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* Keep track of the source positions of attributes.

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This commit is contained in:
Eelco Dolstra 2010-05-07 12:11:05 +00:00
parent 84ce7ac76f
commit e2d5e40f4f
8 changed files with 117 additions and 86 deletions
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2
src/libexpr/attr-path.cc
View file

@ -48,7 +48,7 @@ void findAlongAttrPath(EvalState & state, const string & attrPath,
Bindings::iterator a = v.attrs->find(state.symbols.create(attr));
if (a == v.attrs->end())
throw Error(format("attribute `%1%' in selection path `%2%' not found") % attr % curPath);
v = a->second;
v = a->second.value;
}
else if (apType == apIndex) {

2
src/libexpr/common-opts.cc
View file

@ -20,7 +20,7 @@ bool parseOptionArg(const string & arg, Strings::iterator & i,
if (i == argsEnd) throw error;
string value = *i++;
Value & v(autoArgs[state.symbols.create(name)]);
Value & v(autoArgs[state.symbols.create(name)].value);
if (arg == "--arg")
state.mkThunk_( v, parseExprFromString(state, value, absPath(".")));

59
src/libexpr/eval.cc
View file

@ -44,7 +44,7 @@ std::ostream & operator << (std::ostream & str, Value & v)
case tAttrs:
str << "{ ";
foreach (Bindings::iterator, i, *v.attrs)
str << (string) i->first << " = " << i->second << "; ";
str << (string) i->first << " = " << i->second.value << "; ";
str << "}";
break;
case tList:
@ -128,7 +128,7 @@ void EvalState::addConstant(const string & name, Value & v)
staticBaseEnv.vars[symbols.create(name)] = baseEnvDispl;
baseEnv.values[baseEnvDispl++] = v;
string name2 = string(name, 0, 2) == "__" ? string(name, 2) : name;
(*baseEnv.values[0].attrs)[symbols.create(name2)] = v;
(*baseEnv.values[0].attrs)[symbols.create(name2)].value = v;
}
@ -143,7 +143,7 @@ void EvalState::addPrimOp(const string & name,
v.primOp.name = strdup(name2.c_str());
staticBaseEnv.vars[symbols.create(name)] = baseEnvDispl;
baseEnv.values[baseEnvDispl++] = v;
(*baseEnv.values[0].attrs)[symbols.create(name2)] = v;
(*baseEnv.values[0].attrs)[symbols.create(name2)].value = v;
}
@ -202,6 +202,11 @@ LocalNoInline(void addErrorPrefix(Error & e, const char * s, const Pos & pos))
e.addPrefix(format(s) % pos);
}
LocalNoInline(void addErrorPrefix(Error & e, const char * s, const string & s2, const Pos & pos))
{
e.addPrefix(format(s) % s2 % pos);
}
void mkString(Value & v, const char * s)
{
@ -239,7 +244,7 @@ Value * EvalState::lookupVar(Env * env, const VarRef & var)
while (1) {
Bindings::iterator j = env->values[0].attrs->find(var.name);
if (j != env->values[0].attrs->end())
return &j->second;
return &j->second.value;
if (env->prevWith == 0)
throwEvalError("undefined variable `%1%'", var.name);
for (unsigned int l = env->prevWith; l; --l, env = env->up) ;
@ -290,8 +295,11 @@ void EvalState::mkThunk_(Value & v, Expr * expr)
void EvalState::cloneAttrs(Value & src, Value & dst)
{
mkAttrs(dst);
foreach (Bindings::iterator, i, *src.attrs)
mkCopy((*dst.attrs)[i->first], i->second);
foreach (Bindings::iterator, i, *src.attrs) {
Attr & a = (*dst.attrs)[i->first];
mkCopy(a.value, i->second.value);
a.pos = i->second.pos;
}
}
@ -414,15 +422,16 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
/* The recursive attributes are evaluated in the new
environment. */
foreach (Attrs::iterator, i, attrs) {
Value & v2 = (*v.attrs)[i->first];
mkCopy(v2, env2.values[displ]);
nix::Attr & a = (*v.attrs)[i->first];
mkCopy(a.value, env2.values[displ]);
mkThunk(env2.values[displ++], env2, i->second.first);
