1 files changed, 66 insertions, 0 deletions
diff --git a/src/nix-store/xmlgraph.cc b/src/nix-store/xmlgraph.cc
new file mode 100644
index 000000000000..0f7be7f7a02d
--- /dev/null
+++ b/src/nix-store/xmlgraph.cc
@@ -0,0 +1,66 @@
+#include "xmlgraph.hh"
+#include "util.hh"
+#include "store-api.hh"
+
+#include <iostream>
+
+
+using std::cout;
+
+namespace nix {
+
+
+static inline const string & xmlQuote(const string & s)
+{
+    // Luckily, store paths shouldn't contain any character that needs to be
+    // quoted.
+    return s;
+}
+
+
+static string makeEdge(const string & src, const string & dst)
+{
+    format f = format("  <edge src=\"%1%\" dst=\"%2%\"/>\n")
+      % xmlQuote(src) % xmlQuote(dst);
+    return f.str();
+}
+
+
+static string makeNode(const string & id)
+{
+    format f = format("  <node name=\"%1%\"/>\n") % xmlQuote(id);
+    return f.str();
+}
+
+
+void printXmlGraph(ref<Store> store, const PathSet & roots)
+{
+    PathSet workList(roots);
+    PathSet doneSet;
+
+    cout << "<?xml version='1.0' encoding='utf-8'?>\n"
+         << "<nix>\n";
+
+    while (!workList.empty()) {
+        Path path = *(workList.begin());
+        workList.erase(path);
+
+        if (doneSet.find(path) != doneSet.end()) continue;
+        doneSet.insert(path);
+
+        cout << makeNode(path);
+
+        for (auto & p : store->queryPathInfo(path)->references) {
+            if (p != path) {
+                workList.insert(p);
+                cout << makeEdge(p, path);
+            }
+        }
+
+    }
+
+    cout << "</nix>\n";
+}
+
+
+}