* Sync with the trunk.

corepkgs/buildenv/builder.pl.in

@@ -29,10 +29,18 @@ sub createLinks {
         $baseName =~ s/^.*\///g; # strip directory
         my $dstFile = "$dstDir/$baseName";
 
+        # The files below are special-cased so that they don't show up
+        # in user profiles, either because they are useless, or
+        # because they would cause pointless collisions (e.g., each
+        # Python package brings its own
+        # `$out/lib/pythonX.Y/site-packages/easy-install.pth'.)
         # Urgh, hacky...
         if ($srcFile =~ /\/propagated-build-inputs$/ ||
             $srcFile =~ /\/nix-support$/ ||
             $srcFile =~ /\/perllocal.pod$/ ||
+            $srcFile =~ /\/easy-install.pth$/ ||
+            $srcFile =~ /\/site.py$/ ||
+            $srcFile =~ /\/site.pyc$/ ||
             $srcFile =~ /\/info\/dir$/ ||
             $srcFile =~ /\/log$/)
         {

doc/manual/nix-store.xml

@@ -342,7 +342,7 @@ $ nix-store --gc --max-freed $((100 * 1024 * 1024))</screen>
 
 <cmdsynopsis>
   <command>nix-store</command>
-  <arg choice='plain'><option>--gc</option></arg>
+  <arg choice='plain'><option>--delete</option></arg>
   <arg><option>--ignore-liveness</option></arg>
   <arg choice='plain' rep='repeat'><replaceable>paths</replaceable></arg>
 </cmdsynopsis>

src/libexpr/primops.cc

@@ -582,7 +582,7 @@ static void prim_toXML(EvalState & state, Value * * args, Value & v)
 {
     std::ostringstream out;
     PathSet context;
-    printValueAsXML(state, true, *args[0], out, context);
+    printValueAsXML(state, true, false, *args[0], out, context);
     mkString(v, out.str(), context);
 }
 

src/libexpr/value-to-xml.cc

@@ -16,26 +16,40 @@ static XMLAttrs singletonAttrs(const string & name, const string & value)
 }
 
 
-static void printValueAsXML(EvalState & state, bool strict, Value & v,
+static void printValueAsXML(EvalState & state, bool strict, bool location,
-    XMLWriter & doc, PathSet & context, PathSet & drvsSeen);
+    Value & v, XMLWriter & doc, PathSet & context, PathSet & drvsSeen);
 
 
-static void showAttrs(EvalState & state, bool strict, Bindings & attrs,
+static void posToXML(XMLAttrs & xmlAttrs, const Pos & pos)
-    XMLWriter & doc, PathSet & context, PathSet & drvsSeen)
+{
+    xmlAttrs["path"] = pos.file;
+    xmlAttrs["line"] = (format("%1%") % pos.line).str();
+    xmlAttrs["column"] = (format("%1%") % pos.column).str();
+}
+
+
+static void showAttrs(EvalState & state, bool strict, bool location,
+    Bindings & attrs, XMLWriter & doc, PathSet & context, PathSet & drvsSeen)
 {
     StringSet names;
     foreach (Bindings::iterator, i, attrs)
         names.insert(i->first);
     foreach (StringSet::iterator, i, names) {
-        XMLOpenElement _(doc, "attr", singletonAttrs("name", *i));
+        Attr & a(attrs[state.symbols.create(*i)]);
-        printValueAsXML(state, strict, attrs[state.symbols.create(*i)].value,
+        
-            doc, context, drvsSeen);
+        XMLAttrs xmlAttrs;
+        xmlAttrs["name"] = *i;
+        if (location && a.pos != &noPos) posToXML(xmlAttrs, *a.pos);
+        
+        XMLOpenElement _(doc, "attr", xmlAttrs);
+        printValueAsXML(state, strict, location,
+            a.value, doc, context, drvsSeen);
     }
 }
 
