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* Implemented derivations.

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This commit is contained in:
Eelco Dolstra 2010-03-31 15:38:03 +00:00
parent 5187678913
commit 3d94be61ea
6 changed files with 183 additions and 192 deletions
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41
src/libexpr/eval.cc
View file

@ -261,6 +261,14 @@ void EvalState::mkAttrs(Value & v)
}
void EvalState::cloneAttrs(Value & src, Value & dst)
{
mkAttrs(dst);
foreach (Bindings::iterator, i, *src.attrs)
(*dst.attrs)[i->first] = i->second; // !!! sharing?
}
void EvalState::evalFile(const Path & path, Value & v)
{
startNest(nest, lvlTalkative, format("evaluating file `%1%'") % path);
@ -488,17 +496,14 @@ void EvalState::eval(Env & env, Expr e, Value & v)
/* Attribute set update (//). */
else if (matchOpUpdate(e, e1, e2)) {
mkAttrs(v);
Value v2;
eval(env, e1, v2);
cloneAttrs(v2, v);
eval(env, e2, v2);
foreach (Bindings::iterator, i, *v2.attrs)
(*v.attrs)[i->first] = i->second;
eval(env, e1, v2);
foreach (Bindings::iterator, i, *v2.attrs)
if (v.attrs->find(i->first) == v.attrs->end())
(*v.attrs)[i->first] = i->second;
(*v.attrs)[i->first] = i->second; // !!! sharing
}
/* Attribute existence test (?). */
@ -673,6 +678,15 @@ int EvalState::forceInt(Value & v)
}
bool EvalState::forceBool(Value & v)
{
forceValue(v);
if (v.type != tBool)
throw TypeError(format("value is %1% while a Boolean was expected") % showType(v));
return v.boolean;
}
void EvalState::forceAttrs(Value & v)
{
forceValue(v);
@ -697,15 +711,22 @@ void EvalState::forceFunction(Value & v)
}
string EvalState::forceStringNoCtx(Value & v)
string EvalState::forceString(Value & v)
{
forceValue(v);
if (v.type != tString)
throw TypeError(format("value is %1% while a string was expected") % showType(v));
return string(v.string.s);
}
string EvalState::forceStringNoCtx(Value & v)
{
string s = forceString(v);
if (v.string.context)
throw EvalError(format("the string `%1%' is not allowed to refer to a store path (such as `%2%')")
% v.string.s % v.string.context[0]);
return string(v.string.s);
return s;
}

9
src/libexpr/eval.hh
View file

@ -109,7 +109,6 @@ void mkString(Value & v, const string & s, const PathSet & context = PathSet());
void mkPath(Value & v, const char * s);
typedef std::map<Path, PathSet> DrvRoots;
typedef std::map<Path, Hash> DrvHashes;
/* Cache for calls to addToStore(); maps source paths to the store
@ -124,8 +123,10 @@ std::ostream & operator << (std::ostream & str, Value & v);
class EvalState
{
DrvRoots drvRoots;
public:
DrvHashes drvHashes; /* normalised derivation hashes */
private:
SrcToStore srcToStore;
unsigned long nrValues;
@ -164,9 +165,11 @@ public:
/* Force `v', and then verify that it has the expected type. */
int forceInt(Value & v);
bool forceBool(Value & v);
void forceAttrs(Value & v);
void forceList(Value & v);
void forceFunction(Value & v); // either lambda or primop
string forceString(Value & v);
string forceStringNoCtx(Value & v);
/* String coercion. Converts strings, paths and derivations to a
@ -209,6 +212,8 @@ public:
void mkList(Value & v, unsigned int length);
void mkAttrs(Value & v);
void cloneAttrs(Value & src, Value & dst);
/* Print statistics. */
void printStats();
};

