wroclaw-git-backups/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2025-06-26 15:51:15 +02:00
Code Activity

Introduce AbstractPos

Browse source 
This makes the position object used in exceptions abstract, with a
method getSource() to get the source code of the file in which the
error originated. This is needed for lazy trees because source files
don't necessarily exist in the filesystem, and we don't want to make
libutil depend on the InputAccessor type in libfetcher.
This commit is contained in:
Eelco Dolstra 2022-12-13 00:48:04 +01:00
parent edb54c62e6
commit b3fdab28a2
16 changed files with 231 additions and 279 deletions
Download patch file Download diff file Expand all files Collapse all files

31
src/libexpr/eval.cc
View file

@ -823,7 +823,7 @@ void EvalState::runDebugRepl(const Error * error, const Env & env, const Expr &
? std::make_unique<DebugTraceStacker>(
*this,
DebugTrace {
.pos = error->info().errPos ? *error->info().errPos : positions[expr.getPos()],
.pos = error->info().errPos ? error->info().errPos : (std::shared_ptr<AbstractPos>) positions[expr.getPos()],
.expr = expr,
.env = env,
.hint = error->info().msg,
@ -1012,7 +1012,7 @@ void EvalState::throwMissingArgumentError(const PosIdx pos, const char * s, cons
void EvalState::addErrorTrace(Error & e, const char * s, const std::string & s2) const
{
e.addTrace(std::nullopt, s, s2);
e.addTrace(nullptr, s, s2);
}
void EvalState::addErrorTrace(Error & e, const PosIdx pos, const char * s, const std::string & s2) const
@ -1024,13 +1024,13 @@ static std::unique_ptr<DebugTraceStacker> makeDebugTraceStacker(
EvalState & state,
Expr & expr,
Env & env,
std::optional<ErrPos> pos,
std::shared_ptr<AbstractPos> && pos,
const char * s,
const std::string & s2)
{
return std::make_unique<DebugTraceStacker>(state,
DebugTrace {
.pos = pos,
.pos = std::move(pos),
.expr = expr,
.env = env,
.hint = hintfmt(s, s2),
@ -1136,9 +1136,9 @@ void EvalState::mkThunk_(Value & v, Expr * expr)
void EvalState::mkPos(Value & v, PosIdx p)
{
auto pos = positions[p];
if (!pos.file.empty()) {
if (auto path = std::get_if<Path>(&pos.origin)) {
auto attrs = buildBindings(3);
attrs.alloc(sFile).mkString(pos.file);
attrs.alloc(sFile).mkString(*path);
attrs.alloc(sLine).mkInt(pos.line);
attrs.alloc(sColumn).mkInt(pos.column);
v.mkAttrs(attrs);
@ -1246,7 +1246,7 @@ void EvalState::cacheFile(
*this,
*e,
this->baseEnv,
e->getPos() ? std::optional(ErrPos(positions[e->getPos()])) : std::nullopt,
e->getPos() ? (std::shared_ptr<AbstractPos>) positions[e->getPos()] : nullptr,
"while evaluating the file '%1%':", resolvedPath)
: nullptr;
@ -1517,10 +1517,13 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
state.forceValue(*vAttrs, (pos2 ? pos2 : this->pos ) );
} catch (Error & e) {
auto pos2r = state.positions[pos2];
if (pos2 && pos2r.file != state.derivationNixPath)
state.addErrorTrace(e, pos2, "while evaluating the attribute '%1%'",
showAttrPath(state, env, attrPath));
if (pos2) {
auto pos2r = state.positions[pos2];
auto origin = std::get_if<Path>(&pos2r.origin);
if (!(origin && *origin == state.derivationNixPath))
state.addErrorTrace(e, pos2, "while evaluating the attribute '%1%'",
showAttrPath(state, env, attrPath));
}
throw;
}
@ -2497,7 +2500,8 @@ void EvalState::printStats()
else
obj["name"] = nullptr;
if (auto pos = positions[fun->pos]) {
obj["file"] = (std::string_view) pos.file;
if (auto path = std::get_if<Path>(&pos.origin))
obj["file"] = *path;
obj["line"] = pos.line;
obj["column"] = pos.column;
}
@ -2511,7 +2515,8 @@ void EvalState::printStats()
for (auto & i : attrSelects) {
json obj = json::object();
if (auto pos = positions[i.first]) {
obj["file"] = (const std::string &) pos.file;
if (auto path = std::get_if<Path>(&pos.origin))
obj["file"] = *path;
obj["line"] = pos.line;
obj["column"] = pos.column;
}