 
-static void printValueAsXML(EvalState & state, bool strict, Value & v,
+static void printValueAsXML(EvalState & state, bool strict, bool location,
-    XMLWriter & doc, PathSet & context, PathSet & drvsSeen)
+    Value & v, XMLWriter & doc, PathSet & context, PathSet & drvsSeen)
 {
     checkInterrupt();
 
@@ -72,25 +86,31 @@ static void printValueAsXML(EvalState & state, bool strict, Value & v,
 
                 Path drvPath;
                 a = v.attrs->find(state.sDrvPath);
-                if (a != v.attrs->end() && a->second.value.type == tString)
+                if (a != v.attrs->end()) {
+                    if (strict) state.forceValue(a->second.value);
+                    if (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.value.type == tString)
+                if (a != v.attrs->end()) {
+                    if (strict) state.forceValue(a->second.value);
+                    if (a->second.value.type == tString)
                         xmlAttrs["outPath"] = a->second.value.string.s;
+                }
 
                 XMLOpenElement _(doc, "derivation", xmlAttrs);
 
                 if (drvPath != "" && drvsSeen.find(drvPath) == drvsSeen.end()) {
                     drvsSeen.insert(drvPath);
-                    showAttrs(state, strict, *v.attrs, doc, context, drvsSeen);
+                    showAttrs(state, strict, location, *v.attrs, doc, context, drvsSeen);
                 } else
                     doc.writeEmptyElement("repeated");
             }
 
             else {
                 XMLOpenElement _(doc, "attrs");
-                showAttrs(state, strict, *v.attrs, doc, context, drvsSeen);
+                showAttrs(state, strict, location, *v.attrs, doc, context, drvsSeen);
             }
             
             break;
@@ -98,12 +118,15 @@ static void printValueAsXML(EvalState & state, bool strict, Value & v,
         case tList: {
             XMLOpenElement _(doc, "list");
             for (unsigned int n = 0; n < v.list.length; ++n)
-                printValueAsXML(state, strict, *v.list.elems[n], doc, context, drvsSeen);
+                printValueAsXML(state, strict, location, *v.list.elems[n], doc, context, drvsSeen);
             break;
         }
 
         case tLambda: {
-            XMLOpenElement _(doc, "function");
+            XMLAttrs xmlAttrs;
+            if (location) posToXML(xmlAttrs, v.lambda.fun->pos);
+            XMLOpenElement _(doc, "function", xmlAttrs);
+            
             if (v.lambda.fun->matchAttrs) {
                 XMLAttrs attrs;
                 if (!v.lambda.fun->arg.empty()) attrs["name"] = v.lambda.fun->arg;
@@ -113,6 +136,7 @@ static void printValueAsXML(EvalState & state, bool strict, Value & v,
                     doc.writeEmptyElement("attr", singletonAttrs("name", i->name));
             } else
                 doc.writeEmptyElement("varpat", singletonAttrs("name", v.lambda.fun->arg));
+            
             break;
         }
 
@@ -122,13 +146,13 @@ static void printValueAsXML(EvalState & state, bool strict, Value & v,
 }
 
 
-void printValueAsXML(EvalState & state, bool strict,
+void printValueAsXML(EvalState & state, bool strict, bool location,
     Value & v, std::ostream & out, PathSet & context)
 {
     XMLWriter doc(true, out);
     XMLOpenElement root(doc, "expr");
     PathSet drvsSeen;    
-    printValueAsXML(state, strict, v, doc, context, drvsSeen);
+    printValueAsXML(state, strict, location, v, doc, context, drvsSeen);
 }
 
  

src/libexpr/value-to-xml.hh

@@ -9,7 +9,7 @@
 
 namespace nix {
 
-void printValueAsXML(EvalState & state, bool strict,
+void printValueAsXML(EvalState & state, bool strict, bool location,
     Value & v, std::ostream & out, PathSet & context);
     