a.pos = &i->second.second;
}
/* The inherited attributes, on the other hand, are
evaluated in the original environment. */
foreach (list<VarRef>::iterator, i, inherited) {
Value & v2 = (*v.attrs)[i->name];
Value & v2 = (*v.attrs)[i->name].value;
Value * v3 = state.lookupVar(&env, *i);
mkCopy(v2, *v3);
mkCopy(env2.values[displ++], *v3);
@ -432,12 +441,13 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
else {
foreach (Attrs::iterator, i, attrs) {
Value & v2 = (*v.attrs)[i->first];
mkThunk(v2, env, i->second.first);
nix::Attr & a = (*v.attrs)[i->first];
mkThunk(a.value, env, i->second.first);
a.pos = &i->second.second;
}
foreach (list<VarRef>::iterator, i, inherited) {
Value & v2 = (*v.attrs)[i->name];
Value & v2 = (*v.attrs)[i->name].value;
mkCopy(v2, *state.lookupVar(&env, *i));
}
}
@ -494,12 +504,13 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
if (i == v2.attrs->end())
throwEvalError("attribute `%1%' missing", name);
try {
state.forceValue(i->second);
state.forceValue(i->second.value);
} catch (Error & e) {
addErrorPrefix(e, "while evaluating the attribute `%1%':\n", name);
addErrorPrefix(e, "while evaluating the attribute `%1%' at %2%:\n",
name, *i->second.pos);
throw;
}
v = i->second;
v = i->second.value;
}
@ -601,7 +612,7 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
mkThunk(env2.values[displ++], env2, i->def);
} else {
attrsUsed++;
mkCopy(env2.values[displ++], j->second);
mkCopy(env2.values[displ++], j->second.value);
}
}
@ -721,8 +732,11 @@ void ExprOpUpdate::eval(EvalState & state, Env & env, Value & v)
state.evalAttrs(env, e2, v2);
foreach (Bindings::iterator, i, *v2.attrs)
mkCopy((*v.attrs)[i->first], i->second);
foreach (Bindings::iterator, i, *v2.attrs) {
Attr & a = (*v.attrs)[i->first];
mkCopy(a.value, i->second.value);
a.pos = i->second.pos;
}
}
@ -802,7 +816,7 @@ void EvalState::strictForceValue(Value & v)
if (v.type == tAttrs) {
foreach (Bindings::iterator, i, *v.attrs)
strictForceValue(i->second);
strictForceValue(i->second.value);
}
else if (v.type == tList) {
@ -887,7 +901,7 @@ bool EvalState::isDerivation(Value & v)
{
if (v.type != tAttrs) return false;
Bindings::iterator i = v.attrs->find(sType);
return i != v.attrs->end() && forceStringNoCtx(i->second) == "derivation";
return i != v.attrs->end() && forceStringNoCtx(i->second.value) == "derivation";
}
@ -933,7 +947,7 @@ string EvalState::coerceToString(Value & v, PathSet & context,
Bindings::iterator i = v.attrs->find(sOutPath);
if (i == v.attrs->end())
throwTypeError("cannot coerce an attribute set (except a derivation) to a string");
return coerceToString(i->second, context, coerceMore, copyToStore);
return coerceToString(i->second.value, context, coerceMore, copyToStore);
}
if (coerceMore) {
@ -1021,7 +1035,8 @@ bool EvalState::eqValues(Value & v1, Value & v2)
if (v1.attrs->size() != v2.attrs->size()) return false;
Bindings::iterator i, j;
for (i = v1.attrs->begin(), j = v2.attrs->begin(); i != v1.attrs->end(); ++i, ++j)
if (i->first != j->first || !eqValues(i->second, j->second)) return false;
if (i->first != j->first || !eqValues(i->second.value, j->second.value))
return false;
return true;
}

11
src/libexpr/eval.hh
View file

@ -14,8 +14,9 @@ class Hash;
class EvalState;
struct Env;
struct Value;
struct Attr;
typedef std::map<Symbol, Value> Bindings;
typedef std::map<Symbol, Attr> Bindings;
typedef enum {
@ -111,6 +112,14 @@ struct Env
};
struct Attr
{
Value value;
Pos * pos;
Attr() : pos(&noPos) { };
};
static inline void mkInt(Value & v, int n)
{
v.type = tInt;

