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* Applied rbroek's patch from the branch at

Browse source 
https://svn.cs.uu.nl:12443/repos/trace/buildfarm-control/trunk/ext/nix/,
  with some modifications.  This allows `nix-env -qa' to show the
  attribute path that can be used to unambiguously install a package
  using `nix-env -i -A'.  Example:

    $ nix-env -f top-level/all-packages.nix -qaA subversion xorg-server
    subversionWithJava  subversion-1.2.3
    subversion          subversion-1.3.2
    subversion14        subversion-1.4.0pre-rc1
    xorg.xorgserver     xorg-server-1.1.0
This commit is contained in:
Eelco Dolstra 2006-07-25 16:40:38 +00:00
parent b11aeb2c4b
commit 0e6dc72a7a
4 changed files with 37 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

44
src/libexpr/get-drvs.cc
View file

@ -58,7 +58,7 @@ typedef set<Expr> Exprs;
it makes sense for the caller to recursively search for derivations
in `e'. */
static bool getDerivation(EvalState & state, Expr e,
DrvInfos & drvs, Exprs & doneExprs)
DrvInfos & drvs, Exprs & doneExprs, string attributeName)
{
try {
@ -92,6 +92,8 @@ static bool getDerivation(EvalState & state, Expr e,
drv.attrs = attrs;
drv.attrPath = attributeName;
drvs.push_back(drv);
return false;
@ -105,15 +107,22 @@ bool getDerivation(EvalState & state, Expr e, DrvInfo & drv)
{
Exprs doneExprs;
DrvInfos drvs;
getDerivation(state, e, drvs, doneExprs);
getDerivation(state, e, drvs, doneExprs, "");
if (drvs.size() != 1) return false;
drv = drvs.front();
return true;
}
static string addToPath(const string & s1, const string & s2)
{
return s1.empty() ? s2 : s1 + "." + s2;
}
static void getDerivations(EvalState & state, Expr e,
DrvInfos & drvs, Exprs & doneExprs, const string & attrPath)
DrvInfos & drvs, Exprs & doneExprs, const string & attrPath,
const string & pathTaken)
{
/* Automatically call functions that have defaults for all
arguments. */
@ -129,7 +138,7 @@ static void getDerivations(EvalState & state, Expr e,
}
getDerivations(state,
makeCall(e, makeAttrs(ATermMap(0))),
drvs, doneExprs, attrPath);
drvs, doneExprs, attrPath, pathTaken);
return;
}
@ -160,7 +169,7 @@ static void getDerivations(EvalState & state, Expr e,
ATermList es;
DrvInfo drv;
if (!getDerivation(state, e, drvs, doneExprs)) {
if (!getDerivation(state, e, drvs, doneExprs, pathTaken)) {
if (apType != apNone) throw attrError;
return;
}
@ -175,7 +184,8 @@ static void getDerivations(EvalState & state, Expr e,
for (ATermMap::const_iterator i = drvMap.begin(); i != drvMap.end(); ++i) {
startNest(nest, lvlDebug,
format("evaluating attribute `%1%'") % aterm2String(i->key));
if (getDerivation(state, i->value, drvs, doneExprs)) {
string pathTaken2 = addToPath(pathTaken, aterm2String(i->key));
if (getDerivation(state, i->value, drvs, doneExprs, pathTaken2)) {
/* If the value of this attribute is itself an
attribute set, should we recurse into it?
=> Only if it has a `recurseForDerivations = true'
@ -187,7 +197,7 @@ static void getDerivations(EvalState & state, Expr e,
queryAllAttrs(e, attrs, false);
Expr e2 = attrs.get(toATerm("recurseForDerivations"));
if (e2 && evalBool(state, e2))
getDerivations(state, e, drvs, doneExprs, attrPathRest);
getDerivations(state, e, drvs, doneExprs, attrPathRest, pathTaken2);
}
}
}
@ -196,9 +206,10 @@ static void getDerivations(EvalState & state, Expr e,
if (!e2) throw Error(format("attribute `%1%' in selection path not found") % attr);
startNest(nest, lvlDebug,
format("evaluating attribute `%1%'") % attr);
getDerivation(state, e2, drvs, doneExprs);
string pathTaken2 = addToPath(pathTaken, attr);
getDerivation(state, e2, drvs, doneExprs, pathTaken2);
if (!attrPath.empty())
getDerivations(state, e2, drvs, doneExprs, attrPathRest);
getDerivations(state, e2, drvs, doneExprs, attrPathRest, pathTaken2);
}
return;
}
@ -206,19 +217,22 @@ static void getDerivations(EvalState & state, Expr e,
if (matchList(e, es)) {
if (apType != apNone && apType != apIndex) throw attrError;
if (apType == apNone) {
for (ATermIterator i(es); i; ++i) {
int n = 0;
for (ATermIterator i(es); i; ++i, ++n) {
startNest(nest, lvlDebug,
format("evaluating list element"));
if (getDerivation(state, *i, drvs, doneExprs))
getDerivations(state, *i, drvs, doneExprs, attrPathRest);
string pathTaken2 = addToPath(pathTaken, (format("%1%") % n).str());
if (getDerivation(state, *i, drvs, doneExprs, pathTaken2))
getDerivations(state, *i, drvs, doneExprs, attrPathRest, pathTaken2);
}
} else {
Expr e2 = ATelementAt(es, attrIndex);
if (!e2) throw Error(format("list index %1% in selection path not found") % attrIndex);
startNest(nest, lvlDebug,
format("evaluating list element"));
if (getDerivation(state, e2, drvs, doneExprs))
getDerivations(state, e2, drvs, doneExprs, attrPathRest);
string pathTaken2 = addToPath(pathTaken, (format("%1%") % attrIndex).str());
if (getDerivation(state, e2, drvs, doneExprs, pathTaken2))
getDerivations(state, e2, drvs, doneExprs, attrPathRest, pathTaken2);
}
return;
}
@ -231,5 +245,5 @@ void getDerivations(EvalState & state, Expr e, DrvInfos & drvs,
const string & attrPath)
{
Exprs doneExprs;
getDerivations(state, e, drvs, doneExprs, attrPath);
getDerivations(state, e, drvs, doneExprs, attrPath, "");
}

1
src/libexpr/get-drvs.hh
View file

@ -20,6 +20,7 @@ private:
public:
string name;
string attrPath; /* path towards the derivation */
string system;
shared_ptr<ATermMap> attrs;