141
src/libexpr/get-drvs.cc
View file

@ -6,25 +6,18 @@
namespace nix {
#if 0
string DrvInfo::queryDrvPath(EvalState & state) const
{
if (drvPath == "") {
Expr a = attrs->get(toATerm("drvPath"));
/* Backwards compatibility hack with user environments made by
Nix <= 0.10: these contain illegal Path("") expressions. */
ATerm t;
if (a && matchPath(evalExpr(state, a), t))
return aterm2String(t);
Bindings::iterator i = attrs->find(toATerm("drvPath"));
PathSet context;
(string &) drvPath = a ? coerceToPath(state, a, context) : "";
(string &) drvPath = i != attrs->end() ? state.coerceToPath(i->second, context) : "";
}
return drvPath;
}
#if 0
string DrvInfo::queryOutPath(EvalState & state) const
{
if (outPath == "") {
@ -102,54 +95,47 @@ void DrvInfo::setMetaInfo(const MetaInfo & meta)
}
attrs->set(toATerm("meta"), makeAttrs(metaAttrs));
}
#endif
/* Cache for already evaluated derivations. Usually putting ATerms in
a STL container is unsafe (they're not scanning for GC roots), but
here it doesn't matter; everything in this set is reachable from
the stack as well. */
typedef set<Expr> Exprs;
/* Cache for already considered values. */
typedef set<Value *> Values;
/* Evaluate expression `e'. If it evaluates to an attribute set of
type `derivation', then put information about it in `drvs' (unless
it's already in `doneExprs'). The result boolean indicates whether
it makes sense for the caller to recursively search for derivations
in `e'. */
static bool getDerivation(EvalState & state, Expr e,
const string & attrPath, DrvInfos & drvs, Exprs & doneExprs)
/* Evaluate value `v'. If it evaluates to an attribute set of type
`derivation', then put information about it in `drvs' (unless it's
already in `doneExprs'). The result boolean indicates whether it
makes sense for the caller to recursively search for derivations in
`v'. */
static bool getDerivation(EvalState & state, Value & v,
const string & attrPath, DrvInfos & drvs, Values & doneValues)
{
try {
state.forceValue(v);
if (v.type != tAttrs) return true;
ATermList es;
e = evalExpr(state, e);
if (!matchAttrs(e, es)) return true;
boost::shared_ptr<ATermMap> attrs(new ATermMap());
queryAllAttrs(e, *attrs, false);
Expr a = attrs->get(toATerm("type"));
if (!a || evalStringNoCtx(state, a) != "derivation") return true;
Bindings::iterator i = v.attrs->find(toATerm("type"));
if (i == v.attrs->end() || state.forceStringNoCtx(i->second) != "derivation") return true;
/* Remove spurious duplicates (e.g., an attribute set like
`rec { x = derivation {...}; y = x;}'. */
if (doneExprs.find(e) != doneExprs.end()) return false;
doneExprs.insert(e);
if (doneValues.find(&v) != doneValues.end()) return false;
doneValues.insert(&v);
DrvInfo drv;
a = attrs->get(toATerm("name"));
i = v.attrs->find(toATerm("name"));
/* !!! We really would like to have a decent back trace here. */
if (!a) throw TypeError("derivation name missing");
drv.name = evalStringNoCtx(state, a);
if (i == v.attrs->end()) throw TypeError("derivation name missing");
drv.name = state.forceStringNoCtx(i->second);
a = attrs->get(toATerm("system"));
if (!a)
i = v.attrs->find(toATerm("system"));
if (i == v.attrs->end())
drv.system = "unknown";
else
drv.system = evalStringNoCtx(state, a);
drv.system = state.forceStringNoCtx(i->second);
drv.attrs = attrs;
drv.attrs = v.attrs;
drv.attrPath = attrPath;
@ -162,11 +148,11 @@ static bool getDerivation(EvalState & state, Expr e,
}
bool getDerivation(EvalState & state, Expr e, DrvInfo & drv)
bool getDerivation(EvalState & state, Value & v, DrvInfo & drv)
{
Exprs doneExprs;
Values doneValues;
DrvInfos drvs;
getDerivation(state, e, "", drvs, doneExprs);
getDerivation(state, v, "", drvs, doneValues);
if (drvs.size() != 1) return false;
drv = drvs.front();
return true;
@ -179,85 +165,72 @@ static string addToPath(const string & s1, const string & s2)
}
static void getDerivations(EvalState & state, Expr e,