32
src/libexpr/get-drvs.cc
View file

@ -10,7 +10,7 @@ string DrvInfo::queryDrvPath(EvalState & state) const
if (drvPath == "" && attrs) {
Bindings::iterator i = attrs->find(state.sDrvPath);
PathSet context;
(string &) drvPath = i != attrs->end() ? state.coerceToPath(i->second, context) : "";
(string &) drvPath = i != attrs->end() ? state.coerceToPath(i->second.value, context) : "";
}
return drvPath;
}
@ -21,7 +21,7 @@ string DrvInfo::queryOutPath(EvalState & state) const
if (outPath == "" && attrs) {
Bindings::iterator i = attrs->find(state.sOutPath);
PathSet context;
(string &) outPath = i != attrs->end() ? state.coerceToPath(i->second, context) : "";
(string &) outPath = i != attrs->end() ? state.coerceToPath(i->second.value, context) : "";
}
return outPath;
}
@ -36,21 +36,21 @@ MetaInfo DrvInfo::queryMetaInfo(EvalState & state) const
Bindings::iterator a = attrs->find(state.sMeta);
if (a == attrs->end()) return meta; /* fine, empty meta information */
state.forceAttrs(a->second);
state.forceAttrs(a->second.value);
foreach (Bindings::iterator, i, *a->second.attrs) {
foreach (Bindings::iterator, i, *a->second.value.attrs) {
MetaValue value;
state.forceValue(i->second);
if (i->second.type == tString) {
state.forceValue(i->second.value);
if (i->second.value.type == tString) {
value.type = MetaValue::tpString;
value.stringValue = i->second.string.s;
} else if (i->second.type == tInt) {
value.stringValue = i->second.value.string.s;
} else if (i->second.value.type == tInt) {
value.type = MetaValue::tpInt;
value.intValue = i->second.integer;
} else if (i->second.type == tList) {
value.intValue = i->second.value.integer;
} else if (i->second.value.type == tList) {
value.type = MetaValue::tpStrings;
for (unsigned int j = 0; j < i->second.list.length; ++j)
value.stringValues.push_back(state.forceStringNoCtx(*i->second.list.elems[j]));
for (unsigned int j = 0; j < i->second.value.list.length; ++j)
value.stringValues.push_back(state.forceStringNoCtx(*i->second.value.list.elems[j]));
} else continue;
((MetaInfo &) meta)[i->first] = value;
}
@ -99,13 +99,13 @@ static bool getDerivation(EvalState & state, Value & v,
Bindings::iterator i = v.attrs->find(state.sName);
/* !!! We really would like to have a decent back trace here. */
if (i == v.attrs->end()) throw TypeError("derivation name missing");
drv.name = state.forceStringNoCtx(i->second);
drv.name = state.forceStringNoCtx(i->second.value);
i = v.attrs->find(state.sSystem);
if (i == v.attrs->end())
drv.system = "unknown";
else
drv.system = state.forceStringNoCtx(i->second);
drv.system = state.forceStringNoCtx(i->second.value);
drv.attrs = v.attrs;
@ -168,7 +168,7 @@ static void getDerivations(EvalState & state, Value & vIn,
foreach (SortedSymbols::iterator, i, attrs) {
startNest(nest, lvlDebug, format("evaluating attribute `%1%'") % i->first);
string pathPrefix2 = addToPath(pathPrefix, i->first);
Value & v2((*v.attrs)[i->second]);
Value & v2((*v.attrs)[i->second].value);
if (combineChannels)
getDerivations(state, v2, pathPrefix2, autoArgs, drvs, done);
else if (getDerivation(state, v2, pathPrefix2, drvs, done)) {
@ -178,7 +178,7 @@ static void getDerivations(EvalState & state, Value & vIn,
attribute. */
if (v2.type == tAttrs) {
Bindings::iterator j = v2.attrs->find(state.symbols.create("recurseForDerivations"));
if (j != v2.attrs->end() && state.forceBool(j->second))
if (j != v2.attrs->end() && state.forceBool(j->second.value))
getDerivations(state, v2, pathPrefix2, autoArgs, drvs, done);
}
}