 }

src/libutil/xml-writer.cc

@@ -91,6 +91,7 @@ void XMLWriter::writeAttrs(const XMLAttrs & attrs)
             char c = i->second[j];
             if (c == '"') output << "&quot;";
             else if (c == '<') output << "&lt;";
+            else if (c == '>') output << "&gt;";
             else if (c == '&') output << "&amp;";
             /* Escape newlines to prevent attribute normalisation (see
                XML spec, section 3.3.3. */

src/nix-instantiate/help.txt

@@ -22,6 +22,8 @@ Options:
 For --eval-only / --parse-only:
 
   --xml: print an XML representation of the abstract syntax tree
+  --no-location: don't provide source location information in the
+    output XML tree
 
 For --eval-only:
 

src/nix-instantiate/nix-instantiate.cc

@@ -39,7 +39,7 @@ static bool indirectRoot = false;
 
 void processExpr(EvalState & state, const Strings & attrPaths,
     bool parseOnly, bool strict, const Bindings & autoArgs,
-    bool evalOnly, bool xmlOutput, Expr * e)
+    bool evalOnly, bool xmlOutput, bool location, Expr * e)
 {
     if (parseOnly)
         std::cout << format("%1%\n") % *e;
@@ -52,7 +52,7 @@ void processExpr(EvalState & state, const Strings & attrPaths,
             PathSet context;
             if (evalOnly)
                 if (xmlOutput)
-                    printValueAsXML(state, strict, v, std::cout, context);
+                    printValueAsXML(state, strict, location, v, std::cout, context);
                 else {
                     if (strict) state.strictForceValue(v);
                     std::cout << v << std::endl;
@@ -83,6 +83,7 @@ void run(Strings args)
     bool evalOnly = false;
     bool parseOnly = false;
     bool xmlOutput = false;
+    bool xmlOutputSourceLocation = true;
     bool strict = false;
     Strings attrPaths;
     Bindings autoArgs;
@@ -116,6 +117,8 @@ void run(Strings args)
             indirectRoot = true;
         else if (arg == "--xml")
             xmlOutput = true;
+        else if (arg == "--no-location")
+            xmlOutputSourceLocation = false;
         else if (arg == "--strict")
             strict = true;
         else if (arg[0] == '-')
@@ -131,14 +134,14 @@ void run(Strings args)
     if (readStdin) {
         Expr * e = parseStdin(state);
         processExpr(state, attrPaths, parseOnly, strict, autoArgs,
-            evalOnly, xmlOutput, e);
+            evalOnly, xmlOutput, xmlOutputSourceLocation, e);
     }
 
     foreach (Strings::iterator, i, files) {
         Path path = absPath(*i);
         Expr * e = parseExprFromFile(state, path);
         processExpr(state, attrPaths, parseOnly, strict, autoArgs,
-            evalOnly, xmlOutput, e);
+            evalOnly, xmlOutput, xmlOutputSourceLocation, e);
     }
 
     state.printStats();

tests/lang.sh

@@ -50,7 +50,8 @@ for i in lang/eval-okay-*.nix; do
     fi
     
     if test -e lang/$i.exp.xml; then
-        if ! $nixinstantiate --eval-only --xml --strict lang/$i.nix > lang/$i.out.xml; then
+        if ! $nixinstantiate --eval-only --xml --no-location --strict \
+                lang/$i.nix > lang/$i.out.xml; then
             echo "FAIL: $i should evaluate"
             fail=1
         elif ! cmp -s lang/$i.out.xml lang/$i.exp.xml; then

tests/lang/eval-okay-toxml.exp

@@ -0,0 +1 @@
+"<?xml version='1.0' encoding='utf-8'?>\n<expr>\n  <attrs>\n    <attr name=\"a\">\n      <string value=\"s\" />\n    </attr>\n  </attrs>\n</expr>\n"

tests/lang/eval-okay-toxml.nix

@@ -0,0 +1,3 @@
+# Make sure the expected XML output is produced; in particular, make sure it
+# doesn't contain source location information.
+builtins.toXML { a = "s"; }