static void getDerivations(EvalState & state, Value & v,
const string & pathPrefix, const ATermMap & autoArgs,
DrvInfos & drvs, Exprs & doneExprs)
DrvInfos & drvs, Values & doneValues)
{
e = evalExpr(state, autoCallFunction(evalExpr(state, e), autoArgs));
// !!! autoCallFunction(evalExpr(state, e), autoArgs)
/* Process the expression. */
ATermList es;
DrvInfo drv;
if (!getDerivation(state, e, pathPrefix, drvs, doneExprs))
return;
if (!getDerivation(state, v, pathPrefix, drvs, doneValues)) ;
if (matchAttrs(e, es)) {
ATermMap drvMap(ATgetLength(es));
queryAllAttrs(e, drvMap);
else if (v.type == tAttrs) {
/* !!! undocumented hackery to support combining channels in
nix-env.cc. */
bool combineChannels = drvMap.get(toATerm("_combineChannels"));
bool combineChannels = v.attrs->find(toATerm("_combineChannels")) != v.attrs->end();
/* Consider the attributes in sorted order to get more
deterministic behaviour in nix-env operations (e.g. when
there are names clashes between derivations, the derivation
bound to the attribute with the "lower" name should take
precedence). */
typedef std::map<string, Expr> AttrsSorted;
AttrsSorted attrsSorted;
foreach (ATermMap::const_iterator, i, drvMap)
attrsSorted[aterm2String(i->key)] = i->value;
StringSet attrs;
foreach (Bindings::iterator, i, *v.attrs)
attrs.insert(aterm2String(i->first));
foreach (AttrsSorted::iterator, i, attrsSorted) {
startNest(nest, lvlDebug, format("evaluating attribute `%1%'") % i->first);
string pathPrefix2 = addToPath(pathPrefix, i->first);
foreach (StringSet::iterator, i, attrs) {
startNest(nest, lvlDebug, format("evaluating attribute `%1%'") % *i);
string pathPrefix2 = addToPath(pathPrefix, *i);
Value & v2((*v.attrs)[toATerm(*i)]);
if (combineChannels)
getDerivations(state, i->second, pathPrefix2, autoArgs, drvs, doneExprs);
else if (getDerivation(state, i->second, pathPrefix2, drvs, doneExprs)) {
getDerivations(state, v2, pathPrefix2, autoArgs, drvs, doneValues);
else if (getDerivation(state, v2, pathPrefix2, drvs, doneValues)) {
/* If the value of this attribute is itself an
attribute set, should we recurse into it? => Only
if it has a `recurseForDerivations = true'
attribute. */
ATermList es;
Expr e = evalExpr(state, i->second), e2;
if (matchAttrs(e, es)) {
ATermMap attrs(ATgetLength(es));
queryAllAttrs(e, attrs, false);
if (((e2 = attrs.get(toATerm("recurseForDerivations")))
&& evalBool(state, e2)))
getDerivations(state, e, pathPrefix2, autoArgs, drvs, doneExprs);
if (v2.type == tAttrs) {
Bindings::iterator j = v2.attrs->find(toATerm("recurseForDerivations"));
if (j != v2.attrs->end() && state.forceBool(j->second))
getDerivations(state, v2, pathPrefix2, autoArgs, drvs, doneValues);
}
}
}
}
return;
}
if (matchList(e, es)) {
int n = 0;
for (ATermIterator i(es); i; ++i, ++n) {
else if (v.type == tList) {
for (unsigned int n = 0; n < v.list.length; ++n) {
startNest(nest, lvlDebug,
format("evaluating list element"));
string pathPrefix2 = addToPath(pathPrefix, (format("%1%") % n).str());
if (getDerivation(state, *i, pathPrefix2, drvs, doneExprs))
getDerivations(state, *i, pathPrefix2, autoArgs, drvs, doneExprs);
if (getDerivation(state, v.list.elems[n], pathPrefix2, drvs, doneValues))
getDerivations(state, v.list.elems[n], pathPrefix2, autoArgs, drvs, doneValues);
}
return;
}
throw TypeError("expression does not evaluate to a derivation (or a set or list of those)");
else throw TypeError("expression does not evaluate to a derivation (or a set or list of those)");
}
void getDerivations(EvalState & state, Expr e, const string & pathPrefix,
void getDerivations(EvalState & state, Value & v, const string & pathPrefix,
const ATermMap & autoArgs, DrvInfos & drvs)
{
Exprs doneExprs;
getDerivations(state, e, pathPrefix, autoArgs, drvs, doneExprs);
Values doneValues;
getDerivations(state, v, pathPrefix, autoArgs, drvs, doneValues);
}
#endif
}