66
src/libexpr/primops.cc
View file

@ -115,18 +115,18 @@ static void prim_genericClosure(EvalState & state, Value * * args, Value & v)
args[0]->attrs->find(state.symbols.create("startSet"));
if (startSet == args[0]->attrs->end())
throw EvalError("attribute `startSet' required");
state.forceList(startSet->second);
state.forceList(startSet->second.value);
list<Value *> workSet;
for (unsigned int n = 0; n < startSet->second.list.length; ++n)
workSet.push_back(startSet->second.list.elems[n]);
for (unsigned int n = 0; n < startSet->second.value.list.length; ++n)
workSet.push_back(startSet->second.value.list.elems[n]);
/* Get the operator. */
Bindings::iterator op =
args[0]->attrs->find(state.symbols.create("operator"));
if (op == args[0]->attrs->end())
throw EvalError("attribute `operator' required");
state.forceValue(op->second);
state.forceValue(op->second.value);
/* Construct the closure by applying the operator to element of
`workSet', adding the result to `workSet', continuing until
@ -143,15 +143,15 @@ static void prim_genericClosure(EvalState & state, Value * * args, Value & v)
e->attrs->find(state.symbols.create("key"));
if (key == e->attrs->end())
throw EvalError("attribute `key' required");
state.forceValue(key->second);
state.forceValue(key->second.value);
if (doneKeys.find(key->second) != doneKeys.end()) continue;
doneKeys.insert(key->second);
if (doneKeys.find(key->second.value) != doneKeys.end()) continue;
doneKeys.insert(key->second.value);
res.push_back(*e);
/* Call the `operator' function with `e' as argument. */
Value call;
mkApp(call, op->second, *e);
mkApp(call, op->second.value, *e);
state.forceList(call);
/* Add the values returned by the operator to the work set. */
@ -323,11 +323,11 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
if (attr == args[0]->attrs->end())
throw EvalError("required attribute `name' missing");
string drvName;
Pos & posDrvName(*attr->second.pos);
try {
drvName = state.forceStringNoCtx(attr->second);
drvName = state.forceStringNoCtx(attr->second.value);
} catch (Error & e) {
e.addPrefix(format("while evaluating the derivation attribute `name' at <SOMEWHERE>:\n"));
// !!! % showPos(posDrvName));
e.addPrefix(format("while evaluating the derivation attribute `name' at %1%:\n") % posDrvName);
throw;
}
@ -348,9 +348,9 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
/* The `args' attribute is special: it supplies the
command-line arguments to the builder. */
if (key == "args") {
state.forceList(i->second);
for (unsigned int n = 0; n < i->second.list.length; ++n) {
string s = state.coerceToString(*i->second.list.elems[n], context, true);
state.forceList(i->second.value);
for (unsigned int n = 0; n < i->second.value.list.length; ++n) {
string s = state.coerceToString(*i->second.value.list.elems[n], context, true);
drv.args.push_back(s);
}
}
@ -358,7 +358,7 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
/* All other attributes are passed to the builder through
the environment. */
else {
string s = state.coerceToString(i->second, context, true);
string s = state.coerceToString(i->second.value, context, true);
drv.env[key] = s;
if (key == "builder") drv.builder = s;
else if (i->first == state.sSystem) drv.platform = s;
@ -373,10 +373,10 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
}
} catch (Error & e) {
e.addPrefix(format("while evaluating the derivation attribute `%1%' at <SOMEWHERE>:\n")
% key /* !!! % showPos(pos) */);
e.addPrefix(format("while instantiating the derivation named `%1%' at <SOMEWHERE>:\n")
% drvName /* !!! % showPos(posDrvName) */);
e.addPrefix(format("while evaluating the derivation attribute `%1%' at %2%:\n")
% key % *i->second.pos);
e.addPrefix(format("while instantiating the derivation named `%1%' at %2%:\n")
% drvName % posDrvName);
throw;
}
}
@ -487,8 +487,8 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
/* !!! assumes a single output */
state.mkAttrs(v);
mkString((*v.attrs)[state.sOutPath], outPath, singleton<PathSet>(drvPath));
mkString((*v.attrs)[state.sDrvPath], drvPath, singleton<PathSet>("=" + drvPath));
mkString((*v.attrs)[state.sOutPath].value, outPath, singleton<PathSet>(drvPath));
mkString((*v.attrs)[state.sDrvPath].value, drvPath, singleton<PathSet>("=" + drvPath));
}
@ -711,8 +711,9 @@ static void prim_getAttr(EvalState & state, Value * * args, Value & v)
Bindings::iterator i = args[1]->attrs->find(state.symbols.create(attr));
if (i == args[1]->attrs->end())
throw EvalError(format("attribute `%1%' missing") % attr);
state.forceValue(i->second);
v = i->second;
// !!! add to stack trace?
state.forceValue(i->second.value);
v = i->second.value;
}
@ -764,13 +765,15 @@ static void prim_listToAttrs(EvalState & state, Value * * args, Value & v)
Bindings::iterator j = v2.attrs->find(state.sName);
if (j == v2.attrs->end())
throw TypeError("`name' attribute missing in a call to `listToAttrs'");
string name = state.forceStringNoCtx(j->second);
string name = state.forceStringNoCtx(j->second.value);
j = v2.attrs->find(state.symbols.create("value"));
if (j == v2.attrs->end())
throw TypeError("`value' attribute missing in a call to `listToAttrs'");
mkCopy((*v.attrs)[state.symbols.create(name)], j->second);
Attr & a = (*v.attrs)[state.symbols.create(name)];
mkCopy(a.value, j->second.value);
a.pos = j->second.pos;
}
}
@ -787,8 +790,11 @@ static void prim_intersectAttrs(EvalState & state, Value * * args, Value & v)
foreach (Bindings::iterator, i, *args[1]->attrs) {
Bindings::iterator j = args[0]->attrs->find(i->first);
if (j != args[0]->attrs->end())
mkCopy((*v.attrs)[i->first], i->second);
if (j != args[0]->attrs->end()) {
Attr & a = (*v.attrs)[i->first];
mkCopy(a.value, i->second.value);
a.pos = i->second.pos;
}
}
}
@ -817,7 +823,7 @@ static void prim_functionArgs(EvalState & state, Value * * args, Value & v)
if (!args[0]->lambda.fun->matchAttrs) return;
foreach (Formals::Formals_::iterator, i, args[0]->lambda.fun->formals->formals)
mkBool((*v.attrs)[i->name], i->def);
mkBool((*v.attrs)[i->name].value, i->def);
}
@ -1000,8 +1006,8 @@ static void prim_parseDrvName(EvalState & state, Value * * args, Value & v)
string name = state.forceStringNoCtx(*args[0]);
DrvName parsed(name);
state.mkAttrs(v);
mkString((*v.attrs)[state.sName], parsed.name);
mkString((*v.attrs)[state.symbols.create("version")], parsed.version);
mkString((*v.attrs)[state.sName].value, parsed.name);
mkString((*v.attrs)[state.symbols.create("version")].value, parsed.version);
}

