)\x1B[34;1m from string\x1B[0m\n\na well-known problem occurred\n\n 1| previous line of code\n 2| this is the problem line of code\n | \x1B[31;1m^\x1B[0m\n 3| next line of code\n\nit has been \x1B[33;1mzero\x1B[0m days since our last error\n");
}
/* ----------------------------------------------------------------------------

4
src/nix-env/nix-env.cc
View file

@ -593,7 +593,7 @@ static void upgradeDerivations(Globals & globals,
} else newElems.push_back(i);
} catch (Error & e) {
e.addPrefix(fmt("while trying to find an upgrade for '%s':\n", i.queryName()));
e.addTrace(std::nullopt, "while trying to find an upgrade for '%s'", i.queryName());
throw;
}
}
@ -1185,7 +1185,7 @@ static void opQuery(Globals & globals, Strings opFlags, Strings opArgs)
} catch (AssertionError & e) {
printMsg(lvlTalkative, "skipping derivation named '%1%' which gives an assertion failure", i.queryName());
} catch (Error & e) {
e.addPrefix(fmt("while querying the derivation named '%1%':\n", i.queryName()));
e.addTrace(std::nullopt, "while querying the derivation named '%1%'", i.queryName());
throw;
}
}

6
src/nix/repl.cc
View file

@ -211,12 +211,12 @@ void NixRepl::mainLoop(const std::vector<std::string> & files)
// input without clearing the input so far.
continue;
} else {
printMsg(lvlError, error + "%1%%2%", (settings.showTrace ? e.prefix() : ""), e.msg());
printMsg(lvlError, e.msg());
}
} catch (Error & e) {
printMsg(lvlError, error + "%1%%2%", (settings.showTrace ? e.prefix() : ""), e.msg());
printMsg(lvlError, e.msg());
} catch (Interrupted & e) {
printMsg(lvlError, error + "%1%%2%", (settings.showTrace ? e.prefix() : ""), e.msg());
printMsg(lvlError, e.msg());
}
// We handled the current input fully, so we should clear it

2
src/nix/search.cc
View file

@ -216,7 +216,7 @@ struct CmdSearch : SourceExprCommand, MixJSON
} catch (AssertionError & e) {
} catch (Error & e) {
if (!toplevel) {
e.addPrefix(fmt("While evaluating the attribute '%s':\n", attrPath));
e.addTrace(std::nullopt, "While evaluating the attribute '%s'", attrPath);
throw;
}
}

11
tests/misc.sh
View file

@ -16,6 +16,11 @@ nix-env --foo 2>&1 | grep "no operation"
nix-env -q --foo 2>&1 | grep "unknown flag"
# Eval Errors.
eval_res=$(nix-instantiate --eval -E 'let a = {} // a; in a.foo' 2>&1 || true)
echo $eval_res | grep "(string) (1:15)"
echo $eval_res | grep "infinite recursion encountered"
eval_arg_res=$(nix-instantiate --eval -E 'let a = {} // a; in a.foo' 2>&1 || true)
echo $eval_arg_res | grep "at: (1:15) from string"
echo $eval_arg_res | grep "infinite recursion encountered"
eval_stdin_res=$(echo 'let a = {} // a; in a.foo' | nix-instantiate --eval -E - 2>&1 || true)
echo $eval_stdin_res | grep "at: (1:15) from stdin"
echo $eval_stdin_res | grep "infinite recursion encountered"