15
src/libexpr/get-drvs.hh
View file

@ -35,10 +35,8 @@ public:
string attrPath; /* path towards the derivation */
string system;
/* !!! these should really be hidden, and setMetaInfo() should
make a copy since the ATermMap can be shared between multiple
DrvInfos. */
boost::shared_ptr<ATermMap> attrs;
/* !!! make this private */
Bindings * attrs;
string queryDrvPath(EvalState & state) const;
string queryOutPath(EvalState & state) const;
@ -62,12 +60,11 @@ public:
typedef list<DrvInfo> DrvInfos;
/* Evaluate expression `e'. If it evaluates to a derivation, store
information about the derivation in `drv' and return true.
Otherwise, return false. */
bool getDerivation(EvalState & state, Expr e, DrvInfo & drv);
/* If value `v' denotes a derivation, store information about the
derivation in `drv' and return true. Otherwise, return false. */
bool getDerivation(EvalState & state, Value & v, DrvInfo & drv);
void getDerivations(EvalState & state, Expr e, const string & pathPrefix,
void getDerivations(EvalState & state, Value & v, const string & pathPrefix,
const ATermMap & autoArgs, DrvInfos & drvs);

142
src/libexpr/primops.cc
View file

@ -207,6 +207,7 @@ static void prim_trace(EvalState & state, Value * * args, Value & v)
printMsg(lvlError, format("trace: %1%") % e);
return evalExpr(state, args[1]);
}
#endif
/*************************************************************
@ -282,21 +283,18 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
{
startNest(nest, lvlVomit, "evaluating derivation");
ATermMap attrs;
queryAllAttrs(evalExpr(state, args[0]), attrs, true);
state.forceAttrs(*args[0]);
/* Figure out the name already (for stack backtraces). */
ATerm posDrvName;
Expr eDrvName = attrs.get(toATerm("name"));
if (!eDrvName)
/* Figure out the name first (for stack backtraces). */
Bindings::iterator attr = args[0]->attrs->find(toATerm("name"));
if (attr == args[0]->attrs->end())
throw EvalError("required attribute `name' missing");
if (!matchAttrRHS(eDrvName, eDrvName, posDrvName)) abort();
string drvName;
try {
drvName = evalStringNoCtx(state, eDrvName);
drvName = state.forceStringNoCtx(attr->second);
} catch (Error & e) {
e.addPrefix(format("while evaluating the derivation attribute `name' at %1%:\n")
% showPos(posDrvName));
e.addPrefix(format("while evaluating the derivation attribute `name' at <SOMEWHERE>:\n"));
// !!! % showPos(posDrvName));
throw;
}
@ -308,12 +306,8 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
string outputHash, outputHashAlgo;
bool outputHashRecursive = false;
for (ATermMap::const_iterator i = attrs.begin(); i != attrs.end(); ++i) {
string key = aterm2String(i->key);
ATerm value;
Expr pos;
ATerm rhs = i->value;
if (!matchAttrRHS(rhs, value, pos)) abort();
foreach (Bindings::iterator, i, *args[0]->attrs) {
string key = aterm2String(i->first);
startNest(nest, lvlVomit, format("processing attribute `%1%'") % key);
try {
@ -321,15 +315,9 @@ 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") {
ATermList es;
value = evalExpr(state, value);
if (!matchList(value, es)) {
static bool haveWarned = false;
warnOnce(haveWarned, "the `args' attribute should evaluate to a list");
es = flattenList(state, value);
}
for (ATermIterator i(es); i; ++i) {
string s = coerceToString(state, *i, context, true);
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);
drv.args.push_back(s);
}
}
@ -337,7 +325,7 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
/* All other attributes are passed to the builder through
the environment. */
else {
string s = coerceToString(state, value, context, true);
string s = state.coerceToString(i->second, context, true);