11
src/libexpr/value-to-xml.cc
View file

@ -28,7 +28,8 @@ static void showAttrs(EvalState & state, bool strict, Bindings & attrs,
names.insert(i->first);
foreach (StringSet::iterator, i, names) {
XMLOpenElement _(doc, "attr", singletonAttrs("name", *i));
printValueAsXML(state, strict, attrs[state.symbols.create(*i)], doc, context, drvsSeen);
printValueAsXML(state, strict, attrs[state.symbols.create(*i)].value,
doc, context, drvsSeen);
}
}
@ -71,12 +72,12 @@ static void printValueAsXML(EvalState & state, bool strict, Value & v,
Path drvPath;
a = v.attrs->find(state.sDrvPath);
if (a != v.attrs->end() && a->second.type == tString)
xmlAttrs["drvPath"] = drvPath = a->second.string.s;
if (a != v.attrs->end() && a->second.value.type == tString)
xmlAttrs["drvPath"] = drvPath = a->second.value.string.s;
a = v.attrs->find(state.sOutPath);
if (a != v.attrs->end() && a->second.type == tString)
xmlAttrs["outPath"] = a->second.string.s;
if (a != v.attrs->end() && a->second.value.type == tString)
xmlAttrs["outPath"] = a->second.value.string.s;
XMLOpenElement _(doc, "derivation", xmlAttrs);