src/c/eval-jobs.cc

@@ -5,7 +5,9 @@
 #include "store-api.hh"
 #include "eval.hh"
 #include "parser.hh"
-#include "expr-to-xml.hh"
+#include "nixexpr-ast.hh"
+#include "util.hh"
+#include "xml-writer.hh"
 
 using namespace nix;
 
@@ -16,6 +18,63 @@ void printHelp()
 }
 
 
+Expr evalAttr(EvalState & state, Expr e)
+{
+    return e ? evalExpr(state, e) : e;
+}
+
+
+static void findJobs(EvalState & state, XMLWriter & doc,
+    Expr e, const string & attrPath)
+{
+    std::cerr << "at `" << attrPath << "'\n";
+    
+    e = evalExpr(state, e);
+
+    ATermList as, es;
+    ATerm pat, body, pos;
+    string s;
+    PathSet context;
+    
+    if (matchAttrs(e, as)) {
+        ATermMap attrs;
+        queryAllAttrs(e, attrs);
+
+        Expr a = evalAttr(state, attrs.get(toATerm("type")));
+        if (a && matchStr(a, s, context) && s == "derivation") {
+            std::cerr << "derivation\n";
+
+            XMLAttrs xmlAttrs;
+            Path outPath, drvPath;
+
+            xmlAttrs["name"] = attrPath;
+            
+            a = evalAttr(state, attrs.get(toATerm("drvPath")));
+            if (matchStr(a, drvPath, context)) xmlAttrs["drvPath"] = drvPath;
+        
+            a = evalAttr(state, attrs.get(toATerm("outPath")));
+            if (matchStr(a, outPath, context)) xmlAttrs["outPath"] = outPath;
+
+            XMLOpenElement _(doc, "job", xmlAttrs);
+        }
+
+        else {
+            std::cerr << "attrset\n";
+            foreach (ATermMap::const_iterator, i, attrs)
+                findJobs(state, doc, i->value,
+                    (attrPath.empty() ? "" : attrPath + ".") + aterm2String(i->key));
+        }
+    }
+
+    else if (matchFunction(e, pat, body, pos)) {
+        std::cerr << "function\n";
+    }
+        
+    else 
+        std::cerr << showValue(e) << "\n";
+}
+
+
 void run(Strings args)
 {
     EvalState state;
@@ -31,10 +90,11 @@ void run(Strings args)
 
     store = openStore();
 
-    Expr e = evalExpr(state, parseExprFromFile(state, releaseExpr));
+    Expr e = parseExprFromFile(state, releaseExpr);
 
-    PathSet context;
-    printTermAsXML(e, std::cout, context);
+    XMLWriter doc(true, std::cout);
+    XMLOpenElement root(doc, "jobs");
+    findJobs(state, doc, e, "");
 }