drv.env[key] = s;
if (key == "builder") drv.builder = s;
else if (key == "system") drv.platform = s;
@ -352,13 +340,12 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
}
} catch (Error & e) {
e.addPrefix(format("while evaluating the derivation attribute `%1%' at %2%:\n")
% key % showPos(pos));
e.addPrefix(format("while instantiating the derivation named `%1%' at %2%:\n")
% drvName % showPos(posDrvName));
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) */);
throw;
}
}
/* Everything in the context of the strings in the derivation
@ -466,25 +453,25 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
state.drvHashes[drvPath] = hashDerivationModulo(state, drv);
/* !!! assumes a single output */
ATermMap outAttrs(2);
outAttrs.set(toATerm("outPath"),
makeAttrRHS(makeStr(outPath, singleton<PathSet>(drvPath)), makeNoPos()));
outAttrs.set(toATerm("drvPath"),
makeAttrRHS(makeStr(drvPath, singleton<PathSet>("=" + drvPath)), makeNoPos()));
return makeAttrs(outAttrs);
//state.mkAttrs(v);
state.cloneAttrs(*args[0], v);
mkString((*v.attrs)[toATerm("outPath")], outPath, singleton<PathSet>(drvPath));
mkString((*v.attrs)[toATerm("drvPath")], drvPath, singleton<PathSet>("=" + drvPath));
mkString((*v.attrs)[toATerm("type")], "derivation"); // !!! remove
}
static void prim_derivationLazy(EvalState & state, Value * * args, Value & v)
{
Expr eAttrs = evalExpr(state, args[0]);
ATermMap attrs;
queryAllAttrs(eAttrs, attrs, true);
state.forceAttrs(*args[0]);
attrs.set(toATerm("type"),
makeAttrRHS(makeStr("derivation"), makeNoPos()));
state.cloneAttrs(*args[0], v);
mkString((*v.attrs)[toATerm("type")], "derivation");
/* !!! */
#if 0
Expr drvStrict = makeCall(makeVar(toATerm("derivation!")), eAttrs);
attrs.set(toATerm("outPath"),
@ -493,8 +480,8 @@ static void prim_derivationLazy(EvalState & state, Value * * args, Value & v)
makeAttrRHS(makeSelect(drvStrict, toATerm("drvPath")), makeNoPos()));
return makeAttrs(attrs);
}
#endif
}
/*************************************************************
@ -592,6 +579,7 @@ static void prim_toXML(EvalState & state, Value * * args, Value & v)
printTermAsXML(strictEvalExpr(state, args[0]), out, context);
return makeStr(out.str(), context);
}
#endif
/* Store a string in the Nix store as a source file that can be used
@ -599,12 +587,12 @@ static void prim_toXML(EvalState & state, Value * * args, Value & v)
static void prim_toFile(EvalState & state, Value * * args, Value & v)
{
PathSet context;
string name = evalStringNoCtx(state, args[0]);
string contents = evalString(state, args[1], context);
string name = state.forceStringNoCtx(*args[0]);
string contents = state.forceString(*args[1]); // !!! context
PathSet refs;
for (PathSet::iterator i = context.begin(); i != context.end(); ++i) {
foreach (PathSet::iterator, i, context) {
Path path = *i;
if (path.at(0) == '=') path = string(path, 1);
if (isDerivation(path))
@ -620,10 +608,11 @@ static void prim_toFile(EvalState & state, Value * * args, Value & v)
result, since `storePath' itself has references to the paths
used in args[1]. */
return makeStr(storePath, singleton<PathSet>(storePath));
mkString(v, storePath, singleton<PathSet>(storePath));
}
#if 0
struct FilterFromExpr : PathFilter
{
EvalState & state;
@ -731,10 +720,7 @@ static void prim_removeAttrs(EvalState & state, Value * * args, Value & v)
state.forceAttrs(*args[0]);
state.forceList(*args[1]);
state.mkAttrs(v);
foreach (Bindings::iterator, i, *args[0]->attrs)
(*v.attrs)[i->first] = i->second;
state.cloneAttrs(*args[0], v);
for (unsigned int i = 0; i < args[1]->list.length; ++i) {
state.forceStringNoCtx(args[1]->list.elems[i]);
@ -743,40 +729,32 @@ static void prim_removeAttrs(EvalState & state, Value * * args, Value & v)
}
#if 0
/* Builds an attribute set from a list specifying (name, value)
pairs. To be precise, a list [{name = "name1"; value = value1;}
... {name = "nameN"; value = valueN;}] is transformed to {name1 =
value1; ... nameN = valueN;}. */
static void prim_listToAttrs(EvalState & state, Value * * args, Value & v)
{
try {
ATermMap res = ATermMap();
ATermList list;
list = evalList(state, args[0]);
for (ATermIterator i(list); i; ++i){
// *i should now contain a pointer to the list item expression
ATermList attrs;
Expr evaledExpr = evalExpr(state, *i);
if (matchAttrs(evaledExpr, attrs)){
Expr e = evalExpr(state, makeSelect(evaledExpr, toATerm("name")));
string attr = evalStringNoCtx(state,e);
Expr r = makeSelect(evaledExpr, toATerm("value"));
res.set(toATerm(attr), makeAttrRHS(r, makeNoPos()));
}
else
throw TypeError(format("list element in `listToAttrs' is %s, expected a set { name = \"<name>\"; value = <value>; }")
% showType(evaledExpr));
}
state.forceList(*args[0]);
return makeAttrs(res);
state.mkAttrs(v);
} catch (Error & e) {
e.addPrefix(format("in `listToAttrs':\n"));
throw;
for (unsigned int i = 0; i < args[0]->list.length; ++i) {
Value & v2(args[0]->list.elems[i]);
state.forceAttrs(v2);
Bindings::iterator j = v2.attrs->find(toATerm("name"));
if (j == v2.attrs->end())
throw TypeError("`name' attribute missing in a call to `listToAttrs'");
string name = state.forceStringNoCtx(j->second);
j = v2.attrs->find(toATerm("value"));
if (j == v2.attrs->end())
throw TypeError("`value' attribute missing in a call to `listToAttrs'");
(*v.attrs)[toATerm(name)] = j->second; // !!! sharing?
}
}
#endif
#if 0
@ -897,7 +875,7 @@ static void prim_map(EvalState & state, Value * * args, Value & v)
static void prim_length(EvalState & state, Value * * args, Value & v)
{
state.forceList(*args[0]);
mkInt(v, v.list.length);
mkInt(v, args[0]->list.length);
}
@ -1111,11 +1089,11 @@ void EvalState::createBaseEnv()
// Expr <-> String
addPrimOp("__exprToString", 1, prim_exprToString);
addPrimOp("__stringToExpr", 1, prim_stringToExpr);
#endif
// Derivations
addPrimOp("derivation!", 1, prim_derivationStrict);
addPrimOp("derivation", 1, prim_derivationLazy);
#endif
addPrimOp("derivation", 1, prim_derivationStrict);
//addPrimOp("derivation", 1, prim_derivationLazy);
// Paths
addPrimOp("__toPath", 1, prim_toPath);
@ -1130,7 +1108,9 @@ void EvalState::createBaseEnv()
// Creating files
#if 0
addPrimOp("__toXML", 1, prim_toXML);
#endif
addPrimOp("__toFile", 2, prim_toFile);
#if 0
addPrimOp("__filterSource", 2, prim_filterSource);
#endif
@ -1140,8 +1120,8 @@ void EvalState::createBaseEnv()
addPrimOp("__hasAttr", 2, prim_hasAttr);
addPrimOp("__isAttrs", 1, prim_isAttrs);
addPrimOp("removeAttrs", 2, prim_removeAttrs);
#if 0
addPrimOp("__listToAttrs", 1, prim_listToAttrs);
#if 0
addPrimOp("__intersectAttrs", 2, prim_intersectAttrs);
addPrimOp("__functionArgs", 1, prim_functionArgs);
#endif

17
src/nix-instantiate/nix-instantiate.cc
View file

@ -75,8 +75,23 @@ void processExpr(EvalState & state, const Strings & attrPaths,
std::cout << format("%1%\n") % canonicaliseExpr(e);
else {
Value v;
state.strictEval(e, v);
if (strict) state.strictEval(e, v); else state.eval(e, v);
if (evalOnly)
std::cout << v << std::endl;
else {
DrvInfos drvs;
getDerivations(state, v, "", autoArgs, drvs);
foreach (DrvInfos::iterator, i, drvs) {
Path drvPath = i->queryDrvPath(state);
if (gcRoot == "")
printGCWarning();
else
drvPath = addPermRoot(drvPath,
makeRootName(gcRoot, rootNr),
indirectRoot);
std::cout << format("%1%\n") % drvPath;
}
}
}
#if 0